51
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Li X, Wang G, Li J, Sun Y, Deng X, Zhang K. Intense Organic Afterglow Enabled by Molecular Engineering in Dopant-Matrix Systems. ACS APPLIED MATERIALS & INTERFACES 2022; 14:1587-1600. [PMID: 34963292 DOI: 10.1021/acsami.1c20331] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We report intense dopant-matrix afterglow systems with an afterglow efficiency (ΦAG) of 47% and an afterglow lifetime (τAG) of 1.3 s. Luminescent difluoroboron β-diketonate (BF2bdk) dopants and their deuterated counterparts are designed with naphthalene and carboxylic acid groups. After doping into benzoic acid (BA) matrices, room-temperature afterglow brightness and afterglow duration of the BF2bdk-BA materials have unexpectedly been found to reach the levels of those at 77 K, which indicates that hydrogen bonding between BF2bdk and BA, as well as the deuteration technique, can reduce knr + kq of BF2bdk triplets to very small values even at room temperature. Detailed studies reveal that the BF2bdk possesses typical 1ICT characters in the S1 state and distinct 3LE composition in the T1 state, and thus shows a high ΦISC and a small kP to obtain a high ΦAG and a long τAG. Besides, triplet-triplet annihilation has been found in the dopant-matrix system at high doping concentrations to further increase ΦAG.
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Affiliation(s)
- Xun Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Guangming Wang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Jiuyang Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Yan Sun
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Xinjian Deng
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
| | - Kaka Zhang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
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52
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Liu J, Chen Z, Hu J, Sun H, Liu Y, Liu Z, Li J. Time-resolved color-changing long-afterglow for security systems based on metal–organic hybrids. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01435h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Himpc-based phosphors exhibit diverse afterglow performances by modulating molecular aggregation dispositions for anti-counterfeiting application.
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Affiliation(s)
- Jing Liu
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Henan 450001, P. R. China
| | - Ziang Chen
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Henan 450001, P. R. China
| | - Jia Hu
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Henan 450001, P. R. China
| | - Hongxia Sun
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Henan 450001, P. R. China
| | - Yan Liu
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Henan 450001, P. R. China
| | - Zhongyi Liu
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Henan 450001, P. R. China
| | - Jinpeng Li
- College of Chemistry and Green Catalysis Center, Zhengzhou University, Henan 450001, P. R. China
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53
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Feng B, Zhang G, Feng X, Chen Y. Palladium-catalyzed decarbonylative methylation of aryl carboxylic acids. Org Chem Front 2022. [DOI: 10.1039/d1qo01756j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Described herein is a palladium-catalyzed decarbonylative methylation of general carboxylic acids, providing an efficient method for Ar–Me bond formation.
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Affiliation(s)
- Boya Feng
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, 210014, China
| | - Guodong Zhang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, 210014, China
| | - Xu Feng
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, 210014, China
| | - Yu Chen
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, 210014, China
- Jiangsu Province Engineering Research Center of Eco-cultivation and High-value Utilization of Chinese Medicinal Materials, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, 210014, China
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54
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Ito S. Luminescent polymorphic crystals: mechanoresponsive and multicolor-emissive properties. CrystEngComm 2022. [DOI: 10.1039/d1ce01614h] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Polymorphic organic crystals that can switch their photophysical properties in response to mechanical stimuli are highlighted.
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Affiliation(s)
- Suguru Ito
- Department of Chemistry and Life Science, Graduate School of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
- PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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55
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Wang C, Ma X, Guo P, Jiang C, Liu Y, Liu G, Xu X, Liu Y. Highly Reversible Supramolecular Light Switch for NIR Phosphorescence Resonance Energy Transfer. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103041. [PMID: 34738729 PMCID: PMC8805551 DOI: 10.1002/advs.202103041] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/08/2021] [Indexed: 05/23/2023]
Abstract
Although purely organic room-temperature phosphorescence (RTP) has drawn widespread attention in recent years, regulatable phosphorescence resonance energy transfer (PRET) supramolecular switch is still rare. Herein, single molecular dual-fold supramolecular light switches, which are constructed by phenylpyridinium salts modified diarylethene derivatives (DTE-Cn, n = 3, 5) and cucurbit[8]uril (CB[8]) are reported. Significantly, biaxial [3]pseudorotaxane displayed efficiently reversible RTP after binding with CB[8] and the phosphorescence quenching efficiency is calculated up to be 99%. Furthermore, the binary supramolecular assembly can coassemble with Cy5 to form ternary supramolecular assembly showing efficiently PRET, which is successfully applied in switchable near infrared (NIR) mitochondria-targeted cell imaging and photocontrolled data encryption. This supramolecular strategy involving energy transfer provides a convenient approach for phosphorescent application in biology and material fields.
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Affiliation(s)
- Conghui Wang
- College of ChemistryState Key Laboratory of Elemento‐Organic ChemistryNankai UniversityTianjin300071China
| | - Xin‐Kun Ma
- College of ChemistryState Key Laboratory of Elemento‐Organic ChemistryNankai UniversityTianjin300071China
| | - Peng Guo
- College of ChemistryState Key Laboratory of Elemento‐Organic ChemistryNankai UniversityTianjin300071China
| | - Chunhui Jiang
- College of ChemistryState Key Laboratory of Elemento‐Organic ChemistryNankai UniversityTianjin300071China
| | - Yao‐Hua Liu
- College of ChemistryState Key Laboratory of Elemento‐Organic ChemistryNankai UniversityTianjin300071China
| | - Guoxing Liu
- College of ChemistryState Key Laboratory of Elemento‐Organic ChemistryNankai UniversityTianjin300071China
| | - Xiufang Xu
- College of ChemistryState Key Laboratory of Elemento‐Organic ChemistryNankai UniversityTianjin300071China
| | - Yu Liu
- College of ChemistryState Key Laboratory of Elemento‐Organic ChemistryNankai UniversityTianjin300071China
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56
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Zhou J, Mao L, Wu MX, Peng Z, Yang Y, Zhou M, Zhao XL, Shi X, Yang HB. Extended phenothiazines: synthesis, photophysical and redox properties, and efficient photocatalytic oxidative coupling of amines. Chem Sci 2022; 13:5252-5260. [PMID: 35655566 PMCID: PMC9093200 DOI: 10.1039/d2sc01086k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 04/08/2022] [Indexed: 11/21/2022] Open
Abstract
Herein, we successfully developed a ring-fusion approach to extend the conjugation length of phenothiazines that were demonstrated to be efficient photocatalysts for visible-light-driven oxidative coupling reactions of amines under an air atmosphere.
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Affiliation(s)
- Jun Zhou
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
| | - Lijun Mao
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
| | - Meng-Xiang Wu
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
| | - Zhiyong Peng
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
| | - Yiming Yang
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
| | - Manfei Zhou
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
| | - Xiao-Li Zhao
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
| | - Xueliang Shi
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
| | - Hai-Bo Yang
- School of Chemistry and Molecular Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663 N, Zhongshan Road, Shanghai 200062, P. R. China
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57
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Jiang R, Wu X, Liu H, Guo J, Zou D, Zhao Z, Tang BZ. High-Performance Orange-Red Organic Light-Emitting Diodes with External Quantum Efficiencies Reaching 33.5% based on Carbonyl-Containing Delayed Fluorescence Molecules. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104435. [PMID: 34923776 PMCID: PMC8787409 DOI: 10.1002/advs.202104435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/17/2021] [Indexed: 06/14/2023]
Abstract
Developing orange to red purely organic luminescent materials having external quantum efficiencies (ηext s) exceeding 30% is challenging because it generally requires strong intramolecular charge transfer, efficient reverse intersystem crossing (RISC), high photoluminescence quantum yield (ΦPL ), and large optical outcoupling efficiency (Φout ) simultaneously. Herein, by introducing benzoyl to dibenzo[a,c]phenazine acceptor, a stronger electron acceptor, dibenzo[a,c]phenazin-11-yl(phenyl)methanone, is created and employed for constructing orange-red delayed fluorescence molecules with various acridine-based electron donors. The incorporation of benzoyl leads to red-shifted photoluminescence with accelerated RISC, reduced delayed lifetimes, and increased ΦPL s, and the adoption of spiro-structured acridine donors promotes horizontal dipole orientation and thus renders high Φout s. Consequently, the state-of-the-art orange-red organic light-emitting diodes are achieved, providing record-high electroluminescence (EL) efficiencies of 33.5%, 95.3 cd A-1 , and 93.5 lm W-1 . By referring the control molecule without benzoyl, it is demonstrated that the presence of benzoyl can exert significant positive effect over improving delayed fluorescence and enhancing EL efficiencies, which can be a feasible design for robust organic luminescent materials.
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Affiliation(s)
- Ruming Jiang
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou510640China
| | - Xing Wu
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou510640China
| | - Hao Liu
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou510640China
| | - Jingjing Guo
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou510640China
| | - Dijia Zou
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou510640China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou510640China
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and DevicesGuangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou510640China
- Shenzhen Institute of Aggregate Science and TechnologySchool of Science and EngineeringThe Chinese University of Hong KongShenzhenGuangdong518172China
- AIE InstituteGuangzhou Development DistrictHuangpuGuangzhou510530China
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58
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Li G, Jiang D, Shan G, Song W, Tong J, Kang D, Hou B, Mu Y, Shao K, Geng Y, Wang XL, Su Z. Organic Supramolecular Zippers with Ultralong Organic Phosphorescence by a Dexter Energy Transfer Mechanism. Angew Chem Int Ed Engl 2021; 61:e202113425. [PMID: 34962678 DOI: 10.1002/anie.202113425] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Indexed: 11/08/2022]
Abstract
Ultralong organic phosphorescence (UOP) materials glow persistently in the dark, which offers new exciting possibilities in the fields of anti-counterfeiting, photoelectric device and biological imaging. However, development of single component UOP materials remains great challenge. Herein, we firstly develop a single component organic supramolecular zipper system with lifetime up to 0.77 s. Owing to introduction of pyrazol ring into diphenylsulfone group, the 'V' shape molecules were artfully self-assembled into supramolecular zippers via π-π and CH•••π interactions, that are not only of significance in highly efficient generation of triplet excitons, but also facilitate Dexter energy transfer process within supramolecular zippers, that are responsible for the alleviating radiative and non-radiative deactivation decay of triplet excitons, to finally boost the UOP. This finding not only gives a new set of guidelines for the design of single component UOP molecules, but also reveals the UOP mechanism from a new perspective.
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Affiliation(s)
- Guangfu Li
- Northeast Normal University, Department of Chemistry, CHINA
| | - Dongjiao Jiang
- Northeast Normal University, Department of Chemistry, CHINA
| | - Guogang Shan
- Northeast Normal University, Department of Chemistry, CHINA
| | - Weilin Song
- Northeast Normal University, Department of Chemistry, CHINA
| | - Jialin Tong
- Northeast Normal University, Department of Chemistry, CHINA
| | - Di Kang
- Northeast Normal University, Department of Chemistry, CHINA
| | - Baoshan Hou
- Northeast Normal University, Department of Chemistry, CHINA
| | - Yingxiao Mu
- Guangdong University of Technology, School of Chemical Engineering and Light Industry, CHINA
| | - Kuizhan Shao
- Northeast Normal University, Department of Chemistry, CHINA
| | - Yun Geng
- Northeast Normal University, Department of Chemistry, CHINA
| | - Xin-Long Wang
- Institute of Functional Material Chemistry, Chemistry, Renmin Street, 130024, Changchun, CHINA
| | - Zhongmin Su
- Northeast Normal University, Department of Chemistry, CHINA
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59
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Khan MFS, Akbar M, Wu J, Xu Z. A review on fluorescence spectroscopic analysis of water and wastewater. Methods Appl Fluoresc 2021; 10. [PMID: 34823232 DOI: 10.1088/2050-6120/ac3d79] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 11/25/2021] [Indexed: 12/30/2022]
Abstract
In recent years, the application of fluorescence spectroscopy has been widely recognized in water environment studies. The sensitiveness, simplicity, and efficiency of fluorescence spectroscopy are proved to be a promising tool for effective monitoring of water and wastewater. The fluorescence excitation-emission matrix (EEMs) and synchronous fluorescence spectra have been widely used analysis techniques of fluorescence measurement. The presence of organic matter in water and wastewater defines the degree and type of pollution in water. The application of fluorescence spectroscopy to characterize dissolved organic matter (DOM) has made the water quality assessment simple and easy. With the recent advances in this technology, components of DOM are identified by employing parallel factor analysis (PARAFAC), a mathematical trilinear data modeling with EEMs. The majority of wastewater studies indicated that the fluorescence peak of EX/EM at 275 nm/340 nm is referred to tryptophan region (Peak T1). However, some researchers identified another fluorescence peak in the region of EX/EM at 225-237 nm/340-381 nm, which described the tryptophan region and labeled it as Peak T2. Generally, peak T is a protein-like component in the water sample, where T1 and T2 signals were derived from the <0.20μm fraction of pollution. Therefore, a more advanced approach, such as an online fluorescence spectrofluorometer, can be used for the online monitoring of water. The results of various waters studied by fluorescence spectroscopy indicate that changes in peak T intensity could be used for real-time wastewater quality assessment and process control of wastewater treatment works. Finally, due to its effective use in water quality assessment, the fluorescence technique is proved to be a surrogate online monitoring tool and early warning equipment.
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Affiliation(s)
- Muhammad Farooq Saleem Khan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, People's Republic of China.,International Faculty of Applied Technology, Yibin City 644000, Sichuan, People's Republic of China.,Research Institute for Environmental Innovation (Suzhou), Tsinghua University, Suzhou 215000, People's Republic of China
| | - Mona Akbar
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, People's Republic of China.,International Faculty of Applied Technology, Yibin City 644000, Sichuan, People's Republic of China
| | - Jing Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, People's Republic of China.,Research Institute for Environmental Innovation (Suzhou), Tsinghua University, Suzhou 215000, People's Republic of China
| | - Zhou Xu
- International Faculty of Applied Technology, Yibin City 644000, Sichuan, People's Republic of China
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60
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Dong C, Wang X, Gong W, Ma W, Zhang M, Li J, Zhang Y, Zhou Z, Yang Z, Qu S, Wang Q, Zhao Z, Yang G, Lv A, Ma H, Chen Q, Shi H, Yang Y(M, An Z. Influence of Isomerism on Radioluminescence of Purely Organic Phosphorescence Scintillators. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109802] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Chaomin Dong
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Xiao Wang
- Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics and Xi'an Institute of Biomedical Materials & Engineering Northwestern Polytechnical University Xi'an 710072 China
| | - Wenqi Gong
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Wenbo Ma
- State Key Laboratory of Modern Optical Instrumentation College of Optical Science and Engineering Zhejiang University Hangzhou Zhejiang 310027 China
| | - Meng Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Jingjie Li
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Yuan Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Zixing Zhou
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Zhijian Yang
- MOE Key Laboratory for Analytical Science of Food Safety and Biology State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University Fuzhou 350002 China
| | - Shuli Qu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Qian Wang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Zhu Zhao
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Guohui Yang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Anqi Lv
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Huili Ma
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Qiushui Chen
- MOE Key Laboratory for Analytical Science of Food Safety and Biology State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University Fuzhou 350002 China
| | - Huifang Shi
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
| | - Yang (Michael) Yang
- State Key Laboratory of Modern Optical Instrumentation College of Optical Science and Engineering Zhejiang University Hangzhou Zhejiang 310027 China
| | - Zhongfu An
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University Nanjing 211800 China
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61
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Jiang X, Tao W, Chen C, Xu G, Zhang H, Wei P. An unexpected non-conjugated AIEgen with a discrete dimer for pure intermolecular through-space charge transfer emission. Chem Sci 2021; 12:15928-15934. [PMID: 35024116 PMCID: PMC8672714 DOI: 10.1039/d1sc05426k] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Accepted: 11/21/2021] [Indexed: 02/06/2023] Open
Abstract
Manipulation of the charge transfer in donor-acceptor-type molecules is essential for the design of controllable aggregate luminescent materials. Apart from the traditional through-bond charge transfer (TBCT) systems which suffer from complicated structural design, poor tunability and low quantum efficiency, through-space charge transfer (TSCT) has been proved as an alternative yet facile strategy in tuning photophysical processes. In this work, by simply changing nucleophilic reaction bases, a traditional conjugated acrylonitrile AP1 and an unexpected non-conjugated AP2 with a carboxamide-functionalized oxirane linker could be obtained. The long-range π-π stacking in conjugated AP1 results in mixed intramolecular TBCT plus intermolecular TSCT emission. However, facilitated by the steric hindrance effect of the big oxirane connector and the unique discrete dimer packing, non-conjugated AP2 exhibits pure and efficient intermolecular TSCT emission in both aggregate and crystalline states. The flexibility of the non-conjugated character further leads to better reversible stimuli-responsiveness to mechanical force for AP2 than for the rigid AP1.
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Affiliation(s)
- Xiujie Jiang
- Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Graphene Engineering Laboratory, Anhui University Hefei China
| | - Wei Tao
- Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Graphene Engineering Laboratory, Anhui University Hefei China
| | - Cheng Chen
- Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Graphene Engineering Laboratory, Anhui University Hefei China
| | - Guoyong Xu
- Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Graphene Engineering Laboratory, Anhui University Hefei China
| | - Haoke Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University Hangzhou China.,ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311215 China .,Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology Guangzhou China
| | - Peifa Wei
- Institutes of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Graphene Engineering Laboratory, Anhui University Hefei China .,Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology Guangzhou China
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62
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Shi Y, Wang K, Zhang S, Fan X, Tsuchiya Y, Lee Y, Dai G, Chen J, Zheng C, Xiong S, Ou X, Yu J, Jie J, Lee C, Adachi C, Zhang X. Characterizing the Conformational Distribution in an Amorphous Film of an Organic Emitter and Its Application in a “Self‐Doping” Organic Light‐Emitting Diode. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yi‐Zhong Shi
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
| | - Kai Wang
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Shao‐Li Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
| | - Xiao‐Chun Fan
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
- JST, ERATO Adachi Molecular Exciton Engineering Project, Fukuoka Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Yi‐Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Gao‐Le Dai
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
| | - Jia‐Xiong Chen
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry City University of Hong Kong Hong Kong SAR P. R. China
| | - Cai‐Jun Zheng
- School of Optoelectronic Information University of Electronic Science and Technology of China (UESTC) Chengdu Sichuan 610054 P. R. China
| | - Shi‐Yun Xiong
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
| | - Xue‐Mei Ou
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
| | - Jia Yu
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
| | - Jian‐Sheng Jie
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
| | - Chun‐Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry City University of Hong Kong Hong Kong SAR P. R. China
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
- JST, ERATO Adachi Molecular Exciton Engineering Project, Fukuoka Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Xiao‐Hong Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Joint International Research Laboratory of Carbon-Based Functional Materials and Devices Soochow University 199 Ren'ai Road Suzhou 215123 Jiangsu PR China
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63
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Shi YZ, Wang K, Zhang SL, Fan XC, Tsuchiya Y, Lee YT, Dai GL, Chen JX, Zheng CJ, Xiong SY, Ou XM, Yu J, Jie JS, Lee CS, Adachi C, Zhang XH. Characterizing the Conformational Distribution in an Amorphous Film of an Organic Emitter and Its Application in a "Self-Doping" Organic Light-Emitting Diode. Angew Chem Int Ed Engl 2021; 60:25878-25883. [PMID: 34585471 DOI: 10.1002/anie.202108943] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Indexed: 11/05/2022]
Abstract
The conformational distribution and mutual interconversion of thermally activated delayed fluorescence (TADF) emitters significantly affect the exciton utilization. However, their influence on the photophysics in amorphous film states is still not known due to the lack of a suitable quantitative analysis method. Herein, we used temperature-dependent time-resolved photoluminescence spectroscopy to quantitatively measure the relative populations of the conformations of a TADF emitter for the first time. We further propose a new concept of "self-doping" for realizing high-efficiency nondoped OLEDs. Interestingly, this "compositionally" pure film actually behaves as a film with a dopant (quasi-equatorial form) in a matrix (quasi-axial form). The concentration-induced quenching that may occur at high concentrations is thus expected to be effectively relieved. The "self-doping" OLED prepared with the newly developed TADF emitter TP2P-PXZ as a neat emitting layer realizes a high maximum external quantum efficiency of 25.4 % and neglectable efficiency roll-off.
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Affiliation(s)
- Yi-Zhong Shi
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Kai Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.,Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Shao-Li Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Xiao-Chun Fan
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.,JST, ERATO Adachi Molecular Exciton Engineering Project, Fukuoka Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.,International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Yi-Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Gao-Le Dai
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Jia-Xiong Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.,Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, Hong Kong SAR, P. R. China
| | - Cai-Jun Zheng
- School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, Sichuan, 610054, P. R. China
| | - Shi-Yun Xiong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Xue-Mei Ou
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Jia Yu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Jian-Sheng Jie
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, Hong Kong SAR, P. R. China
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.,JST, ERATO Adachi Molecular Exciton Engineering Project, Fukuoka Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.,International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Xiao-Hong Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China
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64
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Biswas S, Manna G, Das B, Bhattacharya A, Pal AK, Datta A, Alam P, Laskar IR, Mondal P, Mukhopadhyay MK, Sanyal MK, Acharya S. Origin of Intense Luminescence from Supramolecular 2D Molecular Crystals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2103212. [PMID: 34622549 DOI: 10.1002/smll.202103212] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Luminescence enhancement in 2D molecular crystals (2D crystals) is promising for a variety of optical applications, yet the availability is limited because of unclear mechanism and inefficient design strategy of luminescence control. Herein, the room temperature phosphorescence from micron long molecular thin free-standing 2D crystals of a mono-cyclometalated Ir(III) complex designed at the water surface is reported. A large luminescence enhancement is observed from the 2D crystals at 300 K, which is comparable with the rigidified solution at 77 K suggesting room temperature phosphorescence origin of the luminescence. In situ synchrotron grazing incidence X-ray diffraction measurements determine the constituent centered rectangular unit cells with precise molecular conformation that promotes the formation of 2D crystals. The molecular crystal design leads to a reduced singlet-triplet energy gap (ΔEST ) and mixing of singlet-triplet states by spin-orbit coupling (SOC) for efficient intersystem crossing, which explains the phosphorescence origin at room temperature and luminescence enhancement. The supramolecular assembly process provides an elegant design strategy to realize room temperature phosphorescence from 2D crystals by rigid intermolecular interactions.
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Affiliation(s)
- Sandip Biswas
- School of Applied & Interdisciplinary Sciences (SAIS), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Gouranga Manna
- Surface Physics and Materials Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata, 700064, India
| | - Bidisa Das
- School of Applied & Interdisciplinary Sciences (SAIS), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
- Technical Research Center (TRC), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Arpan Bhattacharya
- Surface Physics and Materials Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata, 700064, India
| | - Arun K Pal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Ayan Datta
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Parvej Alam
- Department of Chemistry, Birla Institute of Technology and Science (BITS), Pilani, Rajasthan, 333031, India
| | - Inamur Rahaman Laskar
- Department of Chemistry, Birla Institute of Technology and Science (BITS), Pilani, Rajasthan, 333031, India
| | - Pramita Mondal
- School of Applied & Interdisciplinary Sciences (SAIS), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Mrinmay K Mukhopadhyay
- Surface Physics and Materials Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata, 700064, India
| | - Milan K Sanyal
- Surface Physics and Materials Science Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata, 700064, India
| | - Somobrata Acharya
- School of Applied & Interdisciplinary Sciences (SAIS), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
- Technical Research Center (TRC), Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
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65
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Liang R, Xiong W, Lo KC, Ho PY, Bai X, Lai W, Chan WK, Du L, Phillips DL. Revealing the Photophysical Dynamics of Selected Rigid Donor-Acceptor Systems: From Ligands to Ruthenium(II) Complexes. J Phys Chem Lett 2021; 12:10927-10935. [PMID: 34734732 DOI: 10.1021/acs.jpclett.1c03122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Newly designed push-pull ligands (L1 and L2) with bithiophene (bth) as a donor and phenazine (phz) or quinoxalino[2,3-b]quinoxaline (qxq) as acceptors were synthesized and also incorporated with a bipyridyl Ru(II) complex to give Ru1 and Ru2, respectively. The ultrafast photophysical dynamics of the ligand and their respective Ru(II) complexes were well-characterized using time-resolved spectroscopies and quantum chemical calculations. Photoinduced charger transfer (CT) and intersystem crossing (ISC) processes were directly observed for L1 and L2. In addition, the interplay of three different triplet excited states was directly observed in the related Ru(II) complexes. The lowest-lying triplet excited states of the ligands and their respective Ru(II) complexes were both attributed to the CT transitions from donor (bth) to acceptor (phz or qxq) and result in 3ICT (intramolecular charge transfer) and 3ILCT (intraligand charge transfer) excited states, respectively. The lifetimes of the lowest-lying triplet excited states of L1, L2, Ru1, and Ru2 were measured to be 21.3, 50.4, 2.75, and 4.16 μs, respectively.
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Affiliation(s)
- Runhui Liang
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, China
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Wenjuan Xiong
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Kin Cheung Lo
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Po Yuen Ho
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Xueqin Bai
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Wenquan Lai
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Wai Kin Chan
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Lili Du
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, China
| | - David Lee Phillips
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
- Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, Hong Kong, China
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66
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Dong C, Wang X, Gong W, Ma W, Zhang M, Li J, Zhang Y, Zhou Z, Yang Z, Qu S, Wang Q, Zhao Z, Yang G, Lv A, Ma H, Chen Q, Shi H, Yang YM, An Z. Influence of Isomerism on Radioluminescence of Purely Organic Phosphorescence Scintillators. Angew Chem Int Ed Engl 2021; 60:27195-27200. [PMID: 34532938 DOI: 10.1002/anie.202109802] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/30/2021] [Indexed: 11/09/2022]
Abstract
There are few reports about purely organic phosphorescence scintillators, and the relationship between molecular structures and radioluminescence in organic scintillators is still unclear. Here, we presented isomerism strategy to study the effect of molecular structures on radioluminescence. The isomers can achieve phosphorescence efficiency of up to 22.8 % by ultraviolet irradiation. Under X-ray irradiation, both m-BA and p-BA show excellent radioluminescence, while o-BA has almost no radioluminescence. Through experimental and theoretical investigation, we found that radioluminescence was not only affected by non-radiation in emissive process, but also highly depended on the material conductivity caused by the different molecular packing. This study not only allows us to clearly understand the relationship between the molecular structures and radioluminescence, but also provides a guidance to rationally design new organic scintillators.
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Affiliation(s)
- Chaomin Dong
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Xiao Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, Xi'an, 710072, China
| | - Wenqi Gong
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Wenbo Ma
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China
| | - Meng Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Jingjie Li
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Yuan Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Zixing Zhou
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Zhijian Yang
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
| | - Shuli Qu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Qian Wang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Zhu Zhao
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Guohui Yang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Anqi Lv
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Huili Ma
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Qiushui Chen
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350002, China
| | - Huifang Shi
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
| | - Yang Michael Yang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China
| | - Zhongfu An
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Nanjing Tech University, Nanjing, 211800, China
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67
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Xu Z, Hean D, Climent C, Casanova D, Wolf MO. Switching between TADF and RTP: anion-regulated photoluminescence in organic salts and co-crystals. MATERIALS ADVANCES 2021; 2:5777-5784. [PMID: 34527950 PMCID: PMC8406714 DOI: 10.1039/d1ma00314c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
Thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) are two photophysical phenomena which utilize triplet excitons. In this work, we demonstrate how variation of the anion in organic salts with carbazole and phenothiazine-5,5-dioxide donors and pyridinium and quinolinium acceptors may be used to switch between TADF and RTP. These compounds adopt similar molecular structures and packing modes with different anions and exhibit different types of photophysical behavior due to the electronic effects of the anions. With bromide anions, the salts exhibit TADF with some RTP. These compounds show fast reverse intersystem crossing and a short delayed lifetime, which is key to application in efficient and robust OLEDs. With BF4 - and PF6 - anions, RTP with long-lived lifetimes and afterglow are observed by eye. This behavior can be utilized for data encryption and anti-counterfeiting applications. Emission wavelengths and lifetimes are also anion-dependent. These results open up an avenue for developing novel luminescent materials through anion tuning and present a molecular model to understand the interplay of RTP and TADF.
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Affiliation(s)
- Zhen Xu
- Department of Chemistry, University of British Columbia 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Duane Hean
- Department of Chemistry, University of British Columbia 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Clàudia Climent
- Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid E-28049 Madrid Spain
| | - David Casanova
- Donostia International Physics Center (DIPC) Paseo Manuel de Lardizabal 4 20018 Donostia Euskadi Spain
- IKERBASQUE, Basque Foundation for Science 48013 Bilbao Euskadi Spain
| | - Michael O Wolf
- Department of Chemistry, University of British Columbia 2036 Main Mall Vancouver BC V6T 1Z1 Canada
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68
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Yan Z, Lin X, Sun S, Ma X, Tian H. Activating Room‐Temperature Phosphorescence of Organic Luminophores via External Heavy‐Atom Effect and Rigidity of Ionic Polymer Matrix**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108025] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zi‐Ang Yan
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science & Technology Meilong Road 130 Shanghai 200237 China
| | - Xiaohan Lin
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science & Technology Meilong Road 130 Shanghai 200237 China
| | - Siyu Sun
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science & Technology Meilong Road 130 Shanghai 200237 China
| | - Xiang Ma
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science & Technology Meilong Road 130 Shanghai 200237 China
| | - He Tian
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science & Technology Meilong Road 130 Shanghai 200237 China
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69
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Yan ZA, Lin X, Sun S, Ma X, Tian H. Activating Room-Temperature Phosphorescence of Organic Luminophores via External Heavy-Atom Effect and Rigidity of Ionic Polymer Matrix*. Angew Chem Int Ed Engl 2021; 60:19735-19739. [PMID: 34240799 DOI: 10.1002/anie.202108025] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Indexed: 12/22/2022]
Abstract
Pure organic room-temperature phosphorescence (RTP) materials have attracted wide attention for their easy preparation, low toxicity, and applications in various fields like bioimaging and anti-counterfeiting. Developing phosphorescent systems with more universality and less difficulty in synthesis has long been the pursuit of materials scientists. By employing a polymeric quaternary ammonium salt with an ionic bonding matrix and heavy atoms, commercial fluorescent dyes are directly endowed with phosphorescence emission. In a single amorphous polymer, the external heavy-atom effect generates excited triplet states and the rigid polymer matrix stabilizes them. This study put forward a new general strategy to design and develop pure organic RTP materials starting from existing library of organic dyes without complicated chemical synthesis.
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Affiliation(s)
- Zi-Ang Yan
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
| | - Xiaohan Lin
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
| | - Siyu Sun
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
| | - Xiang Ma
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
| | - He Tian
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Meilong Road 130, Shanghai, 200237, China
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70
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Hasan N, Ma Z, Liu J, Li Z, Qian C, Liu Y, Chen M, Jiang H, Jia X, Ma Z. Selective Expression of a Carbazole-Phenothiazine Derivative Leads to Dual-mode AIEE, TADF and Distinctive Mechanochromism. Chemphyschem 2021; 22:2093-2098. [PMID: 34318995 DOI: 10.1002/cphc.202100435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/25/2021] [Indexed: 12/11/2022]
Abstract
In this article, we report a newly designed D-A-D' derivative (CNCzPTZ), which displays selective expression of chromophores. This enables CNCzPTZ with solvatochromism, rare dual-mode AIEE properties, solid-state dual-emissions with phosphorescence and distinctive mechanochromism.CNCzPTZ exhibits dual-mode AIEE properties, since the emission band abruptly shifts from 550 nm to 500 nm as the water fraction increases. In the crystalline state, CNCzPTZ demonstrated dual emission bands of 478 nm and 538 nm.CNCzPTZ shows distinctive mechanochromic property in the solid state due to the planarization.
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Affiliation(s)
- Numan Hasan
- Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zhimin Ma
- National high-tech industrial development zone in Jingdezhen, Jingdezhen, 333000, China
| | - Jianwei Liu
- Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Zewei Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and, Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Chen Qian
- Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yan Liu
- Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Mingxing Chen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and, Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Hong Jiang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and, Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xinru Jia
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and, Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Zhiyong Ma
- Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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71
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Wang X, Sun Y, Wang G, Li J, Li X, Zhang K. TADF-Type Organic Afterglow. Angew Chem Int Ed Engl 2021; 60:17138-17147. [PMID: 34060200 DOI: 10.1002/anie.202105628] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/29/2021] [Indexed: 11/05/2022]
Abstract
We report a highly efficient dopant-matrix afterglow system enabled by TADF mechanism to realize afterglow quantum yields of 60-70 %, which features a moderate rate constant for reverse intersystem crossing (kRISC ) to simultaneously improve afterglow quantum yields and maintain afterglow emission lifetime. Difluoroboron β-diketonate (BF2 bdk) compounds are designed with multiple electron-donating groups to possess moderate kRISC values and are selected as luminescent dopants. The matrices with carbonyl functional groups such as phenyl benzoate (PhB) have been found to interact with and perturb BF2 bdk excited states by dipole-dipole interactions and thus enhance the intersystem crossing of BF2 bdk excited states. Through dopant-matrix collaboration, the efficient TADF-type afterglow materials have been achieved to exhibit excellent processability into desired shapes and large-area films by melt casting, as well as aqueous afterglow dispersions for potential bioimaging applications.
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Affiliation(s)
- Xuepu Wang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Yan Sun
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Guangming Wang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Jiuyang Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Xun Li
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Kaka Zhang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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72
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73
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Ren J, Wang Y, Tian Y, Liu Z, Xiao X, Yang J, Fang M, Li Z. Force-Induced Turn-On Persistent Room-Temperature Phosphorescence in Purely Organic Luminogen. Angew Chem Int Ed Engl 2021; 60:12335-12340. [PMID: 33719198 DOI: 10.1002/anie.202101994] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/09/2021] [Indexed: 12/11/2022]
Abstract
Research of purely organic room-temperature phosphorescence (RTP) materials has been a hot topic, especially for those with stimulus response character. Herein, an abnormal stimulus-responsive RTP effect is reported, in which, purely organic luminogen of Czs-ph-3F shows turn-on persistent phosphorescence under grinding. Careful analyses of experimental results, coupled with the theoretical calculations, show that the transition of molecular conformation from quasi-axial to quasi-equatorial of the phenothiazine group should be mainly responsible for this exciting result. Furthermore, the applications of stylus printing and thermal printing are both successfully realized, based on the unique RTP effect of Czs-ph-3F.
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Affiliation(s)
- Jia Ren
- Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China
| | - Yunsheng Wang
- Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China
| | - Yu Tian
- Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China
| | - Zhenjiang Liu
- Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China
| | - Xiangheng Xiao
- School of Physics and Technology, Wuhan University, Wuhan, Hubei, 430072, China
| | - Jie Yang
- Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China
| | - Manman Fang
- Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China
| | - Zhen Li
- Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China.,Department of Chemistry, Wuhan University, Wuhan, Hubei, 430072, China.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, Fujian, 350207, China.,Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin, 300072, China
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74
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Liao Q, Li Q, Li Z. Substituent Effects in Organic Luminogens with Room Temperature Phosphorescence. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100016] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Qiuyan Liao
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Department of Chemistry Wuhan University Wuhan 430072 China
| | - Qianqian Li
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Department of Chemistry Wuhan University Wuhan 430072 China
| | - Zhen Li
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Department of Chemistry Wuhan University Wuhan 430072 China
- Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
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75
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Ding B, Ma L, Huang Z, Ma X, Tian H. Engendering persistent organic room temperature phosphorescence by trace ingredient incorporation. SCIENCE ADVANCES 2021; 7:eabf9668. [PMID: 33962952 PMCID: PMC8104869 DOI: 10.1126/sciadv.abf9668] [Citation(s) in RCA: 77] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 03/19/2021] [Indexed: 05/17/2023]
Abstract
Pure organic persistent room temperature phosphorescence (RTP) has shown great potential in information encryption, optoelectronic devices, and bio-applications. However, trace impurities are generated in synthesis, causing unpredictable effects on the luminescence properties. Here, an impurity is isolated from a pure organic RTP system and structurally characterized that caused an unusual ultralong RTP in matrix even at 0.01 mole percent content. Inspired by this effect, a series of compounds are screened out to form the bicomponent RTP system by the trace ingredient incorporation method. The RTP quantum yields reach as high as 74.2%, and the lifetimes reach up to 430 ms. Flexible application of trace ingredients to construct RTP materials has become an eye-catching strategy with high efficiency, economy, and potential for applications as well as easy preparation.
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Affiliation(s)
- Bingbing Ding
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Liangwei Ma
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Zizhao Huang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Xiang Ma
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - He Tian
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China
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76
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Ren J, Wang Y, Tian Y, Liu Z, Xiao X, Yang J, Fang M, Li Z. Force‐Induced Turn‐On Persistent Room‐Temperature Phosphorescence in Purely Organic Luminogen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101994] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jia Ren
- Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
| | - Yunsheng Wang
- Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
| | - Yu Tian
- Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
| | - Zhenjiang Liu
- Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
| | - Xiangheng Xiao
- School of Physics and Technology Wuhan University Wuhan Hubei 430072 China
| | - Jie Yang
- Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
| | - Manman Fang
- Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
| | - Zhen Li
- Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
- Department of Chemistry Wuhan University Wuhan Hubei 430072 China
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou Fujian 350207 China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry Tianjin University Tianjin 300072 China
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77
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Nandi RP, P CAS, Dhanalakshmi P, Behera SK, Thilagar P. Effect of the Molecular Conformation on Excitation Energy Transfer in Conformationally Constrained Boryl-BODIPY Dyads. Inorg Chem 2021; 60:5452-5462. [PMID: 33830747 DOI: 10.1021/acs.inorgchem.0c02739] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We studied the dual emission characteristics of a series of boryl-BODIPYs (1-6) comprised of triarylborane (TAB) as an energy donor and BODIPY as an energy acceptor. The molecular conformations of dyads 1-6 were systematically tuned by judiciously changing the spacer that bridged the boryl and BODIPY moieties. Frontier molecular orbitals (FMOs) are localized in 3, 4, and 6 with a twisted molecular conformation. In contrast, FMOs are significantly delocalized in 1, 2, and 5 with the least-twisted molecular conformation. Dyads 1-6 showed dual emission features when they were excited at the TAB-dominated absorption band. However, the ratio between the two emission bands in 1-6 significantly varied depending on the molecular conformations. Systematic photoluminescence (PL) studies (both steady-state and time-resolved PL) together with computational, crystal structure, and anion binding studies established that the frustrated excited-state energy transfer from borane to BODIPY is the cause of the dual emission features in these molecular dyads. These studies also revealed that the energy transfer from borane to BODIPY can be elegantly tuned by modulating the dihedral angle between these two moieties.
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Affiliation(s)
- Rajendra Prasad Nandi
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Chinna Ayya Swamy P
- Department of Chemistry, National Institute of Technology Calicut, Kozhikode 673601, India
| | - Pandi Dhanalakshmi
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Santosh Kumar Behera
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Pakkirisamy Thilagar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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78
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Lei Y, Yang J, Dai W, Lan Y, Yang J, Zheng X, Shi J, Tong B, Cai Z, Dong Y. Efficient and organic host-guest room-temperature phosphorescence: tunable triplet-singlet crossing and theoretical calculations for molecular packing. Chem Sci 2021; 12:6518-6525. [PMID: 34040727 PMCID: PMC8132935 DOI: 10.1039/d1sc01175h] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 04/04/2021] [Indexed: 12/14/2022] Open
Abstract
Organic host-guest doped materials exhibiting the room temperature phosphorescence (RTP) phenomenon have attracted considerable attention. However, it is still challenging to investigate their corresponding luminescence mechanism, because for host-guest systems, it is very difficult to obtain single crystals compared to single-component or co-crystal component materials. Herein, we developed a series of organic doped materials with triphenylamine (TPA) as the host and TPA derivatives with different electron-donating groups as guests. The doped materials showed strong fluorescence, thermally activated delayed fluorescence (τ: 39-47 ms), and efficient room temperature phosphorescence (Φ phos: 7.3-9.1%; τ: 170-262 ms). The intensity ratio between the delayed fluorescence and phosphorescence was tuned by the guest species and concentration. Molecular dynamics simulations were used to simulate the molecular conformation of guest molecules in the host matrix and the interaction between the host and guest molecules. Therefore, the photophysical properties were calculated using the QM/MM model. This work provides a new concept for the study of molecular packing of guest molecules in the host matrix.
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Affiliation(s)
- Yunxiang Lei
- School of Chemistry and Materials Engineering, Wenzhou University Wenzhou 325035 P. R. China
| | - Junfang Yang
- Department School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
| | - Wenbo Dai
- School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
| | - Yisha Lan
- School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
| | - Jianhui Yang
- School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
| | - Xiaoyan Zheng
- Department School of Chemistry and Chemical Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
| | - Jianbing Shi
- School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
| | - Bin Tong
- School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
| | - Zhengxu Cai
- School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
| | - Yuping Dong
- School of Materials Science & Engineering, Beijing Institute of Technology Beijing 100081 P. R. China
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79
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Nie X, Su H, Wang T, Miao H, Chen B, Zhang G. Aromatic Electrophilic Directing for Fluorescence and Room-Temperature Phosphorescence Modulation. J Phys Chem Lett 2021; 12:3099-3105. [PMID: 33754734 DOI: 10.1021/acs.jpclett.1c00520] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The ability to modulate luminescence is crucial for organic light-emitting molecules. However, the correlation between molecular structure and emission is not always obvious and systematic. Here, using a well-established empirical rule on electrophilic substitution involving directing groups in organic chemistry, we present a model system, where two luminophores are covalently linked to benzene ortho, meta, and para to each other, to demonstrate that the rule can also be useful in predicting the fluorescence and phosphorescence behaviors of these disubstituted benzene molecules. The benzene ring works as a "molecular wire" that transduces electron density when the two luminophores form ortho- and para-isomers, while little to no transduction can be noted for the meta-isomer, based on well-established organic chemistry. We anticipate that many more "textbook examples" of electronic directing in organic chemistry can be used for systematic modulation of molecular fluorescence and room-temperature phosphorescence.
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Affiliation(s)
- Xiancheng Nie
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Hao Su
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Tao Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Hui Miao
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Biao Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Guoqing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
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80
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Zhou B, Xiao G, Yan D. Boosting Wide-Range Tunable Long-Afterglow in 1D Metal-Organic Halide Micro/Nanocrystals for Space/Time-Resolved Information Photonics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007571. [PMID: 33687769 DOI: 10.1002/adma.202007571] [Citation(s) in RCA: 86] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/14/2021] [Indexed: 06/12/2023]
Abstract
Molecular afterglow materials with ultralong-lived excited states have attracted considerable interest owing to their promise for light-emitting devices, optical imaging, and anti-counterfeiting applications. However, the realization of ultralong afterglow emission in low-dimensional micro/nanostructures has remained an open challenge, limiting progress toward new-generation photonic applications. In this work, new types of mono/binuclear metal-organic halide micro/nanocrystals with tunable afterglow properties, made possibly by the rational control over both ultralong-lived room-temperature phosphorescence and thermally activated delayed fluorescence, are developed. Interestingly, the mono/binuclear coordination complexes present excitation-dependent luminescence across a wide range (wavelength > 150 nm) with broad emission color differences from blue to yellow owing to the multiple long-lived excited states. The 1D binuclear metal-organic microrods further exhibit excitation-dependent optical waveguide and space/time dual-resolved afterglow emission properties, endowing them with great potential in wavelength-division multiplexing information photonics and logic gates. Therefore, this work not only communicates the first example of wide-range tunable ultralong afterglow of low-dimensional metal-organic micro/nanocrystals under ambient conditions but also provides a new route to achieve optical communications and photonic logic compilation at the micro/nanoscale.
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Affiliation(s)
- Bo Zhou
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Guowei Xiao
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Dongpeng Yan
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
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81
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Wu L, Dewhurst RD, Braunschweig H, Lin Z. C–C versus C–H Activation: Understanding How the Carbene π-Accepting Ability Controls the Intramolecular Reactivities of Mono(carbene)-Stabilized Borylenes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00016] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Linlin Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Rian D. Dewhurst
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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82
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Liu H, Xue J, Wang S, Wu F, Zhao Y, Shen Z. Thermal switches between delayed fluorescence and persistent phosphorescence based on a keto-BODIPY electron acceptor. Org Biomol Chem 2021; 19:2030-2037. [PMID: 33595046 DOI: 10.1039/d0ob02390f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new type of twisted donor-acceptor molecular material 3a and 3b containing carbazole as an electron donor and keto-BODIPY bearing keto-isoindolinyl and pyridyl subunits as an acceptor has been prepared and characterized. Chemical modifications at the meso-position of keto-BODIPY with a nitrogen atom and a cyano group enhance the electron withdrawing ability and cause the emission color change from blue to yellow and red. Steady-state absorption and emission spectra of the two compounds show a strong intramolecular charge transfer (ICT) character. Time-resolved emission spectra and transient decay curves of 3a and 3b show efficient delayed fluorescence with a lifetime of 12.64 μs for 3a and 16.59 μs for 3b at room temperature, whereas persistent phosphorescence with a lifetime of 576.65 ms for 3a and 273.76 ms for 3b was obviously detected at 77 K. These photophysical behaviors have been fully revealed via X-ray diffraction analysis and theoretical calculations, and thus attributed to the hybridized local and charge-transfer (HLCT) states and increased spin-orbital coupling (SOC) strength by mixed n → π* and π → π* transitions involving heteroatom lone pairs and the π-conjugated skeleton, respectively.
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Affiliation(s)
- Hui Liu
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, P. R. China.
| | - Jiaying Xue
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, P. R. China.
| | - Sisi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, P. R. China.
| | - Fan Wu
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, P. R. China.
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, P. R. China.
| | - Zhen Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, P. R. China.
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83
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Chen C, Chi Z, Chong KC, Batsanov AS, Yang Z, Mao Z, Yang Z, Liu B. Carbazole isomers induce ultralong organic phosphorescence. NATURE MATERIALS 2021; 20:175-180. [PMID: 32958877 DOI: 10.1038/s41563-020-0797-2] [Citation(s) in RCA: 210] [Impact Index Per Article: 70.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 08/10/2020] [Indexed: 05/23/2023]
Abstract
Commercial carbazole has been widely used to synthesize organic functional materials that have led to recent breakthroughs in ultralong organic phosphorescence1, thermally activated delayed fluorescence2,3, organic luminescent radicals4 and organic semiconductor lasers5. However, the impact of low-concentration isomeric impurities present within commercial batches on the properties of the synthesized molecules requires further analysis. Here, we have synthesized highly pure carbazole and observed that its fluorescence is blueshifted by 54 nm with respect to commercial samples and its room-temperature ultralong phosphorescence almost disappears6. We discover that such differences are due to the presence of a carbazole isomeric impurity in commercial carbazole sources, with concentrations <0.5 mol%. Ten representative carbazole derivatives synthesized from the highly pure carbazole failed to show the ultralong phosphorescence reported in the literature1,7-15. However, the phosphorescence was recovered by adding 0.1 mol% isomers, which act as charge traps. Investigating the role of the isomers may therefore provide alternative insights into the mechanisms behind ultralong organic phosphorescence1,6-18.
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Affiliation(s)
- Chengjian Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore
| | - Zhenguo Chi
- School of Chemistry, Sun Yat-sen University, Guangzhou, China
| | - Kok Chan Chong
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore
| | | | - Zhan Yang
- School of Chemistry, Sun Yat-sen University, Guangzhou, China
| | - Zhu Mao
- School of Chemistry, Sun Yat-sen University, Guangzhou, China
| | - Zhiyong Yang
- School of Chemistry, Sun Yat-sen University, Guangzhou, China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore.
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou, China.
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84
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Higginbotham HF, Okazaki M, de Silva P, Minakata S, Takeda Y, Data P. Heavy-Atom-Free Room-Temperature Phosphorescent Organic Light-Emitting Diodes Enabled by Excited States Engineering. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2899-2907. [PMID: 33404215 DOI: 10.1021/acsami.0c17295] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Room temperature phosphorescence materials offer great opportunities for applications in optoelectronics, due to their unique photophysical characteristics. However, heavy-atom-free organic emitters that can realize distinct electrophosphorescence are rarely exploited. Herein a new approach for designing heavy-atom-free organic room temperature phosphorescence emitters for organic light-emitting diodes is presented. The subtle tuning of the singlet and triplet excited states energies by appropriate choice of host matrix allows tailored emission properties and switching of emission channels between thermally activated delayed fluorescence and room temperature phosphorescence. Moreover, an efficient and heavy-atom-free room temperature phosphorescence organic light-emitting diode using the developed emitter is realized.
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Affiliation(s)
- Heather F Higginbotham
- School of Science, Swinburne University of Technology, Hawthorne, Victoria 3122, Australia
| | - Masato Okazaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Piotr de Silva
- Department of Energy Conversion and Storage, Technical University of Denmark, Anker Engelunds Vej 301, 2800 Kongens Lyngby, Denmark
| | - Satoshi Minakata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Youhei Takeda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Przemyslaw Data
- Faculty of Chemistry, Silesian University of Technology, M. Strzody 9, 44-100 Gliwice, Poland
- Physics Department, Durham University, South Road, Durham DH1 3LE, United Kingdom
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Sklodowskiej 34, 41-819 Zabrze, Poland
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85
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Ge Y, Huang B. Light-emitting analogues based on triphenylamine modified quinoxaline and pyridine[2,3- b]pyrazine exhibiting different mechanochromic luminescence. NEW J CHEM 2021; 45:11304-11312. [DOI: 10.1039/d1nj01350e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
A series of light-emitting analogues show different mechanochromic luminescence properties with emission color changes of 42 and 10 nm.
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Affiliation(s)
- Yuxi Ge
- College of Life Sciences and Chemistry
- Jiangsu Key Laboratory of Biofunctional Molecule, Institute of New Materials for Vehicles
- Jiangsu Second Normal University
- Nanjing
- P. R. China
| | - Bin Huang
- College of Life Sciences and Chemistry
- Jiangsu Key Laboratory of Biofunctional Molecule, Institute of New Materials for Vehicles
- Jiangsu Second Normal University
- Nanjing
- P. R. China
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86
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Hayashi Y, Suzuki N, Maeda T, Fujiwara H, Yagi S. Photophysical properties of 4-(5-methylthiophen-2-yl)pyridinium–cyclic enolate betaine dyes tuned by control of twisted intramolecular transfer. NEW J CHEM 2021. [DOI: 10.1039/d1nj00714a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, thienylpyridinium–cyclic enolate betaine (TPB) dyes were reported as unique skeletons of fluorescent donor–acceptor type molecules.
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Affiliation(s)
- Yuichiro Hayashi
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka Prefecture University
- Osaka 599-8531
- Japan
| | - Naoya Suzuki
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka Prefecture University
- Osaka 599-8531
- Japan
| | - Takeshi Maeda
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka Prefecture University
- Osaka 599-8531
- Japan
| | - Hideki Fujiwara
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Osaka 599-8531
- Japan
| | - Shigeyuki Yagi
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka Prefecture University
- Osaka 599-8531
- Japan
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87
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Kumar AV, Rohullah M, Ravi J, Godumala M, Annadhasan M, Chandrasekar R. Mechanophotonic aspects of a room temperature phosphorescent flexible organic microcrystal. CrystEngComm 2021. [DOI: 10.1039/d1ce00475a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A novel crystal of PTX-2CF3 exhibits room temperature phosphorescence and mechanical flexibility. This flexible crystal efficiently transduces optical emission both in the straight and bent geometries.
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Affiliation(s)
- Avulu Vinod Kumar
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad-500046, India
| | - Mehdi Rohullah
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad-500046, India
| | - Jada Ravi
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad-500046, India
| | - Mallesham Godumala
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad-500046, India
| | - Mari Annadhasan
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad-500046, India
| | - Rajadurai Chandrasekar
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad-500046, India
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88
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Kukhta NA, Bryce MR. Dual emission in purely organic materials for optoelectronic applications. MATERIALS HORIZONS 2021; 8:33-55. [PMID: 34821289 DOI: 10.1039/d0mh01316a] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Purely organic molecules, which emit light by dual emissive (DE) pathways, have received increased attention in the last decade. These materials are now being utilized in practical optoelectronic, sensing and biomedical applications. In order to further extend the application of the DE emitters, it is crucial to gain a fundamental understanding of the links between the molecular structure and the underlying photophysical processes. This review categorizes the types of DE according to the spin multiplicity and time range of the emission, with emphasis on recent experimental advances. The design rules towards novel DE molecular candidates, the most perspective types of DE and possible future applications are outlined. These exciting developments highlight the opportunities for new materials synthesis and pave the way for accelerated future innovation and developments in this area.
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Affiliation(s)
- Nadzeya A Kukhta
- Department of Chemistry, Durham University, Lower Mountjoy, Stockton Road, Durham, DH1 3LE, UK.
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89
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Cao L, Huang S, Liu W, Zhao H, Xiong X, Zhang J, Fu L, Yan X. Thermally Activated Delayed Fluorescence from d 10 -Metal Carbene Complexes through Intermolecular Charge Transfer and Multicolor Emission with a Monomer-Dimer Equilibrium. Chemistry 2020; 26:17222-17229. [PMID: 33006821 PMCID: PMC7839463 DOI: 10.1002/chem.202004106] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Indexed: 11/11/2022]
Abstract
A series of two-coordinate AuI and CuI complexes (3 a, 3 b and 5 a, 5 b) are reported as new organometallic thermally activated delayed fluorescence (TADF) emitters, which are based on the carbene-metal-carbazole model with a pyridine-fused 1,2,3-triazolylidene (PyTz) ligand. PyTz features low steric hindrance and a low-energy LUMO (LUMO=-1.47 eV) located over the π* orbitals of the whole ligand, which facilitates intermolecular charge transfer between a donor (carbazole) and an accepter (PyTz). These compounds exhibit efficient TADF with microsecond lifetimes. Temperature-dependent photoluminescence kinetics of 3 a supports a rather small energy gap between S1 and T1 (ΔES 1 - T 1 =60 meV). Further experiments reveal that there are dual-emission properties from a monomer-dimer equilibrium in solution, exhibiting single-component multicolor emission from blue to orange, including white-light emission.
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Affiliation(s)
- Lei Cao
- Department of ChemistryRenmin University of ChinaBeijing100872P.R. China
| | - Shiqing Huang
- Department of ChemistryRenmin University of ChinaBeijing100872P.R. China
| | - Wei Liu
- Department of ChemistryRenmin University of ChinaBeijing100872P.R. China
| | - Hongyan Zhao
- Department of ChemistryRenmin University of ChinaBeijing100872P.R. China
| | - Xiao‐Gen Xiong
- Sino-French Institute for Nuclear Energy and TechnologySun Yat-sen UniversityGuangzhou510275P.R. China
| | - Jian‐Ping Zhang
- Department of ChemistryRenmin University of ChinaBeijing100872P.R. China
| | - Li‐Min Fu
- Department of ChemistryRenmin University of ChinaBeijing100872P.R. China
| | - Xiaoyu Yan
- Department of ChemistryRenmin University of ChinaBeijing100872P.R. China
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90
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Yuan Z, Zou L, Chang D, Ma X. Conformation-Dependent Phosphorescence of Galactose-Decorated Phosphors and Assembling-Induced Phosphorescence Enhancement. ACS APPLIED MATERIALS & INTERFACES 2020; 12:52059-52069. [PMID: 33166107 DOI: 10.1021/acsami.0c17119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Amorphous organic room-temperature phosphorescent (RTP) materials are promising for their facile preparation and processability, while the conformation effects of phosphors at amorphous state are lack of study in comparison with the rigid effects due to the commonly irregular assembling and dispersal of phosphors in rigid systems. Herein, we report a series of phosphorescent molecules modified by polyhydroxy galactose, whose RTP emission at the amorphous state can be regulated by controlling the conformational distortion of the phosphorescent segments. Further, a strong RTP emission is facilely obtained by the co-assembling between polyhydroxy phosphors and polyhydroxy matrices (α-CD, β-CD, and chitosan). Owing to the rigid effect of the enhanced hydrogen bonding cross-linking, the highest RTP quantum yield reaches 19.4%; whereas, the RTP emissions of assemblies become conformation insensitive. The conflicting relationship between the conformation effect and rigid effect is attributed to the differences between aggregated single-component systems and dispersed assembling systems. Besides, the unique and different moisture responsiveness of the co-assembling samples is discovered and further applied in data encryption. The research expands the scope for designing amorphous pure organic RTP materials with supramolecular strategies and shows a modularized approach for assembling-enhanced phosphorescence.
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Affiliation(s)
- Zhiyi Yuan
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Lei Zou
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Dongdong Chang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xiang Ma
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
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91
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Guo W, Wang X, Zhou B, Zhang K. Achieving Purely-Organic Room-Temperature Aqueous Phosphorescence via a Two-Component Macromolecular Self-Assembly Strategy. Chem Asian J 2020; 15:3469-3474. [PMID: 32909394 DOI: 10.1002/asia.202000965] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/07/2020] [Indexed: 11/11/2022]
Abstract
Manipulation of supramolecular behaviors and aggregation states represents an important topic in devising intriguing photofunctional systems. Here we report a two-component macromolecular self-assembly strategy for achieving aqueous room-temperature phosphorescence (RTP) in purely organic systems. Amphiphilic triblock copolymers are used to modulate the self-assembly of planar RTP molecules in aqueous solution, leading to the formation of sheet-like RTP objects with well-defined morphology, uniform crystalline nanostructures and excellent aqueous dispersity. In contrast, the addition of the planar RTP molecules into aqueous medium only leads to precipitation and quenching of RTP properties. Powder X-ray diffraction and single-crystal X-ray diffraction studies reveal that the amphiphilic triblock copolymers can assist supramolecular columnar packing of the planar RTP molecules where multiple non-covalent interactions stabilize the triplet excited states. Interestingly, it is found that luminescent signals of the sheet-like RTP objects can be extracted from strong fluorescent environments by phosphorescence mode and emission lifetime measurement.
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Affiliation(s)
- Wang Guo
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Xuepu Wang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Bei Zhou
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Kaka Zhang
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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92
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Li Q, Hu J, Lv J, Wang X, Shao S, Wang L, Jing X, Wang F. Through‐Space Charge‐Transfer Polynorbornenes with Fixed and Controllable Spatial Alignment of Donor and Acceptor for High‐Efficiency Blue Thermally Activated Delayed Fluorescence. Angew Chem Int Ed Engl 2020; 59:20174-20182. [DOI: 10.1002/anie.202008912] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Qiang Li
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Jun Hu
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Jianhong Lv
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
| | - Xingdong Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
| | - Shiyang Shao
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
| | - Lixiang Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Xiabin Jing
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
| | - Fosong Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
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93
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Li Q, Hu J, Lv J, Wang X, Shao S, Wang L, Jing X, Wang F. Through‐Space Charge‐Transfer Polynorbornenes with Fixed and Controllable Spatial Alignment of Donor and Acceptor for High‐Efficiency Blue Thermally Activated Delayed Fluorescence. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008912] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Qiang Li
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Jun Hu
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Jianhong Lv
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
| | - Xingdong Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
| | - Shiyang Shao
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
| | - Lixiang Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
- School of Applied Chemistry and Engineering University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Xiabin Jing
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
| | - Fosong Wang
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 P. R. China
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94
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Lei Y, Dai W, Guan J, Guo S, Ren F, Zhou Y, Shi J, Tong B, Cai Z, Zheng J, Dong Y. Wide‐Range Color‐Tunable Organic Phosphorescence Materials for Printable and Writable Security Inks. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003585] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yunxiang Lei
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
| | - Wenbo Dai
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
| | - Jianxin Guan
- Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Shuai Guo
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
| | - Fei Ren
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
| | - Yudai Zhou
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
| | - Jianbing Shi
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
| | - Bin Tong
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
| | - Zhengxu Cai
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
| | - Junrong Zheng
- Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Yuping Dong
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China
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95
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Lei Y, Dai W, Guan J, Guo S, Ren F, Zhou Y, Shi J, Tong B, Cai Z, Zheng J, Dong Y. Wide-Range Color-Tunable Organic Phosphorescence Materials for Printable and Writable Security Inks. Angew Chem Int Ed Engl 2020; 59:16054-16060. [PMID: 32500576 DOI: 10.1002/anie.202003585] [Citation(s) in RCA: 176] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Indexed: 12/25/2022]
Abstract
Organic materials with long-lived, color-tunable phosphorescence are potentially useful for optical recording, anti-counterfeiting, and bioimaging. Herein, we develop a series of novel host-guest organic phosphors allowing dynamic color tuning from the cyan (502 nm) to orange red (608 nm). Guest materials are employed to tune the phosphorescent color, while the host materials interact with the guest to activate the phosphorescence emission. These organic phosphors have an ultra-long lifetime of 0.7 s and a maximum phosphorescence efficiency of 18.2 %. Although color-tunable inks have already been developed using visible dyes, solution-processed security inks that are temperature dependent and display time-resolved printed images are unprecedented. This strategy can provide a crucial step towards the next-generation of security technologies for information handling.
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Affiliation(s)
- Yunxiang Lei
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Wenbo Dai
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Jianxin Guan
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Shuai Guo
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Fei Ren
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Yudai Zhou
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Jianbing Shi
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Bin Tong
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Zhengxu Cai
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Junrong Zheng
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Yuping Dong
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing, 100081, China
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96
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Jena S, Dhanalakshmi P, Bano G, Thilagar P. Delayed Fluorescence, Room Temperature Phosphorescence, and Mechanofluorochromic Naphthalimides: Differential Imaging of Normoxia and Hypoxia Live Cancer Cells. J Phys Chem B 2020; 124:5393-5406. [PMID: 32501697 DOI: 10.1021/acs.jpcb.0c04115] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We study the effect of molecular conformation on the electronic coupling between the donor amines and acceptor 1,8-naphthalimide (NPI) in a series of D-A systems 1-4 (A = NPI; D = phenothiazine, phenoxazine, carbazole, diphenylamine, respectively, for 1, 2, 3, and 4). Weakly coupled systems show dual emission in the solution state, while strongly coupled systems show single emission bands. The energy of transitions and photoluminescence (PL) quantum yield are sensitive to the molecular conformation and donor strength. These compounds show delayed emission in the solutions and aggregated state and phosphorescence in the solid state. Compounds 3 and 4 with weak donors exhibit intermolecular slipped π···π interactions in the solid state and consequently exhibit dual (intra- and inter-) phosphorescence at low temperature. Steady state and time-resolved PL studies at variable temperature together with computational and crystal structure analysis were used to rationalize the optical properties of these compounds. The delayed emission of these compounds is sensitive to molecular oxygen; accordingly, these molecules are utilized for differential imaging of normoxia and hypoxia cancer cells.
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Affiliation(s)
- Satyam Jena
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India 560012
| | - Pandi Dhanalakshmi
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India 560012
| | - Gulista Bano
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India 560012
| | - Pakkirisamy Thilagar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India 560012
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97
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Feng B, Yang Y, You J. A methylation platform of unconventional inert aryl electrophiles: trimethylboroxine as a universal methylating reagent. Chem Sci 2020; 11:6031-6035. [PMID: 34094095 PMCID: PMC8159405 DOI: 10.1039/d0sc01641a] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Methylation is one of the most fundamental conversions in medicinal and material chemistry. Extension of substrate types from aromatic halides to other unconventional aromatic electrophiles is a highly important yet challenging task in catalytic methylation. Disclosed herein is a series of transition metal-catalyzed methylations of unconventional inert aryl electrophiles using trimethylboroxine (TMB) as the methylating reagent. This transformation features a broad substrate type, including nitroarenes, benzoic amides, benzoic esters, aryl cyanides, phenol ethers, aryl pivalates and aryl fluorides. Another important merit of this work is that these widespread “inert” functionalities are capable of serving as directing or activating groups for selective functionalization of aromatic rings before methylation, which greatly expands the connotation of methylation chemistry. A universal platform for catalytic methylation of a series of unconventional inert aryl electrophiles with trimethylboroxine (TMB) is established, which provides a synthetic chemist's toolbox for the construction of methylated arenes.![]()
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Affiliation(s)
- Boya Feng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Yudong Yang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University 29 Wangjiang Road Chengdu 610064 P. R. China
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98
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Sequential determination of cerium (IV) ion and ascorbic acid via a novel organic framework: A subtle interplay between intramolecular charge transfer (ICT) and aggregated-induced-emission (AIE). J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112705] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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99
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Li B, Li Z, Guo F, Song J, Jiang X, Wang Y, Gao S, Wang J, Pang X, Zhao L, Zhang Y. Realizing Efficient Single Organic Molecular White Light-Emitting Diodes from Conformational Isomerization of Quinazoline-Based Emitters. ACS APPLIED MATERIALS & INTERFACES 2020; 12:14233-14243. [PMID: 32103662 DOI: 10.1021/acsami.9b20162] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Single pure organic molecular white light emitters (SPOMWLEs) are of significance as a new class of material for white lighting applications; however, few of them are able to emit white electroluminescence from organic light-emitting diodes. Herein, donor-π-acceptor conjugated emitters, 2PQ-PTZ and 4PQ-PTZ, were designed and synthesized as SPOMWLEs for white light emission considering the distinct advantages of their conformation isomers. The coexistence of conformational isomers in 2PQ-PTZ, which is the first experimental evidence of the coexisting quasi-axial and quasi-equatorial conformers, provides ideal flexibility to obtain white light emission from their simultaneous and well-separated fluorescence and thermally activated delayed fluorescence. With these remarkable properties, a 2PQ-PTZ-based white light-emitting diode (LED) with a CIE of (0.32, 0.34) and color rendering index (CRI) of 89 is demonstrated. Further, the white organic light-emitting diode (OLED) of 2PQ-PTZ exhibits a high external quantum efficiency (EQE) of 10.1%, which is the reported highest performance among SPOMWLE-based OLEDs.
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Affiliation(s)
- Bowen Li
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Zhiyi Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fengyun Guo
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jinsheng Song
- Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China
| | - Xi Jiang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Ying Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shiyong Gao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jinzhong Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Xinchang Pang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 45001, China
| | - Liancheng Zhao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yong Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 45001, China
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Shang C, Wang G, Liu K, Jiang Q, Liu F, Chou PT, Fang Y. Perylene Bisimide and Naphthyl-Based Molecular Dyads: Hydrogen Bonds Driving Co-planarization and Anomalous Temperature-Response Fluorescence. Angew Chem Int Ed Engl 2020; 59:8579-8585. [PMID: 32080956 DOI: 10.1002/anie.201914070] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/30/2020] [Indexed: 12/22/2022]
Abstract
The origin of the positive temperature effect in fluorescence emission of a newly designed perylene bisimide (PBI) derivative with two naphthyl units containing ortho-methoxy group (NM) at its bay positions (PBI-2NM) was elucidated. A key point is the finding of a weak hydrogen bond (<5.0 kcal mol-1 ) between the methoxy group of the NM unit and a nearby hydrogen atom of the PBI core. It is the bonding that drives co-planarization of the different aromatic units, resulting in delocalization of the π-electrons of the compound as synthesized, inducing fluorescence quenching via intramolecular charge transfer (ICT). With increasing temperature, the co-planar structure could be distorted in part, resulting in a decreased degree of ICT, and hence leading to enhanced fluorescence emission. The unique positive temperature effect in emission induced by H-bond-driven co-planarization may pave a new avenue in designing functional molecular systems complementary to conventional methods.
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Affiliation(s)
- Congdi Shang
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Gang Wang
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Ke Liu
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Qingwei Jiang
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Fengyi Liu
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
| | - Pi-Tai Chou
- Department of Chemistry, National (Taiwan) University, Taipei, 10617, Taiwan R.O.C
| | - Yu Fang
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, P. R. China
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