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Zheng GS, Shen CL, Niu CY, Lou Q, Jiang TC, Li PF, Shi XJ, Song RW, Deng Y, Lv CF, Liu KK, Zang JH, Cheng Z, Dong L, Shan CX. Photooxidation triggered ultralong afterglow in carbon nanodots. Nat Commun 2024; 15:2365. [PMID: 38491012 PMCID: PMC10943204 DOI: 10.1038/s41467-024-46668-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 03/06/2024] [Indexed: 03/18/2024] Open
Abstract
It remains a challenge to obtain biocompatible afterglow materials with long emission wavelengths, durable lifetimes, and good water solubility. Herein we develop a photooxidation strategy to construct near-infrared afterglow carbon nanodots with an extra-long lifetime of up to 5.9 h, comparable to that of the well-known rare-earth or organic long-persistent luminescent materials. Intriguingly, size-dependent afterglow lifetime evolution from 3.4 to 5.9 h has been observed from the carbon nanodots systems in aqueous solution. With structural/ultrafast dynamics analysis and density functional theory simulations, we reveal that the persistent luminescence in carbon nanodots is activated by a photooxidation-induced dioxetane intermediate, which can slowly release and convert energy into luminous emission via the steric hindrance effect of nanoparticles. With the persistent near-infrared luminescence, tissue penetration depth of 20 mm can be achieved. Thanks to the high signal-to-background ratio, biological safety and cancer-specific targeting ability of carbon nanodots, ultralong-afterglow guided surgery has been successfully performed on mice model to remove tumor tissues accurately, demonstrating potential clinical applications. These results may facilitate the development of long-lasting luminescent materials for precision tumor resection.
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Affiliation(s)
- Guang-Song Zheng
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Cheng-Long Shen
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Chun-Yao Niu
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Qing Lou
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China.
| | - Tian-Ci Jiang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
- Henan Key Laboratory for Pharmacology of Liver Diseases, Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450052, China
| | - Peng-Fei Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
- Henan Key Laboratory for Pharmacology of Liver Diseases, Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450052, China
| | - Xiao-Jing Shi
- Academy of Medical Sciences, Zhengzhou University, Zhengzhou, 450052, China
| | - Run-Wei Song
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Yuan Deng
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Chao-Fan Lv
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Kai-Kai Liu
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Jin-Hao Zang
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Zhe Cheng
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
- Henan Key Laboratory for Pharmacology of Liver Diseases, Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450052, China
| | - Lin Dong
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China
| | - Chong-Xin Shan
- Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Material Physics, Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, China.
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2
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Kumar K, Thakur D. Overview of imidazole-based fluorescent materials with hybridized local and charge transfer and hot-exciton pathway characteristics in excited states. SOFT MATTER 2024; 20:1669-1688. [PMID: 38315555 DOI: 10.1039/d3sm01005h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Herein, we discuss an imidazole-based molecular framework, which can successfully transform triplet excitons present in high triplet levels into singlet states. We explain the working mechanisms of different methods for collecting triplet excitons, including hot excitons or HLCT states. After the development of an hot exciton material by Ma and Yang, many studies have demonstrated that the organic conjugated molecules having imidazole core have possibilities to show high efficiencies via hot exciton pathways. Finally, we provide a detailed investigation of recently published hot exciton luminogens based on imidazole molecular frameworks. This review provides an overview of the molecular structures, frontier molecular orbital information, and glass transition temperature of developed luminogens as well as the efficiency of organic light-emitting diodes (OLED) devices.
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Affiliation(s)
- Krishan Kumar
- School of Chemical Sciences, IIT Mandi, Himachal Pradesh 175005, India.
| | - Diksha Thakur
- School of Chemical Sciences, IIT Mandi, Himachal Pradesh 175005, India.
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3
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Siddiqui I, Kumar S, Tsai YF, Gautam P, Shahnawaz, Kesavan K, Lin JT, Khai L, Chou KH, Choudhury A, Grigalevicius S, Jou JH. Status and Challenges of Blue OLEDs: A Review. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2521. [PMID: 37764550 PMCID: PMC10536903 DOI: 10.3390/nano13182521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023]
Abstract
Organic light-emitting diodes (OLEDs) have outperformed conventional display technologies in smartphones, smartwatches, tablets, and televisions while gradually growing to cover a sizable fraction of the solid-state lighting industry. Blue emission is a crucial chromatic component for realizing high-quality red, green, blue, and yellow (RGBY) and RGB white display technologies and solid-state lighting sources. For consumer products with desirable lifetimes and efficiency, deep blue emissions with much higher power efficiency and operation time are necessary prerequisites. This article reviews over 700 papers covering various factors, namely, the crucial role of blue emission for full-color displays and solid-state lighting, the performance status of blue OLEDs, and the systematic development of fluorescent, phosphorescent, and thermally activated delayed fluorescence blue emitters. In addition, various challenges concerning deep blue efficiency, lifetime, and approaches to realizing deeper blue emission and higher efficacy for blue OLED devices are also described.
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Affiliation(s)
- Iram Siddiqui
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Sudhir Kumar
- Institute for Chemical and Bioengineering, ETH Zürich, 8093 Zürich, Switzerland
| | - Yi-Fang Tsai
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Prakalp Gautam
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shahnawaz
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Kiran Kesavan
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Jin-Ting Lin
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Luke Khai
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Kuo-Hsien Chou
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Abhijeet Choudhury
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Saulius Grigalevicius
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, LT-50254 Kaunas, Lithuania
| | - Jwo-Huei Jou
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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4
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Zhao Z, Luo Q, Chu S, Wen Q, Yu Z, Xu J, Xu W, Yi M. Preparation and in vivo imaging of NIR-emissive carbonized polymer dots derived from biomass olive leaves with a quantum yield of 71.4. RSC Adv 2023; 13:15182-15189. [PMID: 37213343 PMCID: PMC10193381 DOI: 10.1039/d3ra01378b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 04/27/2023] [Indexed: 05/23/2023] Open
Abstract
The conversion of biomass materials into high value-added chemicals is receiving more and more attention. Herein, biomass olive leaves are converted into carbonized polymer dots (CPDs) through a simple hydrothermal reaction. The CPDs show near infrared light emission properties, and the absolute quantum yield reaches a record breaking value of 71.4% under the excitation wavelength of 413 nm. Detailed characterization determines that CPDs only contain three elements: carbon, hydrogen and oxygen, which is very different from most carbon dots which contain nitrogen atoms. Subsequently, NIR fluorescence imaging both in vitro and in vivo is performed to test their feasibility as fluorescence probes. The metabolic pathways of CPDs in the living body are inferred by studying the bio-distribution of CPDs in major organs. Their outstanding advantage is expected to further broaden the application field of this material.
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Affiliation(s)
- Zhiqiang Zhao
- Department of Basic Medical Sciences, Medical College of Taizhou University Taizhou 318000 Zhejiang China
| | - Qin Luo
- Department of Laboratory Medicine, The Tenth Affiliated Hospital of Southern Medical University (Dongguan People's Hospital) Dongguan 523018 China
| | - Shengjing Chu
- College of Science, Gansu Agricultural University Lanzhou 730000 China
| | - Qinghui Wen
- Department of Laboratory Medicine, The Tenth Affiliated Hospital of Southern Medical University (Dongguan People's Hospital) Dongguan 523018 China
| | - Zhiqiang Yu
- Department of Laboratory Medicine, The Tenth Affiliated Hospital of Southern Medical University (Dongguan People's Hospital) Dongguan 523018 China
| | - Jijun Xu
- Gansu Institute for Drug Control Lanzhou 730070 China
| | - Weibing Xu
- College of Science, Gansu Agricultural University Lanzhou 730000 China
| | - Muhua Yi
- Department of Pathology, The Tenth Affiliated Hospital of Southern Medical University (Dongguan People's Hospital) Dongguan 523018 China
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5
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Gautam P, Shahnawaz, Siddiqui I, Blazevicius D, Krucaite G, Tavgeniene D, Jou JH, Grigalevicius S. Bifunctional Bicarbazole-Benzophenone-Based Twisted Donor-Acceptor-Donor Derivatives for Deep-Blue and Green OLEDs. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1408. [PMID: 37110993 PMCID: PMC10146648 DOI: 10.3390/nano13081408] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 04/07/2023] [Accepted: 04/15/2023] [Indexed: 08/27/2023]
Abstract
Organic light-emitting diodes (OLEDs) have played a vital role in showing tremendous technological advancements for a better lifestyle, due to their display and lighting technologies in smartphones, tablets, television, and automotive industries. Undoubtedly, OLED is a mainstream technology and, inspired by its advancements, we have designed and synthesized the bicarbazole-benzophenone-based twisted donor-acceptor-donor (D-A-D) derivatives, namely DB13, DB24, DB34, and DB43, as bi-functional materials. These materials possess high decomposition temperatures (>360 °C) and glass transition temperatures (~125 °C), a high photoluminescence quantum yield (>60%), wide bandgap (>3.2 eV), and short decay time. Owing to their properties, the materials were utilized as blue emitters as well as host materials for deep-blue and green OLEDs, respectively. In terms of the blue OLEDs, the emitter DB13-based device outperformed others by showing a maximum EQE of 4.0%, which is close to the theoretical limit of fluorescent materials for a deep-blue emission (CIEy = 0.09). The same material also displayed a maximum power efficacy of 45 lm/W as a host material doped with a phosphorescent emitter Ir(ppy)3. Furthermore, the materials were also utilized as hosts with a TADF green emitter (4CzIPN) and the device based on DB34 displayed a maximum EQE of 11%, which may be attributed to the high quantum yield (69%) of the host DB34. Therefore, the bi-functional materials that are easily synthesized, economical, and possess excellent characteristics are expected to be useful in various cost-effective and high-performance OLED applications, especially in displays.
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Affiliation(s)
- Prakalp Gautam
- Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2, Guangfu Rd., East District, Hsinchu 30013, Taiwan
| | - Shahnawaz
- Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2, Guangfu Rd., East District, Hsinchu 30013, Taiwan
| | - Iram Siddiqui
- Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2, Guangfu Rd., East District, Hsinchu 30013, Taiwan
| | - Dovydas Blazevicius
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, LT50254 Kaunas, Lithuania
| | - Gintare Krucaite
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, LT50254 Kaunas, Lithuania
| | - Daiva Tavgeniene
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, LT50254 Kaunas, Lithuania
| | - Jwo-Huei Jou
- Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2, Guangfu Rd., East District, Hsinchu 30013, Taiwan
| | - Saulius Grigalevicius
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, LT50254 Kaunas, Lithuania
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Lian M, Ye Z, Mu Y, Hu D, Liu Y, Zhang H, Ji S, Huo Y. Progress on Blue-Emitting Hot Exciton Materials. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202207042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
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7
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Zhou Y, Yang Z, Qiu Z, Tang N, Sun D, Liu B, Wu X, Ji S, Chen WC, Huo Y. New donor–π–acceptor AIEgens: Influence of π bridge on luminescence properties and electroluminescence application. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113891] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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8
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Li W, Gong Q, Guo X, Wu Q, Chang F, Wang H, Zhang F, Hao E, Jiao L. Synthesis, Reactivity, and Properties of a Class of π-Extended BODIPY Derivatives. J Org Chem 2021; 86:17110-17118. [PMID: 34748343 DOI: 10.1021/acs.joc.1c02216] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A new family of π-extended BODIPY derivatives were obtained through the condensation of aldehyde and pyrrole in aqueous solution in the presence of HCl. The new rigid π-framework extends beyond the dipyrromethene unit, which is significantly different from classical BODIPYs in the electronic configuration. Both π-extended BODIPYs displayed intense absorption and moderate emission with maxima around 565 and 620 nm, respectively, and showed interesting reactivity toward various nucleophiles. Moreover, these π-extended BODIPYs were developed as fluorescent probes for rapid and selective detection of GSH and were successfully applied for live-cell imaging.
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Affiliation(s)
- Wanwan Li
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Qingbao Gong
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Xing Guo
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Qinghua Wu
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Fei Chang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Hua Wang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Fan Zhang
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Erhong Hao
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Lijuan Jiao
- The Key Laboratory of Functional Molecular Solids, Ministry of Education; School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
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9
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Zheng XH, Huang TT, Yang GX, Lin AQ, Chen K, Chen X, Li JY, Tong QX. Constructing Highly Efficient Blue OLEDs with External Quantum Efficiencies up to 7.5 % Based on Anthracene Derivatives. Chemistry 2021; 27:16181-16188. [PMID: 34554619 DOI: 10.1002/chem.202103012] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Indexed: 11/08/2022]
Abstract
Acquiring desirable device performance with deep-blue color purity that fulfills practical application requirements is still a challenge. Bipolar fluorescent emitters with hybrid local and charge transfer (HLCT) state may serve to address this issue. Herein, by inserting anthracene core in the deep-blue building blocks, the authors successfully developed two highly twisted D-π-A fluorescent emitters, ICz-An-PPI and IP-An-PPI, featuring different acceptor groups. Both exhibited superb thermal stabilities, high photo luminescent quantum yields and excellent bipolar transport capabilities. The non-doped OLEDs using ICz-An-PPI and IP-An-PPI as the emitting layers showed efficient blue emission with an external quantum efficiency (EQEmax ) of 4.32 % and 5.41 %, and the CIE coordinates of (0.147, 0.180) and (0.149, 0.150), respectively. In addition, the deep blue doped device based on ICz-An-PPI was achieved with an excellent CEmax of 5.83 cd A-1 , EQEmax of 4.6 % and the CIE coordinate of (0.148, 0.078), which is extremely close to the National Television Standards Committee (NTSC) standard. Particularly, IP-An-PPI-based doped device had better performance, with an EQEmax of 7.51 % and the CIE coordinate of (0.150, 0.118), which was very impressive among the recently reported deep-blue OLEDs with the CIEy <0.12. Such high performance may be attributed to the hot exciton HLCT mechanism via T7 to S2 . Our work may provide a new approach for designing high-efficiency deep-blue materials.
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Affiliation(s)
- Xu-Hui Zheng
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered, Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China.,Department of Chemistry, Guangdong Technion Israel Institute of Technology, Shantou, 515063, China
| | - Ting-Ting Huang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Guo-Xi Yang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered, Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - An-Qi Lin
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered, Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Keng Chen
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered, Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Xiang Chen
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered, Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Jiu-Yan Li
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, China
| | - Qing-Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered, Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
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10
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Mayder DM, Tonge CM, Nguyen GD, Tran MV, Tom G, Darwish GH, Gupta R, Lix K, Kamal S, Algar WR, Burke SA, Hudson ZM. Polymer Dots with Enhanced Photostability, Quantum Yield, and Two-Photon Cross-Section using Structurally Constrained Deep-Blue Fluorophores. J Am Chem Soc 2021; 143:16976-16992. [PMID: 34618454 DOI: 10.1021/jacs.1c06094] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Semiconducting polymer dots (Pdots) have emerged as versatile probes for bioanalysis and imaging at the single-particle level. Despite their utility in multiplexed analysis, deep blue Pdots remain rare due to their need for high-energy excitation and sensitivity to photobleaching. Here, we describe the design of deep blue fluorophores using structural constraints to improve resistance to photobleaching, two-photon absorption cross sections, and fluorescence quantum yields using the hexamethylazatriangulene motif. Scanning tunneling microscopy was used to characterize the electronic structure of these chromophores on the atomic scale as well as their intrinsic stability. The most promising fluorophore was functionalized with a polymerizable acrylate handle and used to give deep-blue fluorescent acrylic polymers with Mn > 18 kDa and Đ < 1.2. Nanoprecipitation with amphiphilic polystyrene-graft-(carboxylate-terminated poly(ethylene glycol)) gave water-soluble Pdots with blue fluorescence, quantum yields of 0.81, and molar absorption coefficients of (4 ± 2) × 108 M-1 cm-1. This high brightness facilitated single-particle visualization with dramatically improved signal-to-noise ratio and photobleaching resistance versus an unencapsulated dye. The Pdots were then conjugated with antibodies for immunolabeling of SK-BR3 human breast cancer cells, which were imaged using deep blue fluorescence in both one- and two-photon excitation modes.
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Affiliation(s)
- Don M Mayder
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Christopher M Tonge
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Giang D Nguyen
- Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Michael V Tran
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Gary Tom
- Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Ghinwa H Darwish
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Rupsa Gupta
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Kelsi Lix
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Saeid Kamal
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - W Russ Algar
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
| | - Sarah A Burke
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada.,Department of Physics and Astronomy, The University of British Columbia, 6224 Agricultural Road, Vancouver V6T 1Z1, British Columbia, Canada.,Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver V6T 1Z4, British Columbia, Canada
| | - Zachary M Hudson
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver V6T 1Z1, British Columbia, Canada
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Abstract
Near ultraviolet (NUV) light-emitting materials and devices are significant due to unique applications in anti-counterfeit, manufacturing industries, and hygienic treatments. However, the development of high-efficiency NUV electroluminescent devices encounters great challenges and is far behind their RGB emitter counterparts. Besides the photoluminescence quantum yields (PLQYs) of NUV materials being higher than 40%, charge injection and lopsided carrier transport also determine the device performance, leading to great efforts in optimizing the frontier molecular orbitals to fit the adjacent function layer. In the exploration of NUV materials, organic molecules are one of the primary candidates, given their preparative facility and structural variability. Recently, all-inorganic quantum-dot light-emitting diodes (QLEDs) of Cd-based, ZnSe, graphene and inorganic perovskite emitters and organic-inorganic hybrid lead halide perovskite nanocrystals (NCs) were demonstrated for achieving NUV electroluminescence. Owing to the great efforts devoted to NUV material engineering and device configuration, NUV materials and devices have achieved great advances over the last two decades. In this review, we retrospect the development of NUV materials and devices covering all promising systems, which may inspire the enthusiasm of researchers to explore the huge potential in the NUV region.
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Affiliation(s)
- Shuo Chen
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, 74 Xuefu Road, Harbin 150080, P. R. China.
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12
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Tang SS, Yang GX, Zhu JJ, He X, Jian JX, Lu F, Tong QX. Multifunctional Materials Serving as Efficient Non-Doped Violet-Blue Emitters and Host Materials for Phosphorescence. Chemistry 2021; 27:9102-9111. [PMID: 33871880 DOI: 10.1002/chem.202100717] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Indexed: 11/10/2022]
Abstract
Efficient multifunctional materials acting as violet-blue emitters, as well as host materials for phosphorescent OLEDs, are crucial but rare due to demand that they should have high first singlet state (S1 ) energy and first triplet state (T1 ) energy simultaneously. In this study, two new violet-blue bipolar fluorophores, TPA-PI-SBF and SBF-PI-SBF, were designed and synthesized by introducing the hole transporting moiety triphenylamine (TPA) and spirobifluorene (SBF) unit that has high T1 into high deep blue emission quantum yield group phenanthroimidazole (PI). As the results, the non-doped OLEDs based on TPA-PI-SBF exhibited excellent EL performance with a maximum external quantum efficiency (EQEmax ) of 6.76 % and a violet-blue emission with Commission Internationale de L'Eclairage (CIE) of (0.152, 0.059). The device based on SBF-PI-SBF displayed EQEmax of 6.19 % with CIE of (0.159, 0.049), which nearly matches the CIE coordinates of the violet-blue emitters standard of (0.131, 0.046). These EL performances are comparable to the best reported non-doped deep or violet-blue emissive OLEDs with CIEy<0.06 in recent years. Additionally, the green, yellow and red phosphorescent OLEDs with TPA-PI-SBF and SBF-PI-SBF as host materials achieved a high EQEmax of about 20 % and low efficiency roll-off at the ultra-high luminance of 10 000 cd m-2 . These results provided a new construction strategy for designing high-performance violet-blue emitters, as well as efficient host materials for phosphorescent OLEDs.
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Affiliation(s)
- Shan-Shun Tang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P.R. China
| | - Guo-Xi Yang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P.R. China
| | - Jie-Ji Zhu
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P.R. China
| | - Xin He
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P.R. China
| | - Jing-Xin Jian
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P.R. China
| | - Feng Lu
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P.R. China
| | - Qing-Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P.R. China
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A sterically shielded design on anthracene-based emitters for efficient deep-blue organic light-emitting diodes. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Patil VV, Lim J, Lee JY. Strategic Synchronization of 7,7-Dimethyl-5,7-dihydroindeno[2,1- b]carbazole for Narrow-Band, Pure Violet Organic Light-Emitting Diodes with an Efficiency of > 5% and a CIE y Coordinate of < 0.03. ACS APPLIED MATERIALS & INTERFACES 2021; 13:14440-14446. [PMID: 33749250 DOI: 10.1021/acsami.1c02635] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A novel violet emitter, 1,3-bis[10,10-dimethyl-10H-indeno[2,1-b]]indolo[3,2,1-jk]indolo[1',2',3':1,7]indolo[3,2-b]carbazole (m-FLDID), was designed and synthesized by meta-oriented bis-fusion of two 7,7-dimethyl-5,7-dihydroindeno[2,1-b]carbazole (DMID) subunits for use in a pure violet organic light-emitting diode (OLED). Incorporation of the DMID subunits effectively reduced the nonradiative recombination rate, improving the photoluminescence quantum yield of the m-FLDID emitter. The meta-oriented bis-fusion of the two DMID subunits not only triggered an alternative distribution of the frontier orbitals but also effectively locked the π-conjugation chain, which ultimately resulted in a narrow-band, pure violet emission of the m-FLDID emitter. Doped m-FLDID devices possessed an external quantum efficiency (EQE) of > 5%, pure violet emission with a maximum at 407 nm, a narrow full width at half-maximum of 17 nm, and a Commission Internationale de l'éclairage y coordinate of less than 0.03. This is the first work reporting an EQE of > 5% and an extremely narrow emission spectrum for a pure violet emitter.
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Affiliation(s)
- Vilas Venunath Patil
- School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea
| | - Junseop Lim
- School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea
| | - Jun Yeob Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Korea
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15
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Yang S, Cao C, Islam A, Sun S, Deng Z, Li J, Ni S, Tong QX, Li MD. Disentangling Multiple Effects on Excited-State Intramolecular Charge Transfer among Asymmetrical Tripartite PPI-TPA/PCz Triads. Chemistry 2021; 27:1337-1345. [PMID: 32776379 DOI: 10.1002/chem.202002862] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 07/25/2020] [Indexed: 11/07/2022]
Abstract
By utilizing the bipolarity of 1,2-diphenylphenanthroimidazole (PPI), two types of asymmetrical tripartite triads (PPI-TPA and PPI-PCz) were designed with triphenylamine (TPA) and 9-phenylcarbazole (PCz). These triads are deep-blue luminescent materials with a high fluorescence quantum yield of nearly 100 %. To trace the photophysical behaviors of these triads, their excited-state evolution channels and interchromophoric interactions were investigated by ultrafast time-resolved transient absorption and excited-state theoretical calculations. The results suggest that the electronic nature, asymmetrical tripartite structure, and electron-hole distance of these triads, as well as solvent polarity, determine the lifetime of intramolecular charge transfer (ICT). Interestingly, PPI-PCz triads show anti-Kasha ICT, and the charge-transfer direction among the triads is adjustable. For the PPI-TPA triad, the electron is transferred from TPA to PPI, whereas for the PPI-PCz triad the electron is pushed from PPI to PCz. Exploration of the excited-state ICT in these triads may pave the way to design better luminescent materials in the future.
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Affiliation(s)
- Sirui Yang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China
| | - Chen Cao
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China.,Center of Super-Diamond and Advanced Films (COSDAF), Department of Chemistry, City University of Hong Kong, Hong Kong SAR, 999077, P. R. China
| | - Amjad Islam
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China
| | - Shanshan Sun
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China
| | - Ziqi Deng
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China
| | - Jiayu Li
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China
| | - Shaofei Ni
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China
| | - Qing-Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China
| | - Ming-De Li
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structure Materials of Guangdong Providence, Shantou University, Shantou, 515063, P. R. China
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Zhang Y, Song J, Qu J, Qian PC, Wong WY. Recent progress of electronic materials based on 2,1,3-benzothiadiazole and its derivatives: synthesis and their application in organic light-emitting diodes. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9901-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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17
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Xu Y, Xu P, Hu D, Ma Y. Recent progress in hot exciton materials for organic light-emitting diodes. Chem Soc Rev 2020; 50:1030-1069. [PMID: 33231588 DOI: 10.1039/d0cs00391c] [Citation(s) in RCA: 129] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
According to Kasha's rule, high-lying excited states usually have little effect on fluorescence. However, in some molecular systems, the high-lying excited states partly or even mainly contribute to the photophysical properties, especially in the process of harvesting triplet excitons in organic electroluminescent devices. In the current review, we focus on a type of organic light-emitting diode (OLED) materials called "hot exciton" materials, which can effectively harness the non-radiative triplet excitons via reverse intersystem crossing (RISC) from high-lying triplet states to singlet states (Tn→ Sm; n≥ 2, m≥ 1). Since Ma and Yang proposed the hot exciton mechanism for OLED material design in 2012, there have been many reports aiming at the design and synthesis of novel hot exciton luminogens. Herein, we present a comprehensive review of the recent progress in hot exciton materials. The developments of the hot exciton mechanism are reviewed, the fundamental principles regarding molecular design are discussed, and representative reported hot exciton luminogens are summarized and analyzed, along with their structure-property relationships and OLED applications.
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Affiliation(s)
- Yuwei Xu
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China.
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18
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Zheng XH, Zhao JW, Chen X, Cai R, Yang GX, Zhu JJ, Tang SS, Lin ZH, Tao SL, Tong QX. Imidazo[1,2-a]pyridine as an Electron Acceptor to Construct High-Performance Deep-Blue Organic Light-Emitting Diodes with Negligible Efficiency Roll-Off. Chemistry 2020; 26:8588-8596. [PMID: 32187750 DOI: 10.1002/chem.202000518] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/17/2020] [Indexed: 01/09/2023]
Abstract
Two novel bipolar deep-blue fluorescent emitters, IP-PPI and IP-DPPI, featuring different lengths of the phenyl bridge, were designed and synthesized, in which imidazo[1,2-a]pyridine (IP) and phenanthroimidazole (PI) were proposed as an electron acceptor and an electron donor, respectively. Both of them exhibit outstanding thermal stability and high emission quantum yields. All the devices based on these two materials showed negligible efficiency roll-off with increasing current density. Impressively, non-doped organic light-emitting diodes (OLEDs) based on IP-PPI and IP-DPPI exhibited external quantum efficiencies (EQEs) of 4.85 % and 4.74 % with CIE coordinates of (0.153, 0.097) and (0.154, 0.114) at 10000 cd m-2 , respectively. In addition, the 40 wt % IP-PPI doped device maintained a high EQE of 5.23 % with CIE coordinates of (0.154, 0.077) at 10000 cd m-2 . The doped device based on 20 wt % IP-DPPI exhibited a higher deep-blue electroluminescence (EL) performance with a maximum EQE of up to 6.13 % at CIE of (0.153, 0.078) and maintained an EQE of 5.07 % at 10000 cd m-2 . To the best of our knowledge, these performances are among the state-of-the art devices with CIEy ≤0.08 at a high brightness of 10000 cd m-2 . Furthermore, by doping a red phosphorescent dye Ir(MDQ)2 (MDQ=2-methyldibenzo[f,h]quinoxaline) into the IP-PPI and IP-DPPI hosts, high-performance red phosphorescent OLEDs with EQEs of 20.8 % and 19.1 % were achieved, respectively. This work may provide a new approach for designing highly efficient deep-blue emitters with negligible roll-off for OLED applications.
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Affiliation(s)
- Xu-Hui Zheng
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Jue-Wen Zhao
- School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, P. R. China
| | - Xiang Chen
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Ruoke Cai
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Guo-Xi Yang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Jie-Ji Zhu
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Shan-Shun Tang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Zhi-Hong Lin
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
| | - Si-Lu Tao
- School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, P. R. China
| | - Qing-Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong Province, Shantou University, Guangdong, 515063, P. R. China
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19
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Jayabharathi J, Sivaraj S, Thanikachalam V, Seransenguttuvan B. Efficient blue electroluminescence with an external quantum efficiency of 9.20% and CIE y < 0.08 without excimer emission. RSC Adv 2020; 10:25059-25072. [PMID: 35517441 PMCID: PMC9055148 DOI: 10.1039/d0ra03463k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 06/26/2020] [Indexed: 01/13/2023] Open
Abstract
Aromatically substituted phenanthroimidazoles at the C6 and C9 positions enhanced the thermal, photochemical and electroluminescence properties due to extension of conjugation. These new materials exhibit good photophysical properties with high thermal stability, good film-forming property and high luminous efficiency. The electroluminescence performances of C6 and C9 modified phenanthroimidazoles as host emitters were evaluated as well as the dopant in the fabricated devices. Among the non-doped devices, pyrene substituted PPI-Py or PPICN-Py based devices show maximum efficiency: PPI-Py/PPICN-Py: η c (cd A-1) - 9.20/9.98; η p (lm W-1) - 8.50/9.16; η ex (%) - 5.56/5.80. The doped OLEDs, m-MTDATA/TAPC:PPI-Cz (4.81/4.85%), m-MTDATA/TAPC:PPICN-Cz (5.23/5.26%), m-MTDATA/TAPC:PPI-An (5.01/5.04%), m-MTDATA/TAPC:PPICN-An (5.25/5.28%), m-MTDATA/TAPC:PPI-Py (5.61/5.65%) and m-MTDATA/TAPC:PPICN-Py (5.76/5.78%) show improved device efficiencies compared to non-doped devices. Designing C6/C9 modified phenanthrimidazole fluorophores is an efficient strategy for constructing highly efficient OLEDs.
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Affiliation(s)
| | - Sekar Sivaraj
- Department of Chemistry, Annamalai University Annamalai Nagar Tamilnadu - 608 002 India
| | | | - Balu Seransenguttuvan
- Department of Chemistry, Annamalai University Annamalai Nagar Tamilnadu - 608 002 India
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20
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Song W, Xu Q, Zhu J, Chen Y, Mu H, Huang J, Su J. Imidazo[1,2- b]pyridazine as Building Blocks for Host Materials for High-Performance Red-Phosphorescent Organic Light-Emitting Devices. ACS APPLIED MATERIALS & INTERFACES 2020; 12:19701-19709. [PMID: 32267666 DOI: 10.1021/acsami.9b22060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A novel electron-transporting unit, imidazo [1,2-b]pyridazine (IP), was first reported for developing host materials. The IP moiety possesses excellent electron-transporting ability and great thermal stability. Using carbazole as p-type units and IP as n-type units, several bipolar host materials, namely, IP6Cz, IP68Cz, IP36Cz, and IP368Cz, were developed through altering the substitution site of the IP core. Among these four materials, 6-site-substituted IP6Cz and 6,8-site-substituted IP68Cz exhibit the best electroluminescence (EL) performance. IP6Cz- and IP68Cz-based red phosphorescent organic light-emitting diodes using Ir(pq)2acac as the emitter exhibit extremely high EL efficiency with the maximum external quantum efficiency (ηext,max) of 26.9 and 25.2% and an insignificant efficiency roll-off. Moreover, IP6Cz- and IP68Cz-based deep-red devices doped by Ir(piq)2acac also show satisfactory EL performance with a ηext,max of 20.5 and 19.9%, respectively. The influence of different substitution sites of the IP core on the photophysical and electrochemical properties was systematically investigated. This study demonstrates that IP could be a first-rate electron-transporting unit for bipolar materials for red-emitting devices.
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Affiliation(s)
- Wenxuan Song
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Qihao Xu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Jiangnan Zhu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Yi Chen
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Haichuan Mu
- Department of Physics, School of Science, East China University of Science & Technology, Shanghai 200237, PR China
| | - Jinhai Huang
- Shanghai Taoe Chemical Technology Company, Ltd., Shanghai 200030, PR China
| | - Jianhua Su
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, P. R. China
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21
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Lee HL, Chung WJ, Lee JY. Narrowband and Pure Violet Organic Emitter with a Full Width at Half Maximum of 14 nm and y Color Coordinate of Below 0.02. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1907569. [PMID: 32162765 DOI: 10.1002/smll.201907569] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 06/10/2023]
Abstract
Violet organic light-emitting diodes (OLEDs) with a very narrow emission spectrum with a full width at half maximum of 14 nm and y color coordinate of 0.02 are developed using a indolo[3,2,1-jk]carbazole-derived pure violet emitter. The violet emitter, 2,5,13,16-tetra-tert-butylindolo[3,2,1-jk]-indolo[1',2',3':1,7]indolo[2,3-b]carbazole (tDIDCz), is designed to have a very rigid molecular structure driven by the multiresonance-type core structure through the alternating carbon and nitrogen atoms. The violet emitter is decorated with t-butyl groups to prevent intermolecular aggregation and packing, which allow pure violet emission without excimer emission. The violet OLEDs derived from the tDIDCz emitter show a violet color coordinate of (0.164, 0.018) with a narrow emission spectrum and a full width at half maximum of 14 nm (105 meV). The external quantum efficiency of the pure violet OLEDs is 3.3%. This is the first work reporting pure violet emission without any ultraviolet emission below 380 nm and blue emission above 450 nm by showing a very narrow emission spectrum.
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Affiliation(s)
- Ha Lim Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 16419, Korea
| | - Won Jae Chung
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 16419, Korea
| | - Jun Yeob Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 16419, Korea
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22
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Liu J, Geng Y, Li D, Yao H, Huo Z, Li Y, Zhang K, Zhu S, Wei H, Xu W, Jiang J, Yang B. Deep Red Emissive Carbonized Polymer Dots with Unprecedented Narrow Full Width at Half Maximum. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1906641. [PMID: 32191372 DOI: 10.1002/adma.201906641] [Citation(s) in RCA: 162] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 02/23/2020] [Accepted: 03/09/2020] [Indexed: 05/23/2023]
Abstract
Development of high-performance carbon dots (CDs) with emission wavelength longer than 660 nm (deep red emission) is critical in deep-tissue bioimaging, yet it is still a major challenge to obtain CDs with both narrow full width at half maximum (FWHM) and high deep red/near-infrared emission yield. Here, deep red emissive carbonized polymer dots (CPDs) with unprecedented FWHM of 20 nm are synthesized. The purified CPDs in dimethyl sulfoxide (DMSO) solution possess quantum yield (QY) as high as 59% under 413 nm excitation, as well as recorded QY of 31% under 660 nm excitation in the deep red fluorescent window. Detailed characterizations identify that CPDs have unique polymer characteristics, consisting of carbon cores and the shells of polymer chains, and π conjugated system formed with N heterocycles and aromatic rings governs the single photoluminescence (PL) center, which is responsible for high QY in deep red emissive CPDs with narrow FWHM. The CPDs exhibit strong absorption and emission in the deep red light region, low toxicity, and good biocompatibility, making them an efficient probe for both one-photon and two-photon bioimaging. CPDs are rapidly excreted via the kidney system and hepatobiliary system.
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Affiliation(s)
- Junjun Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Yijia Geng
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Daowei Li
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, School and Hospital of Stomatology, Jilin University, Changchun, 130021, P. R. China
| | - Hua Yao
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, P. R. China
| | - Zepeng Huo
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Yunfeng Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Kai Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Shoujun Zhu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Haotong Wei
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Weiqing Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Jinlan Jiang
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, P. R. China
| | - Bai Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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Jayabharathi J, Panimozhi S, Thanikachalam V. A novel hot exciton blue fluorophores and white organic light-emitting diodes with simplified configuration. Sci Rep 2020; 10:5114. [PMID: 32198377 PMCID: PMC7083847 DOI: 10.1038/s41598-020-62029-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 01/13/2020] [Indexed: 12/03/2022] Open
Abstract
The two efficient non-doped blue emitters with hybridized local and charge transfer state namely, NDBNPIN and DBTPIN have been synthesised and characterised. These materials are employed as a host for green and red phosphorescent OLEDs. The white device based on DBTPIN:Ir(MDQ)2(acac) (4%) exhibit maximum external quantum efficiency (ηex) -24.8%; current efficiency (ηc) -57.1 cdA-1; power efficiency (ηp) -64.8 lmW-1 with Commission Internationale de l'Eclairage (CIE:0.49, 0.40) than NDBNPIN:Ir(MDQ)2acac (4%) device [ηex - 23.1%; ηc -54.6 cd A-1; ηp- 60.0 lm W-1 with CIE (0.47, 0.42)].
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Affiliation(s)
- Jayaraman Jayabharathi
- Department of Chemistry, Annamalai University, Annamalainagar, 608 002, Tamilnadu, India.
| | - Sekar Panimozhi
- Department of Chemistry, Annamalai University, Annamalainagar, 608 002, Tamilnadu, India
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24
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Thiyagarajan MD, Balijapalli U, Nasiri S, Volyniuk D, Simokaitienec J, Pathak M, Iyer SK, Gražulevičius JV. Rational Synthesis of Tetrahydrodibenzophenanthridine and Phenanthroimidazole as Efficient Blue Emitters and their Applications. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Umamahesh Balijapalli
- Department of Chemistry; School of Advanced Sciences; Vellore Institute of Technology; 632014 Vellore Tamilnadu India
- Centre for Organic Photonics and Electronics Research (OPERA); Kyushu University; 744 Motooka, Nishi 819-0395 Fukuoka Japan
| | - Sohrab Nasiri
- Kaunas University of Technology; Department of Polymer Chemistry and Technology; Radvilenu pl.19, LT 50254 Kaunas Lithunania
| | - Dmytro Volyniuk
- Kaunas University of Technology; Department of Polymer Chemistry and Technology; Radvilenu pl.19, LT 50254 Kaunas Lithunania
| | - Jurate Simokaitienec
- Kaunas University of Technology; Department of Polymer Chemistry and Technology; Radvilenu pl.19, LT 50254 Kaunas Lithunania
| | - Madhvesh Pathak
- Department of Chemistry; School of Advanced Sciences; Vellore Institute of Technology; 632014 Vellore Tamilnadu India
| | - Sathiyanarayanan Kulathu Iyer
- Department of Chemistry; School of Advanced Sciences; Vellore Institute of Technology; 632014 Vellore Tamilnadu India
| | - Juozas Vidas Gražulevičius
- Kaunas University of Technology; Department of Polymer Chemistry and Technology; Radvilenu pl.19, LT 50254 Kaunas Lithunania
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25
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Feng Q, Tan K, Zheng X, Xie S, Xue K, Bo Y, Zhang H, Lin D, Rao J, Xie X, Xie L, Cao H, Zhang H, Wei Y, Huang W. Simultaneous and Significant Improvements in Efficiency and Stability of Deep‐Blue Organic Light Emitting Diodes through Friedel‐Crafts Arylmethylation of a Fluorophore. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.201900268] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Quanyou Feng
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Kesheng Tan
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Xiaojun Zheng
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Songlin Xie
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Kai Xue
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Yifan Bo
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - He Zhang
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Dongqing Lin
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Junfeng Rao
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Xinmiao Xie
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Linghai Xie
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Hongtao Cao
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Hongmei Zhang
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Ying Wei
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Wei Huang
- Key Laboratory for Organic Electronics and Information Displays Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 China
- Shaanxi Institute of Flexible ElectronicsNorthwestern Polytechnical University 127 West Youyi Road Xi'an 710072 China
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26
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Tsuchiya T, Katsuoka Y, Yoza K, Sato H, Mazaki Y. Stereochemistry, Stereodynamics, and Redox and Complexation Behaviors of 2,2'-Diaryl-1,1'-Biazulenes. Chempluschem 2020; 84:1659-1667. [PMID: 31943874 DOI: 10.1002/cplu.201900262] [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: 05/30/2019] [Revised: 06/25/2019] [Indexed: 11/11/2022]
Abstract
2,2'-Diaryl-1,1'-biazulenes were synthesized and electronic communication between the azulene subunits was suggested based on redox measurements. The linkage of azulene at the 1-position also appeared to increase the HOMO levels. In addition, cyclic voltammetry measurements of 2-arylazulenes showed a return peak associated with the oxidation, which was not observed for azulene. The stabilization of the single-electron oxidant may be due to the SOMO-HOMO energy inversion phenomenon. X-ray crystallography of the azulene dimers revealed that this species possessed a syn-type structure in which both aryl groups in the 2-positions formed π-stacks. The twisted structure was indicated to be in the (R)- or (S)-configuration for all molecules in the unit cell. Spontaneous resolution was also shown. Furthermore, from the solid circular dichroism (CD) spectral measurements, the relationship between the absolute configuration of the molecules and the CD spectra was determined. A racemization rotational barrier of ca. 27 kcal mol-1 was calculated. Moreover, the pyridylazulene dimer cyclized upon reaction with PdCl2 to form a 3 : 3 complex, in which the biazulene units cyclized to give ratios between the (R)- and (S)-forms of either 2 : 1 or 1 : 2.
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Affiliation(s)
- Takahiro Tsuchiya
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Yuka Katsuoka
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kenji Yoza
- Bruker Japan, 3-9 Moriya-cho, Kanagawa-ku, Yokohama, 221-0022, Japan
| | - Hiroyasu Sato
- Rigaku Corporation, 3-9-12 Matsubara, Akishima, Tokyo, 196-8666, Japan
| | - Yasuhiro Mazaki
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
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27
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Kathirvelan D, Mayakrishnan S, Uma Maheswari N, Biswas C, Raavi SSK, Panda TK. A simple D–π–A system of phenanthroimidazole-π-fluorenone for highly efficient non-doped bipolar AIE luminogens: synthesis, and molecular optical, thermal and electrochemical properties. NEW J CHEM 2020. [DOI: 10.1039/c9nj05226g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We report the synthesis of phenanthroimidazole based dyes incorporating fluorenone using Suzuki coupling and their aggregation induced emission characterisation.
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Affiliation(s)
| | - Sivakalai Mayakrishnan
- Organic & Bioorganic Chemistry Laboratory
- CSIR-Central Leather Research Institute
- Chennai
- India
| | - Narayanan Uma Maheswari
- Organic & Bioorganic Chemistry Laboratory
- CSIR-Central Leather Research Institute
- Chennai
- India
| | - Chinmoy Biswas
- Department of Physics
- Indian Institute of Technology Hyderabad
- India
| | | | - Tarun K. Panda
- Department of Chemistry
- Indian Institute of Technology Hyderabad
- India
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28
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Vanga M, Sa S, Kumari A, Murali AC, Nayak P, Das R, Venkatasubbaiah K. Synthesis of π-extended B ← N coordinated phenanthroimidazole dimers and their linear and nonlinear optical properties. Dalton Trans 2020; 49:7737-7746. [DOI: 10.1039/d0dt01024c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
B ← N coordinated phenanthroimidazole dimers exhibit excellent fluorescence quantum yields in solution and conjugation length dependant two-photon-absorption properties.
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Affiliation(s)
- Mukundam Vanga
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Shreenibasa Sa
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Anupa Kumari
- School of Physical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Anna Chandrasekar Murali
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Prakash Nayak
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Ritwick Das
- School of Physical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Krishnan Venkatasubbaiah
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
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29
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Sauvé ER, Paeng J, Yamaguchi S, Hudson ZM. Donor–Acceptor Materials Exhibiting Thermally Activated Delayed Fluorescence Using a Planarized N-Phenylbenzimidazole Acceptor. J Org Chem 2019; 85:108-117. [DOI: 10.1021/acs.joc.9b02283] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ethan R. Sauvé
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jaesuk Paeng
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate School of Science, Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Zachary M. Hudson
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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30
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Zheng X, Zhao J, Huang T, Chen X, Cao C, Yang G, Lin Z, Tong Q, Tao S, Liu D. Versatile Host Materials for Highly‐Efficient Green, Red Phosphorescent and White Organic Light‐Emitting Diodes. ChemElectroChem 2019. [DOI: 10.1002/celc.201901466] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xu‐Hui Zheng
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong ProvinceShantou University Guangdong 515063 P. R. China
| | - Jue‐Wen Zhao
- School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China (UESTC) Chengdu 610054 P. R. China
| | - Ting‐Ting Huang
- State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of Technology 2 Linggong Road Dalian 116024 P.R. China
| | - Xiang Chen
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong ProvinceShantou University Guangdong 515063 P. R. China
| | - Chen Cao
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong ProvinceShantou University Guangdong 515063 P. R. China
| | - Guo‐Xi Yang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong ProvinceShantou University Guangdong 515063 P. R. China
| | - Zhi‐Hong Lin
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong ProvinceShantou University Guangdong 515063 P. R. China
| | - Qing‐Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Material of Guangdong ProvinceShantou University Guangdong 515063 P. R. China
| | - Si‐Lu Tao
- School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China (UESTC) Chengdu 610054 P. R. China
| | - Di Liu
- State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of Technology 2 Linggong Road Dalian 116024 P.R. China
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31
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The dibenzothiophene-S,S-dioxide and spirobifluorene based small molecules promote Low roll-off and Blue organic light-emitting diodes. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111946] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Zhang J, Ma H. Synthesis, Characterization, and Crystal Structures of Imides Condensed with p-Phenylamino(Phenyl) Amine and Fluorescence Property. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E1873. [PMID: 31185634 PMCID: PMC6600954 DOI: 10.3390/ma12111873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/01/2019] [Accepted: 06/05/2019] [Indexed: 12/19/2022]
Abstract
A series of aromatic diimide and monoimide compounds condensed with p-phenylamino(phenyl)amine were synthesized and confirmed by Proton Nuclear Magnetic Resonance (1H NMR), Carbon-13 Nuclear Magnetic Resonance (13C NMR), Fourier Transform Infrared Spectroscopy (FT-IR), Elemental Analysis (EA), and High Resolution Mass Spectroscopy (HRMS). Meanwhile, single crystal X-ray diffraction showed the existence of intermolecular N···O hydrogen bonds, which affected the thermal stabilities of corresponding compounds by the support of Thermalgravimetric Analysis (TGA) curves. The steady-state UV-vis absorption peaks of synthetic compounds 1-6 appeared in the range of 220-380 nm. Fluorescence emission spectra showed peaks in the range of 290-420 nm. Meanwhile, deep-blue or violet-blue emissions for 2, 4, and 5 in THF under excitations of 254 nm and 365 nm, respectively, were observed at room temperature in air. Furthermore, Differential pulse voltammetry (DPV) and cyclic voltammogram CV were conducted within -1.5-+1.5 V to show quasi-reversible behavior for conjugated compounds and irreversible behavior for less conjugated ones.
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Affiliation(s)
- Jing Zhang
- Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.
| | - Huaibo Ma
- Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China.
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33
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Konidena RK, Lee KH, Lee JY, Hong WP. Triggering Thermally Activated Delayed Fluorescence by Managing the Heteroatom in Donor Scaffolds: Intriguing Photophysical and Electroluminescence Properties. Chem Asian J 2019; 14:2251-2258. [PMID: 30969458 DOI: 10.1002/asia.201900388] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 04/09/2019] [Indexed: 02/06/2023]
Abstract
Establishment of the structure-property relationships of thermally activated delayed fluorescence (TADF) materials has become a significant quest for the scientific community. Herein, two new donors, 10H-benzofuro[3,2-b]indole (BFI) and 10H-benzo[4,5]thieno[3,2-b]indole (BTI), have been developed and integrated with a aryltriazine acceptor to design the green TADF emitters benzofuro[3,2-b]indol-10-yl)-5-(4,6-diphenyl-1,3,5-triazin-2-yl)benzonitrile (BFICNTrz) and 2-(10H-benzo[4,5]thieno[3,2-b]indol-10-yl)-5-(4,6-diphenyl-1,3,5-triazin-2-yl)benzonitrile (BTICNTrz), respectively. The physicochemical and electroluminescence properties of the compounds were tuned by exchanging the heteroatom in the donor scaffold. Intriguingly, the electronegativity of the heteroatom and the ionization potential of the donor unit played vital roles in control of the singlet-triplet energy splitting and TADF mechanism of the compounds. Both compounds showed similar singlet excited states that originated from the charge transfer (CT) states (1 CT), whereas the triplet excited states were tuned by the heteroatom in the donor unit. The origin of phosphorescence in the BTICNTrz emitter was CT emission from the triplet state (3 CT), whereas that in the BFICNTrz emitter stemmed from the local triplet excited state (3 LE). Consequently, BTICNTrz showed a small singlet-triplet energy splitting of 0.08 eV, compared with 0.26 eV for BFICNTrz. Thus, BTICNTrz showed efficient delayed fluorescence with a high quantum yield and a short delayed exciton lifetime, whereas BFICNTrz displayed weak delayed fluorescence with a relatively long lifetime. Furthermore, a BTICNTrz-based device exhibited a maximum external quantum efficiency (EQE) of 15.2 % and reduced efficiency roll-off (12 %) compared with its BFICNTrz-based counterpart, which showed a maximum EQE of 6.4 % and severe efficiency roll-off (55 %) at a practical brightness range of 1000 cd m-2 . These results demonstrate that the choice of subunit plays a vital role in the design of efficient TADF emitters.
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Affiliation(s)
- Rajendra Kumar Konidena
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi, 440-746, Korea
| | - Kyung Hyung Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi, 440-746, Korea
| | - Jun Yeob Lee
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi, 440-746, Korea
| | - Wan Pyo Hong
- LG Chem, Ltd, LG Science Park, 30, Magokjungang 10-ro, Gangseo-gu, Seoul, 07796, Republic of Korea
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34
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Tagare J, Dubey DK, Jou J, Vaidyanathan S. Near UV/Deep‐Blue Phenanthroimidazole‐Based Luminophores for Organic Light‐Emitting Diodes: Experimental and Theoretical Investigation. ChemistrySelect 2019. [DOI: 10.1002/slct.201900383] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jairam Tagare
- Optoelectronics laboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
| | - Deepak Kumar Dubey
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu Taiwan- 30013
| | - Jwo‐Huei Jou
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu Taiwan- 30013
| | - Sivakumar Vaidyanathan
- Optoelectronics laboratoryDepartment of ChemistryNational Institute of Technology Rourkela India
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35
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Cao C, Chen WC, Chen JX, Yang L, Wang XZ, Yang H, Huang B, Zhu ZL, Tong QX, Lee CS. Bipolar Blue Host Emitter with Unity Quantum Yield Allows Full Exciton Radiation in Single-Emissive-Layer Hybrid White Organic Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2019; 11:11691-11698. [PMID: 30838854 DOI: 10.1021/acsami.9b01105] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Phosphorescence/fluorescence hybrid white organic light-emitting diodes (OLEDs) are highly appealing for solid-state lighting. One major challenge is how to fully utilize the electrically generated excitons for light output. Herein, an efficient strategy to realize full exciton radiation is successfully revealed by a judicious molecular design and suitable device engineering. A blue host emitter TP-PPI is designed and synthesized, exhibiting a near 100% photoluminescence quantum yield and a high triplet energy level, enabling high-performance blue fluorescence and sensitization of a yellow phosphorescent dopant. Full exciton radiation in hybrid white OLEDs is demonstrated with a single emitting layer formed by doping a yellow phosphor (PO-01) into TP-PPI. Near 100% exciton utilization and state-of-the-art external quantum efficiency of 27.5% are achieved with the high-efficiency blue-emitting host and an electron-trap engineered device architecture.
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Affiliation(s)
- Chen Cao
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , 243 University Road , Shantou , Guangdong 515063 , P. R. China
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry , City University of Hong Kong, Hong Kong SAR & City University of Hong Kong Shenzhen Research Institute , Shenzhen , Guangdong 518057 , P. R. China
| | - Wen-Cheng Chen
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry , City University of Hong Kong, Hong Kong SAR & City University of Hong Kong Shenzhen Research Institute , Shenzhen , Guangdong 518057 , P. R. China
| | - Jia-Xiong Chen
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry , City University of Hong Kong, Hong Kong SAR & City University of Hong Kong Shenzhen Research Institute , Shenzhen , Guangdong 518057 , P. R. China
| | - Lei Yang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , 243 University Road , Shantou , Guangdong 515063 , P. R. China
| | - Xue-Zhi Wang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , 243 University Road , Shantou , Guangdong 515063 , P. R. China
| | - Hu Yang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , 243 University Road , Shantou , Guangdong 515063 , P. R. China
| | - Bin Huang
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry , City University of Hong Kong, Hong Kong SAR & City University of Hong Kong Shenzhen Research Institute , Shenzhen , Guangdong 518057 , P. R. China
- College of Life Sciences and Chemistry, Jiangsu Key Laboratory of Biofunctional Molecule, Institute of New Materials for Vehicles , Jiangsu Second Normal University , Nanjing 210013 , P. R. China
| | - Ze-Lin Zhu
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry , City University of Hong Kong, Hong Kong SAR & City University of Hong Kong Shenzhen Research Institute , Shenzhen , Guangdong 518057 , P. R. China
| | - Qing-Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province , Shantou University , 243 University Road , Shantou , Guangdong 515063 , P. R. China
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry , City University of Hong Kong, Hong Kong SAR & City University of Hong Kong Shenzhen Research Institute , Shenzhen , Guangdong 518057 , P. R. China
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36
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Liu F, Tao Y, Li J, Liu H, He X, Du C, Tang X, Lu P. Efficient Non‐doped Blue Fluorescent Organic Light‐Emitting Diodes Based on Anthracene–Triphenylethylene Derivatives. Chem Asian J 2019; 14:1004-1012. [DOI: 10.1002/asia.201801867] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/21/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Futong Liu
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Yanchun Tao
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Jinyu Li
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Hui Liu
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Xin He
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Chunya Du
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Xiangyang Tang
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
| | - Ping Lu
- Department of ChemistryState Key Laboratory of Supramolecular Structure and MaterialsJilin University 2699 Qianjin Avenue Changchun 130012 P. R. China
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37
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Ito S, Nishimoto C, Nagai S. Sequential halochromic/mechanochromic luminescence of pyridyl-substituted solid-state emissive dyes: thermally controlled stepwise recovery of the original emission color. CrystEngComm 2019. [DOI: 10.1039/c9ce01037h] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A stepwise temperature-controlled emission-color switch has been achieved in a system that combines halochromic and mechanochromic luminescence in series.
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Affiliation(s)
- Suguru Ito
- Department of Advanced Materials Chemistry
- Graduate School of Engineering
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Chika Nishimoto
- Department of Advanced Materials Chemistry
- Graduate School of Engineering
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Sayaka Nagai
- Department of Advanced Materials Chemistry
- Graduate School of Engineering
- Yokohama National University
- Yokohama 240-8501
- Japan
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38
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Wang Y, Yu Y, Liu W, Ren L, Ge G. Exploration of Highly Efficient Blue-Violet Light Conversion Agents for an Agricultural Film Based on Structure Optimization of Triphenylacrylonitrile. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:13295-13302. [PMID: 30476432 DOI: 10.1021/acs.jafc.8b05453] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
To obtain highly efficient blue-violet light conversion agents used for an agricultural film, six triarylacrylonitrile derivatives and their doping films were prepared. Further, the luminogens have the ability to convert ultraviolet light into blue-violet light and exhibit aggregation-dependent fluorescence emission and high-contrast fluorescence quantum yields from 0.004 to 0.833. On the basis of X-ray single-crystal diffraction analysis and aggregation-induced emission activity tests, the variant fluorescence quantum yields are attributed to intermolecular π-π stacking and phase transition between the crystalline state and amorphous state. In a simulated greenhouse environment, the luminogens exhibit excellent photostability. However, their fluorescence intensity drops to 17-40% of the prime intensity after outdoor radiation for 1 month as a result of the ring-closing oxidation reaction (in the summer). By comprehensively considering the above photophysical properties and mechanical properties of the doping film, 2-([1,1'-biphenyl]-4-yl)-3,3-diphenylacrylonitrile is a potential light conversion agent for an agricultural film in the winter. More importantly, the results indicate that the properties of the light conversion films are expected to be further improved by molecular design, inhibiting the ring-closing oxidation reaction and dispersion of crystalline nanoparticles in the doping film.
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Affiliation(s)
- Yongtao Wang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan , Shihezi University , Shihezi , Xinjiang 832003 , People's Republic of China
- Shenyang University of Chemical Technology , Shenyang , Liaoning 110142 , People's Republic of China
| | - Yongjiang Yu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan , Shihezi University , Shihezi , Xinjiang 832003 , People's Republic of China
| | - Wenjing Liu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan , Shihezi University , Shihezi , Xinjiang 832003 , People's Republic of China
| | - Litong Ren
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan , Shihezi University , Shihezi , Xinjiang 832003 , People's Republic of China
| | - Guixian Ge
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan , Shihezi University , Shihezi , Xinjiang 832003 , People's Republic of China
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39
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Wang S, Qiao M, Ye Z, Dou D, Chen M, Peng Y, Shi Y, Yang X, Cui L, Li J, Li C, Wei B, Wong WY. Efficient Deep-Blue Electrofluorescence with an External Quantum Efficiency Beyond 10. iScience 2018; 9:532-541. [PMID: 30497025 PMCID: PMC6258878 DOI: 10.1016/j.isci.2018.10.026] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/30/2018] [Accepted: 10/25/2018] [Indexed: 11/26/2022] Open
Abstract
The design of blue fluorescent materials combining both deep-blue emission (CIEy<0.06) and high-efficiency climbing over the typically limited exciton production efficiency of 25% is a challenge for organic light-emitting diodes (OLEDs). In this work, we have synthesized two blue luminogens, trans-9,10-bis(2-butoxyphenyl)anthracene (BBPA) and trans-9,10-bis (2,4-dimethoxyphenyl)anthracene with high photoluminescence quantum yields (PLQYs) of 89.5% and 87.0%, respectively. Intriguingly, we have proposed a strategy to avoid aggregation-caused quenching, which can effectively reduce the undesirable excimeric emission by introducing two host matrices with twisted molecular structure, 9,10-di(naphth-2-yl) anthracene and 10,10′-bis-(4-fluorophenyl)-3,3′-dimethyl-9,9′-bianthracene (MBAn-(4)-F), in the BBPA emission layer. The device containing the EML of BBPA-doped MBAn-(4)-F exhibited a high external quantum efficiency of 10.27% for deep-blue emission with the Commission International de L'Eclairage CIE coordinates of (0.15, 0.05) via the steric effect. Importantly, this represents an advance in deep-blue-emitting fluorescent OLED architectures and materials that meet the requirements of high-definition display. Highly efficient deep-blue luminogens BBPA and DMPA are synthesized Low-efficiency roll-off deep-blue OLEDs with CIE coordinate Y < 0.06 Record-high external quantum efficiency of 10.27% for deep-blue fluorescent OLEDs Host matrix of twisted structure showing steric effect reduces intermolecular aggregation
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Affiliation(s)
- Shuanglong Wang
- School of Mechatronic Engineering and Automation, Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, P. R. China
| | - Mengya Qiao
- Department of Chemistry, Center for Supramolecular Chemistry and Catalysis, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Zhonghua Ye
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, P. R. China
| | - Dehai Dou
- School of Mechatronic Engineering and Automation, Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, P. R. China
| | - Minyu Chen
- School of Mechatronic Engineering and Automation, Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, P. R. China
| | - Yan Peng
- School of Mechatronic Engineering and Automation, Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, P. R. China
| | - Ying Shi
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, P. R. China
| | - Xuyong Yang
- School of Mechatronic Engineering and Automation, Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, P. R. China
| | - Lei Cui
- Department of Chemistry, Center for Supramolecular Chemistry and Catalysis, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Jiuyan Li
- School of Chemical Engineering, Dalian University of Technology, Liaoning 116024, P.R. China
| | - Chunju Li
- Department of Chemistry, Center for Supramolecular Chemistry and Catalysis, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China.
| | - Bin Wei
- School of Mechatronic Engineering and Automation, Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, P. R. China.
| | - Wai-Yeung Wong
- Institute of Molecular Functional Materials and Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. China.
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40
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Matta A, Gupta M, Kumar Y, Taniike T, Van der Eycken J, Singh BK. One-Pot Synthesis and Photophysical Studies of Dihydropyrimidinone-Based Dyes: Novel Violet-Blue Light Emitting Fluorophores. ChemistrySelect 2018. [DOI: 10.1002/slct.201802199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Akanksha Matta
- Bioorganic Laboratory; Department of Chemistry; University of Delhi; Delhi 110 007 India
- Graduate School of Advanced Science and Technology; Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi; Ishikawa 923-1292 Japan
- Laboratory for Organic and Bioorganic Synthesis; Department of Organic Chemistry; Ghent University, Krijgslaan 281 (S.4); B-9000-Ghent Belgium
| | - Mohit Gupta
- Bioorganic Laboratory; Department of Chemistry; University of Delhi; Delhi 110 007 India
| | - Yogesh Kumar
- Bioorganic Laboratory; Department of Chemistry; University of Delhi; Delhi 110 007 India
- Department of Chemistry; Hansraj College; University of Delhi, Malka Ganj; Delhi 110 007 India
| | - Toshiaki Taniike
- Graduate School of Advanced Science and Technology; Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi; Ishikawa 923-1292 Japan
| | - Johan Van der Eycken
- Laboratory for Organic and Bioorganic Synthesis; Department of Organic Chemistry; Ghent University, Krijgslaan 281 (S.4); B-9000-Ghent Belgium
| | - Brajendra K. Singh
- Bioorganic Laboratory; Department of Chemistry; University of Delhi; Delhi 110 007 India
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41
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Liu B, Zhu Z, Zhao J, He D, Wang Z, Luo C, Tong Q, Lee C, Tao S. Ternary Acceptor–Donor–Acceptor Asymmetrical Phenanthroimidazole Molecule for Highly Efficient Near‐Ultraviolet Electroluminescence with External Quantum Efficiency (EQE) >4 %. Chemistry 2018; 24:15566-15571. [DOI: 10.1002/chem.201801822] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 07/31/2018] [Indexed: 01/12/2023]
Affiliation(s)
- Bin Liu
- Department of Chemistry and Key Laboratory for, Preparation and Application of Ordered Structural Materials of, Guangdong Province Shantou University Guangdong 515063 P.R. China
- Department of Physics Fudan University Shanghai 200433 P.R. China
| | - Ze‐Lin Zhu
- Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry City University of Hong Kong Hong Kong SAR P.R. China
| | - Jue‐Wen Zhao
- School of Optoelectronic Information University of Electronic Science and Technology of China (UESTC) Chengdu 610054 P.R. China
| | - Dan He
- Department of Chemistry and Key Laboratory for, Preparation and Application of Ordered Structural Materials of, Guangdong Province Shantou University Guangdong 515063 P.R. China
| | - Zhong‐Yi Wang
- Department of Chemistry and Key Laboratory for, Preparation and Application of Ordered Structural Materials of, Guangdong Province Shantou University Guangdong 515063 P.R. China
| | - Cheng‐Yuan Luo
- Department of Chemistry and Key Laboratory for, Preparation and Application of Ordered Structural Materials of, Guangdong Province Shantou University Guangdong 515063 P.R. China
| | - Qing‐Xiao Tong
- Department of Chemistry and Key Laboratory for, Preparation and Application of Ordered Structural Materials of, Guangdong Province Shantou University Guangdong 515063 P.R. 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
| | - Si‐Lu Tao
- School of Optoelectronic Information University of Electronic Science and Technology of China (UESTC) Chengdu 610054 P.R. China
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42
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Joseph V, Justin Thomas KR, Yang WY, Kumar Yadav RA, Kumar Dubey D, Jou JH. Tetra-substituted Dipolar Carbazoles: Tuning Optical and Electroluminescence Properties by Linkage Variation. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800248] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Vellaichamy Joseph
- Organic Materials Laboratory; Department of Chemistry; Indian Institute of Technology Roorkee; Roorkee 247 667 India
| | - K. R. Justin Thomas
- Organic Materials Laboratory; Department of Chemistry; Indian Institute of Technology Roorkee; Roorkee 247 667 India
| | - Wan Yun Yang
- Department of Materials science and engineering; National Tsing Hua University; Hsinchu 30013 Taiwan
| | - Rohit Ashok Kumar Yadav
- Department of Materials science and engineering; National Tsing Hua University; Hsinchu 30013 Taiwan
| | - Deepak Kumar Dubey
- Department of Materials science and engineering; National Tsing Hua University; Hsinchu 30013 Taiwan
| | - Jwo-Huei Jou
- Department of Materials science and engineering; National Tsing Hua University; Hsinchu 30013 Taiwan
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43
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Peng S, Zhao Y, Fu C, Pu X, Zhou L, Huang Y, Lu Z. Acquiring High-Performance Deep-Blue OLED Emitters through an Unexpected Blueshift Color-Tuning Effect Induced by Electron-Donating -OMe Substituents. Chemistry 2018; 24:8056-8060. [PMID: 29655182 DOI: 10.1002/chem.201800974] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/05/2018] [Indexed: 11/11/2022]
Abstract
A series of blue-emissive 7-(diphenylamino)-4-phenoxycoumarin derivatives bearing -CF3 , -OMe, or -N(Me)2 substituents on the phenoxy subunit were synthesized. Although both the -CF3 and -N(Me)2 modifications were found to trigger redshifted fluorescence, the -OMe substitution was demonstrated to exert an unexpected blueshift color-tuning effect toward the deep-blue region. The reason is that the moderate electron-donating -OMe group can endow coumarins with unaltered HOMO but elevated LUMO energy levels. Moreover, the -OMe substitution was found to be beneficial to the thermal stability of these coumarins. Therefore, the trimethoxy-substituted objective compound can act as a high-performance deep-blue organic light-emitting diode (OLED) emitter, and OLED based on it emits deep-blue light with CIE coordinates of (0.148, 0.084), maximum luminance of 7800 cd m-2 , and maximum external quantum efficiency of 5.1 %. These results not only shed light on the molecular design strategy for high-performance deep-blue OLED emitters through color-tuning, but also show the perspective of coumarin derivatives as deep-blue OLED emitters.
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Affiliation(s)
- Song Peng
- Key Laboratory of Green Chemistry and Technology (Ministry of, Education), College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Yihuan Zhao
- Key Laboratory of Green Chemistry and Technology (Ministry of, Education), College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Caixia Fu
- Key Laboratory of Green Chemistry and Technology (Ministry of, Education), College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Xuemei Pu
- Key Laboratory of Green Chemistry and Technology (Ministry of, Education), College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Liang Zhou
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China
| | - Yan Huang
- Key Laboratory of Green Chemistry and Technology (Ministry of, Education), College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
| | - Zhiyun Lu
- Key Laboratory of Green Chemistry and Technology (Ministry of, Education), College of Chemistry, Sichuan University, Chengdu, 610064, P.R. China
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44
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Song W, Shi L, Gao L, Hu P, Mu H, Xia Z, Huang J, Su J. [1,2,4]Triazolo[1,5-a]pyridine as Building Blocks for Universal Host Materials for High-Performance Red, Green, Blue and White Phosphorescent Organic Light-Emitting Devices. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5714-5722. [PMID: 29368499 DOI: 10.1021/acsami.7b18202] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The electron-accepting [1,2,4]triazolo[1,5-a]pyridine (TP) moiety was introduced to build bipolar host materials for the first time, and two host materials based on this TP acceptor and carbazole donor, namely, 9,9'-(2-([1,2,4]triazolo[1,5-a]pyridin-2-yl)-1,3-phenylene)bis(9H-carbazole) (o-CzTP) and 9,9'-(5-([1,2,4]triazolo[1,5-a]pyridin-2-yl)-1,3-phenylene)bis(9H-carbazole) (m-CzTP), were designed and synthesized. These two TP-based host materials possess a high triplet energy (>2.9 eV) and appropriate highest occupied molecular orbital/lowest unoccupied molecular orbital levels as well as the bipolar transporting feature, which permits their applicability as universal host materials in multicolor phosphorescent organic light-emitting devices (PhOLEDs). Blue, green, and red PhOLEDs based on o-CzTP and m-CzTP with the same device configuration all show high efficiencies and low efficiency roll-off. The devices hosted by o-CzTP exhibit maximum external quantum efficiencies (ηext) of 27.1, 25.0, and 15.8% for blue, green, and red light emitting, respectively, which are comparable with the best electroluminescene performance reported for FIrpic-based blue, Ir(ppy)3-based green, and Ir(pq)2(acac)-based red PhOLEDs equipped with a single-component host. The white PhOLEDs based on the o-CzTP host and three lumophors containing red, green, and blue emitting layers were fabricated with the same device structure, which exhibit a maximum current efficiency and ηc of 40.4 cd/A and 17.8%, respectively, with the color rendering index value of 75.
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Affiliation(s)
| | | | - Lei Gao
- School of Chemistry and Chemical Engineering, Queen's University , Belfast BT7 1NN, U.K
| | - Peijun Hu
- School of Chemistry and Chemical Engineering, Queen's University , Belfast BT7 1NN, U.K
| | | | - Zhenyuan Xia
- Shanghai Taoe Chemical Technology Co., Ltd , Shanghai 200030, PR China
| | - Jinhai Huang
- Shanghai Taoe Chemical Technology Co., Ltd , Shanghai 200030, PR China
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45
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Zhang Z, Zhang Z, Zhang H, Wang Y. 2-(2-Hydroxyphenyl)imidazole-based four-coordinate organoboron compounds with efficient deep blue photoluminescence and electroluminescence. Dalton Trans 2018; 47:127-134. [DOI: 10.1039/c7dt03702c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Four-coordinate organoboron compounds that can realize efficient electroluminescence with a CIE coordinate close to that of standard blue light (0.14, 0.08) have been developed.
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Affiliation(s)
- Zhenyu Zhang
- State Grid Shanxi Electric Power Research Institute
- Taiyuan 030001
- P. R. China
| | - Zuolun Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Hongyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Yue Wang
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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46
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Li B, Zhou L, Cheng H, Huang Q, Lan J, Zhou L, You J. Dual-emissive 2-(2'-hydroxyphenyl)oxazoles for high performance organic electroluminescent devices: discovery of a new equilibrium of excited state intramolecular proton transfer with a reverse intersystem crossing process. Chem Sci 2017; 9:1213-1220. [PMID: 29675166 PMCID: PMC5885805 DOI: 10.1039/c7sc04464j] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 11/30/2017] [Indexed: 12/24/2022] Open
Abstract
Dual-emission of the enol-forms and keto-forms of 2-(2′-hydroxyphenyl)oxazoles and their application in OLEDs are investigated.
The photoluminescence (PL) and electroluminescence (EL) properties of two highly efficient excited state intramolecular proton transfer (ESIPT) molecules, 2-(2′-hydroxyphenyl)oxazoles containing one triphenylamine (TPA) (1) and two TPAs (2) respectively, are studied systematically. The enol-forms of both 1 and 2 possess highly hybridized local and charge transfer (HLCT) excited state character, while their excited-state keto-forms are not of obvious HLCT character. A 1-based device exhibits green-white electroluminescence with Commission Internationale d’Eclairage (CIE) coordinates of (0.25, 0.41) and a high external quantum efficiency (EQE) up to 5.3%, which is the highest EQE value recorded for single molecular white light-emitting materials. A 2-based device shows sky-blue emission with CIE coordinates of (0.18, 0.16) and an EQE of 8.0%, which is the highest EQE in the reported HLCT materials. The fluorescence intensities of the enol-forms of 1 and 2 in EL spectra are increased remarkably relative to their PL spectra. Experimental data and theoretical calculations reveal a new ESIPT equilibrium with a reverse intersystem crossing (RISC) process arising from the HLCT character. In EL, the RISC of the enol-form excitons from the triplet state to the singlet state triggers an increase in the number of enol-form singlet excitons, which further leads to a shift of the ESIPT equilibrium towards an enhanced enol-form emission. Thus, the difference between the ESIPT equilibria in PL and EL may be ascribed to the HLCT character of the enol-form excited state.
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Affiliation(s)
- Bijin Li
- Key Laboratory of Green Chemistry and Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , PR China . ;
| | - Linsen Zhou
- Center of Interface Dynamics for Sustainability , Institute of Materials , China Academy of Engineering Physics , 596 Yinhe Road , Chengdu 610200 , PR China
| | - Hu Cheng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , PR China . ;
| | - Quan Huang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , PR China . ;
| | - Jingbo Lan
- Key Laboratory of Green Chemistry and Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , PR China . ;
| | - Liang Zhou
- State Key Laboratory of Rare Earth Resource Utilization , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , 5625 Renmin Street , Changchun 130022 , PR China .
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , PR China . ;
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47
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Zhou N, Wang S, Xiao Y, Li X. A Novel trans
-1-(9-Anthryl)-2-phenylethene Derivative Containing a Phenanthroimidazole Unit for Application in Organic Light-Emitting Diodes. Chem Asian J 2017; 13:81-88. [DOI: 10.1002/asia.201701371] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 10/17/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Nonglin Zhou
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300354 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Shirong Wang
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300354 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Yin Xiao
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300354 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Xianggao Li
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300354 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
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48
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Wang Y, He Z, Chen G, Shan T, Yuan W, Lu P, Zhang Y. D-A structured high efficiency solid luminogens with tunable emissions: Molecular design and photophysical properties. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2017.09.054] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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49
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Chen WC, Yuan Y, Xiong Y, Rogach AL, Tong QX, Lee CS. Aromatically C6- and C9-Substituted Phenanthro[9,10-d]imidazole Blue Fluorophores: Structure-Property Relationship and Electroluminescent Application. ACS APPLIED MATERIALS & INTERFACES 2017; 9:26268-26278. [PMID: 28692277 DOI: 10.1021/acsami.7b06547] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, a series of aromatically substituted phenanthro[9,10-d]imidazole (PI) fluorophores at C6 and C9 (no. 6 and 9 carbon atoms) have been synthesized and systematically characterized by theoretical, thermal, photophysical, electrochemical, and electroluminescent (EL) studies. C6 and C9 modifications have positive influences on the thermal properties of the new materials. Theoretical calculations suggest that the C6 and the C9 positions of PI are electronically different. Theoretical and experimental evidences of intramolecular charge transfer (ICT) between two identical moieties attaching to the C6 and the C9 positions are observed. Photophysical properties of the fluorophores are greatly influenced by size and conjugation extent of the substituents as well as linking steric hindrance. It is found that the C6 and C9 positions afford moderate conjugated extension compared to the C2 modification. Moreover, ICT characteristics of the new fluorophores increase as the size of the substituted aromatic group, and are partially influenced by steric hindrance, with the anthracene and the pyrene derivatives having the strongest ICT excited properties. EL performances of the fluorophores were evaluated as host emitters or dopants in organic light-emitting devices (OLEDs). Most of the devices showed significantly improved efficiencies compared to the OLED using the nonmodified emitter. Among all the devices, a 5 wt % TPI-Py doped device exhibited excellent performances with an external quantum efficiency >5% at 1000 cd/m2 and a deep-blue color index of (0.155, 0.065), which are comparable to the most advanced deep-blue devices. Our study can give useful information for designing C6/C9-modificated PI fluorophores and provide an efficient approach for constructing high-performance deep-blue OLEDs.
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Affiliation(s)
- Wen-Cheng Chen
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, Guangdong P.R. China
| | - Yi Yuan
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University , 243 University Road, Shantou, Guangdong 515063, P.R. China
| | | | | | - Qing-Xiao Tong
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University , 243 University Road, Shantou, Guangdong 515063, P.R. China
| | - Chun-Sing Lee
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, Guangdong P.R. China
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50
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Kumar Konidena R, Justin Thomas KR, Kumar Dubey D, Sahoo S, Jou JH. A new molecular design based on hybridized local and charge transfer fluorescence for highly efficient (>6%) deep-blue organic light emitting diodes. Chem Commun (Camb) 2017; 53:11802-11805. [DOI: 10.1039/c7cc07139f] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A new molecular design featuring a carbazole-derivative as an acceptor and a triphenylamine donor and displaying hybridized local and charge transfer (HLCT) fluorescence is demonstrated.
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Affiliation(s)
- Rajendra Kumar Konidena
- Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee
- India
| | - K. R. Justin Thomas
- Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee
- India
| | - Deepak Kumar Dubey
- Department of Material Science and Engineering, National Tsing Hua University
- Hsinchu
- Taiwan
| | - Snehasis Sahoo
- Department of Material Science and Engineering, National Tsing Hua University
- Hsinchu
- Taiwan
| | - Jwo-Huei Jou
- Department of Material Science and Engineering, National Tsing Hua University
- Hsinchu
- Taiwan
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