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Qu C, Xu Y, Wang Y, Nie Y, Ye K, Zhang H, Zhang Z. Bridging of Cove Regions: A Strategy for Realizing Persistently Chiral Double Heterohelicenes with Attractive Luminescent Properties. Angew Chem Int Ed Engl 2024; 63:e202400661. [PMID: 38333930 DOI: 10.1002/anie.202400661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/06/2024] [Accepted: 02/08/2024] [Indexed: 02/10/2024]
Abstract
The racemization of chiral organic compounds is a common chemical phenomenon. However, it often poses configurational-stability issues to the application of this class of compounds. Achieving chiral organic compounds without the risk of racemization is fascinating, but it is challenging due to a lack of strategies. Here, we reveal the cove-regions bridging strategy for achieving persistently chiral multi-helicenes (incapable of racemization), based on the synthesized proof-of-concept double hetero[4]helicenes featuring macrocycle structures with a small 3D cavity. Additionally, we demonstrate that the strategy is also effective in tuning the electronic structures of multi-helicenes, resulting in a conversion from luminescence silence into thermally activated delayed fluorescence (TADF) for the present system. Furthermore, red circularly polarized TADF based on small double [4]helicene systems is achieved for the first time using this strategy. The disclosed cove-regions bridging strategy provides an opportunity to modulate the electronic structures and luminescent properties of multi-helicenes without concern for racemization, thus significantly enhancing the structural and property diversity of multi-helicenes for various applications.
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Affiliation(s)
- Cheng Qu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Yincai Xu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Yu Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China
| | - Yufang Nie
- South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China
| | - Kaiqi Ye
- 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
| | - Zuolun Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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2
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Murali AC, Nayak P, Nayak S, Das S, Senanayak SP, Venkatasubbaiah K. Boron-Thioketonates: A New Class of S,O-Chelated Boranes as Acceptors in Optoelectronic Devices. Angew Chem Int Ed Engl 2023; 62:e202216871. [PMID: 36650612 DOI: 10.1002/anie.202216871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 01/19/2023]
Abstract
Development of new n-type semiconductors with tunable band gap and dielectric constant has significant implication in dissociating bound charge carrier relevant for demonstrating high performance optoelectronic devices. Boron-β-thioketonates (MTDKB), analogues to boron-β-diketonates containing a sulfur atom in the framework of β-diketones were synthesized. Bulk transport measurement exhibited an outstanding bulk electron mobility of ≈0.003 cm2 V-1 s-1 , which is among the best values reported till date in these class of semiconducting materials and correspondingly a single junction photo responsivity of upto 6 mA W-1 was obtained. This new family of O,S-chelated boron compounds exhibited luminescence in the far red/near-infrared region. The remarkable red shift of 89 nm (fluorescence) observed for 4 a in comparison with analogues boron-β-diketonate signifies the importance of sulfur in these molecules. MTDKBs with amine functionality have also been investigated as an ON/OFF fluorescent sensor.
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Affiliation(s)
- Anna Chandrasekar Murali
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar, 752050, Odisha, India
| | - Prakash Nayak
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar, 752050, Odisha, India
| | - Shashwat Nayak
- School of Physical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar, 752050, Odisha, India
| | - Sabyasachi Das
- School of Physical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar, 752050, Odisha, India
| | - Satyaprasad P Senanayak
- Center for Interdisciplinary Sciences (CIS), National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar, 752050, Odisha, India.,School of Physical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar, 752050, Odisha, India
| | - Krishnan Venkatasubbaiah
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar, 752050, Odisha, India.,Center for Interdisciplinary Sciences (CIS), National Institute of Science Education and Research (NISER), an OCC of Homi Bhabha National Institute, Bhubaneswar, 752050, Odisha, India
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3
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Gao H, Shen S, Qin Y, Liu G, Gao T, Dong X, Pang Z, Xie X, Wang P, Wang Y. Ultrapure Blue Thermally Activated Delayed Fluorescence (TADF) Emitters Based on Rigid Sulfur/Oxygen-Bridged Triarylboron Acceptor: MR TADF and D-A TADF. J Phys Chem Lett 2022; 13:7561-7567. [PMID: 35948077 DOI: 10.1021/acs.jpclett.2c01745] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Organic light-emitting diodes (OLEDs) still face a significant challenge in finding blue thermally activated delayed fluorescence (TADF) emitters that can achieve narrowband emission and high efficiency. In this work, we successfully design and synthesize a novel kind of TADF emitters based on rigid sulfur/oxygen-bridged triarylboron acceptor for ultrapure blue with narrowband electroluminescence. Time-dependent density functional theory (TD-DFT) calculations and photophysical results indicate the different intramolecular charge-transfer (ICT) character of two emitters. Benefiting from the rigid aromatic framework, both emitters exhibited deep-blue emission at 444 and 447 nm with a small full-width at half-maximum (fwhm) of about 33 nm, and a small singlet (S1)-triplet (T1) energy gap (ΔEST) of 0.23 and 0.36 eV. Consequently, OLEDs based on PhCz-TOSBA and TPA-TOSBA exhibit deep blue electroluminescence at 456 nm with fwhm of about 55 nm, affording high external quantum efficiencies (EQEs) of 16.69% with CIE coordinates of (0.14, 0.15) and 16.65% with CIE coordinates of (0.14, 0.12), respectively. These findings show that PhCz-TOSBA and TPA-TOSBA are superior emitters in ultrapure blue TADF devices.
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Affiliation(s)
- Honglei Gao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shaogang Shen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuanyuan Qin
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guanhao Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Teng Gao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangyu Dong
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi Pang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin Xie
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pengfei Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ying Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, and TIPC-CityU Joint Laboratory of Functional Materials and Device, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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4
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Wang M, Zhao CH. Chiral Triarylborane-based Small Organic Molecules for Circularly Polarized Luminescence. CHEM REC 2021; 22:e202100199. [PMID: 34559456 DOI: 10.1002/tcr.202100199] [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: 07/25/2021] [Revised: 09/07/2021] [Accepted: 09/07/2021] [Indexed: 12/19/2022]
Abstract
Circularly polarized luminescence (CPL) has shown promising application potentials in 3D display, optical data storage, smart sensors/probers, CPL lasers, and light source for asymmetric photosynthesis. In the last decade, the CPL-active small organic molecules (CPL-SOMs) have attracted rapidly increasing research interest owing to the great advantages of SOMs, such as high luminescence efficiency, facile modification of chemical structure, fine emission wavelength tuning, precise relationships between structure and properties, and as well as easy fabrication. Promoted by the unique effects of boryl group, such as strong electron-accepting ability, great steric effect, and Lewis acidity to bind with Lewis bases, we herein summarized our recent research results about the creation of CPL-SOMs by modification of chiral scaffolds, such as [2.2]paracyclophane, [5]/[7]helicene, and binaphthyl, with boryl group. The preliminary results have well demonstrated that the chiral triarylborane-based SOMs exhibit promising CPL properties, such as intense CPL in combination of high luminescence dissymmetry factor (|glum |) with high fluorescence efficiency, solvent-induced sign inversion, facile emission wavelength tuning, high fluorescence efficiency in the solid, and substituent-induced sign inversion.
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Affiliation(s)
- Min Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China
| | - Cui-Hua Zhao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China
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Buchwald–Hartwig reaction: an update. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02834-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Tanaka H, Oda S, Ricci G, Gotoh H, Tabata K, Kawasumi R, Beljonne D, Olivier Y, Hatakeyama T. Hypsochromic Shift of Multiple-Resonance-Induced Thermally Activated Delayed Fluorescence by Oxygen Atom Incorporation. Angew Chem Int Ed Engl 2021; 60:17910-17914. [PMID: 34038618 DOI: 10.1002/anie.202105032] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/15/2021] [Indexed: 11/07/2022]
Abstract
Herein, we reported an ultrapure blue multiple-resonance-induced thermally activated delayed fluorescence (MR-TADF) material (ν-DABNA-O-Me) with a high photoluminescence quantum yield and a large rate constant for reverse intersystem crossing. Because of restricted π-conjugation of the HOMO rather than the LUMO induced by oxygen atom incorporation, ν-DABNA-O-Me shows a hypsochromic shift compared to the parent MR-TADF material (ν-DABNA). An organic light-emitting diode based on this material exhibits an emission at 465 nm, with a small full-width at half-maximum of 23 nm and Commission Internationale de l'Eclairage coordinates of (0.13, 0.10), and a high maximum external quantum efficiency of 29.5 %. Moreover, ν-DABNA-O-Me facilitates a drastically improved efficiency roll-off and a device lifetime compared to ν-DABNA, which demonstrates significant potential of the oxygen atom incorporation strategy.
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Affiliation(s)
- Hiroyuki Tanaka
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Susumu Oda
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Gaetano Ricci
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide, Namur Institute of Structured Matter, Université de Namur, Rue de Bruxelles, 61, 5000, Namur, Belgium
| | - Hajime Gotoh
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Keita Tabata
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials, Université de Mons, Place du Parc 20, 7000, Mons, Belgium
| | - Yoann Olivier
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide, Namur Institute of Structured Matter, Université de Namur, Rue de Bruxelles, 61, 5000, Namur, Belgium
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
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7
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Tanaka H, Oda S, Ricci G, Gotoh H, Tabata K, Kawasumi R, Beljonne D, Olivier Y, Hatakeyama T. Hypsochromic Shift of Multiple‐Resonance‐Induced Thermally Activated Delayed Fluorescence by Oxygen Atom Incorporation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105032] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hiroyuki Tanaka
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
- JNC Petrochemical Corporation 5-1 Goi Kaigan Ichihara Chiba 290-8551 Japan
| | - Susumu Oda
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Gaetano Ricci
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide Namur Institute of Structured Matter Université de Namur Rue de Bruxelles, 61 5000 Namur Belgium
| | - Hajime Gotoh
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Keita Tabata
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
- JNC Petrochemical Corporation 5-1 Goi Kaigan Ichihara Chiba 290-8551 Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation 5-1 Goi Kaigan Ichihara Chiba 290-8551 Japan
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials Université de Mons Place du Parc 20 7000 Mons Belgium
| | - Yoann Olivier
- Unité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide Namur Institute of Structured Matter Université de Namur Rue de Bruxelles, 61 5000 Namur Belgium
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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8
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Chen X, Meng G, Liao G, Rauch F, He J, Friedrich A, Marder TB, Wang N, Chen P, Wang S, Yin X. Highly Emissive 9-Borafluorene Derivatives: Synthesis, Photophysical Properties and Device Fabrication. Chemistry 2021; 27:6274-6282. [PMID: 33496983 PMCID: PMC8048904 DOI: 10.1002/chem.202005185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Indexed: 12/15/2022]
Abstract
A series of 9-borafluorene derivatives, functionalised with electron-donating groups, have been prepared. Some of these 9-borafluorene compounds exhibit strong yellowish emission in solution and in the solid state with relatively high quantum yields (up to 73.6 % for FMesB-Cz as a neat film). The results suggest that the highly twisted donor groups suppress charge transfer, but the intrinsic photophysical properties of the 9-borafluorene systems remain. The new compounds showed enhanced stability towards the atmosphere, and exhibited excellent thermal stability, revealing their potential for application in materials science. Organic light-emitting diode (OLED) devices were fabricated with two of the highly emissive compounds, and they exhibited strong yellow-greenish electroluminescence, with a maximum luminance intensity of >22 000 cd m-2 . These are the first two examples of 9-borafluorene derivatives being used as light-emitting materials in OLED devices, and they have enabled us to achieve a balance between maintaining their intrinsic properties while improving their stability.
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Affiliation(s)
- Xing Chen
- Key Laboratory of Cluster ScienceMinistry of Education of ChinaBeijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of Technology102488BeijingP.R. China
| | - Guoyun Meng
- Key Laboratory of Cluster ScienceMinistry of Education of ChinaBeijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of Technology102488BeijingP.R. China
| | - Guanming Liao
- Key Laboratory of Cluster ScienceMinistry of Education of ChinaBeijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of Technology102488BeijingP.R. China
| | - Florian Rauch
- Institut für Anorganische ChemieInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Jiang He
- Institut für Anorganische ChemieInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institut für Anorganische ChemieInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institut für Anorganische ChemieInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Nan Wang
- Key Laboratory of Cluster ScienceMinistry of Education of ChinaBeijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of Technology102488BeijingP.R. China
| | - Pangkuan Chen
- Key Laboratory of Cluster ScienceMinistry of Education of ChinaBeijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of Technology102488BeijingP.R. China
| | - Suning Wang
- Key Laboratory of Cluster ScienceMinistry of Education of ChinaBeijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of Technology102488BeijingP.R. China
- Department of ChemistryQueen's UniversityKingstonONK7L3N6Canada
| | - Xiaodong Yin
- Key Laboratory of Cluster ScienceMinistry of Education of ChinaBeijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of Technology102488BeijingP.R. China
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9
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Paramasivam K, Fialho CB, Cruz TFC, Rodrigues AI, Ferreira B, Gomes CSB, Vila-Viçosa D, Charas A, Esperança JMSS, Vieira Ferreira LF, Calhorda MJ, Maçanita AL, Morgado J, Gomes PT. New luminescent tetracoordinate boron complexes: an in-depth experimental and theoretical characterisation and their application in OLEDs. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00403d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
New luminescent 2-iminopyrrolyl boron complexes with different BX2 moieties are extensively studied via complementary experimental and theoretical methodologies, including application in OLEDs.
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Affiliation(s)
- Krishnamoorthy Paramasivam
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Centre for Environmental Research, Department of Chemistry, Kongu Engineering College, Perundurai, Erode 638 060, India
| | - Carina B. Fialho
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Tiago F. C. Cruz
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Ana I. Rodrigues
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Bruno Ferreira
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Clara S. B. Gomes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- UCIBIO-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Diogo Vila-Viçosa
- BioISI - Biosystems & Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa, Portugal
| | - Ana Charas
- Instituto de Telecomunicações, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - José M. S. S. Esperança
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Luís F. Vieira Ferreira
- BSIRG – Biospectroscopy and Interfaces Research Group, IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Maria José Calhorda
- BioISI - Biosystems & Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa, Portugal
| | - António L. Maçanita
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Jorge Morgado
- Instituto de Telecomunicações, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Pedro T. Gomes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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10
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Kumar A, Shin HY, Lee T, Jung J, Jung BJ, Lee MH. Doubly Boron-Doped TADF Emitters Decorated with ortho-Donor Groups for Highly Efficient Green to Red OLEDs. Chemistry 2020; 26:16793-16801. [PMID: 32779254 DOI: 10.1002/chem.202002968] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Indexed: 12/23/2022]
Abstract
Doubly boron-doped thermally activated delayed fluorescence (TADF) emitters based on a 9,10-diboraanthracene (DBA) acceptor decorated with ortho-donor groups (Cz2oDBA, 2; BuCz2oDBA, 3; DMAC2oDBA, 4) are prepared to realize high-efficiency green-to-red organic light-emitting diodes (OLEDs). X-ray diffraction analyses of 2 and 4 reveal the symmetrical and highly twisted ortho-donor-acceptor-donor (D-A-D) structure of the emitters. The twisted conformation leads to a very small energy splitting (ΔEST <0.08 eV) between the excited singlet and triplet states that gives rise to strong TADF, as supported by theoretical studies. Depending on the strength of the donor moieties, the emission color is fine-tuned in the visible region from green (2) to yellow (3) to red (4). Carbazole-containing 2 and 3 exhibit high photoluminescence quantum yields (PLQYs) approaching 100 %, whereas DMAC-substituted 4 is moderately emissive (PLQY=44 %) in a doped host film. Highly efficient green-to-red TADF-OLEDs are realized with the proposed ortho-D-A-D compounds as emitters. The green and yellow OLEDs incorporating Cz2oDBA (2) and BuCz2oDBA (3) emitters exhibit high external quantum efficiencies (EQEs) of 26.6 % and 21.6 %, respectively. In particular, the green device shows an excellent power efficiency above 100 lm W-1 . A red OLED fabricated with a DMAC2oDBA (4) emitter exhibits a maximum EQE of 10.1 % with an electroluminescence peak at 615 nm.
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Affiliation(s)
- Ajay Kumar
- Department of Chemistry, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Han Young Shin
- Department of Materials Science and Engineering, The University of Seoul, Seoul, 02504, Republic of Korea
| | - Taehwan Lee
- Department of Chemistry, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Jaehoon Jung
- Department of Chemistry, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Byung Jun Jung
- Department of Materials Science and Engineering, The University of Seoul, Seoul, 02504, Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry, University of Ulsan, Ulsan, 44610, Republic of Korea
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11
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Oda S, Kumano W, Hama T, Kawasumi R, Yoshiura K, Hatakeyama T. Carbazole‐Based DABNA Analogues as Highly Efficient Thermally Activated Delayed Fluorescence Materials for Narrowband Organic Light‐Emitting Diodes. Angew Chem Int Ed Engl 2020; 60:2882-2886. [DOI: 10.1002/anie.202012891] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Indexed: 12/17/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Wataru Kumano
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Toshiki Hama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation 5-1 Goi Kaigan, Ichihara Chiba 290-8551 Japan
| | - Kazuki Yoshiura
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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12
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Oda S, Kumano W, Hama T, Kawasumi R, Yoshiura K, Hatakeyama T. Carbazole‐Based DABNA Analogues as Highly Efficient Thermally Activated Delayed Fluorescence Materials for Narrowband Organic Light‐Emitting Diodes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012891] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Wataru Kumano
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Toshiki Hama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Ryosuke Kawasumi
- JNC Petrochemical Corporation 5-1 Goi Kaigan, Ichihara Chiba 290-8551 Japan
| | - Kazuki Yoshiura
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Takuji Hatakeyama
- Department of Chemistry School of Science and Technology Kwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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13
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Rauch F, Endres P, Friedrich A, Sieh D, Hähnel M, Krummenacher I, Braunschweig H, Finze M, Ji L, Marder TB. An Iterative Divergent Approach to Conjugated Starburst Borane Dendrimers. Chemistry 2020; 26:12951-12963. [PMID: 32428359 PMCID: PMC7590090 DOI: 10.1002/chem.202001985] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/13/2020] [Indexed: 12/21/2022]
Abstract
Using a new divergent approach, conjugated triarylborane dendrimers were synthesized up to the 2nd generation. The synthetic strategy consists of three steps: 1) functionalization, via iridium catalyzed C-H borylation; 2) activation, via fluorination of the generated boronate ester with K[HF2 ] or [N(nBu4 )][HF2 ]; and 3) expansion, via reaction of the trifluoroborate salts with aryl Grignard reagents. The concept was also shown to be viable for a convergent approach. All but one of the conjugated borane dendrimers exhibit multiple, distinct and reversible reduction potentials, making them potentially interesting materials for applications in molecular accumulators. Based on their photophysical properties, the 1st generation dendrimers exhibit good conjugation over the whole system. However, the conjugation does not increase further upon expansion to the 2nd generation, but the molar extinction coefficients increase linearly with the number of triarylborane subunits, suggesting a potential application as photonic antennas.
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Affiliation(s)
- Florian Rauch
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Peter Endres
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Daniel Sieh
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Hähnel
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Lei Ji
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Frontiers Science Center for Flexible Electronics (FSCFE)Shaanxi Institute of Flexible Electronics (SIFE) &Shaanxi Institute of Biomedical Materials and Engineering (SIBME)Northwestern Polytechnical University127 West Youryi Road710072Xi'anChina
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry &Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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14
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Rauch F, Fuchs S, Friedrich A, Sieh D, Krummenacher I, Braunschweig H, Finze M, Marder TB. Highly Stable, Readily Reducible, Fluorescent, Trifluoromethylated 9-Borafluorenes. Chemistry 2020; 26:12794-12808. [PMID: 31999019 PMCID: PMC7589458 DOI: 10.1002/chem.201905559] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Indexed: 01/29/2023]
Abstract
Three different perfluoroalkylated borafluorenes (F Bf) were prepared and their electronic and photophysical properties were investigated. The systems have four trifluoromethyl moieties on the borafluorene moiety as well as two trifluoromethyl groups at the ortho positions of their exo-aryl moieties. They differ with regard to the para substituents on their exo-aryl moieties, being a proton (F XylF Bf, F Xyl: 2,6-bis(trifluoromethyl)phenyl), a trifluoromethyl group (F MesF Bf, F Mes: 2,4,6-tris(trifluoromethyl)phenyl) or a dimethylamino group (p-NMe2 -F XylF Bf, p-NMe2 -F Xyl: 4-(dimethylamino)-2,6-bis(trifluoromethyl)phenyl), respectively. All derivatives exhibit extraordinarily low reduction potentials, comparable to those of perylenediimides. The most electron-deficient derivative F MesF Bf was also chemically reduced and its radical anion isolated and characterized. Furthermore, all compounds exhibit very long fluorescent lifetimes of about 250 ns up to 1.6 μs; however, the underlying mechanisms responsible for this differ. The donor-substituted derivative p-NMe2 -F XylF Bf exhibits thermally activated delayed fluorescence (TADF) from a charge-transfer (CT) state, whereas the F MesF Bf and F XylF Bf borafluorenes exhibit only weakly allowed locally excited (LE) transitions due to their symmetry and low transition-dipole moments.
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Affiliation(s)
- Florian Rauch
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Sonja Fuchs
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Daniel Sieh
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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15
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He Z, Liu L, Zhao Z, Mellerup SK, Ge Y, Wang X, Wang N, Wang S. Divergent and Multi-Stage Photoisomerization of Four-Coordinated Boron Compounds with a Naphthyl-Pyridyl/Thiazolyl Backbone. Chemistry 2020; 26:12403-12410. [PMID: 32311174 DOI: 10.1002/chem.202000775] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 04/15/2020] [Indexed: 11/10/2022]
Abstract
Examination of the photoreactivity of a new class of N,C-chelate organoboron compounds, including a series of unsymmetrically substituted boron molecules, B(naph-pyridyl)(Ar1 )(Ar2 ) and B(naph-thiazolyl)(Ar1 )(Ar2 ), led to the discovery of new and divergent photothermal isomerization phenomena. These include the clean and regioselective photoisomerization by unsymmetrical boron, forming borepin isomers, some of which further isomerize to the corresponding boratanorcaradiene diastereomer pairs as a result of the generation of two chiral centers. Significantly, the boratanorcaradienes involving a 3-thienyl substituent on boron were found to thermally convert to BN-fluoranthene annulated borapentalene via an unprecedented reversible boratacyclopropane-boratacyclopentene rearrangement. Changing the pyridyl donor to a thiazolyl donor on the boron was found to provide the B(naph-thiazolyl)(Mes)2 compounds with a distinct new photoisomerization pathway-instead of borepin, forming new blue fluorescent polycyclic azaborinine species. This work illustrates the richness and complexity of boron photochemistry.
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Affiliation(s)
- Zhechang He
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
| | - Lijie Liu
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing, P. R. China
| | - Zhenhui Zhao
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing, P. R. China
| | - Soren K Mellerup
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
| | - Yuxin Ge
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
| | - Xiang Wang
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
| | - Nan Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing, P. R. China
| | - Suning Wang
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
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16
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Rauch F, Krebs J, Günther J, Friedrich A, Hähnel M, Krummenacher I, Braunschweig H, Finze M, Marder TB. Electronically Driven Regioselective Iridium-Catalyzed C-H Borylation of Donor-π-Acceptor Chromophores Containing Triarylboron Acceptors. Chemistry 2020; 26:10626-10633. [PMID: 32510684 PMCID: PMC7497074 DOI: 10.1002/chem.202002348] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/05/2020] [Indexed: 12/11/2022]
Abstract
We observed a surprisingly high electronically driven regioselectivity for the iridium-catalyzed C-H borylation of donor-π-acceptor (D-π-A) systems with diphenylamino (1) or carbazolyl (2) moieties as the donor, bis(2,6-bis(trifluoromethyl)phenyl)boryl (B(F Xyl)2 ) as the acceptor, and 1,4-phenylene as the π-bridge. Under our conditions, borylation was observed only at the sterically least encumbered para-positions of the acceptor group. As boronate esters are versatile building blocks for organic synthesis (C-C coupling, functional group transformations) the C-H borylation represents a simple potential method for post-functionalization by which electronic or other properties of D-π-A systems can be fine-tuned for specific applications. The photophysical and electrochemical properties of the borylated (1-(Bpin)2 ) and unborylated (1) diphenylamino-substituted D-π-A systems were investigated. Interestingly, the borylated derivative exhibits coordination of THF to the boronate ester moieties, influencing the photophysical properties and exemplifying the non-innocence of boronate esters.
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Affiliation(s)
- Florian Rauch
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Johannes Krebs
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Julian Günther
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Hähnel
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maik Finze
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute, for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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17
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Che W, Xie Y, Li Z. Structural Design of Blue‐to‐Red Thermally‐Activated Delayed Fluorescence Molecules by Adjusting the Strength between Donor and Acceptor. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000128] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Weilong Che
- Institute of Molecular Aggregation ScienceTianjin University Tianjin 300072 P. R. China)
| | - Yujun Xie
- Institute of Molecular Aggregation ScienceTianjin University Tianjin 300072 P. R. China)
| | - Zhen Li
- Institute of Molecular Aggregation ScienceTianjin University Tianjin 300072 P. R. China)
- Sauvage Center for Molecular SciencesDepartment of ChemistryWuhan University Wuhan 430072 P. R. China
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18
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Huang Z, Wang S, Dewhurst RD, Ignat'ev NV, Finze M, Braunschweig H. Boron: Its Role in Energy-Related Processes and Applications. Angew Chem Int Ed Engl 2020; 59:8800-8816. [PMID: 31625661 PMCID: PMC7317435 DOI: 10.1002/anie.201911108] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Indexed: 12/21/2022]
Abstract
Boron's unique position in the Periodic Table, that is, at the apex of the line separating metals and nonmetals, makes it highly versatile in chemical reactions and applications. Contemporary demand for renewable and clean energy as well as energy-efficient products has seen boron playing key roles in energy-related research, such as 1) activating and synthesizing energy-rich small molecules, 2) storing chemical and electrical energy, and 3) converting electrical energy into light. These applications are fundamentally associated with boron's unique characteristics, such as its electron-deficiency and the availability of an unoccupied p orbital, which allow the formation of a myriad of compounds with a wide range of chemical and physical properties. For example, boron's ability to achieve a full octet of electrons with four covalent bonds and a negative charge has led to the synthesis of a wide variety of borate anions of high chemical and electrochemical stability-in particular, weakly coordinating anions. This Review summarizes recent advances in the study of boron compounds for energy-related processes and applications.
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Affiliation(s)
- Zhenguo Huang
- School of Civil & Environmental EngineeringUniversity of Technology Sydney81 BroadwayUltimoNSW2007Australia
| | - Suning Wang
- Department of ChemistryQueen's UniversityKingstonOntarioK7L 3N6Canada
| | - Rian D. Dewhurst
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Nikolai V. Ignat'ev
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Merck KGaA64293DarmstadtGermany
| | - Maik Finze
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institute for Inorganic ChemistryJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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19
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Zhao YJ, Ma JP, Fan J, Geng Y, Dong YB. Syntheses and structures of two novel fluorescent metal-organic frameworks generated from a tridentate donor-acceptor motif ligand. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2020; 76:605-615. [PMID: 32499459 DOI: 10.1107/s2053229620006488] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 05/14/2020] [Indexed: 11/10/2022]
Abstract
The tridentate organic ligand 4,4',4''-(4,4,8,8,12,12-hexamethyl-8,12-dihydro-4H-benzo[9,1]quinolizino[3,4,5,6,7-defg]acridine-2,6,10-triyl)tribenzoic acid (H3L) has been synthesized (as the methanol 1.25-solvate, C48H39NO6·1.25CH3OH). As a donor-acceptor motif molecule, H3L possess strong intramolecular charge transfer (ICT) fluorescence. Through hydrogen bonds, H3L molecules construct a two-dimensional (2D) network, which pack together into three-dimensional (3D) networks with an ABC stacking pattern in the crystalline state. Based on H3L and M(NO3)2 salts (M = Cd and Zn) under solvothermal conditions, two metal-organic frameworks (MOFs), namely, catena-poly[[triaquacadmium(II)]-μ-10-(4-carboxyphenyl)-4,4'-(4,4,8,8,12,12-hexamethyl-8,12-dihydro-4H-benzo[9,1]quinolizino[3,4,5,6,7-defg]acridine-2,6-diyl)dibenzoato], [Cd(C48H37NO6)(H2O)3]n, I, and poly[[μ3-4,4',4''-(4,4,8,8,12,12-hexamethyl-8,12-dihydro-4H-benzo[9,1]quinolizino[3,4,5,6,7-defg]acridine-2,6,10-triyl)tribenzoato](μ3-hydroxido)zinc(II)], [Zn2(C48H36NO6)(OH)]n, II, were synthesized. Single-crystal analysis revealed that both MOFs adopt a 3D structure. In I, partly deprotonated HL2- behaves as a bidentate ligand to link a CdII ion to form a one-dimensional chain. In the solid state of I, the existence of weak interactions, such as O-H...O hydrogen bonds and π-π interactions, plays an essential role in aligning 2D nets and 3D networks with AB packing patterns for I. The deprotonated ligand L3- in II is utilized as a tridentate building block to bind ZnII ions to construct 3D networks, where unusual Zn4O14 clusters act as connection nodes. As a donor-acceptor molecule, H3L exhibits fluorescence with a photoluminescence quantum yield (PLQY) of 70% in the solid state. In comparison, the PL of both MOFs is red-shifted with even higher PLQYs of 79 and 85% for I and II, respectively.
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Affiliation(s)
- Yong Jin Zhao
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes Ministry of Education, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Jian Ping Ma
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes Ministry of Education, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Jianzhong Fan
- School of Physics and Electronics, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Yan Geng
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes Ministry of Education, Shandong Normal University, Jinan 250014, People's Republic of China
| | - Yu Bin Dong
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes Ministry of Education, Shandong Normal University, Jinan 250014, People's Republic of China
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Li H, Li J, Liu D, Huang T, Li D. Effects of Electron Affinity and Steric Hindrance of the Trifluoromethyl Group on the π-Bridge in Designing Blue Thermally Activated Delayed Fluorescence Emitters. Chemistry 2020; 26:6899-6909. [PMID: 32212179 DOI: 10.1002/chem.202000926] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/23/2020] [Indexed: 11/05/2022]
Abstract
To explore the correlation of the acceptor electron affinity and the molecular conformation to the thermally activated delayed fluorescence (TADF) feature, a series of d-π-A molecules were designed and synthesized with triazine (Trz) as the acceptor (A) and carbazole (Cz) or tert-butylcarbazole (BuCz) as the donor (D). On the phenylene bridge between D and A, methyl or trifluoromethyl was incorporated close either to D or to A to tune the molecular conformation and the electron-withdrawing ability of acceptor. Both the twist angles and the singlet and triplet energy difference (ΔEST ) were observed strongly dependent on the type and position of the substituent on the π-bridge. Only those molecules with trifluoromethyl locating close to the D side, namely TrzCz-CF3 and TrzBuCz-CF3 , exhibit TADF feature, verifying that both sufficient electron affinity of the A unit and large dihedral angle between D and the π-bridge are necessary to ensure the occurrence of TADF. The blue organic light-emitting diodes fabricated with TrzCz-CF3 and TrzBuCz-CF3 achieved external quantum efficiencies of 9.40 % and 14.22 % with CIE coordinates of (0.19, 0.23) and (0.18, 0.29) respectively. This study provides practical design strategy for blue TADF materials particularly when planar and less crowded group is used as donor.
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Affiliation(s)
- Huiting Li
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China.,College of Chemistry and Materials Science, Inner Mongolia University for the Nationalities (IMUN), Tongliao, 028000, P. R. China
| | - Jiuyan Li
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Di Liu
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Tingting Huang
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Deli Li
- State Key Laboratory of Fine Chemicals, College of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
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21
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Huang Z, Wang S, Dewhurst RD, Ignat'ev NV, Finze M, Braunschweig H. Bor in energiebezogenen Prozessen und Anwendungen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201911108] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zhenguo Huang
- School of Civil & Environmental Engineering University of Technology Sydney 81 Broadway Ultimo NSW 2007 Australien
| | - Suning Wang
- Department of Chemistry Queen's University Kingston Ontario K7L 3N6 Kanada
| | - Rian D. Dewhurst
- Institute for Inorganic Chemistry Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron (ICB) Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Nikolai V. Ignat'ev
- Institute for Inorganic Chemistry Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron (ICB) Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Merck KGaA 64293 Darmstadt Deutschland
| | - Maik Finze
- Institute for Inorganic Chemistry Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron (ICB) Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Holger Braunschweig
- Institute for Inorganic Chemistry Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron (ICB) Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
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22
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Kalluvettukuzhy NK, Pagidi S, Prasad Nandi R, Thilagar P. Exploiting N−H–π Interactions in 2‐(Dimesitylboraneyl)‐1H‐pyrrole for Luminescence Enhancement. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Neena K Kalluvettukuzhy
- Department of Inorganic and physical ChemistryIndian Institute of Science Bangalore 560012 India
| | - Sudhakar Pagidi
- Department of Inorganic and physical ChemistryIndian Institute of Science Bangalore 560012 India
| | - Rajendra Prasad Nandi
- Department of Inorganic and physical ChemistryIndian Institute of Science Bangalore 560012 India
| | - Pakkirisamy Thilagar
- Department of Inorganic and physical ChemistryIndian Institute of Science Bangalore 560012 India
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23
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Jin P, Han Y, Tian F, Wang L, Zhao X, Zhang C, Xiao J. Electron‐Rich Twistacene‐Modified Arylboron Donor–Acceptor Systems: Synthesis, Photophysics, and Electroluminescence with Hot Exciton Response. Chemistry 2020; 26:3113-3118. [DOI: 10.1002/chem.201904590] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Pengcheng Jin
- College of Chemistry and Environmental ScienceKey Laboratory of Chemical Biology of Hebei ProvinceKey Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of EducationHebei University Baoding 071002 P.R. China
| | - Yanbing Han
- Department of PhysicsHarbin Institute of Technology Harbin 150001 P.R. China
| | - Feng Tian
- Institution National–Local Joint Engineering Laboratory of, New Energy Photovoltaic DevicesCollege of Physics Science and TechnologyHebei University Baoding 071002 P.R. China
| | - Lijiao Wang
- College of Chemistry and Environmental ScienceKey Laboratory of Chemical Biology of Hebei ProvinceKey Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of EducationHebei University Baoding 071002 P.R. China
| | - Xiaohui Zhao
- Institution National–Local Joint Engineering Laboratory of, New Energy Photovoltaic DevicesCollege of Physics Science and TechnologyHebei University Baoding 071002 P.R. China
| | - Chunfang Zhang
- College of Chemistry and Environmental ScienceKey Laboratory of Chemical Biology of Hebei ProvinceKey Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of EducationHebei University Baoding 071002 P.R. China
| | - Jinchong Xiao
- College of Chemistry and Environmental ScienceKey Laboratory of Chemical Biology of Hebei ProvinceKey Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of EducationHebei University Baoding 071002 P.R. China
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24
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Belaidi H, Rauch F, Zhang Z, Latouche C, Boucekkine A, Marder TB, Halet J. Insights into the Optical Properties of Triarylboranes with Strongly Electron‐Accepting Bis(fluoromesityl)boryl Groups: when Theory Meets Experiment. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900256] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Houmam Belaidi
- Univ Rennes, CNRSInstitut des Sciences Chimiques de Rennes UMR 6226 35000 Rennes France
| | - Florian Rauch
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Zuolun Zhang
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
- State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin University Qianjin Street Changchun P. R. China
| | - Camille Latouche
- Institut des Matériaux Jean RouxelUniversité de Nantes, CNRS 2 rue de la Houssinière, BP 32229 44322 Nantes cedex 3 France
| | - Abdou Boucekkine
- Univ Rennes, CNRSInstitut des Sciences Chimiques de Rennes UMR 6226 35000 Rennes France
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Jean‐François Halet
- Univ Rennes, CNRSInstitut des Sciences Chimiques de Rennes UMR 6226 35000 Rennes France
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25
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Aoki Y, Toyoda T, Kawasaki H, Takaya H, Sharma AK, Morokuma K, Nakamura M. Iron‐Catalyzed Chemoselective C−N Coupling Reaction: A Protecting‐Group‐Free Amination of Aryl Halides Bearing Amino or Hydroxy Groups. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900641] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Yuma Aoki
- International Research Center for Elements Science Institute for Chemical Research Kyoto University Uji Kyoto 611-0011 Japan
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Kyoto 615-8510 Japan
- Riken Center for Sustainable Resource Science 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Takahiro Toyoda
- International Research Center for Elements Science Institute for Chemical Research Kyoto University Uji Kyoto 611-0011 Japan
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Kyoto 615-8510 Japan
| | - Hiroto Kawasaki
- International Research Center for Elements Science Institute for Chemical Research Kyoto University Uji Kyoto 611-0011 Japan
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Kyoto 615-8510 Japan
| | - Hikaru Takaya
- International Research Center for Elements Science Institute for Chemical Research Kyoto University Uji Kyoto 611-0011 Japan
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Kyoto 615-8510 Japan
| | - Akhilesh K. Sharma
- International Research Center for Elements Science Institute for Chemical Research Kyoto University Uji Kyoto 611-0011 Japan
| | - Keiji Morokuma
- Fukui Institute for Fundamental Chemistry Kyoto University Kyoto 606-8103 Japan
| | - Masaharu Nakamura
- International Research Center for Elements Science Institute for Chemical Research Kyoto University Uji Kyoto 611-0011 Japan
- Department of Energy and Hydrocarbon Chemistry Graduate School of Engineering Kyoto University Kyoto 615-8510 Japan
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26
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Yang W, Krantz KE, Freeman LA, Dickie DA, Molino A, Kaur A, Wilson DJD, Gilliard RJ. Stable Borepinium and Borafluorenium Heterocycles: A Reversible Thermochromic "Switch" Based on Boron-Oxygen Interactions. Chemistry 2019; 25:12512-12516. [PMID: 31334883 DOI: 10.1002/chem.201903348] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Indexed: 12/13/2022]
Abstract
The first examples of N-heterocyclic carbene (NHC) and cyclic(alkyl)(amino) carbene (CAAC) stabilized borepinium and borafluorenium heterocycles are reported herein. The optical properties of the heterocyclic borenium cations were tuned by varying the Lewis base and by changing the number of atoms in the ring. More importantly, functionalizing the cationic boron ring system in the NHC-borafluorenium cation affords a temperature-sensitive molecule with reversible colorimetric "turn off/turn on" properties in solution. Notably, this is the first report of thermochromism in these cationic species. This property, which is mediated by an intermolecular boron-oxygen bond equilibrium, was examined in detail by X-ray crystallography, variable temperature-UV/Vis absorption spectroscopy (VT-UV/Vis), and density functional theory (DFT).
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Affiliation(s)
- Wenlong Yang
- Department of Chemistry, University of Virginia, 409 McCormick Rd./ PO Box 400319, Charlottesville, VA, 22904, USA
| | - Kelsie E Krantz
- Department of Chemistry, University of Virginia, 409 McCormick Rd./ PO Box 400319, Charlottesville, VA, 22904, USA
| | - Lucas A Freeman
- Department of Chemistry, University of Virginia, 409 McCormick Rd./ PO Box 400319, Charlottesville, VA, 22904, USA
| | - Diane A Dickie
- Department of Chemistry, University of Virginia, 409 McCormick Rd./ PO Box 400319, Charlottesville, VA, 22904, USA
| | - Andrew Molino
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, 3086, Victoria, Australia
| | - Aishvaryadeep Kaur
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, 3086, Victoria, Australia
| | - David J D Wilson
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, 3086, Victoria, Australia
| | - Robert J Gilliard
- Department of Chemistry, University of Virginia, 409 McCormick Rd./ PO Box 400319, Charlottesville, VA, 22904, USA
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Jia X, Nitsch J, Ji L, Wu Z, Friedrich A, Kerner F, Moos M, Lambert C, Marder TB. Triarylborane-Based Helical Donor-Acceptor Compounds: Synthesis, Photophysical, and Electronic Properties. Chemistry 2019; 25:10845-10857. [PMID: 31210396 DOI: 10.1002/chem.201902258] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Indexed: 01/12/2023]
Abstract
The synthesis and characterization of 10-(dimesitylboryl)-N,N-di-p-tolylbenzo[c]phenanthren-4-amine (3-B(Mes)2 -[4]helix-9-N(p-Tol)2 1) and 13-(dimesitylboryl)-N,N-di-p-tolyldibenzo[c,g]phenanthren-8-amine (3-B(Mes)2 -[5]helix-12-N(p-Tol)2 2) are reported herein. Their electrochemical and photophysical properties have been studied experimentally and theoretically. The donor and acceptor-substituted helicene derivatives exhibit moderate fluorescence quantum yields in THF (Φf =0.48 and 0.61 for 1 and 2, respectively), which are higher than unsubstituted ones (Φf =0.18 for [4]helicene; Φf <0.05 for [n]helicenes (n≥5)). In the solid state, the Φf values are higher (Φf =1.00 and 0.55 for 1 and 2, respectively) than those in solution, most likely due to the restrictions of molecular motions. The S1 ←S0 transitions of 1 and 2 are predominately HOMO→LUMO transitions. Upon excitation with UV light, the interplanar angle between the two terminal aryl rings of the [5]helix core of 2 decreases (S1 state compared with S0 state), which is similar to placing a spring under an external force.
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Affiliation(s)
- Xiangqing Jia
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jörn Nitsch
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Lei Ji
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Zhu Wu
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Florian Kerner
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Michael Moos
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Christoph Lambert
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Todd B Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, and Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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Li P, Chan H, Lai S, Ng M, Chan M, Yam VW. Four‐Coordinate Boron Emitters with Tridentate Chelating Ligand for Efficient and Stable Thermally Activated Delayed Fluorescence Organic Light‐Emitting Devices. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903332] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Panpan Li
- Institute of Molecular Functional Materials [Areas of Excellence SchemeUniversity Grants Committee (HongKong)] and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong P.R.China
| | - Hing Chan
- Institute of Molecular Functional Materials [Areas of Excellence SchemeUniversity Grants Committee (HongKong)] and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong P.R.China
| | - Shiu‐Lun Lai
- Institute of Molecular Functional Materials [Areas of Excellence SchemeUniversity Grants Committee (HongKong)] and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong P.R.China
| | - Maggie Ng
- Institute of Molecular Functional Materials [Areas of Excellence SchemeUniversity Grants Committee (HongKong)] and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong P.R.China
| | - Mei‐Yee Chan
- Institute of Molecular Functional Materials [Areas of Excellence SchemeUniversity Grants Committee (HongKong)] and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong P.R.China
| | - Vivian Wing‐Wah Yam
- Institute of Molecular Functional Materials [Areas of Excellence SchemeUniversity Grants Committee (HongKong)] and Department of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong P.R.China
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29
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Li P, Chan H, Lai SL, Ng M, Chan MY, Yam VWW. Four-Coordinate Boron Emitters with Tridentate Chelating Ligand for Efficient and Stable Thermally Activated Delayed Fluorescence Organic Light-Emitting Devices. Angew Chem Int Ed Engl 2019; 58:9088-9094. [PMID: 31050130 DOI: 10.1002/anie.201903332] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/14/2019] [Indexed: 11/06/2022]
Abstract
A new class of four-coordinate donor-acceptor fluoroboron-containing thermally activated delayed fluorescence (TADF) compounds bearing a tridentate 2,2'-(pyridine-2,6-diyl)diphenolate (dppy) ligand has been successfully designed and synthesized. Upon varying the donor moieties from carbazole to 10H-spiro[acridine-9,9'-fluorene] to 9,9-dimethyl-9,10-dihydroacridine, these boron derivatives exhibit a wide range of emission colors spanning from blue to yellow with a large spectral shift of 2746 cm-1 , with high PLQYs of up to 96 % in the doped thin film. Notably, vacuum-deposited organic light-emitting devices (OLEDs) made with these boron compounds demonstrate high performances with the best current efficiencies of 55.7 cd A-1 , power efficiencies of 58.4 lm W-1 and external quantum efficiencies of 18.0 %. More importantly, long operational stabilities of the green-emitting OLEDs based on 2 with half-lifetimes of up to 12 733 hours at an initial luminance of 100 cd m-2 have been realized. This work represents for the first time the design and synthesis of tridentate dppy-chelating four-coordinate boron TADF compounds for long operational stabilities, suggesting great promises for the development of stable boron-containing TADF emitters.
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Affiliation(s)
- Panpan Li
- Institute of Molecular Functional Materials [Areas of Excellence Scheme, University Grants Committee (HongKong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R.China
| | - Hing Chan
- Institute of Molecular Functional Materials [Areas of Excellence Scheme, University Grants Committee (HongKong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R.China
| | - Shiu-Lun Lai
- Institute of Molecular Functional Materials [Areas of Excellence Scheme, University Grants Committee (HongKong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R.China
| | - Maggie Ng
- Institute of Molecular Functional Materials [Areas of Excellence Scheme, University Grants Committee (HongKong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R.China
| | - Mei-Yee Chan
- Institute of Molecular Functional Materials [Areas of Excellence Scheme, University Grants Committee (HongKong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R.China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials [Areas of Excellence Scheme, University Grants Committee (HongKong)] and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R.China
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Nishida JI, Kawakami Y, Yamamoto S, Matsui Y, Ikeda H, Hirao Y, Kawase T. Synthesis and Photophysical Studies of Dibenzophosphole Oxides with D-A-D Triad Structures. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900189] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jun-ichi Nishida
- Department of Applied Chemistry; Graduate School of Engineering; University of Hyogo; 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Yoshihiro Kawakami
- Department of Applied Chemistry; Graduate School of Engineering; University of Hyogo; 2167 Shosha, Himeji, Hyogo 671-2280 Japan
| | - Shun Yamamoto
- Department of Applied Chemistry; Graduate School of Engineering; Osaka Prefecture University; 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531 Japan
| | - Yasunori Matsui
- Department of Applied Chemistry; Graduate School of Engineering; Osaka Prefecture University; 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531 Japan
- The Research Institute for Molecular Electronic Devices (RIMED); Graduate School of Engineering; Osaka Prefecture University, 11 Gakuen-cho, Naka-ku, Sakai, Osaka; 599-8531 Japan
| | - Hiroshi Ikeda
- Department of Applied Chemistry; Graduate School of Engineering; Osaka Prefecture University; 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531 Japan
- The Research Institute for Molecular Electronic Devices (RIMED); Graduate School of Engineering; Osaka Prefecture University, 11 Gakuen-cho, Naka-ku, Sakai, Osaka; 599-8531 Japan
| | - Yasukazu Hirao
- Department of Chemistry; Graduate School of Science; Osaka University; 560-0043 Japan
| | - Takeshi Kawase
- Department of Applied Chemistry; Graduate School of Engineering; University of Hyogo; 2167 Shosha, Himeji, Hyogo 671-2280 Japan
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Beldjoudi Y, Arauzo A, Campo J, Gavey EL, Pilkington M, Nascimento MA, Rawson JM. Structural, Magnetic, and Optical Studies of the Polymorphic 9'-Anthracenyl Dithiadiazolyl Radical. J Am Chem Soc 2019; 141:6875-6889. [PMID: 30875208 DOI: 10.1021/jacs.8b11528] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The fluorescent 9'-anthracenyl-functionalized dithiadiazolyl radical (3) exhibits four structurally determined crystalline phases, all of which are monomeric in the solid state. Polymorph 3α (monoclinic P21/ c, Z' = 2) is isolated when the radical is condensed onto a cold substrate (enthalpically favored polymorph), whereas 3β (orthorhombic P21 21 21, Z' = 3) is collected on a warm substrate (entropically favored polymorph). The α and β polymorphs exhibit chemically distinct structures with 3α exhibiting face-to-face π-π interactions between anthracenyl groups, while 3β exhibits edge-to-face π-π interactions. 3α undergoes an irreversible conversion to 3β on warming to 120 °C (393 K). The β-phase undergoes a series of reversible solid-state transformations on cooling; below 300 K a phase transition occurs to form 3γ (monoclinic P21/ c, Z' = 1), and on further cooling below 165 K, a further transition is observed to 3δ (monoclinic P21/ n, Z' = 2). Both 3β → 3γ and 3γ → 3δ transitions are reversible (single-crystal X-ray diffraction), and the 3γ → 3δ process exhibits thermal hysteresis with a clear feature observed by heat capacity measurements. Heating 3β above 160 °C generates a fifth polymorph (3ε) which is distinct from 3α-3δ based on powder X-ray diffraction data. The magnetic behavior of both 3α and the 3β/3γ/3δ system reflect an S = 1/2 paramagnet with weak antiferromagnetic coupling. The reversible 3δ ↔ 3γ phase transition exhibits thermal hysteresis of 20 K. Below 50 K, the value of χm T for 3δ approaches 0 emu·K·mol-1 consistent with formation of a gapped state with an S = 0 ground-state configuration. In solution, both paramagnetic 3 and diamagnetic [3][GaCl4] exhibit similar absorption and emission profiles reflecting similar absorption and emission mechanisms for paramagnetic and diamagnetic forms. Both emit in the deep-blue region of the visible spectrum (λem ∼ 440 nm) upon excitation at 255 nm with quantum yields of 4% (3) and 30% ([3][GaCl4]) affording a switching ratio [ΦF(3+)/ΦF(3)] of 7.5 in quantum efficiency with oxidation state. Solid-state films of both 3 and [3][GaCl4] exhibit emission bands at a longer wavelength (490 nm) attributed to excimer emission.
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Affiliation(s)
- Yassine Beldjoudi
- Department of Chemistry and Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , Ontario N9B 3P4 , Canada
| | - Ana Arauzo
- Departamento de Física de la Materia Condensada, Facultad de Ciencias, and Instituto de Ciencia de Materiales de Aragon , CSIC-Universidad de Zaragoza , E-50009 Zaragoza , Spain
| | - Javier Campo
- Departamento de Física de la Materia Condensada, Facultad de Ciencias, and Instituto de Ciencia de Materiales de Aragon , CSIC-Universidad de Zaragoza , E-50009 Zaragoza , Spain
| | - Emma L Gavey
- Department of Chemistry , Brock University , 500 Glenridge Avenue , St. Catharines , Ontario L2S 3A1 , Canada
| | - Melanie Pilkington
- Department of Chemistry , Brock University , 500 Glenridge Avenue , St. Catharines , Ontario L2S 3A1 , Canada
| | - Mitchell A Nascimento
- Department of Chemistry and Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , Ontario N9B 3P4 , Canada
| | - Jeremy M Rawson
- Department of Chemistry and Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , Ontario N9B 3P4 , Canada
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Lian H, Shen J, Guo H, Cheng X, Dong Q, Yang J, Wong WY. Recent Advances in the Optimization of Organic Light-Emitting Diodes with Metal-Containing Nanomaterials. CHEM REC 2019; 19:1753-1767. [PMID: 30946533 DOI: 10.1002/tcr.201800204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Indexed: 11/07/2022]
Abstract
Metal-containing nanomaterials have attracted widespread attention in recent years due to their physicochemical, light-scattering and plasmonic properties. By introducing different kinds and different structures of metal-containing nanomaterials into organic light-emitting diodes (OLEDs), the optical properties of the devices can be tailored, which can effectively improve the luminous efficiency of OLEDs. In this review, the fundamental knowledge of OLEDs and metallic nanomaterials were firstly introduced. Then we overviewed the recent development of the optimization of OLEDs through introducing different kinds of metal-containing nanomaterials.
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Affiliation(s)
- Hong Lian
- MOE Key Laboratory of Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan, 030024, P. R. China
| | - Jiahao Shen
- MOE Key Laboratory of Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan, 030024, P. R. China
| | - Hongen Guo
- MOE Key Laboratory of Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan, 030024, P. R. China
| | - Xiaozhe Cheng
- MOE Key Laboratory of Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan, 030024, P. R. China
| | - Qingchen Dong
- MOE Key Laboratory of Interface Science and Engineering in Advanced Materials and Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, 79 Yingze West Street, Taiyuan, 030024, P. R. China
| | - Jianhai Yang
- Xi'an Research Institute of Hi-Tech, Xi'an, 710025, China
| | - Wai-Yeung Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
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Liang X, Tu ZL, Zheng YX. Thermally Activated Delayed Fluorescence Materials: Towards Realization of High Efficiency through Strategic Small Molecular Design. Chemistry 2019; 25:5623-5642. [PMID: 30648301 DOI: 10.1002/chem.201805952] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Indexed: 12/22/2022]
Abstract
Thermally activated delayed fluorescence (TADF) is one of the most intriguing and promising discoveries towards realization of highly-efficient organic light emitting diodes (OLED) utilizing small molecules as emitters. It has the capability of manifesting all excitons generated during the electroluminescent processes, consequently achieving 100 % of internal quantum efficiency. Since the report of the first efficient OLED based on a TADF small molecule in 2012 by Adachi et al., the quest for optimal TADF materials for OLED application has never stopped. Various TADF molecules bearing different design concepts and strategies have been designed and produced, with the aim to boost the overall performances of corresponding OLEDs. In this minireview, the general principles of TADF molecular design based on three basic categories of TADF species: twisted intramolecular charge transfer (TICT), through-space charge transfer (TSCT) and multi-resonance induced TADF (MR-TADF) are discussed in detail. Several key aspects with respect to each category, as well as some effective methods to enhance the efficiency of TADF materials and corresponding OLEDs from the molecular engineering perspectives, are summarized and discussed to exhibit a general landscape of TADF molecular design to a wide variety of scientific researchers within this particular disciplinary area.
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Affiliation(s)
- Xiao Liang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Zhen-Long Tu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - You-Xuan Zheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
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Yang Y, Li K, Wang C, Zhan H, Cheng Y. Effect of a Pendant Acceptor on Thermally Activated Delayed Fluorescence Properties of Conjugated Polymers with Backbone-Donor/Pendant-Acceptor Architecture. Chem Asian J 2019; 14:574-581. [PMID: 30632280 DOI: 10.1002/asia.201801813] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/06/2019] [Indexed: 02/02/2023]
Abstract
Three sets of conjugated polymers with backbone-donor/pendant-acceptor architectures, named PCzA3PyB, PCzAB2Py, and PCzAB3Py, are designed and synthesized. The three isomeric benzoylpyridine-based pendant acceptor groups are 6-benzoylpyridin-3-yl (3PyB), 4-((pyridin-2-yl)carbonyl)phenyl (B2Py) and 4-((pyridin-3-yl)carbonyl)phenyl (B3Py), whereas the identical backbone consists of 3,6-carbazolyl and 2,7-acridinyl rings. One acridine ring and each acceptor group constitute a definite thermally activated delayed fluorescence (TADF) unit, incorporated into the main chain of the polymers through the 2,7-position of the acridine ring with the varied content. All of the polymers display legible TADF features with a short microsecond-scale delayed lifetime (0.56-1.62 μs) and a small singlet/triplet energy gap (0.10-0.19 eV). Progressively redshifted emissions are observed in the order PCzAB3Py, PCzA3PyB, and PCzAB2Py owing to the different substitution patterns of the pyridyl group. Photoluminescence quantum yields can be improved by regulating the molar content of the TADF unit in the range 0.5-50 %. The non-doped organic light-emitting devices (OLEDs) fabricated by solution-processing technology emit yellow-green to orange light. The polymers with 5 mol % of the TADF unit exhibit excellent comprehensive electroluminescence performance, in which PCzAB2Py5 achieves a maximum external quantum efficiency (EQE) of 11.9 %, low turn-on voltage of 3.0 V, yellow emission with a wavelength of 573 nm and slow roll-off with EQE of 11.6 % at a luminance of 1000 cd m-2 and driving voltage of 5.5 V.
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Affiliation(s)
- Yike Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Kuofei Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Chenxu Wang
- Public Technical Service Center, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, P.R. China
| | - Hongmei Zhan
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China
| | - Yanxiang Cheng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China
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Oda S, Abe H, Yasuda N, Hatakeyama T. Synthesis of Tetracoordinate Boron‐Fused Benzoaceanthrylene Analogs via Tandem Electrophilic C−H Borylation. Chem Asian J 2019; 14:1657-1661. [DOI: 10.1002/asia.201801682] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/07/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hiroaki Abe
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI) 1-1-1, Kouto Sayo-cho, Sayo-gun Hyogo 679-5198 Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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Jin JL, Gao Y, Geng Y. A theoretical investigation on the thermally activated delayed fluorescence characteristics of the isomers of DTCBPy. J Mol Graph Model 2018; 86:125-131. [PMID: 30359858 DOI: 10.1016/j.jmgm.2018.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 10/02/2018] [Accepted: 10/03/2018] [Indexed: 01/09/2023]
Abstract
It has been reported that 3, 5-bis(3,6-di-tert-butyl-9H-carbazol-9-yl)-phenyl)(pyridin-4-yl)meth (DTCBPy) is an efficient thermally activated delayed fluorescence (TADF) molecule. We designed a series of the isomeric molecules (2-5) of DTCBPy (1) by changing the position of nitrogen atom in the acceptor and the substituent position of donor units. The highest occupied molecular orbitals (HOMO) of 1-5 are all delocalized over the donor units, and the lowest unoccupied molecular orbitals (LUMO) are located on the acceptor unit. As expected from frontier molecular orbital analysis, the singlet-triplet energy splitting (ΔEST) values of 1-5 are in a small range from 0.087 to 0.147 eV, indicating the easy realization of reverse intersystem crossing from the lowest triplet to singlet excited states. However, the structural modification has a significant influence on the fluorescence radiative rate (kr), which varies from 3.49× 106 to 2.04 × 107 s-1 for 1-5. This work is expected to provide valuable information for synthesizing highly efficient TADF materials based on DTCBPy.
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Affiliation(s)
- Jun-Ling Jin
- Hunan Province Cooperative Innovation Center for the Construction & Development of Dongting Lake Ecological Economic Zone, College of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde, 415000, Hunan, PR China
| | - Ying Gao
- Jilin Engineering Normal University, Changchun, 130052, PR China
| | - Yun Geng
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, PR China.
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Nghia NV, Jana S, Sujith S, Ryu JY, Lee J, Lee SU, Lee MH. Nido-Carboranes: Donors for Thermally Activated Delayed Fluorescence. Angew Chem Int Ed Engl 2018; 57:12483-12488. [PMID: 30091167 DOI: 10.1002/anie.201806922] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/07/2018] [Indexed: 11/09/2022]
Abstract
An approach to the design of nido-carborane-based luminescent compounds that can exhibit thermally activated delayed fluorescence (TADF) is proposed. 7,8-Dicarba-nido-undecaboranes (nido-carboranes) having various 8-R groups (R=H, Me, i-Pr, Ph) are appended to the meta or para position of the phenyl ring of the dimesitylphenylborane (PhBMes2 ) acceptor, forming donor-acceptor compounds (nido-m1-m4 and nido-p1-p4). The bulky 8-R group and meta substitution of the nido-carborane are essential to attain a highly twisted arrangement between the donor and acceptor moieties, leading to a very small energy splitting between the singlet and triplet excited states (ΔEST <0.05 eV for nido-m2, -m3, and -p3). These compounds exhibit efficient TADF with microsecond-range lifetimes. In particular, nido-m2 and -m3 display aggregation-induced emission (AIE) with TADF properties.
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Affiliation(s)
- Nguyen Van Nghia
- Department of Chemistry and EHSRC, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Saibal Jana
- Department of Bionano Technology, Department of Chemical and Molecular Engineering, Hanyang University, Ansan, 15588, Republic of Korea
| | - Surendran Sujith
- Department of Chemistry and EHSRC, University of Ulsan, Ulsan, 44610, Republic of Korea
| | - Ji Yeon Ryu
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Sang Uck Lee
- Department of Bionano Technology, Department of Chemical and Molecular Engineering, Hanyang University, Ansan, 15588, Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry and EHSRC, University of Ulsan, Ulsan, 44610, Republic of Korea
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Nghia NV, Jana S, Sujith S, Ryu JY, Lee J, Lee SU, Lee MH. Nido
-Carboranes: Donors for Thermally Activated Delayed Fluorescence. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806922] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nguyen Van Nghia
- Department of Chemistry and EHSRC; University of Ulsan; Ulsan 44610 Republic of Korea
| | - Saibal Jana
- Department of Bionano Technology; Department of Chemical and Molecular Engineering; Hanyang University; Ansan 15588 Republic of Korea
| | - Surendran Sujith
- Department of Chemistry and EHSRC; University of Ulsan; Ulsan 44610 Republic of Korea
| | - Ji Yeon Ryu
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
| | - Junseong Lee
- Department of Chemistry; Chonnam National University; Gwangju 61186 Republic of Korea
| | - Sang Uck Lee
- Department of Bionano Technology; Department of Chemical and Molecular Engineering; Hanyang University; Ansan 15588 Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry and EHSRC; University of Ulsan; Ulsan 44610 Republic of Korea
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39
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Lik A, Jenthra S, Fritze L, Müller L, Truong KN, Helten H. From Monodisperse Thienyl- and Furylborane Oligomers to Polymers: Modulating the Optical Properties through the Hetarene Ratio. Chemistry 2018. [PMID: 29543358 DOI: 10.1002/chem.201706124] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The application of our newly developed B-C coupling method by catalytic Si/B exchange is demonstrated for the synthesis of a series of triarylboranes (1), monodisperse thienyl- and furylborane dimers (2) and trimers (9), extended oligomers (3) and polymers (3'), as well as mixed (oligo)thienyl-/furylboranes. The structures of 1 aaTip , 1 bbTip , and 2 bbbMes* , determined by X-ray crystallography, reveal largely coplanar hetarene rings and BR3 environments, which are most pronounced in the furylborane species. Photophysical investigations, supported by TD-DFT calculations, revealed pronounced π-electron delocalization over the hetarene backbones including the boron centers. With an extended series of derivatives of varying chain lengths available, we were able to determine the effective conjugation lengths (ECL) of poly(thienylborane)s and poly(furylborane)s, which have been reached with the highest-molecular-weight derivatives of our study. Through variation of the furan-to-thiophene ratio, the photophysical properties of these materials are effectively modulated. Significantly, higher furan contents lead to considerably increased fluorescence intensities. Compounds 1 aaTip , 1 bbTip , and 3 aTip showed the ability to bind fluoride anions. The binding process is signaled by a distinct change in their optical absorption characteristics, thus rendering these materials attractive targets for sensory applications.
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Affiliation(s)
- Artur Lik
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Sangeth Jenthra
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Lars Fritze
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Lars Müller
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Khai-Nghi Truong
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
| | - Holger Helten
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056, Aachen, Germany
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Beldjoudi Y, Nascimento MA, Cho YJ, Yu H, Aziz H, Tonouchi D, Eguchi K, Matsushita MM, Awaga K, Osorio-Roman I, Constantinides CP, Rawson JM. Multifunctional Dithiadiazolyl Radicals: Fluorescence, Electroluminescence, and Photoconducting Behavior in Pyren-1'-yl-dithiadiazolyl. J Am Chem Soc 2018; 140:6260-6270. [PMID: 29688006 DOI: 10.1021/jacs.7b12592] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The pyren-1'-yl-functionalized dithiadiazolyl (DTDA) radical, C16H9CNSSN (1), is monomeric in solution and exhibits fluorescence in the deep-blue region of the visible spectrum (440 nm) upon excitation at 241 nm. The salt [1][GaCl4] exhibits similar emission, reflecting the largely spectator nature of the radical in the fluorescence process, although the presence of the radical leads to a modest quenching of emission (ΦF = 98% for 1+ and 50% for 1) through enhancement of non-radiative decay processes. Time-dependent density functional theory studies on 1 coupled with the similar emission profiles of both 1+ and 1 are consistent with the initial excitation being of predominantly pyrene π-π* character. Spectroscopic studies indicate stabilization of the excited state in polar media, with the fluorescence lifetime for 1 (τ = 5 ns) indicative of a short-lived excited state. Comparative studies between the energies of the frontier orbitals of pyren-1'-yl nitronyl nitroxide (2, which is not fluorescent) and 1 reveal that the energy mismatch and poor spatial overlap between the DTDA radical SOMO and the pyrene π manifold in 1 efficiently inhibit the non-radiative electron-electron exchange relaxation pathway previously described for 2. Solid-state films of both 1 and [1][GaCl4] exhibit broad emission bands at 509 and 545 nm, respectively. Incorporation of 1 within a host matrix for OLED fabrication revealed electroluminescence, with CIE coordinates of (0.205, 0.280) corresponding to a sky-blue emission. The brightness of the device reached 1934 cd/m2 at an applied voltage of 16 V. The crystal structure of 1 reveals a distorted π-stacked motif with almost regular distances between the pyrene rings but alternating long-short contacts between DTDA radicals. Solid state measurements on a thin film of 1 reveal emission occurs at shorter wavelengths (375 nm) whereas conductivity measurements on a single crystal of 1 show a photoconducting response at longer wavelength excitation (455 nm).
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Affiliation(s)
- Yassine Beldjoudi
- Department of Chemistry & Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , ON N9B 3P4 , Canada
| | - Mitchell A Nascimento
- Department of Chemistry & Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , ON N9B 3P4 , Canada
| | - Yong Joo Cho
- Department of Electrical & Computer Engineering, Waterloo Institute of Nanotechnology , University of Waterloo , 200 University Avenue West , Waterloo , ON N2L 3G1 , Canada
| | - Hyeonghwa Yu
- Department of Electrical & Computer Engineering, Waterloo Institute of Nanotechnology , University of Waterloo , 200 University Avenue West , Waterloo , ON N2L 3G1 , Canada
| | - Hany Aziz
- Department of Electrical & Computer Engineering, Waterloo Institute of Nanotechnology , University of Waterloo , 200 University Avenue West , Waterloo , ON N2L 3G1 , Canada
| | - Daiki Tonouchi
- Department of Chemistry & Integrated Research Consortium on Chemical Sciences (IRCCS) , The University of Nagoya , Furo-Cho, Chikusa-Ku , Nagoya City , Aichi 464-8602 , Japan
| | - Keitaro Eguchi
- Department of Chemistry & Integrated Research Consortium on Chemical Sciences (IRCCS) , The University of Nagoya , Furo-Cho, Chikusa-Ku , Nagoya City , Aichi 464-8602 , Japan
| | - Michio M Matsushita
- Department of Chemistry & Integrated Research Consortium on Chemical Sciences (IRCCS) , The University of Nagoya , Furo-Cho, Chikusa-Ku , Nagoya City , Aichi 464-8602 , Japan
| | - Kunio Awaga
- Department of Chemistry & Integrated Research Consortium on Chemical Sciences (IRCCS) , The University of Nagoya , Furo-Cho, Chikusa-Ku , Nagoya City , Aichi 464-8602 , Japan
| | - Igor Osorio-Roman
- Department of Chemistry & Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , ON N9B 3P4 , Canada
| | - Christos P Constantinides
- Department of Chemistry , North Caroline State University , 2620 Yarbrough Drive, Box 8204 , Raleigh , North Carolina 27695 , United States
| | - Jeremy M Rawson
- Department of Chemistry & Biochemistry , University of Windsor , 401 Sunset Avenue , Windsor , ON N9B 3P4 , Canada
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Wang K, Zheng CJ, Liu W, Liang K, Shi YZ, Tao SL, Lee CS, Ou XM, Zhang XH. Avoiding Energy Loss on TADF Emitters: Controlling the Dual Conformations of D-A Structure Molecules Based on the Pseudoplanar Segments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29. [PMID: 29116652 DOI: 10.1002/adma.201701476] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 09/07/2017] [Indexed: 05/06/2023]
Abstract
The recent introduction of thermally activated delayed fluorescence (TADF) emitters is regarded as an important breakthrough for the development of high efficiency organic light-emitting devices (OLEDs). The planar D and A groups are generally used to construct TADF emitters for their rigid structure and large steric hindrance. In this work, it is shown that many frequently used nonaromatic (noncontinuous conjugation or without satisfying Hückel's rule) planar segments, such as 9,9-dimethyl-9,10-dihydroacridine, are actually pseudoplanar segments and have two possible conformations-a planar form and a crooked form. Molecules constructed from pseudoplanar segments can thus have two corresponding conformations. Their existence can have significant impact on the performance of many TADF emitters. Two design strategies are presented for addressing the problem by either (1) increasing the rigidity of these groups to suppress its crooked form or (2) increasing the steric hindrance of the linked group to minimize energy of the emitters with the highly twisted form. Following these strategies, two new emitters are synthesized accordingly and successfully applied in OLEDs demonstrating high external quantum efficiencies (20.2% and 18.3%).
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Affiliation(s)
- Kai Wang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, Sichuan, 610054, P. R. China
- Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Cai-Jun Zheng
- School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, Sichuan, 610054, P. R. China
- Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Wei Liu
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Ke Liang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Yi-Zhong Shi
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Si-Lu Tao
- School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, Sichuan, 610054, 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
| | - Xue-Mei Ou
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Xiao-Hong Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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42
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Geng Y, D'Aleo A, Inada K, Cui LS, Kim JU, Nakanotani H, Adachi C. Donor-σ-Acceptor Motifs: Thermally Activated Delayed Fluorescence Emitters with Dual Upconversion. Angew Chem Int Ed Engl 2017; 56:16536-16540. [PMID: 29105906 DOI: 10.1002/anie.201708876] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Indexed: 11/09/2022]
Abstract
A family of organic emitters with a donor-σ-acceptor (D-σ-A) motif is presented. Owing to the weakly coupled D-σ-A intramolecular charge-transfer state, a transition from the localized excited triplet state (3 LE) and charge-transfer triplet state (3 CT) to the charge-transfer singlet state (1 CT) occurred with a small activation energy and high photoluminescence quantum efficiency. Two thermally activated delayed fluorescence (TADF) components were identified, one of which has a very short lifetime of 200-400 ns and the other a longer TADF lifetime of the order of microseconds. In particular, the two D-σ-A materials presented strong blue emission with TADF properties in toluene. These results will shed light on the molecular design of new TADF emitters with short delayed lifetimes.
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Affiliation(s)
- Yan Geng
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, P. R. China
| | - Anthony D'Aleo
- Aix-Marseille Université, CNRS, CINaM UMR 7325, Campus de Luminy, Case 913, 13288, Marseille, France.,Center for Quantum Nanoscience, Institute for Basic Science, Seoul 03760, Republic of Korea
| | - Ko Inada
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Lin-Song Cui
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Jong Uk Kim
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,Japan Science and Technology Agency, ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,Japan Science and Technology Agency, ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
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43
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Geng Y, D'Aleo A, Inada K, Cui L, Kim JU, Nakanotani H, Adachi C. Donor–σ–Acceptor Motifs: Thermally Activated Delayed Fluorescence Emitters with Dual Upconversion. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708876] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yan Geng
- Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- College of Chemistry, Chemical Engineering and Materials Science Shandong Normal University Jinan 250014 P. R. China
| | - Anthony D'Aleo
- Aix-Marseille Université CNRS, CINaM UMR 7325 Campus de Luminy, Case 913 13288 Marseille France
- Center for Quantum Nanoscience Institute for Basic Science Seoul 03760 Republic of Korea
| | - Ko Inada
- Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Lin‐Song Cui
- Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Jong Uk Kim
- Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- Japan Science and Technology Agency ERATO Adachi Molecular Exciton Engineering Project 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- Japan Science and Technology Agency ERATO Adachi Molecular Exciton Engineering Project 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan
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44
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Chen XL, Jia JH, Yu R, Liao JZ, Yang MX, Lu CZ. Combining Charge-Transfer Pathways to Achieve Unique Thermally Activated Delayed Fluorescence Emitters for High-Performance Solution-Processed, Non-doped Blue OLEDs. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709125] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xu-Lin Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
- Xiamen Institute of Rare Earth Materials; Haixi Institute; Chinese Academy of Science; Xiamen 361021 P. R. China
| | - Ji-Hui Jia
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
- Graduate University of Chinese Academy of Sciences; Beijing 100049 China
| | - Rongmin Yu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
| | - Jian-Zhen Liao
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
| | - Ming-Xue Yang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
- Graduate University of Chinese Academy of Sciences; Beijing 100049 China
| | - Can-Zhong Lu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
- Xiamen Institute of Rare Earth Materials; Haixi Institute; Chinese Academy of Science; Xiamen 361021 P. R. China
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45
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Chen XL, Jia JH, Yu R, Liao JZ, Yang MX, Lu CZ. Combining Charge-Transfer Pathways to Achieve Unique Thermally Activated Delayed Fluorescence Emitters for High-Performance Solution-Processed, Non-doped Blue OLEDs. Angew Chem Int Ed Engl 2017; 56:15006-15009. [DOI: 10.1002/anie.201709125] [Citation(s) in RCA: 178] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Xu-Lin Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
- Xiamen Institute of Rare Earth Materials; Haixi Institute; Chinese Academy of Science; Xiamen 361021 P. R. China
| | - Ji-Hui Jia
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
- Graduate University of Chinese Academy of Sciences; Beijing 100049 China
| | - Rongmin Yu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
| | - Jian-Zhen Liao
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
| | - Ming-Xue Yang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
- Graduate University of Chinese Academy of Sciences; Beijing 100049 China
| | - Can-Zhong Lu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures; Fujian Provincial Key Laboratory of Nanomaterials; Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; Fuzhou Fujian Province P. R. China
- Xiamen Institute of Rare Earth Materials; Haixi Institute; Chinese Academy of Science; Xiamen 361021 P. R. China
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46
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Huang J, Nie H, Zeng J, Zhuang Z, Gan S, Cai Y, Guo J, Su SJ, Zhao Z, Tang BZ. Highly Efficient Nondoped OLEDs with Negligible Efficiency Roll-Off Fabricated from Aggregation-Induced Delayed Fluorescence Luminogens. Angew Chem Int Ed Engl 2017; 56:12971-12976. [PMID: 28833917 DOI: 10.1002/anie.201706752] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/11/2017] [Indexed: 11/10/2022]
Abstract
Purely organic emitters that can efficiently utilize triplet excitons are highly desired to cut the cost of organic light-emitting diodes (OLEDs), but most of them require complicated doping techniques for their fabrication and suffer from severe efficiency roll-off. Herein, we developed novel luminogens with weak emission and negligible delayed fluorescence in solution but strong emission with prominent delayed components upon aggregate formation, giving rise to aggregation-induced delayed fluorescence (AIDF). The concentration-caused emission quenching and exciton annihilation are well-suppressed, which leads to high emission efficiencies and efficient exciton utilization in neat films. Their nondoped OLEDs provide excellent electroluminescence efficiencies of 59.1 cd A-1 , 65.7 lm W-1 , and 18.4 %, and a negligible current efficiency roll-off of 1.2 % at 1000 cd m-2 . Exploring AIDF luminogens for the construction of nondoped OLEDs could be a promising strategy to advance device efficiency and stability.
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Affiliation(s)
- Jian Huang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Han Nie
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Jiajie Zeng
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Zeyan Zhuang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Shifeng Gan
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Yuanjing Cai
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Jingjing Guo
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Shi-Jian Su
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China.,Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
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47
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Huang J, Nie H, Zeng J, Zhuang Z, Gan S, Cai Y, Guo J, Su SJ, Zhao Z, Tang BZ. Highly Efficient Nondoped OLEDs with Negligible Efficiency Roll-Off Fabricated from Aggregation-Induced Delayed Fluorescence Luminogens. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706752] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jian Huang
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Han Nie
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Jiajie Zeng
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Zeyan Zhuang
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Shifeng Gan
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Yuanjing Cai
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Jingjing Guo
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Shi-Jian Su
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China
- Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction; The Hong Kong University of Science & Technology; Clear Water Bay Kowloon, Hong Kong China
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48
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Hecht R, Kade J, Schmidt D, Nowak-Król A. n-Channel Organic Semiconductors Derived from Air-Stable Four-Coordinate Boron Complexes of Substituted Thienylthiazoles. Chemistry 2017; 23:11620-11628. [DOI: 10.1002/chem.201701922] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Indexed: 02/04/2023]
Affiliation(s)
- Reinhard Hecht
- Center for Nanosystems Chemistry (CNC) and Bavarian Polymer Institute (BPI); Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Juliane Kade
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - David Schmidt
- Center for Nanosystems Chemistry (CNC) and Bavarian Polymer Institute (BPI); Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Agnieszka Nowak-Król
- Center for Nanosystems Chemistry (CNC) and Bavarian Polymer Institute (BPI); Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
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49
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Li M, Liu Y, Duan R, Wei X, Yi Y, Wang Y, Chen CF. Aromatic-Imide-Based Thermally Activated Delayed Fluorescence Materials for Highly Efficient Organic Light-Emitting Diodes. Angew Chem Int Ed Engl 2017; 56:8818-8822. [PMID: 28557359 DOI: 10.1002/anie.201704435] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Indexed: 01/22/2023]
Abstract
Aromatic-imide-based thermally activated delayed fluorescence (TADF) materials with a twisted donor-acceptor-donor skeleton were efficiently synthesized and exhibited excellent thermal stability and high photoluminescence quantum yields. The small ΔEST value (<0.1 eV) along with the clear temperature-dependent delayed component of their transient photoluminescence (PL) spectra demonstrated their excellent TADF properties. Moreover, the performance of organic light-emitting diodes in which TADF materials AI-Cz and AI-TBCz were used as dopants were outstanding, with external quantum efficiencies up to 23.2 and 21.1 %, respectively.
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Affiliation(s)
- Meng Li
- CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanwei Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Ruihong Duan
- CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiaofang Wei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yuanping Yi
- CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Ying Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Chuan-Feng Chen
- CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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50
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Li M, Liu Y, Duan R, Wei X, Yi Y, Wang Y, Chen CF. Aromatic-Imide-Based Thermally Activated Delayed Fluorescence Materials for Highly Efficient Organic Light-Emitting Diodes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704435] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Meng Li
- CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Yanwei Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials; Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Ruihong Duan
- CAS Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Xiaofang Wei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials; Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Yuanping Yi
- CAS Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Ying Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials; Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Chuan-Feng Chen
- CAS Key Laboratory of Molecular Recognition and Function; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
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