1
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Bae J, Sakai M, Tsuchiya Y, Ando N, Chen XK, Nguyen TB, Chan CY, Lee YT, Auffray M, Nakanotani H, Yamaguchi S, Adachi C. Multiple resonance type thermally activated delayed fluorescence by dibenzo [1,4] azaborine derivatives. Front Chem 2022; 10:990918. [PMID: 36199661 PMCID: PMC9527295 DOI: 10.3389/fchem.2022.990918] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 08/17/2022] [Indexed: 11/30/2022] Open
Abstract
We studied the photophysical and electroluminescent (EL) characteristics of a series of azaborine derivatives having a pair of boron and nitrogen aimed at the multi-resonance (MR) effect. The computational study with the STEOM-DLPNO-CCSD method clarified that the combination of a BN ring-fusion and a terminal carbazole enhanced the MR effect and spin-orbit coupling matrix element (SOCME), simultaneously. Also, we clarified that the second triplet excited state (T2) plays an important role in efficient MR-based thermally activated delayed fluorescence (TADF). Furthermore, we obtained a blue–violet OLED with an external EL quantum efficiency (EQE) of 9.1%, implying the presence of a pronounced nonradiative decay path from the lowest triplet excited state (T1).
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Affiliation(s)
- Jaehyun Bae
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
- Department of Chemistry and Biochemistry, Kyushu University, Fukuoka, Japan
| | - Mika Sakai
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
- *Correspondence: Youichi Tsuchiya, ; Shigehiro Yamaguchi, ; Chihaya Adachi,
| | - Naoki Ando
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Japan
| | - Xian-Kai Chen
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
| | - Thanh Ba Nguyen
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
- Department of Chemistry and Biochemistry, Kyushu University, Fukuoka, Japan
| | - Chin-Yiu Chan
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
| | - Yi-Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
| | - Morgan Auffray
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
- Department of Chemistry and Biochemistry, Kyushu University, Fukuoka, Japan
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Japan
- Research Center for Materials Science (RCMS) and Integrated Research Consortium on Chemical Sciences (IRCCS), Nagoya University, Nagoya, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan
- *Correspondence: Youichi Tsuchiya, ; Shigehiro Yamaguchi, ; Chihaya Adachi,
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan
- Department of Chemistry and Biochemistry, Kyushu University, Fukuoka, Japan
- International Institute for Carbon Neutral Energy Research (WPI-ICNER), Kyushu University, Fukuoka, Japan
- *Correspondence: Youichi Tsuchiya, ; Shigehiro Yamaguchi, ; Chihaya Adachi,
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Tanaka M, Auffray M, Nakanotani H, Adachi C. Spontaneous formation of metastable orientation with well-organized permanent dipole moment in organic glassy films. Nat Mater 2022; 21:819-825. [PMID: 35637340 DOI: 10.1038/s41563-022-01265-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 04/20/2022] [Indexed: 06/15/2023]
Abstract
The performance of organic optoelectronic and energy-harvesting devices is largely determined by the molecular orientation and resultant permanent dipole moment, yet this property is difficult to control during film preparation. Here, we demonstrate the active control of dipole direction-that is, vector direction and magnitude-in organic glassy films by physical vapour deposition. An organic glassy film with metastable permanent dipole moment orientation can be obtained by utilizing the small surface free energy of a trifluoromethyl unit and intramolecular permanent dipole moment induced by functional groups. The proposed molecular design rule could pave a way toward the formation of spontaneously polarized organic glassy films, leading to improvement in the performance of organic molecular devices.
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Affiliation(s)
- Masaki Tanaka
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Nishi-ku, Fukuoka, Japan.
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.
| | - Morgan Auffray
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Nishi-ku, Fukuoka, Japan
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Nishi-ku, Fukuoka, Japan.
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Nishi-ku, Fukuoka, Japan.
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Nishi-ku, Fukuoka, Japan.
- International Institute for Carbon Neutral Energy Research (I2CNER), Kyushu University, Nishi-ku, Fukuoka, Japan.
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3
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Balijapalli U, Lee Y, Karunathilaka BSB, Tumen‐Ulzii G, Auffray M, Tsuchiya Y, Nakanotani H, Adachi C. Tetrabenzo[
a
,
c
]phenazine Backbone for Highly Efficient Orange–Red Thermally Activated Delayed Fluorescence with Completely Horizontal Molecular Orientation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106570] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Umamahesh Balijapalli
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Yi‐Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Buddhika S. B. Karunathilaka
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Ganbaatar Tumen‐Ulzii
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Morgan Auffray
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
- International Institute for Carbon Neutral Energy Research, (WPI-I2CNER) Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
- International Institute for Carbon Neutral Energy Research, (WPI-I2CNER) Kyushu University 744 Motooka, Nishi Fukuoka 819-0395 Japan
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Balijapalli U, Lee YT, Karunathilaka BSB, Tumen-Ulzii G, Auffray M, Tsuchiya Y, Nakanotani H, Adachi C. Tetrabenzo[a,c]phenazine Backbone for Highly Efficient Orange-Red Thermally Activated Delayed Fluorescence with Completely Horizontal Molecular Orientation. Angew Chem Int Ed Engl 2021; 60:19364-19373. [PMID: 34155775 DOI: 10.1002/anie.202106570] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Indexed: 11/09/2022]
Abstract
Three thermally activated delayed fluorescence (TADF) molecules, namely PQ1, PQ2, and PQ3, are composed of electron-accepting (A) tetrabenzo[a,c]phenazine (TBPZ) and electron-donating (D) phenoxazine (PXZ) units are designed and characterized. The combined effects of planar acceptor manipulation and high steric hindrance between D and A units endow high molecular rigidity that suppresses nonradiative decay of the excitons with improved photoluminescence quantum yields (PLQYs). Particularly, the well-aligned excited states involving a singlet and a triplet charge-transfer excited states and a localized excited triplet state in PQ3 enhances the reverse intersystem crossing rate constant (kRISC ) with a short delay lifetime (τd ). The orange-red OLED based on PQ3 displays a maximum external EL quantum efficiency (EQE) of 27.4 % with a well-suppressed EL efficiency roll-off owing to a completely horizontal orientation of the transition dipole moment in the film state.
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Affiliation(s)
- Umamahesh Balijapalli
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Yi-Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Buddhika S B Karunathilaka
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Ganbaatar Tumen-Ulzii
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Morgan Auffray
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.,International Institute for Carbon Neutral Energy Research, (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.,International Institute for Carbon Neutral Energy Research, (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
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Affiliation(s)
- Morgan Auffray
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
| | - Umamahesh Balijapalli
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
| | - Jean-Charles Ribierre
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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6
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Tumen-Ulzii G, Qin C, Klotz D, Leyden MR, Wang P, Auffray M, Fujihara T, Matsushima T, Lee JW, Lee SJ, Yang Y, Adachi C. Detrimental Effect of Unreacted PbI 2 on the Long-Term Stability of Perovskite Solar Cells. Adv Mater 2020; 32:e1905035. [PMID: 32104961 DOI: 10.1002/adma.201905035] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 01/05/2020] [Indexed: 06/10/2023]
Abstract
Excess/unreacted lead iodide (PbI2 ) has been commonly used in perovskite films for the state-of-the-art solar cell applications. However, an understanding of intrinsic degradation mechanisms of perovskite solar cells (PSCs) containing unreacted PbI2 has been still insufficient and, therefore, needs to be clarified for better operational durability. Here, it is shown that degradation of PSCs is hastened by unreacted PbI2 crystals under continuous light illumination. Unreacted PbI2 undergoes photodecomposition under illumination, resulting in the formation of lead and iodine in films. Thus, this photodecomposition of PbI2 is one of the main reasons for accelerated device degradation. Therefore, this work reveals that carefully controlling the formation of unreacted PbI2 crystals in perovskite films is very important to improve device operational stability for diverse opto-electronic applications in the future.
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Affiliation(s)
- Ganbaatar Tumen-Ulzii
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Chuanjiang Qin
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Dino Klotz
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Matthew R Leyden
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Pangpang Wang
- Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), 4-1 Kyudaishinmachi, Nishi, Fukuoka, 819-0388, Japan
| | - Morgan Auffray
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Takashi Fujihara
- Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), 4-1 Kyudaishinmachi, Nishi, Fukuoka, 819-0388, Japan
| | - Toshinori Matsushima
- Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
| | - Jin-Wook Lee
- Department of Materials Science and Engineering and California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
| | - Sung-Joon Lee
- Department of Materials Science and Engineering and California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
| | - Yang Yang
- Department of Materials Science and Engineering and California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Japan Science and Technology Agency (JST), ERATO, Adachi Molecular Exciton Engineering Project, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan
- Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS), 4-1 Kyudaishinmachi, Nishi, Fukuoka, 819-0388, Japan
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7
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Balijapalli U, Tanaka M, Auffray M, Chan CY, Lee YT, Tsuchiya Y, Nakanotani H, Adachi C. Utilization of Multi-Heterodonors in Thermally Activated Delayed Fluorescence Molecules and Their High Performance Bluish-Green Organic Light-Emitting Diodes. ACS Appl Mater Interfaces 2020; 12:9498-9506. [PMID: 32020791 DOI: 10.1021/acsami.9b20020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report a series of pentacarbazolyl-benzonitrile derivatives such as 2,4,6-tri(9H-carbazol-9-yl)-3,5-bis(3,6-di(pyridin-3-yl)-9H-carbazol-9-yl)benzonitrile (mPyBN), 3,5-bis(3,6-bis(4-(trifluoromethyl)phenyl)-9H-carbazol-9-yl)-2,4,6-tri(9H-carbazol-9-yl)benzonitrile (pCF3BN), 2,4,6-tri(9H-carbazol-9-yl)-3-(3,6-di(pyridin-3-yl)-9H-carbazol-9-yl)-5-(3,6-diphenyl-9H-carbazol-9-yl)benzonitrile (PyPhBN), 3-(3,6-bis(4-(trifluoromethyl)phenyl)-9H-carbazol-9-yl)-2,4,6-tri(9H-carbazol-9-yl)-5-(3,6-di(pyridin-3-yl)-9H-carbazol-9-yl)benzonitrile (PyCF3BN), and 3-(3,6-bis(4-(trifluoromethyl)phenyl)-9H-carbazol-9-yl)-2,6-di(9H-carbazol-9-yl)-5-(3,6-di(pyridin-3-yl)-9H-carbazol-9-yl)-4-(9H-pyrido[3,4-b]indol-9-yl)benzonitrile (CbPyCF3BN) in which some of the carbazoles are substituted with modified 3,5-diphenyl carbazoles, exhibiting thermally activated delayed fluorescence (TADF) properties. These emitters comprised two, three, and four different types of donors, capable of bluish-green emission of around 480 nm with relatively high photoluminescence quantum yields over 90% in solution. Emitters, namely, PyPhBN, PyCF3BN, and CbPyCF3BN, composed of three and four different types of donors endowed a rather short delayed lifetime (τd) of 4.25, 5.01, and 3.65 μs in their film state, respectively. Bluish-green organic light-emitting diodes based on PyPhBN, PyCF3BN, and CbPyCF3BN exhibit a high external quantum efficiency of 20.6, 19.5, and 19.6%, respectively, with unsurpassed efficiency roll-off behavior. These results indicate that the TADF properties of multidonor type molecules can be manipulated by controlling the types and number of electron donor units.
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Affiliation(s)
- Umamahesh Balijapalli
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
| | - Masaki Tanaka
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
| | - Morgan Auffray
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
| | - Chin-Yiu Chan
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
| | - Yi-Ting Lee
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) , Kyushu University , 744 Motooka , Nishi, Fukuoka 819-0395 , Japan
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Auffray M, Charra F, Sosa Vargas L, Mathevet F, Attias AJ, Kreher D. Synthesis and photophysics of new pyridyl end-capped 3D-dithia[3.3]paracyclophane-based Janus tectons: surface-confined self-assembly of their model pedestal on HOPG. NEW J CHEM 2020. [DOI: 10.1039/d0nj00110d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Once synthesized, these new tectons demonstrated both ionic and coordination bonding. Surprisingly, P forms a quasi-square self-assembly independently of the underlying HOPG lattice.
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Affiliation(s)
- M. Auffray
- Sorbonne Université
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- 75252 Paris Cedex 05
| | - F. Charra
- Service de Physique de l’Etat Condensé
- CEA CNRS Université Paris-Saclay
- CEA Saclay
- F-91191 Gif-sur-Yvette Cedex
- France
| | - L. Sosa Vargas
- Sorbonne Université
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- 75252 Paris Cedex 05
| | - F. Mathevet
- Sorbonne Université
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- 75252 Paris Cedex 05
| | - A.-J. Attias
- Sorbonne Université
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- 75252 Paris Cedex 05
| | - D. Kreher
- Sorbonne Université
- UPMC Univ Paris 06
- Institut Parisien de Chimie Moléculaire
- UMR CNRS 8232
- 75252 Paris Cedex 05
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9
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Chen XK, Bakr BW, Auffray M, Tsuchiya Y, Sherrill CD, Adachi C, Bredas JL. Intramolecular Noncovalent Interactions Facilitate Thermally Activated Delayed Fluorescence (TADF). J Phys Chem Lett 2019; 10:3260-3268. [PMID: 31141375 DOI: 10.1021/acs.jpclett.9b01220] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
In the conventional molecular design of thermally activated delayed fluorescence (TADF) organic emitters, simultaneously achieving a fast rate of reverse intersystem crossing (RISC) from the triplet to the singlet manifold and a fast rate of radiative decay is a challenging task. A number of recent experimental data, however, point to TADF emitters with intramolecular π-π interactions as a potential pathway to overcome the issue. Here, we report a comprehensive investigation of TADF emitters with intramolecular π···π or lone-pair···π noncovalent interactions. We uncover the impact of those intramolecular noncovalent interactions on the TADF properties. In particular, we find that folded geometries in TADF molecules can trigger lone-pair···π interactions, introduce a n → π* character of the relevant transitions, enhance the singlet-triplet spin-orbit coupling, and ultimately greatly facilitate the RISC process. This work provides a robust foundation for the molecular design of a novel class of highly efficient TADF emitters in which intramolecular noncovalent interactions play a critical function.
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Affiliation(s)
- Xian-Kai Chen
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics , Georgia Institute of Technology , Atlanta , Georgia 30332-0400 , United States
| | - Brandon W Bakr
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics , Georgia Institute of Technology , Atlanta , Georgia 30332-0400 , United States
| | - Morgan Auffray
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka, Nishi , Fukuoka 819-0395 , Japan
| | - Youichi Tsuchiya
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka, Nishi , Fukuoka 819-0395 , Japan
| | - C David Sherrill
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics , Georgia Institute of Technology , Atlanta , Georgia 30332-0400 , United States
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA) , Kyushu University , 744 Motooka, Nishi , Fukuoka 819-0395 , Japan
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER) , Kyushu University , 744 Motooka, Nishi-ku , Fukuoka 819-0395 , Japan
| | - Jean-Luc Bredas
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics , Georgia Institute of Technology , Atlanta , Georgia 30332-0400 , United States
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10
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Auffray M, Kim DH, Kim JU, Bencheikh F, Kreher D, Zhang Q, D'Aléo A, Ribierre J, Mathevet F, Adachi C. Dithia[3.3]paracyclophane Core: A Versatile Platform for Triplet State Fine‐Tuning and Through‐Space TADF Emission. Chem Asian J 2019; 14:1921-1925. [DOI: 10.1002/asia.201900401] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Morgan Auffray
- Sorbonne Université Institut Parisien de Chimie Moléculaire (IPCM) UMR 8232, Chimie des Polymères 4 place Jussieu 75005 Paris France
| | - Dae Hyeon Kim
- Department of Applied Chemistry Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi Fukuoka 819-0395 Japan
| | - Jong Uk Kim
- Department of Applied Chemistry Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi Fukuoka 819-0395 Japan
| | - Fatima Bencheikh
- Department of Applied Chemistry Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi Fukuoka 819-0395 Japan
- ERATO Adachi Molecular Exciton Engeneering Project 744 Motooka Nishi Fukuoka 819-0395 Japan
| | - David Kreher
- Sorbonne Université Institut Parisien de Chimie Moléculaire (IPCM) UMR 8232, Chimie des Polymères 4 place Jussieu 75005 Paris France
| | - Qisheng Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 P. R. China
| | - Anthony D'Aléo
- Aix Marseille Univ. 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
| | - Jean‐Charles Ribierre
- Department of Applied Chemistry Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi Fukuoka 819-0395 Japan
- ERATO Adachi Molecular Exciton Engeneering Project 744 Motooka Nishi Fukuoka 819-0395 Japan
| | - Fabrice Mathevet
- Sorbonne Université Institut Parisien de Chimie Moléculaire (IPCM) UMR 8232, Chimie des Polymères 4 place Jussieu 75005 Paris France
| | - Chihaya Adachi
- Department of Applied Chemistry Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka Nishi Fukuoka 819-0395 Japan
- ERATO Adachi Molecular Exciton Engeneering Project 744 Motooka Nishi Fukuoka 819-0395 Japan
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11
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Vacher A, Auffray M, Barrière F, Roisnel T, Lorcy D. Electronic Interplay between TTF and Extended-TCNQ Electrophores along a Ruthenium Bis(acetylide) Linker. Org Lett 2017; 19:6060-6063. [DOI: 10.1021/acs.orglett.7b02818] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Antoine Vacher
- Institut des Sciences Chimiques de
Rennes, UMR 6226 CNRS-Université de Rennes 1, Matière Condensée et Systèmes Electroactifs (MaCSE), Campus de Beaulieu,
Bât 10A, Rennes 35042 Cedex, France
| | - Morgan Auffray
- Institut des Sciences Chimiques de
Rennes, UMR 6226 CNRS-Université de Rennes 1, Matière Condensée et Systèmes Electroactifs (MaCSE), Campus de Beaulieu,
Bât 10A, Rennes 35042 Cedex, France
| | - Frédéric Barrière
- Institut des Sciences Chimiques de
Rennes, UMR 6226 CNRS-Université de Rennes 1, Matière Condensée et Systèmes Electroactifs (MaCSE), Campus de Beaulieu,
Bât 10A, Rennes 35042 Cedex, France
| | - Thierry Roisnel
- Institut des Sciences Chimiques de
Rennes, UMR 6226 CNRS-Université de Rennes 1, Matière Condensée et Systèmes Electroactifs (MaCSE), Campus de Beaulieu,
Bât 10A, Rennes 35042 Cedex, France
| | - Dominique Lorcy
- Institut des Sciences Chimiques de
Rennes, UMR 6226 CNRS-Université de Rennes 1, Matière Condensée et Systèmes Electroactifs (MaCSE), Campus de Beaulieu,
Bât 10A, Rennes 35042 Cedex, France
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