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Gao X, Sui N, Wang Q, Pan L, Ni M, Lu R, Zhang H, Kang Z, Li L, Wang Y. Scanning Ultrafast Spectral Dynamics of Triphenylamine-Modified Vinylbenzothiazole Derivative: Role of Solvent Polarity and Temperature. J Phys Chem Lett 2020; 11:7603-7609. [PMID: 32814431 DOI: 10.1021/acs.jpclett.0c02254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The photophysical properties of a donor-acceptor compound based on triphenylamine-modified vinylbenzothiazole derivative (BTTM) are investigated by multispectral techniques. Based on the pump-probe and pump-dump/push-probe technique, it is found that the hybridized localized excited (LE) and charge transfer (CT) state (HLCT) participates in the relaxation process of excited BTTM. The excited state is the LE-dominated HLCT state in cyclohexane; then it evolves to the CT-dominated HLCT state in a high polarity solvent. Meanwhile, a new intermediate state named the HLCT' state also exists in a high polar solvent. When the temperature of BTTM film drops, the increasing photoluminescence (PL) lifetime and PL quantum yield are assigned to the nonradiative recombination inactivation. The pump-probe data show that exciton-exciton annihilation originating from exciton collision gradually increases owing to the weakening of phonon-exciton scattering at low temperature. Our results provide comprehensive insight into the optoelectronic properties of organic molecules.
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Affiliation(s)
- Xiujun Gao
- Femtosecond Laser Laboratory, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Ning Sui
- Femtosecond Laser Laboratory, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Quan Wang
- Femtosecond Laser Laboratory, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Lingyun Pan
- Femtosecond Laser Laboratory, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Moucui Ni
- Femtosecond Laser Laboratory, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Ran Lu
- College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Hanzhuang Zhang
- Femtosecond Laser Laboratory, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Zhihui Kang
- Femtosecond Laser Laboratory, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Li Li
- College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
| | - Yinghui Wang
- Femtosecond Laser Laboratory, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
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Chen Y, Lu R, Wang Y, Gao Y, Sui N, Ni M, Kang Z, Zhou Q, Zhang H. The nonlinear and linear photo-physical properties of π-conjugated extensions based on difluoroboron β-diketonate complexes with terminal triphenylamines: The role of vinyl unit. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.06.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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