The symmetric and quadrupolar donor-acceptor-donor (D-A-D) molecules usually exhibit excited-state charge redistribution process from delocalized intramolecular charge transfer (ICT) state to localized ICT state. Direct observation of such charge redistribution process in real-time has been intensively studied via various ultrafast time-resolved spectroscopies. Femtosecond stimulated Raman spectroscopy (FSRS) is one of the powerful methods which can be used to determine the excited state dynamics by tracking vibrational mode evolution of the specific chemical bonds within molecules. Herein, a molecule, 4,4′-(buta-1,3-diyne-1,4-diyl)bis(N,N-bis(4-methoxyphenyl)aniline), that consists of two central adjacent alkyne (-C≡C-) groups as electron-acceptors and two separated, symmetric N,N-bis(4-methoxyphenyl)aniline at both branches as electron-donors, is chosen to investigate the excited-state photophysical properties. It is shown that the solvation induced excited-state charge redistribution in polar solvents can be probed by using femtosecond stimulated Raman spectroscopy. The results provide a fundamental understanding of photoexcitation induced charge delocalization/localization properties of the symmetric quadrupolar molecules with adjacent vibrational markers located at central position.
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February 2022
Research Article|
February 01 2022
Probing effect of solvation on photoexcited quadrupolar donor-acceptor-donor molecule via ultrafast Raman spectroscopy†
Wei Zhang;
Wei Zhang
a
State Key Laboratory of Information Photonic and Optical Communications, School of Science, Beijing University of Posts and Telecommunications (BUPT)
, Beijing 100876, China
b
Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences
, Beijing 100190, China
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Jie Kong;
Jie Kong
c
Department of Chemical Physics, University of Science and Technology of China
, Hefei 230026, China
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Wenqi Xu;
Wenqi Xu
d
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, China
e
STU SIOM Joint Laboratory for Superintense Lasers and the Applications
, Shanghai 201210, China
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Xinmiao Niu;
Xinmiao Niu
b
Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences
, Beijing 100190, China
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Di Song;
Di Song
*
a
State Key Laboratory of Information Photonic and Optical Communications, School of Science, Beijing University of Posts and Telecommunications (BUPT)
, Beijing 100876, China
*Authors to whom correspondence should be addressed. E-mail: [email protected], [email protected], [email protected]
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Weimin Liu;
Weimin Liu
*
d
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, China
e
STU SIOM Joint Laboratory for Superintense Lasers and the Applications
, Shanghai 201210, China
*Authors to whom correspondence should be addressed. E-mail: [email protected], [email protected], [email protected]
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Andong Xia
Andong Xia
*
a
State Key Laboratory of Information Photonic and Optical Communications, School of Science, Beijing University of Posts and Telecommunications (BUPT)
, Beijing 100876, China
b
Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences
, Beijing 100190, China
*Authors to whom correspondence should be addressed. E-mail: [email protected], [email protected], [email protected]
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*Authors to whom correspondence should be addressed. E-mail: [email protected], [email protected], [email protected]
†
Part of Special Issue “In Memory of Prof. Nanquan Lou on the occasion of his 100th anniversary”.
Chin. J. Chem. Phys. 35, 69–76 (2022)
Article history
Received:
November 04 2021
Accepted:
December 08 2021
Citation
Wei Zhang, Jie Kong, Wenqi Xu, Xinmiao Niu, Di Song, Weimin Liu, Andong Xia; Probing effect of solvation on photoexcited quadrupolar donor-acceptor-donor molecule via ultrafast Raman spectroscopy. Chin. J. Chem. Phys. 1 February 2022; 35 (1): 69–76. https://doi.org/10.1063/1674-0068/cjcp2111223
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