光致电子转移对Rhodamine 6G基态分子结构影响的非共振Raman光谱研究

doi:10.3866/PKU.WHXB201409252

Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (11): 1987-1992.doi: 10.3866/PKU.WHXB201409252

• THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY • Previous Articles Next Articles

Influence of Photoinduced Electron Transfer on the Ground-State Molecular Structure of Rhodamine 6G Determined by Nonresonance Raman Spectroscopy

JIANG Li-Lin

Department of Mechanics and Electronics Engineering, Hezhou University, Hezhou 542899, Guangxi Zhuang Autonomous Region, P. R. China

Received:2014-08-16 Revised:2014-09-25 Published:2014-10-30
Contact: JIANG Li-Lin E-mail:jianglilin2009@gmail.com
Supported by:
The project was supported by the National Natural Science Foundation of China (21003033, 21203047), Guangxi Natural Science Foundation, China (2014GXNSFAA118019), Research Foundation of Education Bureau of Guangxi, China (ZD2014127), and Doctor's Scientific Research Foundation of Hezhou University, China (HZUBS201401).

Abstract

Abstract:

Changes of the ground-state molecular structure of rhodamine 6G (Rh6G⁺) in pure electron donor solvent N,N-diethylaniline (DEA) were investigated by nonresonance Raman spectroscopy and quantum chemical calculations to help understand photoinduced intermolecular electron transfer (PIET) in this system. All of the vibrational modes coupled to PIET were determined and assigned. The results indicate that the most prominent vibrational mode at 675 cm^-1, corresponding to the in-plane bending of the xanthene ring, strongly contributes to PIET. Compared with the C―C stretching mode, the C=C stretching vibration of the chromophore aromatic ring of the Rh6G/DEA⁺ charge-transfer complex is more sensitive to PIET. This work provides new insight for designing molecular structures or solvent environments with desirable electron transfer properties for use in photovoltaic devices.

Key words: Ground-state molecular structure, Rhodamine 6G, Nonresonance Raman spectroscopy, Quantum chemical calculation, Photoinduced intermolecular electron transfer

JIANG Li-Lin. Influence of Photoinduced Electron Transfer on the Ground-State Molecular Structure of Rhodamine 6G Determined by Nonresonance Raman Spectroscopy[J].Acta Phys. -Chim. Sin., 2014, 30(11): 1987-1992.

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Influence of Photoinduced Electron Transfer on the Ground-State Molecular Structure of Rhodamine 6G Determined by Nonresonance Raman Spectroscopy

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