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


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

JIANG Li-Lin   

  1. 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
  • 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).


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