Open AccessSolvent effects on the electron-vibration coupling constant of β-carotene
Author(s) -
Shengnan Xu,
Tianyuan Liu,
Meijiao Sun,
Shuo Li,
WenHui Fang,
Chenglin Sun,
Zuowei Li
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.167801
Subject(s) - polarizability , solvent , dielectric , raman spectroscopy , solvent effects , electron , materials science , coupling constant , carotene , molecular vibration , molecular physics , analytical chemistry (journal) , chemistry , physics , molecule , optics , organic chemistry , optoelectronics , particle physics , quantum mechanics
Solvent effect plays an important role in determining electron-vibration coupling constant, however, the physical properties of solvent effects and the relationship between them still need to be investigated. We measure the UV-visible absorption and Raman spectra of β-carotene in 10 typical solvents. The results show that polarizability and dielectric constant of solvent have a significant effect on the electron-vibration coupling constant of β-carotene. With the increase of polarizability, no matter whether the solvent is of polarity, Huang-Ryes factor and the electron-vibration coupling constant of β-carotene decrease and the Raman scattering cross section of β-carotene increases. As to nonpolar solvent, Huang-Ryes factor and the electron-vibration coupling constant of β-carotene decrease with increasing the dielectric constant of the solvent. For polar solvent, no good regularity is obtained. In this paper, the regularity of solvent effect on the electron-vibration coupling constant is presented, which can provide a reference for how to choose the solvent in studying the electron-vibration coupling constant.