Premium
Effect of the structural order of all‐trans‐β‐carotene on the Raman scattering cross section at low concentrations
Author(s) -
OuYang ShunLi,
Sun ChengLin,
Zhou Mi,
Li ZhanLong,
Men ZhiWei,
Li DongFei,
Li ZuoWei,
Gao ShuQin,
Lu GuoHui
Publication year - 2010
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2602
Subject(s) - raman spectroscopy , raman scattering , chemistry , carotene , carbon disulfide , molecule , molecular physics , analytical chemistry (journal) , cross section (physics) , lattice (music) , crystallography , optics , physics , organic chemistry , quantum mechanics , acoustics
Using the technique of liquid‐core optical fiber (LCOF), we measured the Raman scattering cross sections (RSCSs) of the carbon–carbon (CC) stretching vibrational modes of all‐trans‐β‐carotene in carbon disulfide (CS 2 ) at concentrations ranging from 10 −6 to 10 −11 M . It was found that the RSCSs of all‐trans‐β‐carotene were extremely high with decreasing concentration, and the absolute RSCS of C stretching modes of all‐trans‐β‐carotene reached the value of 2.6 × 10 −20 cm 2 molecule −1 Sr −1 at 8 × 10 −11 M , which is larger than at 8 × 10 −6 Mby 4 orders of magnitude. A theoretical interpretation of the anomalous experimental results is given, which introduces a qualitative nonlinear model of coherent weakly damped electron‐lattice vibrations in structural order of all‐trans‐β‐carotene. Copyright © 2010 John Wiley & Sons, Ltd.