Effect of the structural order of all-trans-β-carotene on the Raman scattering cross section at low concentrations
Article first published online: 19 FEB 2010
Copyright © 2010 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 41, Issue 12, pages 1650–1654, December 2010
How to Cite
OuYang, S.-L., Sun, C.-L., Zhou, M., Li, Z.-L., Men, Z.-W., Li, D.-F., Li, Z.-W., Gao, S.-Q. and Lu, G.-H. (2010), Effect of the structural order of all-trans-β-carotene on the Raman scattering cross section at low concentrations. J. Raman Spectrosc., 41: 1650–1654. doi: 10.1002/jrs.2602
- Issue published online: 16 DEC 2010
- Article first published online: 19 FEB 2010
- Manuscript Accepted: 3 DEC 2009
- Manuscript Received: 29 JUN 2009
- National Science Foundation of China. Grant Numbers: 10774057, 10974067
- structural order;
- Raman scattering cross section;
- liquid-core optical fiber
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 (CS2) at concentrations ranging from 10−6 to 10−11M. 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 cm2 molecule−1 Sr−1 at 8 × 10−11M, 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.