摘要:
类胡萝卜素是含有9个CC共轭双键的短链多烯类生物分子.特殊的分子结构,使其不仅在光采集,光防护,防癌,抗癌等生物学领域有重要应用,而且在分子导线,光开关,滤光器等光电器件研制中也有重要的非生物学应用.本文对它的分子光谱进行研究和总结,结果表明,类胡萝卜素具有宽带荧光,将其用于荧光增强受激拉曼散射可以获得宽带受激拉曼散射;电子能隙随温度降低而收缩,电子吸收光谱红移,这特性使它能研制优质半导体元件;极大的拉曼活性和三阶非线性系数,CC键基频拉曼散射截面可以比普通分子大10个数量级,和频、倍频拉曼散射强度也很高,低温下与基频强度比可达0.5.类胡萝卜素分子的这些光谱特性对多烯类分子结构、性能研究及其在非生物学中的应用有重要参数价值.
Abstract:
Carotenoid is a short-chain polyene biomolecule of 9 CC conjugate double-bonds.Due to its special structure carotenoid is used not only in photoprotection and anti-cancer,but also in molecule wires,light switch,and light filter.In this paper molecule spectra of carotenoid are studied.The carotenoid has the broadband fluorescence,the broadband stimulated Raman scattering is obtained when the fluorescence of carotenoid is used to enhance stimulated Raman scattering.Electron energy gap of carotenoid becomes narrow with temperature decreasing,and absorption spectra are red-shifted.These characteristics can make the carotenoid a high-quality semiconductor component.Raman active is intensive and the 3rd order optical nonlinear coefficient is large.The Raman scattering cross section of CC bond is about 10 orders of magnitude larger than that of common molecule.The Raman scattering intensity of overtone is intensive：the ratio of overtone to basic frequency is around 0.5 at low temperature.These spectrum characteristics of carotenoid are significant for studying polyene molecule structure,property and non-biology domain.
首页
登录
注册
下载: