Temperature dependence of resonance Raman spectra of carotenoids
作者： A. Andreeva , I. Apostolova , M. Velitchkova
DOI: 10.1016/J.SAA.2010.12.071
关键词:
摘要: To understand the mechanism of photoprotective and antioxidative functions carotenoids, it is essential to have a profound knowledge their excited electronic vibronic states. In present study we investigate most powerful antioxidants: β-carotene lutein by means resonance Raman spectroscopy. The aim was in detail spectra solution at room temperature changes as function temperature. measure natural environment pyridine has been used solvent. It chosen because its polarizability (n=1.5092) which close that membrane lipids proteins. dependence intensive ν(1) band range from 77 K 295 514.5 nm excitation obtained. found CC stretching frequency, intensity, line shape, width are very sensitive (the sensitivity being different for two studied carotenoids). observed linear frequency explained involving coupling extent π-electron delocalization. behavior temperature-induced broadening intensity carotenoids can be associated with nature solid matrices: glassy crystalline-like lutein, owing chemical structures.
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