广西科学2016，Vol.23Issue(3)：266-271,6.DOI:10.13656/j.cnki.gxkx.20160713.009
温度对β-胡萝卜素二维相关红外光谱的影响
Study onβ-carotene under Thermal Treatment by Two-Dimensional Correlation Fourier Transform Infrared Spectroscopy
摘要
Abstract
Abtract:[Objective]The aim of this study is to analyze the interaction between the different groups ofβ-carotene in the heating process.[Methods]Two-dimensional correlation spectrosco-py was applied to study the dynamic spectral changes ofβ-carotene from 30℃ to 100℃.[Re-sults]The changes of absorption characteristic peaks ofβ-carotene were inconspicuous in the conventional FTIR spectra and second derivative FTIR spectra during 30℃ to 100℃,which in-dicated that they had no oxidation reation.Two-dimensional correlation analysis showed that the changes of absorption peaks at 968 cm-1 ,1 442 cm-1 ,2 9 6 6 cm-1 and 3 0 1 2 cm-1 were more sen-sitive to temperature.Meanwhile,the order of different groups changes induced by temperature were as follows:the spectral changes of methyl-ene were faster than methyl,the spectral changes of methyl C-H symmetric stretching vibration in low wavenumber were faster than methyl anti-symmetric stretching vibration in high wavenumber,and olefin hydrocarbon symmetric stretching vibration were prior to olefin hydrocarbon anti-symmetric stretching vibration.[Con-clusion]This provides experimental basis for the mechanism of the conformational change ofβ-carotene in heating process.关键词
β-胡萝卜素/温度/傅里叶变换红外光谱/二维相关分析Key words
β-carotene/temperature/Fourier transform infrared spectroscopy/two-dimensional correlation analysis分类
化学化工引用本文复制引用
卢明倩,黄桂媛,王巧贞,许超,黄庶识..温度对β-胡萝卜素二维相关红外光谱的影响[J].广西科学,2016,23(3):266-271,6.基金项目
国家自然科学基金项目(31160018),广西科学研究与技术开发计划项目(0992003A-20)和广西科学院基本科研业务费项目(13YT22WL08)资助。 （31160018）
