摘要
The concentration dependence of the fluorescence spectra and lifetimes of chlorophyll𝑏and sodium magnesium chlorophyllin are compared to explore the influences of intramolecular relaxation and intermolecular interaction of chlorophylls on the fluorescence dynamics.With different concentrations of chlorophyll𝑏and sodium magnesium chlorophyllin in the suspensions,three different fluorescence emission bands are observed.Intermolecular inter-actions increase as the concentrations increase,which lead to redshifts in both fluorescence and lifetime spectra.Additionally,the lifetime is increased by re-absorption in the sodium magnesium chlorophyllin suspensions.These observations increase the understanding of the light harvesting and energy relaxation mechanisms of chlorophyll molecules.
作者
王亚兰
周张凯
彭小牛
周利
郝中华
王取泉
WANG Ya-Lan;ZHOU Zhang-Kai;PENG Xiao-Niu;ZHOU Li;HAO Zhong-Hua;WANG Qu-Quan(Department of Physics,Wuhan University,Wuhan 430072;School of Physics and Engineering,SunYat-Sen University,Guangzhou 510275)
基金
Supported by the National Natural Science Foundation of China(11174229,61008043 and 11204221)
Specialized Research Fund for the Doctoral Program of Higher Education of China(20100141120041).
