A Study of Excitation Delocalization/Localization in Multibranched Chromophores by Using Fluorescence Excitation Anisotropy Spectroscopy

	A Study of Excitation Delocalization/Localization in Multibranched Chromophores by Using Fluorescence Excitation Anisotropy Spectroscopy
	Li, Yang; He, Guiying; Wang, Xian; Guo, Qianjin; Niu, Yingli; Xia, Andong
刊名	CHEMPHYSCHEM
	2016-02-03
卷号	17 期号:3 页码:406-411
关键词	ab initio calculations chromophores delocalization energy transfer fluorescence
英文摘要	We describe a simple approach to study the excitation localization/delocalization in multibranched chromophores by using fluorescence excitation anisotropy spectroscopy at room temperature. As examples, the electronic excitations in three different multibranched chromophores (dimers) are investigated. For a weakly coupled dimer, fluorescence anisotropy is independent of excitation wavelength, due to localized excitation as well as the degenerate electronic excited states. In contrast, in the case of a strongly coupled dimer, owing to excitonic splitting, a redistribution of the excitation energy is demonstrated by the dependence of anisotropy spectra on the excitation wavelength, which leads to significant deviation from the anisotropy signal of localized excitation. In particular, based on the law of additivity for anisotropy, the degree of delocalized excitation can be simply estimated for a given dimer.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/35813]
专题	化学研究所_光化学实验室
作者单位	Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Dept, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Yang,He, Guiying,Wang, Xian,et al. A Study of Excitation Delocalization/Localization in Multibranched Chromophores by Using Fluorescence Excitation Anisotropy Spectroscopy[J]. CHEMPHYSCHEM,2016,17(3):406-411.
APA	Li, Yang,He, Guiying,Wang, Xian,Guo, Qianjin,Niu, Yingli,&Xia, Andong.(2016).A Study of Excitation Delocalization/Localization in Multibranched Chromophores by Using Fluorescence Excitation Anisotropy Spectroscopy.CHEMPHYSCHEM,17(3),406-411.
MLA	Li, Yang,et al."A Study of Excitation Delocalization/Localization in Multibranched Chromophores by Using Fluorescence Excitation Anisotropy Spectroscopy".CHEMPHYSCHEM 17.3(2016):406-411.