Excited-state hydrogen bonding effect on dynamic fluorescence of coumarin 102 chromophore in solution: A time-resolved fluorescence and theoretical study

	Excited-state hydrogen bonding effect on dynamic fluorescence of coumarin 102 chromophore in solution: A time-resolved fluorescence and theoretical study
	Liu, Yu-Hui 1,2; Li, Peng 1
刊名	journal of luminescence
	2011-10-01
卷号	131 期号:10 页码:2116-2120
关键词	Hydrogen bond Excited state Time-resolved fluorescence Equilibrium constant
ISSN号	待补充
通讯作者	李鹏
产权排序	1,1
中文摘要	excited-state hydrogen bonding effect on dynamic fluorescence of coumarin 102 chromophore in solution: a time-resolved fluorescence and theoretical study
英文摘要	the steady-state absorption and emission as well as the time-resolved fluorescence spectra of coumarin 102 (c102) in both aprotic and alcoholic solvents have been used to study the effect of excited-state hydrogen bond on the dynamic fluorescence of c102 chromophore in various solutions. the dual fluorescence of c102 in alcohols, which is dependent on the hydrogen-bonded donation ability of the solvent, has been assigned to the distribution of free c102 and a hydrogen-bonded complex. furthermore, a shift of the fluorescence spectra induced by excited-state hydrogen bond has been demonstrated to take place within hundreds of picoseconds by the performance of the time-resolved fluorescence spectra with the time-correlated single-photon-counting (tcspc) technique. moreover, the time-dependent density functional theory (tddft) has been used to calculate the hydrogen-bonded equilibrium constant pk(hb) in different electronic states. it has been demonstrated for the first time that the hydrogen bond strengthening in electronic excited states could decrease the free energy of the hydrogen-bonded complex due to its stronger binding energy. therefore, the hydrogen-bonded equilibrium will become markedly in favor of the hydrogen-bonded forms in electronic excited states by comparison with the case in the ground state. (c) 2011 elsevier b.v. all rights reserved.
学科主题	物理化学
WOS标题词	science & technology ; physical sciences
类目[WOS]	optics
研究领域[WOS]	optics
关键词[WOS]	intramolecular charge-transfer ; heptamethine cyanine dye ; site-specific solvation ; electron-transfer ; aprotic-solvents ; proton-transfer ; cytochrome-c ; laser-dyes ; td-dft ; mechanism
收录类别	SCI
语种	英语
WOS记录号	WOS:000293118100016
公开日期	2012-07-09
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/115384]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yu-Hui,Li, Peng. Excited-state hydrogen bonding effect on dynamic fluorescence of coumarin 102 chromophore in solution: A time-resolved fluorescence and theoretical study[J]. journal of luminescence,2011,131(10):2116-2120.
APA	Liu, Yu-Hui,&Li, Peng.(2011).Excited-state hydrogen bonding effect on dynamic fluorescence of coumarin 102 chromophore in solution: A time-resolved fluorescence and theoretical study.journal of luminescence,131(10),2116-2120.
MLA	Liu, Yu-Hui,et al."Excited-state hydrogen bonding effect on dynamic fluorescence of coumarin 102 chromophore in solution: A time-resolved fluorescence and theoretical study".journal of luminescence 131.10(2011):2116-2120.