The mechanism of different sensitivity of meso-substituted and unsubstituted cyanine dyes in rotation-restricted environments for biomedical imaging applications

	The mechanism of different sensitivity of meso-substituted and unsubstituted cyanine dyes in rotation-restricted environments for biomedical imaging applications
	Cao, Jianfang 1,2; Hu, Chong 1; Sun, Wen 1; Xu, Qunli 1; Fan, Jiangli 1; Song, Fengling 1; Sun, Shiguo 1; Peng, Xiaojun 1
刊名	rsc advances
	2014
卷号	4 期号:26 页码:13385-13394
英文摘要	a series of cyanine dyes have been excellent environment-sensitive fluorescent probes in live cells as well as in living tissue imaging due to their low quantum yields in solution but also their large fluorescence enhancements in microenvironments. in this paper, a new mechanism of different environmental sensitivity of meso-substituted and unsubstituted cyanine dyes in rotation-restricted environments (dna or viscosity) for biomedical imaging applications is proposed on the basis of experimental observations and quantum-chemically calculated potential energy curves for twisting around the various c-c bonds in the polymethine chain. computational studies on these dyes reveal substituents on the bridge decrease the energy barriers for rotations around different chemical bonds, which play a major role in reducing fluorescence quantum yield in a free state and providing a high environmental sensitivity for the meso-substituted cyanine dyes. the energy barriers and energy gaps to the rotations of c-c bonds strongly depend on the choice of substituents in the meso-position of the polymethine chain. the results might provide a foundation for the interpretation of the behavior of the dyes and are useful for the future design of new cyanine fluorophores.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, multidisciplinary
研究领域[WOS]	chemistry
关键词[WOS]	fluorescent-probes ; polymethine chain ; fluorogenic dyes ; living cells ; viscosity ; fluorophores ; sensor ; dna ; photoprocesses ; conformations
收录类别	SCI
语种	英语
WOS记录号	WOS:000333082700022
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/145749]
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.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Cao, Jianfang,Hu, Chong,Sun, Wen,et al. The mechanism of different sensitivity of meso-substituted and unsubstituted cyanine dyes in rotation-restricted environments for biomedical imaging applications[J]. rsc advances,2014,4(26):13385-13394.
APA	Cao, Jianfang.,Hu, Chong.,Sun, Wen.,Xu, Qunli.,Fan, Jiangli.,...&Peng, Xiaojun.(2014).The mechanism of different sensitivity of meso-substituted and unsubstituted cyanine dyes in rotation-restricted environments for biomedical imaging applications.rsc advances,4(26),13385-13394.
MLA	Cao, Jianfang,et al."The mechanism of different sensitivity of meso-substituted and unsubstituted cyanine dyes in rotation-restricted environments for biomedical imaging applications".rsc advances 4.26(2014):13385-13394.