QQ客服 官方微博 反馈留言

	Excited-state deactivation of 5-vinyluracil: effects of pi-pi conjugation and intramolecular hydrogen bond c-h center dot center dot center dot o=c
	Liu, Yan1,2; Yang, Songqiu1
刊名	Journal of photochemistry and photobiology a-chemistry
	2016-11-01
卷号	330页码:1-7
关键词	Uracil Derivatives Conjugation effect Intramolecular hydrogen bond Excited-state lifetimes Conical intersections
ISSN号	1010-6030
DOI	10.1016/j.jphotochem.2016.07.012
通讯作者	Yang, songqiu(sqyang@dicp.ac.cn)
英文摘要	The excited-state decay mechanisms of 5-vinyluracil (5vu) are explored by using a combination of experimental and theoretical methods. the effects of vinyl substitutent, including the pi-pi conjugation effect and intramolecular hydrogen bond, are discussed. 5vu comprises the conformers 5vua and 5vub at ground state, with and without an intramolecular hydrogen bond c-h center dot center dot center dot o=c, respectively. the steady-state absorption and fluorescence spectra of 5vu are significantly red-shifted with respect to that of uracil. the time-resolved experimental results show that the excited-state decays of 5vu can be described by using three time constants: 2.26 ps, 13.45 ps and 4.66 ns. the decay pathways of 5vu obtained with the linearly interpolated internal coordinate method, predict that the two shorter lifetimes of 2.26 ps and 13.45 ps are attributed to 5vub, and that the longest lifetime of 4.66 ns is attributed to 5vua. (c) 2016 elsevier b.v. all rights reserved.
WOS关键词	FLUORESCENCE UP-CONVERSION ; DENSITY-FUNCTIONAL THEORY ; RADIATIONLESS DECAY ; PYRIMIDINE-BASES ; AB-INITIO ; CONICAL INTERSECTIONS ; INTERNAL-CONVERSION ; SUBSTITUTED URACILS ; AQUEOUS-SOLUTION ; CHARGE-TRANSFER
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000383295300001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376268
专题	中国科学院大学
通讯作者	Yang, Songqiu
作者单位	1.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yan,Yang, Songqiu. Excited-state deactivation of 5-vinyluracil: effects of pi-pi conjugation and intramolecular hydrogen bond c-h center dot center dot center dot o=c[J]. Journal of photochemistry and photobiology a-chemistry,2016,330:1-7.
APA	Liu, Yan,&Yang, Songqiu.(2016).Excited-state deactivation of 5-vinyluracil: effects of pi-pi conjugation and intramolecular hydrogen bond c-h center dot center dot center dot o=c.Journal of photochemistry and photobiology a-chemistry,330,1-7.
MLA	Liu, Yan,et al."Excited-state deactivation of 5-vinyluracil: effects of pi-pi conjugation and intramolecular hydrogen bond c-h center dot center dot center dot o=c".Journal of photochemistry and photobiology a-chemistry 330(2016):1-7.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。