Volume-conserved Twist Excited State of pi-Conjugated Molecules

	Volume-conserved Twist Excited State of pi-Conjugated Molecules
	Sun, Qin-chao 1; Liu, Jian-yong 1; Hao, Yan 2; Yang, Xi-chuan 2
刊名	chinese journal of chemical physics
	2010-12-01
卷号	23 期号:6 页码:637-642
关键词	Volume-conserved twisted state Time-resolved photon emission Photoisomerization
英文摘要	the excited state characters of hy103 have been studied by means of time-resolved photon emission (time-correlated single photon counting) and time dependent density functional theory calculations. the experimental and theoretical results demonstrate that hy103 dyes undergo an efficient one-bond-flip motion after photoexicitation at room temperature, which leads to a very short lifetime of the normal fluorescence state, and a weak fluorescence emission around 670 rim. however, when hy103 are excited in amorphous glasses at 77 k, the normal fluorescence emission is prolonged to nanoseconds time scale about 2 us, and the fluorescence emission is enhanced. furthermore, a new emission state is produced, which is characterized as a volume-conserved twisted (vct) state. this is the first observation of a vct state. the experiment indicates that the vct motion of excited state of pi-conjugated molecules in restricted environment can form a stable emission state, and the excited state character of pi-conjugated molecules in restricted environment is complex.
WOS标题词	science & technology ; physical sciences
类目[WOS]	physics, atomic, molecular & chemical
研究领域[WOS]	physics
关键词[WOS]	sensitized solar-cells ; density-functional theory ; high-efficiency ; organic-dyes ; tio2 films ; hula-twist ; photoisomerization ; absorption ; isomerization ; biomolecules
收录类别	SCI
语种	英语
WOS记录号	WOS:000286298900004
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/142147]
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.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China
推荐引用方式 GB/T 7714	Sun, Qin-chao,Liu, Jian-yong,Hao, Yan,et al. Volume-conserved Twist Excited State of pi-Conjugated Molecules[J]. chinese journal of chemical physics,2010,23(6):637-642.
APA	Sun, Qin-chao,Liu, Jian-yong,Hao, Yan,&Yang, Xi-chuan.(2010).Volume-conserved Twist Excited State of pi-Conjugated Molecules.chinese journal of chemical physics,23(6),637-642.
MLA	Sun, Qin-chao,et al."Volume-conserved Twist Excited State of pi-Conjugated Molecules".chinese journal of chemical physics 23.6(2010):637-642.