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题名: Volume-conserved Twist Excited State of pi-Conjugated Molecules
作者: Sun, Qin-chao1;  Liu, Jian-yong1;  Hao, Yan2;  Yang, Xi-chuan2
关键词: Volume-conserved twisted state ;  Time-resolved photon emission ;  Photoisomerization
刊名: CHINESE JOURNAL OF CHEMICAL PHYSICS
发表日期: 2010-12-01
DOI: 10.1088/1674-0068/23/06/637-642
卷: 23, 期:6, 页:637-642
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
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.
关键词[WOS]: SENSITIZED SOLAR-CELLS ;  DENSITY-FUNCTIONAL THEORY ;  HIGH-EFFICIENCY ;  ORGANIC-DYES ;  TIO2 FILMS ;  HULA-TWIST ;  PHOTOISOMERIZATION ;  ABSORPTION ;  ISOMERIZATION ;  BIOMOLECULES
语种: 英语
WOS记录号: WOS:000286298900004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142070
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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

Recommended Citation:
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.
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