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题名: Site-selective photoinduced electron transfer from alcoholic solvents to the chromophore facilitated by hydrogen bonding: A new fluorescence quenching mechanism
作者: Zhao, Guang-Jiu;  Liu, Jian-Yong;  Zhou, Li-Chuan;  Han, Ke-Li
通讯作者: 韩克利
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2007-08-02
DOI: 10.1021/jp0734530
卷: 111, 期:30, 页:8940-8945
收录类别: SCI
文章类型: Review
部门归属: 1100
项目归属: 1101
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Solute-solvent intermolecular photoinduced electron transfer (ET) reaction was proposed to account for the drastic fluorescence quenching behaviors of oxazine 750 (OX750) chromophore in protic alcoholic solvents. According to our theoretical calculations for the hydrogen-bonded OX750-(alcohol)(n) complexes using the time-dependent density functional theory (TDDFT) method, we demonstrated that the ET reaction takes place from the alcoholic solvents to the chromophore and the intermolecular ET passing through the site-specific intermolecular hydrogen bonds exhibits an unambiguous site selectivity. In our motivated experiments of femtosecond time-resolved stimulated emission pumping fluorescence depletion spectroscopy (FS TR SEP FD), it could be noted that the ultrafast ET reaction takes place as fast as 200 fs. This ultrafast intermolecular photoinduced ET is much faster than the diffusive solvation process, and even significantly faster than the intramolecular vibrational redistribution (IVR) process of the OX750 chromophore. Therefore, the ultrafast intermolecular ET should be coupled with the hydrogen-bonding dynamics occurring in the sub-picosecond time domain. We theoretically demonstrated for the first time that the selected hydrogen bonds are transiently strengthened in the excited states for facilitating the ultrafast solute-solvent intermolecular ET reaction.
关键词[WOS]: STATE PROTON-TRANSFER ;  EXCITED-STATE ;  CHARGE-TRANSFER ;  SUPER PHOTOACIDS ;  VIBRATIONAL SPECTROSCOPY ;  SPECTRAL PROPERTIES ;  SOLVATION DYNAMICS ;  DONATING SOLVENTS ;  ANTHRANILIC ACID ;  BONDED COMPLEXES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000248315700037
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98681
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, Liaoning, Peoples R China

Recommended Citation:
Zhao, Guang-Jiu,Liu, Jian-Yong,Zhou, Li-Chuan,et al. Site-selective photoinduced electron transfer from alcoholic solvents to the chromophore facilitated by hydrogen bonding: A new fluorescence quenching mechanism[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2007,111(30):8940-8945.
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