2014 Fiscal Year Final Research Report
Effect of structural fluctuation on excited-state reaction processes revealed by temperature-variable single-molecule fluorescence spectrosocopy
| Project/Area Number |
24550018
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | Rikkyo University (2014)
Shizuoka University (2012-2013) |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 単一分子分光 / 蛍光ブリンキング / 電子移動 / 項間交差 / 光安定性 |
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| Outline of Final Research Achievements |
The effect of static/dynamic heterogeneities upon photophysico-chemical processes of fluorescent dyes in various environments were investigated using single-molecule spectroscopy. Consequently, 1) a 10-fold increase in the photostability of the anthracene-based guest due to supramolecular encapsulation was demonstrated. Furthermore, this complex is >30-fold more photostable than rhodamine 6G, 2) an entire picture of heterogeneous photo-induced charge transfer dynamics of single perylenediimide (PDI) molecules in a polymer matrix was revealed, and 3) the photo-induced reaction dynamics occurring in the system of PDI molecules embedded in γ-cyclodextrin (γCD) films were examined. The analyses of fluorescence blinking statistics and theoretical calculations suggest that the hydrogen atom transfer reaction probably occurs between PDI and γCD via higher-lying triplet n,π* states of PDI.
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| Free Research Field |
物理化学、光化学、分子分光学
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