2011 Fiscal Year Final Research Report
Mechanism of the fluorescence enhancement of polycyclic aromatic ketones
| Project/Area Number |
21550025
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | Toho University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Keywords | 光化学 / 蛍光増強 / 溶媒効果 / 会合体 |
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| Research Abstract |
The fluorescence intensity for degassed solution of polycyclic aromatic ketones such as benzanthrone and naphthanthrone was enhanced after pre-irradiation with strong light. We investigated the effects of intensity of pre-irradiation, concentration, and temperature on the enhancement. The results indicated that the fluorescence enhancement arises from an association complex between solute and solvent molecules. To identify such association complexes, we analyzed solutions exhibiting the fluorescence enhancement by HPLC and TOF-MAS. Both the experimental results showed that the signal for a solute molecule decreased in the chromatogram and mass spectrum and new signals appeared. We analyzed the new signals and assigned them to a chemical species having masses of one solute and thirteen solvent molecules. The species are considered as the association complex causing the fluorescence enhancement.
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Research Products
(7 results)
