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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국광과학회 Photochemical & photobiological sciences : an international journal Photochemical & photobiological sciences : an international journal 제8권 제12호
- 발행연도
- 2009.1
- 수록면
- 1,650 - 1,654 (5page)
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Cucurbiturils are cyclic oligomers of glycoluril units whose molecular shape defines an internal hollow space accessible through carbonyl portals. It is known that methyl viologen forms strong host-guest complexes with CB[7] and CB[8]. In the latter case even a dimer can be hosted inside CB[8]. Classical solution systems for visible light $H_2$ generation use methyl viologen as an electron relay. In this work we have found that the efficiency for $H_2$ generation of the photocatalytic system comprising EDTA.ruthenium tris(2,2'-bipyridyl)-methyl viologen-Pt increases when cucurbiturils are present in the solution. The enhancement follows the order CB[6] < CB[7] < CB[8]. By means of laser flash photolysis we have established that this efficiency increase arises from the combination of an increase in the relative quantum yield of charge separation (higher efficiency in the formation of $MV^{{\cdot}+}$) and a decrease of $MV^{{\cdot}+}$ lifetime.
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