Control of laser-induced reaction by quantum wave packet

量子波包控制激光诱导反应

• 批准号: 16550115
• 负责人: NISHIMURA Yoshinobu
• 金额: $ 2.37万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16550115/
• 关键词: double pulse; stilbene; phenylacetyl; fluorescence spectra; excitation spectra; intramolecular energy transfer; absorption spectra; fluorescence lifetime; 極低温; ポルフィリン; ガラス基板; 会合体形成; 一重項酸素の発光

Energy migration and emitting state of a series of dendrimers connected by a phenylacetylene group bearing stilbene as a core were studied by steady state and time-resolved fluorescence spectroscopy. In higher generation, we confirmed efficient energy migration from peripheral moiety to a core followed by emission with high quantum yield. The kinetics of emitting state was also examined by lifetime measurement and revealed generation dependence of fluorescence decay constants. In the case of higher generation, peripheral moieties might be involved in relaxation process in the excited state in contrast to negligible interaction to the core in the ground state.Obtained results suggest that the emissive state of p-Gn, where n means the generation number of a dendrimer, is the electronic state associated with core stilbene moiety and highly effective intramolecular energy migration occurs in p-G2 from peripheral ethynyl-BuPh to core stilbene followed by emission with high quantum yield. These properties will gives the possibility to organize light emitting materials bearing light harvesting and emitting assemblies. In future, I will try to measure quantum coherence of these samples to reveal electro coupling between core and peripheral parts in the excited state.

用稳态荧光光谱和时间分辨荧光光谱研究了以二苯乙烯为核的苯乙炔基连接的树枝状大分子的能量迁移和发光状态。在更高的世代中，我们证实了从外围部分到核心的有效能量迁移，然后以高量子产率发射。发射态的动力学也通过寿命测量进行了研究，并揭示了荧光衰减常数的世代依赖性。在高代数的情况下，在激发态，外围部分可能参与弛豫过程，而在基态，与核心的相互作用可以忽略不计.所得结果表明，p-Gn的发射态，其中n是指树枝状大分子的代数，是与核心芪部分相关的电子状态，并且在p-G2中发生从外围乙炔基-BuPh到核心芪，然后以高量子产率发射。这些性质将给出组织承载光收集和发射组件的发光材料的可能性。在未来，我将尝试测量这些样品的量子相干性，以揭示激发态下核心和外围部分之间的电耦合。

项目成果

Recognition of substituted cytosine derivatives by the base pairing with guanine connected to pyrene.

通过与连接芘的鸟嘌呤的碱基配对来识别取代的胞嘧啶衍生物。

• 发表时间: 2005
• 期刊: Chemical Physics Letters 407(1-3)
• 作者: Kawai;Takahiro
• 通讯作者: Takahiro

Substituent effects of porphyrin monolayers on the structure and photoelectrochemical properties of self-assembled monolayers of porphyrin on indium-tin oxide electrode

• DOI: 10.1021/jp037625e
• 发表时间: 2004-04-22
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY B
• 影响因子: 3.3
• 作者: Imahori, H;Hosomizu, K;Matano, Y
• 通讯作者: Matano, Y

Recent progress of bio/chemiluminescence and fluorescence analysis in photosynthesis

光合作用生物/化学发光和荧光分析的最新进展

• 发表时间: 2005
• 作者: N.Wada;M.Mimuro (編集)
• 通讯作者: M.Mimuro (編集)

The relaxation dynamics of the excited state of stilbene dendrimers substituted with phenylacetylene groups

苯乙炔基取代的二苯乙烯树枝状聚合物激发态的弛豫动力学

• 发表时间: 2006
• 期刊: Journal of Photochemistry and Photobiology A : Chemistry 178
• 作者: Nishimura;Yoshinobu
• 通讯作者: Yoshinobu