Antenna Effects of Dendric Mjultichromophore Arrays and Photochemical Tandem Reaction

树枝状多发色团阵列的天线效应和光化学串联反应

• 批准号: 11223204
• 负责人: AIDA Takuzo
• 金额: $ 21.76万
• 依托单位: UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11223204/
• 关键词: Dendrimer; Porphyrin; Light-Harvesting Antenna; Artificial Photosynthesis; Energy Migration; 光捕集アンテナ機能; ポロフィリン; デントリマー; 分子内エネルギー移動; 協同作用; 光エネルギー変換; 光励起エネルギー貯蔵

The following information was obtained through researches in three years.1 Excitation energy absorbed at peripheral aromatic groups was transmitted to the porphyrin at the center of the dendrimer in 80% of the high efficiency. The efficiency decreased to less than 30% of the globular dendrimer when the morphology of the dendrimer was non-globular. High-speed migration of excitation energy between dendrons was suggested from the measurement of fluorescence anisotropy.The energy of visible light absorbed into the dendrimers composed from porphyrins also transferred to the focal point more than 70%. Similar conclusion as 1 was obtained from the morphology dependency of the energy transfer efficiency and the measurement of fluorescence anisotropy.One of the general guidelines for highly efficient energy funneling was the design of spherical orientation of photofunctional molecules and the high utility of dendrimers was demonstrated.

通过三年的研究得到以下信息：1在外围芳香基团处吸收的激发能以80%的高效率传递到树枝状大分子中心的卟啉。当树枝状聚合物的形态为非球形时，效率降低到球形树枝状聚合物的30%以下。荧光各向异性的测量结果表明，树枝状大分子的激发能在树枝状大分子之间发生了高速迁移，由卟啉组成的树枝状大分子吸收的可见光能量也有70%以上转移到焦点。从能量转移效率的形态依赖性和荧光各向异性的测量中得到了与1相似的结论。高效能量泛函的一般指导方针之一是设计光功能分子的球形取向，并证明了树枝状大分子的高效用。

项目成果

Takuzo Aida, Dong-Lin Jiang: "Handbooks of Porphyrins and Related Macrocycles:Biomaterials for Biomaterials Scientists,Chemists,physicists"Academic Press(Chapter23). 16 (1999)

会田卓三、蒋东林：《卟啉及相关大环化合物手册：生物材料科学家、化学家、物理学家的生物材料》学术出版社（第23章）。

T. Aida: "Handbook of Porphyrins and Related Macrocycles: Biomimetic Scientists, Chemists, Physicists"Academic Press. 16 (1999)

T. Aida：《卟啉和相关大环化合物手册：仿生科学家、化学家、物理学家》学术出版社。

Takuzo Aida, Dong-Lin Jiong: "Handbooks of Porphyrins and Related Macrocycles : Biomaterials for Biomaterials Scientists, Chemists, Physicists"Academic Press (Chapter 23). 16 (1999)

Takuzo Aida、Dong-Lin Jiong：“卟啉和相关大环化合物手册：生物材料科学家、化学家、物理学家的生物材料”学术出版社（第23章）。

T. Sato: "A lue-luminescence dendritic rod: Poly(phenyleneethynylene) within a light-harvesting dedritic envelope"J. Am. Chem. Soc.. 121. 10658-10659 (1999)

T. Sato：“光发光树枝状棒：光捕获树枝状包膜内的聚（亚苯基乙炔基）”J。

D.-L. Jiang: "Dendrimers and Other Dendritic Polymers, Eds. By M. J. Frechet and D. Tomalia"John wiley & Sons. 15 (2001)

D.-L。