期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 15, 期 11, 页码 2617-2624出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200801557
关键词
axial ligation; dendrimers; porphyrins; zinc
资金
- Innovation Creative Center for Advanced Interdisciplinary Research Areas
- Ministry of Education, Culture, Sports, Science and Technology of Japan
A series of dendritic porphyrins 7-9 and 12, in which benzyl ether dendrons were linked to a porphyrin core through 1,2,3-triazole links, were synthesized by Cu-1-catalyzed cycloaddition of azides and alkynes. Absorption and fluorescence spectra showed a stable axial ligation at the zinc center of the porphyrin core by triazole links in dendritic wedges and indicated that the position of the triazole links strongly affected the stability of the axial ligation within the dendrimer. When the porphyrin core was surrounded by aryl ether dendrons having anionic termini and triazole linkers, a significant rate enhancement for photoinduced electron transfer was observed compared with a similar water-soluble dendritic zinc porphyrin lacking triazole linkers. These triazole links constituted a direct pathway within the dendrimer architecture for electron transfer between the zinc porphyrin core and peripheral electron acceptors.
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