Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 17, Issue 41, Pages 11628-11636Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201101043
Keywords
donor-acceptor systems; electron transfer; fullerenes; porphyrinoids; self-assembly
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Japan Society for the Promotion of Science
- Grants-in-Aid for Scientific Research [10J01768] Funding Source: KAKEN
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A new approach for fabricating donor-acceptor assembled systems is demonstrated, based on J-type ordered aggregation of a low-molecular zinc porphyrin derivative and subsequent integration of a pyridylated fullerene derivative with coordination and orientation onto the porphyrin aggregates. This system achieves unusually high efficiencies in fluorescence quenching during one-to-one mixing of the donor and acceptor. Moreover, the Stern-Volmer constant (K-SV) and association constant (K) of this system are 2520 and 56 times higher, respectively, than those of the corresponding nonassembled system. The quenching efficiency is thermotropically switchable, since ordered-to-disordered transitions are essential characteristics of noncovalent low molecular assemblies.
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