Abstract
Well-defined supramolecular assemblies of Zn and free-base porphyrins are constructed through the formation of amidinium-carboxylate salt bridges. A one-to-one donor-acceptor pair and a four-to-one antenna-type assembly are investigated. The steady-state and time-resolved fluorescence measurements unequivocally showed that efficient singlet-singlet excited energy transfer from the Zn-porphyrin complex to the free-base porphyrin takes place in these assemblies. Indeed, the observed energy-transfer rates in both types of assemblies are much faster than those the Förster mechanism would suggest, implying the involvement of an intermolecular through-bond mechanism.
Original language | English |
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Pages (from-to) | 3461-3466 |
Number of pages | 6 |
Journal | Chemistry - A European Journal |
Volume | 10 |
Issue number | 14 |
DOIs | |
Publication status | Published - 2004 Jul 19 |
Keywords
- Energy transfer
- Porphyrinoids
- Salt bridges
- Supramolecular chemistry
- Through-bond mechanism
ASJC Scopus subject areas
- Catalysis
- Organic Chemistry