Synthesis of some new tetra-arylporphyrins for studies in solar energy conversion
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- p. 2535-2539
- https://doi.org/10.1039/p19830002535
Abstract
The synthesis of tetra-arylporphyrins, for studies in solar energy conversion, is described. They are derived from 5,10,15,20-meso-tetrakis(4-hydroxyphenyl)porphyrin (4) which, in basic media, forms a green intermediate that is probably the tetraphenoxide (6). The porphyrins (10) and (13), were synthesised as prospective sensitisers for catalysed microheterogenous water photo-oxidation. U.v./visible spectroscopy demonstrates that the porphyrin (10) aggregates in aqueous solution. Cyclic voltammetry shows that the porphyrin (13) behaves as a typical viologen with bulky substituents. A pentameric porphyrin (15) was synthesised and characterised in order to model energy transfer in photosynthetic chlorophyll antennae. There is some evidence that weak singlet-energy transfer occurs between the porphyrin sub-units of the pentamer.Keywords
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