Chandrashekar, T. K. ; Willigen, Hans Van (1984) ESR study of photoexcited triplets of some tetra(4-sulfonatophenyl)porphyrin dimers Chemical Physics Letters, 106 (3). pp. 237-241. ISSN 0009-2614
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0009-2614(84)80233-X
Abstract
Tetra (4-sulfonatophenyl)porphyrin (H2TPPS), and the metalloporphyrins ZnTPPS and PdTPPS dimerize in aqueous solution. An ESR study has been made of the photoexcited triplets of the [ZnTPPS]2. [H2TPPS/ZnTPPS] and [H2TPPS/PdTPPS] dimers. It is found that there is a strong dimerization effect on the values of the zero field splitting parameters of the triplets. This contrasts with what has been reported for photoexcited triplets of a series of covalently-linked tetrapyrroles. The experimental data indicate that the dimerization effect on the TPPS triplet parameters must be attributed to charge transfer contributions to the triplet electronic state.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 85811 |
| Deposited On: | 06 Mar 2012 07:14 |
| Last Modified: | 06 Mar 2012 07:14 |
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