Sridevi, B. ; Jeyaprakash Narayanan, S. ; Srinivasan, A. ; Reddy, M. V. ; Chandrashekar, T. K. (1998) Spectroscopic and electrochemical studies on oxaporphyrins and oxathiaporphyrins Journal of Porphyrins and Phthalocyanines, 2 (1). pp. 69-78. ISSN 1088-4246
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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1...
Related URL: http://dx.doi.org/10.1002/(SICI)1099-1409(199801/02)2:1<69::AID-JPP55>3.0.CO;2-1
Abstract
The synthesis and characterization of oxaporphyrins (OTPP and O2TPP) containing one and two furan rings in place of pyrrole and a mixed oxathiaporphyrin (OSTPP) is reported. Spectroscopic and electrochemical studies reveal that oxaporphyrins exhibit optical and emission characteristics closer to the parent H2TPP, while their electrochemical behaviour parallels that reported for mono and dithiaporphyrins. However the characteristics of the mixed oxathia derivative resemble that of monothiaporphyrin. Protonation studies reveal weaker resonance interaction between the β -hydrogens and meso-phenyl substituents in sharp contrast to thiaporphyrins. The reduction potentials for OSTPP and O2TPP indicate stabilization and destabilization of their LUMOs relative to the parent H2TPP in the ground and excited states, respectively.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to John Wiley and Sons. |
| Keywords: | Oxaporphyrins; Thiaporphyrins; Oxathiaporphyrins; Synthesis; Electrochemical Study |
| ID Code: | 85824 |
| Deposited On: | 06 Mar 2012 07:18 |
| Last Modified: | 06 Mar 2012 07:18 |
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