Abstract
Conformationally distorted tetrapyrroles can be used as appropriate biomimetic model compounds as they resemble naturally occurring pyrroles and also find applications in material chemistry [1]. Also, fused chlorins and porphyrins are having potential biological and material applications [2]. Nitroporphyrins are good precursors as they undergo nucleophilic substitution reaction with wide range of Michael donors [3]. Nucleophilic addition at the β-position results in the formation of porphyrins as well as chlorins based on the temperature and size of active methylene compound which can be further converted to mono- and di-fused porphyrins [4]. Herein, we report the facile syntheses, spectroscopic and redox properties of hepta- and octa-substituted porphyrins and their fused derivatives. CuDFP(MN)2Br6 and CuMFP(MN)Br6 exhibited anodic shift in redox potentials as compared to precursor porphyrins and hence lower HOMO-LUMO gap was observed. In this presentation, we will describe about the synthesis, structural, spectral and intriguing electrochemical redox properties of fused porphyrins and chlorins. Fig. 1. Molecular Structure of β-monofused porphyrins and comparative CVs of CuTPP, CuMFPMNBr6 and CuDFP(MN)2Br6.
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