Unsymmetrically mixed β-octasubstituted meso-tetraphenylporphyrins: Structural and electrochemical redox properties

A new class of unsymmetrically mixed β-octasubstituted meso-tetraphenylporphyrins has been reported. These porphyrins reveal a significant red-shift in the electronic absorption spectral bands and an interesting trend in the electrochemical redox properties. The crystal structures of the Ni(II) and...

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Bibliographic Details
Published in:Polyhedron 2015-02, Vol.87, p.170-180
Main Authors: Velkannan, Veerapandian, Bhyrappa, Puttaiah
Format: Article
Language:English
Subjects:
Crystal structures
Metalloporphyrins
NSD analysis
Redox potentials
Substituted porphyrins
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Summary:A new class of unsymmetrically mixed β-octasubstituted meso-tetraphenylporphyrins has been reported. These porphyrins reveal a significant red-shift in the electronic absorption spectral bands and an interesting trend in the electrochemical redox properties. The crystal structures of the Ni(II) and Cu(II) complexes of unsymmetrically substituted porphyrins showed notable differences in the out-of-plane distortion of the non-planar macrocycle. [Display omitted] A new family of unsymmetrically mixed β-octasubstituted porphyrins, H2TPP(Ph)3X5 (X=H, Cl, Br and CH3), and their metal complexes were synthesized. These porphyrins feature red-shifted electronic absorption bands, depending on the nature of the ‘X’ group and following the trend: H
ISSN:0277-5387
DOI:10.1016/j.poly.2014.10.033