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Int. J. Mol. Sci. 2012, 13(7), 8112-8125; doi:10.3390/ijms13078112
Article

Synthesis and Spectral Evaluation of Some Unsymmetrical Mesoporphyrinic Complexes

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 and
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Received: 15 February 2012 / Revised: 13 June 2012 / Accepted: 21 June 2012 / Published: 29 June 2012
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Abstract

Synthesis and spectral evaluation of new zinc and copper unsymmetrical mesoporphyrinic complexes are reported. Zn(II)-5-(4-acetoxy-3-methoxyphenyl)-10,15,20-tris-(4-carboxymethylphenyl)porphyrin, Zn(II)-5-[(3,4-methylenedioxy)phenyl]-10,15,20-tris-(4-carboxymethylphenyl)porphyrin, Cu(II)-5-(4-acetoxy-3-methoxyphenyl)-10,15,20-tris-(4-carboxymethylphenyl)porphyrin and Cu(II)-5-[(3,4-methylenedioxy)phenyl]-10,15,20-tris-(4-carboxymethylphenyl)porphyrin were synthesized using microwave-assisted synthesis. The complexes were characterized by elemental analysis, FT-IR, UV-Vis, EPR and NMR spectroscopy, which fully confirmed their structure. The spectral absorption properties of the porphyrinic complexes were studied in solvents with different polarities. Fluorescence emission and singlet oxygen formation quantum yields were evaluated for the compounds under study, revealing high yields for the zinc derivatives. The copper complexes are not emissive and only display residual capacity for singlet oxygen formation.
Keywords: unsymmetrical mesoporphyrinic complexes; microwave-assisted synthesis; solvatochromism; singlet oxygen; fluorescence quantum yields unsymmetrical mesoporphyrinic complexes; microwave-assisted synthesis; solvatochromism; singlet oxygen; fluorescence quantum yields
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Boscencu, R.; Oliveira, A.S.; Ferreira, D.P.; Ferreira, L.F.V. Synthesis and Spectral Evaluation of Some Unsymmetrical Mesoporphyrinic Complexes. Int. J. Mol. Sci. 2012, 13, 8112-8125.

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