Electrochemical behavior of phthalocyanines containing high oxidation state central metals: Titanium(IV), vanadium(IV), and tantalum(V)

Vongani P. Chauke, Yasin Arslanoglu, Tebello Nyokong*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The syntheses of 2,(3)-(peripheral) and 1,(4)-(non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium(IV) oxide (5a and 6a, respectively), vanadium(IV) oxide (7a and 8a, respectively) and tantalum(V) hydroxide (9a, peripheral only) and their electrochemical characterization are presented in this report. Their electrochemistry is compared to that of thiophenyl and thiobenzyl substituted derivatives. The non-peripherally substituted complexes are more difficult to reduce than peripherally substituted derivatives. In addition, the mercaptopyridine substituted derivatives are more difficult to reduce compared to benzylmercapto and phenylmercapto derivatives, and aryl easier reduce than alkyl substitution. Spectroelectrochemistry of the complexes confirmed metal and ring redox processes for TaPc and TiPc derivatives and ring based processes only for VPc complexes.

Original languageEnglish
Pages (from-to)2132-2139
Number of pages8
JournalPolyhedron
Volume30
Issue number12
DOIs
Publication statusPublished - 2011

Funding

This work was supported by the Department of Science and Technology (DST) and National Research Foundation (NRF) , South Africa through DST/NRF South African Research Chairs Initiative for Professor of Medicinal Chemistry and Nanotechnology as well as Rhodes University.

FundersFunder number
National Research Foundation
Rhodes University
Department of Science and Technology, Ministry of Science and Technology, India

    Keywords

    • Cyclic voltammetry
    • Phthalocyanines
    • Spectroelectrochemistry
    • Tantalum
    • Titanium
    • Vanadium

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