Synthesis, spectroscopy and electrochemistry of octaphenoxyphthalocyaninato silicon complexes

A number of octaphenoxyphthalocyaninato silicon complexes containing a variety of axial ligands, represented by (OPh)8PcSi(X)2 (where X = chloro 3, hydroxy 4, (4‐carboxybenzene) acetato 5, isonicatinato 6, propionato 7, nitrophenoxy 8 and dimethylaminoxy 9) have been synthesized using a convenient r...

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Bibliographic Details
Published in:Journal of porphyrins and phthalocyanines 2001-07, Vol.5 (7), p.555-563
Main Authors: Maree, M. David, Nyokong, Tebello
Format: Article
Language:English
Subjects:
cyclic voltammetry
phenoxy
silicon phthalocyanine
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Summary:A number of octaphenoxyphthalocyaninato silicon complexes containing a variety of axial ligands, represented by (OPh)8PcSi(X)2 (where X = chloro 3, hydroxy 4, (4‐carboxybenzene) acetato 5, isonicatinato 6, propionato 7, nitrophenoxy 8 and dimethylaminoxy 9) have been synthesized using a convenient route starting with the 4,5‐diphenoxy‐1,2‐dicyanobenzene. 1H NMR and UV/vis spectra, and the cyclic voltammetry of the complexes are reported. The complexes are obtained in high yield and are soluble in many organic solvents. Cyclic voltammetry revealed two reduction couples and one oxidation couple for these complexes. Analysis of the cyclic voltammograms showed that compounds 6 and 8 were easier to oxidize and more difficult to reduce than the rest. Also cyclic voltammetry data suggested that electron transfer was not governed only by diffusion. Copyright © 2001 John Wiley & Sons, Ltd.
ISSN:1088-4246
1099-1409
DOI:10.1002/jpp.361