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Synthesis and photophysical properties of octa-substituted phthalocyaninato oxotitanium(IV) derivatives

Prudence Tau

Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa

student member in good standing

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and

Tebello Nyokong

Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa

Corresponding author, fax: +27 46-622-5109

SPP full member in good standing

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https://doi.org/10.1142/S1088424606000399Cited by:16 (Source: Crossref)

Abstract

The synthesis, spectral and photophysical properties including fluorescence quenching of the following octa-substituted oxotitanium phthalocyanines are reported: 2,3,9,10,16,17,23,24-octaphenoxyphthalocyaninato titanium(IV) oxide, 2,3,9,10,16,17,23,24-[octakis(4-t-butylphenoxyphthalocyaninato)]titanium(IV) oxide, 2,3,9,10,16,17,23,24-{octakis[(4-benzyloxy)phenoxy]phthalocyaninato}titanium(IV) oxide and 2,3,9,10,16,17,23,24-octaphenylthiophthalocyaninato titanium(IV) oxide. The complexes are characterized by ¹H NMR, IR and UV-vis spectroscopies. Their photophysical properties are presented where moderate fluorescence quantum yields (0.14-0.19) and lifetimes were determined. Varied triplet quantum yields were obtained and the triplet lifetimes (40-100 μs) were short.

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