New soluble methylendioxy-phenoxy-substituted zinc phthalocyanine derivatives: synthesis, photophysical and photochemical studies

Erdoğmuş, A. and Nyokong, T. (2009) New soluble methylendioxy-phenoxy-substituted zinc phthalocyanine derivatives: synthesis, photophysical and photochemical studies. Polyhedron, 28 (14). pp. 2855-2862. ISSN 0277-5387

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Official URL: http://dx.doi.org/10.1016/j.poly.2009.06.019

Abstract

The syntheses of new three phthalonitriles (1, 2 and 3), together with photophysical and photochemical properties of the resulting peripherally and non-peripherally tetrakis- and octakis 3,4-(methylendioxy)-phenoxy-substituted zinc phthalocyanines (4, 5 and 6) are described for the first time. Complexes 4, 5 and 6 have been synthesized and characterized by elemental analysis, IR, 1H NMR spectroscopy, electronic spectroscopy and mass spectra. Complexes 4, 5 and 6 have good solubility in organic solvents such as CHCl3, DCM, DMSO, DMF, THF and toluene and are mainly not aggregated (except for complex 6 in DMSO) within a wide concentration range. General trends are described for singlet oxygen, photodegradation, fluorescence quantum yields, triplet quantum yields and triplet life times of these complexes in DMSO and toluene. Complex 4 has higher singlet oxygen quantum yields, fluorescence quantum yields, triplet quantum yields and triplet life times than complexes 5 and 6. The effect of the solvents on the photophysical and photochemical parameters of the zinc(II) phthalocyanines (4, 5 and 6) are also reported.

Item Type:Article
Uncontrolled Keywords:Fluorescence quantum yield; Photodynamic therapy; Singlet oxygen; Triplet quantum yield; Zinc phthalocyanines
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Chemistry
ID Code:1503
Deposited By: Mrs Eileen Shepherd
Deposited On:30 Sep 2009
Last Modified:06 Jan 2012 16:20
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