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Spectral Properties of Phthalocyanines Oriented in Stretched Polymer Films

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Danuta Frckowiak,* Rodica-Mariana Ion, and Aneta Waszkowiak

Editorial: J. Phys. Chem. B,, 106 (51),, p.13154 -131, 2002.


Four various phthalocyanines dyes were oriented in uniaxially stretched polymer films. Polarized absorption, fluorescence, and photoacoustic spectra were measured. From a stepwise reduction procedure, the orientation of molecules with respect to the film stretching direction as well as the orientation of absorption transition moments vectors with respect to molecular skeleton of dye were evaluated. The complexation with various metals and the attachment of side groups to the phthalocyanine ring change the orientations and interactions of the dye molecules with polymer chains. Two bands, B1 and B2, with different orientations of their absorption transition moments were found in the short wavelength spectral region. The obtained results were discussed on the ground of literature data and compared with our previously gathered results concerning the possible application of investigated dyes in photodynamic therapy.

Cuvinte cheie: porphyrins, phthalocyanines, PVA