Photophysical and photochemical properties of fluoroether-substituted zinc(II) and titanium(IV) phthalocyanines

Abstract

The synthesis and characterization of novel zinc(II) (1a-4a) and oxo-titanium(IV) (1b-4b) phthalocyanine derivatives bearing 1H, 1H-nona.uoro-3,6-dioxaheptan-1-ol groups are described for the first time. These phthalocyanines (1a-4a and 1b-4b) were characterized by elemental analysis and different spectroscopic techniques such as UV-vis, H-1 NMR, FTIR and mass. Furthermore, the photophysical (fluorescence quantum yields and lifetimes) and photochemical (singlet oxygen generation and photodegradation) properties of these phthalocyanines were investigated in tetrahydrofuran (THF) solution. The influence of the number of the substituted groups (tetra or octa), position of the substituents (peripheral or non-peripheral) and central metal atom (zinc or titanium) on the photophysical and photochemical properties of these phthalocyanines were evaluated.