Synthesis and spectral and thermal characterization of new metal-free and metallophthalocyanines: investigation of their photophysical, photochemical, and thin film properties

Authors : Elif Çelenk KAYA, Mahmut DURMUŞ, Ekrem YANMAZ, Halit KANTEKİN

Pages : 1118-1134

Doi:10.3906/kim-1406-25

View : 15 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Novel tetrasubstituted metal-free insert ignore into journalissuearticles values(2);, zinc insert ignore into journalissuearticles values(II); insert ignore into journalissuearticles values(3);, cobalt insert ignore into journalissuearticles values(II); insert ignore into journalissuearticles values(4);, and copper insert ignore into journalissuearticles values(II); insert ignore into journalissuearticles values(5); phthalocyanines bearing 2-phenylethanolate groups on the peripheral positions were synthesized by the cyclotetramerization reaction of the phthalonitrile derivative 1. The new compounds were characterized by a combination of IR, 1H NMR, 13C NMR, UV-Vis, elemental analysis, and MS spectra data. The thermal stabilities of the phthalocyanine compounds were determined by thermogravimetric analysis. For metal-free insert ignore into journalissuearticles values(2); and zinc insert ignore into journalissuearticles values(3); phthalocyanines, photochemical insert ignore into journalissuearticles values(photodegradation and singlet oxygen quantum yields); and photophysical insert ignore into journalissuearticles values(fluorescence quantum yields and fluorescence lifetimes); properties were analyzed in dimethylsulfoxide insert ignore into journalissuearticles values(DMSO);. The cobalt insert ignore into journalissuearticles values(4); and copper insert ignore into journalissuearticles values(5); phthalocyanines were not evaluated for this purpose because of their paramagnetic behavior. The metal-free insert ignore into journalissuearticles values(2); and zinc insert ignore into journalissuearticles values(3); phthalocyanines` fluorescence quenching behaviors were also investigated. The new phthalocyanine compounds` fluorescence emissions were effectively quenched by 1,4-benzoquinone in DMSO. The thin films of the cobalt phthalocyanine compound insert ignore into journalissuearticles values(4); were grown by electron beam evaporation technique. Crystalline CoPc insert ignore into journalissuearticles values(4); thin films were investigated by X-ray diffraction spectroscopy. Surface morphology of the CoPc insert ignore into journalissuearticles values(4); thin films was characterized by SEM.
Keywords : Phthalocyanine, fluorescence, quantum yields, singlet oxygen, photodegradation, thin film