Synthesis and characterization of tetranitro and tetraamino zinc phthalocyanines and their combinations with mica-titania pigment

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2014
Sönmez, Yasemin
In the present study, tetranitro and tetraamino substituted zinc phthalocyanine were synthesized by using nitro phthalic acid precursor under microwave irradiation. The products were purified using different solvents. Molecular structures of these phthalocyanine pigments were confirmed by FT-IR and UV-visible spectroscopy analyses. Each of these pigments was settled on the surface mica-titania pigment to obtain ‘combination pigment’. Tetraamino zinc phthalocyanine was deposited on mica-titania in water and in dimethyl formamide used as solvent, while tetranitro zinc phthalocyanine was deposited in chloroform. The pH effect was investigated by using acetic acid and trifluoro acetic acid. The conditions for optimum deposition time, solvent, pH and the amount of phthalocyanine were studied. The FT-IR, XPS and elemental analysis were conducted to analyze the pigment deposited on the vi surface of the mica-titania substrate. Moreover, the fluorescence properties of tetranitro and tetraamino zinc phthalocyanines and their combinations by mica-titania pigment were obtained in DMF solvent. The surface morphology of synthesized pigments was analyzed by scanning electron microscopy (SEM). The paint samples of these pigments were prepared by water based styrene acrylic resin formulation. The L*a*b* color properties of the pigments were examined by color spectrophotometer. These analyses indicated that pigments were successfully synthesized and combined with mica-titania pigment. The best result with tetranitro zinc phthalocyanine was obtained in chloroform solvent at 50°C, in 5h, and at a pH of 5; while the best result with tetraamino zinc phthalocyanine in DMF with acetic acid at 120°C, in 3h and at a pH of 4. The amount deposited increased with the amount of phthalocyanines in solution. Mica-titania substrate reduced the fluorescence of phthalocyanine pigments. But on the other side, the fluorescent property of the mica-titania were developed with combination of tetra amino and nitro phthalocyanines. It was observed that, with the increasing amount of tetranitro and tetraamino zinc phthalocyanine, the deposited amount of pigment increased on mica-titania, as well. As a result high gloss fluorescent

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Citation Formats
Y. Sönmez, “Synthesis and characterization of tetranitro and tetraamino zinc phthalocyanines and their combinations with mica-titania pigment,” M.S. - Master of Science, Middle East Technical University, 2014.