Formation of zinc phthalocyanine on polymethyl methacrylate chain: Its nanographene-based composite, thermal, electrical and optical behaviors

Abstract

Poly[4-((4-vinylbenzyl)oxy) phthalonitrile-co-methyl methacrylate] [P(VBOPN10.7%-co-MMA)] was prepared by atom transfer radical polymerization (ATRP) method at 110?. Green colored single chain polymer molecule via intramolecular formation of zinc phthalocyanine (SCP-ZnPc) on polymer chain was synthesized using VBOPN as a precursor copolymer under conditions of dilute cyclohexanol and at 140-150?. The successful formation of zinc phthalocyanine on a single chain molecule was confirmed using Fourier-transform infrared spectroscopy (FT-IR) and UV/Vis spectroscopy techniques. Nanogaphene-based SCP-ZnPc composite was prepared to employ 6 weight (wt)% of total weight and were investigated its thermal, electrical, dielectric and optical properties. The dielectric and DC electrical conductivity of SCP-ZnPc/NG 6 wt% nanocomposite were found to increase depending upon temperature. And the conduction obeyed the Arrhenius relationship with the activation energy, E-a values for I. and II. regions were 0.345 eV and 0.275 eV, respectively. The optical constants (refractive index, real value of optical dielectric constant) and the optical band gap of SCP-ZnPc/NG 6 wt% were estimated. The direct band gap and refractive index of SCP-ZnPc/NG 6 wt% were estimated, and its direct band gap was estimated as 2.7 eV.