Synthesis of novel chalcone substituted metallophthalocyanines: Electrochemistry, spectroelectrochemistry, and catalytic oxidation of 2-mercaptoethanol

Abstract

Novel metallophthalocyanines (M = Zn, Co) carrying four (E)-1-(furan-2-yl)-3-(4-hydroxyphenyl)prop-2-en-1-one (chalcone) at the peripheral positions were sythesized. These complexes have been characterized by a combination of infrared spectroscopy (FT-IR), proton NMR (1H-NMR), high resolution mass spectroscopy (HRMS), and ultraviolet visible (UV–Vis) spectrophotometry techniques. Also, cyclic voltammograms of these phthalocyanines were recorded and zinc phthalocyanine has one and cobalt phthalocyanine has two reduction reactions. Spectroelectrochemical investigation shows the ring-based reduction of MPcs. Pc-7 cobalt(II) phthalocyanine was investigated as a catalyst in the catalytic oxidation of 2-mercaptoethanol. Turnover number, initial reaction rate, and the oxygen consumption were found in the catalytic oxidation of 2-mercaptoethanol as 16.6, 0.29, 2.52, respectively.