Synthesis, characterization and catalytic oxidation performance of new planar binuclear phthalocyanines sharing the benzene ring

Abstract

The crude product of hexacarboxy biphtalocyanines cobalt ( CoBPcC6 ) was synthesized by fusing trimellitic anhydride, pyromellitic dianhydride, urea and CoCl2 · 6H2O with ammonium molybdate as catalyst and then hydrolyzed under alkaline conditions. The crude product was isolated by acidifying with hydrochloric acid followed by filtration, then purified by reprecipitation from concentrated sulfuric acid followed by chromatography on silica gel column. CoBPcC6 was characterized by IR, UV-vis, 1 H NMR, elemental analysis, etc. The activity of CoBPcC6 catalyst for extractive sweetening was evaluated by studying mercaptide oxidation. It was found that the performance of this immobilized catalyst was better than the commercial immobilized catalyst.