Synthesis and characterization of peripheral and non-peripheral substituted Co(II) phthalocyanines and their catalytic activity in styrene oxidation

Peripherally 1,2-dinaphthyl ethanediol substituted phthalocyanine complexes:synthesis, characterization, aggregation, and application in benzyl alcoholoxidation at room temperature

“…We found that increasing the oxidant to catalyst ratio from 100/1 to 200/1 led to the selective oxidation of benzyl alcohol to benzaldehyde with total conversion of 99% and 100% selectivity (TON = 198), but further increasing the oxidant ratio led to a decrease in the catalytic activity (up to 27%) (compare entries 1-7). These results support that in the presence of a higher amount of oxidant, the active sites of cobalt ion are blocked and this effect leads to the generation of inactive intermediate species during the catalytic reaction [31][32][33][34][35][36]. For the amounts of catalyst used influencing the results of the selective oxidation of benzyl alcohol, the effect of substrate to catalyst ratio was also investigated by varying from 200/1 to 1500/1 under optimized conditions ( Table 3).…”

Synthesis, electrochemistry of metal-free, copper, titanium phthalocyanines and investigation of catalytic activity of cobalt, iron phthalocyanines on benzyl alcohol oxidation bearing 4-{2-[3-trifluoromethyl)phenoxy]ethoxy} groups

“…The excess oxidant effects coordination around the ıron and cobalt ion and leads to the generation of inactive intermediate species. [37][38][39][40][41]. This study showed that only 500/1 ratio of oxidant/catalyst was needed for the reaction to get an optimum conversion of benzyl alcohol to reduced products.…”

Novel pthalocyanines bearing 4-ferrocenylphenoxy substituents and their electrochemistry

“…The 1 H NMR spectra of 5 indicated characteristic aromatic protons at 7.72, 7.53, 7.03 ppm and ferrocenyl protons appeared as a singlets at 4.63, 4.33, 4.08 ppm. On the other hand, 1 H NMR measurements was precluded owing to the paramagnetic nature of cobalt phthalocyanine 6 [35]. Also, 13 C NMR spectra were good correlation with the structure of compounds 4 and 5.…”