Synthesis, Thermal Stability and Electrocatalytic Activities of meso-tetrakis (5-bromothiophen-2-yl) Porphyrin and Its Cobalt and Copper Complexes

摘要

Linearly pi-extended thienyl porphyrin namely 5,10,15,20 tetrakis (5-bromothiophen-2-yl) porphyrin,and its cobalt and copper complexes were synthesized in good and quantitative yields respectively. Thechemical structure of the synthesized porphyrins was confirmed by spectroscopic techniques (FT-IR,NMR, MS, and UV-Vis). Additionally, the thermal gravimetric analysis (TGA) was measured toinvestigate the high-temperature stability of the porphyrins. Subsequently, the porphyrins were used aselectrocatalysts for the oxygen evolution reaction (OER) in 1 M KOH. The cobalt-porphyrin complexshowed the best performance in term of a low band gap value and a high catalytic activity with goodstability towards the OER.