Synthesis, characterization and electrochemical investigation of a new inorganic-organic hybrid compound constructed by Keggin-type polyoxometalate and cyanoguanidine

摘要

An inorganic—organic hybrid complex [HDCD]_3[PW_(12)O_(40)]?3H_2O (1) (DCD = 2-cyanoguanidine) has been synthesized from the reaction of Keggin polyanion and cyanoguanidine (C_2N_4H_4) under mild condition, and characterized by using elemental analysis, infrared spectrum, thermogravimatric analysis and single crystal X-ray diffraction. X-ray crystallography reveals that 1 displays an inorganic—organic hybrid frameworks constructed by [PW_(12)O_(40)]~(3-) Keggin-type polyoxoanion and three {(HDCD)}~+ monocationic hydrogen-bonded units. The electrochemical behavior and electrocatalysis of 1 have been studied in detail.