摘要
Two diiron dithiolate complexes [Fe2（CO）6（1,8-S2-2-CH2OOCPhC（10）H5）] 1 and[Fe2（CO）6（1,8-S2-2-CH2OOCPh-4-NO2C（10）H5）]2 were synthesized in high yield. The complexes have been confirmed by single-crystal X-ray diffraction and characterized by IR, UV-Vis, ^1H NMR spectroscopy and cyclic voltammetry. They contain a butterfly Fe2S2 core with the Fe1–Fe2 distances of 2.5237（7）A in 1 and 2.5125（12）A in 2, falling in the normal range of Fe–Fe bond length（2.49 - 2.57 A）. The cyclic voltammetry has been used to investigate the electrochemical properties and the electrocatalytic proton reduction for 1 and 2. The complexes display reduction peaks at –1.074 V, –1.535 V（1） and –0.869 V, –1.247 V（2） vs. Fc/Fc^＋, respectively. With using p-Ts OH acid of different concentration, the reduction peak of complex 2 grows non-linear; on the contrary, that of complex 1 is linear with the addition of the acid. Cyclic voltammetry revealed the two complexes are good catalysts in the CH3CN/NBu4PF6 solution.
Two diiron dithiolate complexes [Fe2（CO）6（1,8-S2-2-CH2OOCPhC（10）H5）] 1 and[Fe2（CO）6（1,8-S2-2-CH2OOCPh-4-NO2C（10）H5）]2 were synthesized in high yield. The complexes have been confirmed by single-crystal X-ray diffraction and characterized by IR, UV-Vis, ^1H NMR spectroscopy and cyclic voltammetry. They contain a butterfly Fe2S2 core with the Fe1–Fe2 distances of 2.5237（7）A in 1 and 2.5125（12）A in 2, falling in the normal range of Fe–Fe bond length（2.49 - 2.57 A）. The cyclic voltammetry has been used to investigate the electrochemical properties and the electrocatalytic proton reduction for 1 and 2. The complexes display reduction peaks at –1.074 V, –1.535 V（1） and –0.869 V, –1.247 V（2） vs. Fc/Fc^＋, respectively. With using p-Ts OH acid of different concentration, the reduction peak of complex 2 grows non-linear; on the contrary, that of complex 1 is linear with the addition of the acid. Cyclic voltammetry revealed the two complexes are good catalysts in the CH3CN/NBu4PF6 solution.
基金
supported by the National Natural Science Foundation of China(Nos.21231003 and 21203195)
