Effect of the S-to-S bridge on the redox properties and H<sub>2</sub>activation performance of diiron complexes related to the [FeFe]-hydrogenase active site
作者:Minglun Cheng、Mei Wang、Dehua Zheng、Licheng Sun
DOI:10.1039/c6dt02953a
日期:——
the [FeFe]-hydrogenase active site, namely diiron dithiolates of [(μ-edt)Fe(CO)3}Fe(CO)(κ2-PNP)}] (1, edt = ethane-1,2-dithiolate, PNP = Ph2PCH2N(nPr)CH2PPh2), [(μ-bdtMe)Fe(CO)3}Fe(CO)(κ2-PNP)}] (2, bdtMe = 4-methylbenzene-1,2-dithiolate), and [(μ-adtBn)Fe(CO)3}Fe(CO)(κ2-PNP)}] (3, adtBn = N-benzyl-2-azapropane-1,3-dithiolate), were prepared and structurally characterized. These complexes feature
的[FEFE] -hydrogenase活性位点的三种仿生模型,[(μ-EDT)的Fe(CO)的即二铁dithiolates 3 } 的Fe(CO)(κ 2 -pnp)}](1,EDT =乙烷1,2-二硫酚,PNP =苯基2 PCH 2 N(ñ PR)CH 2 PPH 2),[(μ-bdtMe)的Fe(CO)3 } 的Fe(CO)(κ 2 -pnp)}](2,bdtMe = 4-甲基苯-1,2-二硫醇),和[(μ-adtBn)的Fe(CO)3 } 的Fe(CO)(κ 2 -pnp)}](3,adtBn = ñ-制备了苄基-2-氮杂丙烷-1,3-二硫醇酯并对其结构进行了表征。这些复合物具有相同的PNP配体,但具有不同的S-to-S桥。通过循环伏安法和原位红外光谱研究了S-to-S桥对1-3电化学性质和化学氧化反应性的影响。结果表明,S-to-S桥对1-3的氧化反应性和原位生成的单电子氧化复合物[