Cysteine residue-bridged dinuclear Ni–Fe complexes related to [NiFe]-H₂ases

Abstract

Cysteine residue-containing [NiFe]-H2ase models 1–6 have been prepared for the first time and some of them were found to be catalysts for H2 production from HOAc under CV conditions.

Functionalized nickel(ii)–iron(ii) dithiolates as biomimetic models of [NiFe]-H2ases

“…This is because (i) the final Q value for its first reduction event determined by controlled-potential electrolysis (CPE) is close to half that of the known two-electron reduction process of the dimer [CpFe(CO) 2 ] 2 (see Fig. S14 in the ESI†) 42 and (ii) the second reduction peak current height or its oxidation peak current height is close to the first reduction peak current height. According to the previously reported similar cases, 40,43 the two reduction processes displayed by [ 2 ]PF 6 could be assigned to the Ni II Fe II /Ni I Fe II couple and Ni I Fe II /Ni I Fe I couple, whereas the oxidation process might be attributed to the Ni II Fe II /Ni III Fe II couple.…”