Abstract
As a further exploration of the desirable diiron subsite models of [FeFe]-hydrogenases for hydrogen (H2) evolution, the asymmetrically PNP-chelate diiron ethanedithiolate complexes Fe2(μ-edt)(CO)4{κ2-(Ph2P)2NR} (1–3) can be synthesized in good yields through the substitution reactions of diiron all-carbonyl complexes Fe2(μ-edt)(CO)6 (A, edt = SCH2CH2S) with different PNP ligands (PNP = (Ph2P)2NR, R = (CH2)2CHMe2, (CH2)3OMe, (CH2)3SMe) in the presence of Me3NO·2H2O as decarbonylating agent. These new complexes 1–3 have been fully characterized by elemental analysis, FT-IR, NMR spectroscopy, and particularly for 1 by X-ray crystallography. Further, the electrochemical and electrocatalytic properties of complexes 1–3 and their precursor A as a reference compound are studied and compared through cyclic voltammetry (CV) in the absence and presence of HOAc as a proton source, suggesting that they are all found to be electrochemically active but show the distinct electrocatalytic abilities for proton reduction to H2.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
