Jump to main content
Jump to site search

Issue 8, 2012
Previous Article Next Article

Electron transfer and hydrogen generation from a molecular dyad: platinum(II) alkynyl complex anchored to [FeFe] hydrogenase subsite mimic

Author affiliations

Abstract

A PS–Fe2S2 molecular dyad 1a directly anchoring a platinum(II) alkynyl complex to a Fe2S2 active site of a [FeFe] H2ase mimic, and an intermolecular system of its reference complexes 1b and 2, have been successfully constructed. Time-dependence of H2 evolution shows that PS–Fe2S21a as well as complex 2 with 1b can produce H2 in the presence of a proton source and sacrificial donor under visible light irradiation. Spectroscopic and electrochemical studies on the electron transfer event reveal that the reduced FeIFe0 species generated by the first electron transfer from the excited platinum(II) complex to the Fe2S2 active site in PS–Fe2S21a and complex 2 with 1b is essential for photochemical H2 evolution, while the second electron transfer from the excited platinum(II) complex to the protonated FeIFe0 species is thermodynamically unfeasible, which might be an obstacle for the relatively small amount of H2 obtained by PS–Fe2S2 molecular dyads reported so far.

Graphical abstract: Electron transfer and hydrogen generation from a molecular dyad: platinum(ii) alkynyl complex anchored to [FeFe] hydrogenase subsite mimic

Back to tab navigation

Publication details

The article was received on 12 Oct 2011, accepted on 11 Nov 2011 and first published on 04 Jan 2012


Article type: Paper
DOI: 10.1039/C1DT11923K
Citation: Dalton Trans., 2012,41, 2420-2426
  •   Request permissions

    Electron transfer and hydrogen generation from a molecular dyad: platinum(II) alkynyl complex anchored to [FeFe] hydrogenase subsite mimic

    W. Wang, F. Wang, H. Wang, C. Tung and L. Wu, Dalton Trans., 2012, 41, 2420
    DOI: 10.1039/C1DT11923K

Search articles by author

Spotlight

Advertisements