Jump to main content
Jump to site search

Issue 38, 2012
Previous Article Next Article

Photoswitchable electrochemical behaviour of a [FeFe] hydrogenase model with a dithienylethene derivative

Author affiliations

Abstract

A diiron dithiolate complex 1o with a dithienylethene (DTE) phosphine ligand has been elaborately designed and fully investigated by spectroscopic and DFT computational studies. Upon irradiation with UV light, the DTE moiety in complex 1o undergoes an excellent photocyclization reaction to attain ring-closed state 1c in high yield (>95%), accompanied by a colour change from orange to deep blue. On the other hand, upon irradiation with visible light (>460 nm), ring-closed form 1c in CH3CN solution reverts perfectly into ring-open form 1o. Both 1o and 1c were characterised by IR, 1H, 31P, 19F NMR and electrochemical spectroscopy. The electrochemical behaviours of both the open and closed forms were investigated by cyclic voltammetry. Upon photocyclization reaction, a 290 mV (from −2.29 V to −2.00 V) positive shift is induced in the potential of electrochemical catalytic proton reduction, due to the electron-withdrawing effect of the ring-closed DTE moiety. Consequently, complex 1 can reversibly photoswitch the potential of proton reduction on the [FeFe] moiety.

Graphical abstract: Photoswitchable electrochemical behaviour of a [FeFe] hydrogenase model with a dithienylethene derivative

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 09 Jul 2012, accepted on 02 Aug 2012 and first published on 03 Aug 2012


Article type: Paper
DOI: 10.1039/C2DT31507F
Citation: Dalton Trans., 2012,41, 11813-11819
  •   Request permissions

    Photoswitchable electrochemical behaviour of a [FeFe] hydrogenase model with a dithienylethene derivative

    H. Wen, J. Wang, M. Hu, B. Li, Z. Chen and C. Chen, Dalton Trans., 2012, 41, 11813
    DOI: 10.1039/C2DT31507F

Search articles by author