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Issue 11, 2014
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A photo- and electrochemical investigation of BODIPY–cobaloxime complexes for hydrogen production, coupled with quantum chemical calculations

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Abstract

Two BODIPY–cobaloxime complexes; [{Co(dmgH)2Cl}{3-[bis-(4-ethyl-3,5-dimethyl-1H-pyrrol-2-yl)-methyl]-pyridine-borondiflouride}] (1a) and [{Co(dmgH)2Cl}{4-[bis-(4-ethyl-3,5-dimethyl-1H-pyrrol-2-yl)-methyl]-pyridine-borondiflouride}] (2a) (BODIPY = boron dipyrromethene), (dmgH = dimethylglyoxime) have been synthesised and studied as model catalytic systems for the generation of hydrogen gas in aqueous media. Under photochemical conditions, neither complex catalysed the reduction of water to hydrogen. However, both complexes showed considerable activity under electrochemical conditions. Turn-over-numbers for hydrogen production of 1.65 × 104 and 1.08 × 104 were obtained for 1a and 2a respectively following potentiostatic electrolysis at −1.2 V vs. Ag/AgCl after 1 hour. Quantum chemical calculations were performed to provide an explanation for the lack of photochemical activity.

Graphical abstract: A photo- and electrochemical investigation of BODIPY–cobaloxime complexes for hydrogen production, coupled with quantum chemical calculations

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Publication details

The article was received on 19 Dec 2013, accepted on 27 Jan 2014 and first published on 03 Feb 2014


Article type: Paper
DOI: 10.1039/C3CP55347G
Phys. Chem. Chem. Phys., 2014,16, 5229-5236

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    A photo- and electrochemical investigation of BODIPY–cobaloxime complexes for hydrogen production, coupled with quantum chemical calculations

    J. C. Manton, C. Long, J. G. Vos and M. T. Pryce, Phys. Chem. Chem. Phys., 2014, 16, 5229
    DOI: 10.1039/C3CP55347G

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