NDLI: Carbon monoxide release catalysed by electron transfer: electrochemical and spectroscopic investigations of [Re(bpy-R)(CO)4](OTf) complexes relevant to CO2 reduction.

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Carbon monoxide release catalysed by electron transfer: electrochemical and spectroscopic investigations of [Re(bpy-R)(CO)4](OTf) complexes relevant to CO2 reduction.

Content Provider	Semantic Scholar
Author	Grice, Kyle A. Gu, Nina X. Sampson, Matthew Kubiak, Clifford P.
Copyright Year	2013
Abstract	[Re(bpy-tBu)(CO)4](OTf) (bpy-tBu = 4,4'-di-tert-butyl-2,2'-bipyridine, OTf = trifluoromethanesulfonate) (1) and [Re(bpy)(CO)4](OTf) (bpy = 2,2'-bipyridine) (2) were synthesized and studied as proposed intermediates in the electrocatalytic reduction of carbon dioxide (CO2) by Re(bpy-R)(CO)3X. Both compounds demonstrated increased current responses in cyclic voltammograms under CO2. Complex 1 was also characterized by X-ray crystallography. Infrared-spectroelectrochemistry (IR-SEC) of 1 and 2 indicated that upon exposure of the cationic tetracarbonyl compounds to a reducing potential, a CO ligand is labilised and [Re(bpy-R)(CO)3(CH3CN)](+) species are formed. This is proposed to occur via an electron-transfer-catalysed process wherein a catalytic amount of reduced species propagates a ligand exchange reaction. Addition of a catalytic amount of potassium intercalated graphite (KC8), a chemical reductant, to a solution of 1 or 2 also yielded quantitative formation of [Re(bpy-R)(CO)3(CH3CN)](+), which indicates that the CO loss is catalysed by electron transfer, and not the electrode itself.
File Format	PDF HTM / HTML
DOI	10.1039/c3dt50612f
PubMed reference number	23629511
Journal	Medline
Volume Number	42
Issue Number	23
Alternate Webpage(s)	http://www.rsc.org/suppdata/dt/c3/c3dt50612f/c3dt50612f.pdf
Alternate Webpage(s)	http://pubs.rsc.org/en/content/articlepdf/2013/DT/C3DT50612F
Alternate Webpage(s)	https://doi.org/10.1039/c3dt50612f
Journal	Dalton transactions
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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