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- W2884727076 abstract "Anthracene-bridged dinuclear rhenium complexes are reported for electrocatalytic carbon dioxide (CO2) reduction to carbon monoxide (CO). Related by hindered rotation of each rhenium active site to either side of the anthracene bridge, cis and trans conformers have been isolated and characterized. Electrochemical studies reveal distinct mechanisms, whereby the cis conformer operates via cooperative bimetallic CO2 activation and conversion and the trans conformer reduces CO2 through well-established single-site and bimolecular pathways analogous to Re(bpy)(CO)3Cl. Higher turnover frequencies are observed for the cis conformer (35.3 s-1) relative to the trans conformer (22.9 s-1), with both outperforming Re(bpy)(CO)3Cl (11.1 s-1). Notably, at low applied potentials, the cis conformer does not catalyze the reductive disproportionation of CO2 to CO and CO32- in contrast to the trans conformer and mononuclear catalyst, demonstrating that the orientation of active sites and structure of the dinuclear cis complex dictate an alternative catalytic pathway. Further, UV-vis spectroelectrochemical experiments demonstrate that the anthracene bridge prevents intramolecular formation of a deactivated Re-Re-bonded dimer. Indeed, the cis conformer also avoids intermolecular Re-Re bond formation." @default.
- W2884727076 created "2018-08-03" @default.
- W2884727076 creator A5006977428 @default.
- W2884727076 creator A5029542091 @default.
- W2884727076 creator A5030280190 @default.
- W2884727076 creator A5061299716 @default.
- W2884727076 creator A5064197479 @default.
- W2884727076 creator A5080599756 @default.
- W2884727076 date "2018-07-24" @default.
- W2884727076 modified "2023-10-12" @default.
- W2884727076 title "Electrocatalytic CO<sub>2</sub> Reduction with <i>Cis</i> and <i>Trans</i> Conformers of a Rigid Dinuclear Rhenium Complex: Comparing the Monometallic and Cooperative Bimetallic Pathways" @default.
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