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Paired Electrosynthesis at Interdigitated Microband Array Electrodes without Intentionally Added Electrolyte: C-C
Tingran Liu1, Claire McMullin1, James E Taylor1
1Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K.
Abstract:
The formation of substituted benzyl alcohols from dicyanobenzenes and methanol (C-C coupling) is demonstrated as a model system for paired electrosynthesis and investigated at interdigitated microband array electrodes in a microreactor with/without intentionally added supporting electrolyte. A Pt-Pt microband array with 5 μm bands separated by 5 μm gaps is employed in a dimethyl sulfoxide (DMSO) solvent. Yields are optimized to approximately 50% at the point of 100% conversion. The mechanism is investigated by employing isotope labeling (CD3OD, CH3OD, d 6-DMSO, 13CH3OH). The methylene group (12C or 13C) is obtained with H2, D2, and DH substitution patterns, and a hypothesis for a corresponding mechanism is discussed aided with density functional theory (DFT) calculations. Implications for sustainable electrosynthesis at paired microband electrodes are discussed.
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