Tracking Charge Accumulation in a Functional Triazole?Linked Ruthenium?Rhenium Dyad Towards Photocatalytic Carbon Dioxide Reduction

نویسندگان

چکیده

The [Re(bpy)(CO)3Cl] catalyst pioneered by Lehn for the two-electron reduction of CO2 has constantly revealed unique facets in mechanistic understanding selective transformation CO2. A novel triazole-linked ruthenium photosensitizer and a rhenium dyad was synthesized investigated photo-induced charge accumulation using time-resolved absorption spectroscopy. triazole bridging ligand promoted weak electronic communication between two units, resulting an anodic shift potentials Re moiety. Upon excitation photosensitizer, first occurred with fast apparent rate >5×107 s?1. Using double-excitation nanosecond pump-pump-probe setup to track second electron on catalytic unit not conclusive as no observable changes upon excitation, suggesting pathway efficient intramolecular reverse transfer preventing at under our experimental conditions. Nevertheless, continuous irradiation use sacrificial donors, photocatalytic assays showed good turnover numbers, hinting non-innocent role byproducts solution.

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ژورنال

عنوان ژورنال: ChemPhotoChem

سال: 2021

ISSN: ['2367-0932']

DOI: https://doi.org/10.1002/cptc.202100010