Abstract
The synthesis, electrochemical activity, and relative photodecomposition rate is reported for four new Mn(i) N-heterocyclic carbene complexes: [MnX(N-ethyl-N′-2-pyridylimidazol-2-ylidine)(CO)3] (X = Br, NCS, CN) and [MnCN(N-ethyl-N′-2-pyridylbenzimidazol-2-ylidine)(CO)3]. All compounds display an electrocatalytic current enhancement under CO2 at the potential of the first reduction, which ranges from -1.53 V to -1.96 V versus the saturated calomel electrode. Catalytic CO production is observed for all species during four-hour preparative-scale electrolysis, but substantial H2 is detected in compounds where X is not Br. All species eventually decompose under both 350 nm and 420 nm light, but cyanide substituted complexes (X = CN) last significantly longer (up to 5x) under 420 nm light as a result of a blue-shifted MLCT band.
Original language | English (US) |
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Pages (from-to) | 2122-2131 |
Number of pages | 10 |
Journal | Dalton Transactions |
Volume | 44 |
Issue number | 5 |
DOIs | |
State | Published - Feb 7 2015 |
All Science Journal Classification (ASJC) codes
- Inorganic Chemistry