High turnover photocatalytic hydrogen formation with an Fe (iii) N-heterocyclic carbene photosensitiser
Chemical Communications, 2022•pubs.rsc.org
Herein we report the first high turnover photocatalytic hydrogen formation reaction based on
an earth-abundant FeIII-NHC photosensitiser. The reaction occurs via reductive quenching
of the 2LMCT excited state that can be directly excited with green light and employs either Pt-
colloids or [Co (dmgH) 2pyCl] as proton reduction catalysts and [HNEt3][BF4] and
triethanolamine/triethylamine as proton and electron donors. The outstanding photostability
of the FeIII-NHC complex enables turnover numbers> 1000 without degradation.
an earth-abundant FeIII-NHC photosensitiser. The reaction occurs via reductive quenching
of the 2LMCT excited state that can be directly excited with green light and employs either Pt-
colloids or [Co (dmgH) 2pyCl] as proton reduction catalysts and [HNEt3][BF4] and
triethanolamine/triethylamine as proton and electron donors. The outstanding photostability
of the FeIII-NHC complex enables turnover numbers> 1000 without degradation.
Herein we report the first high turnover photocatalytic hydrogen formation reaction based on an earth-abundant FeIII-NHC photosensitiser. The reaction occurs via reductive quenching of the 2LMCT excited state that can be directly excited with green light and employs either Pt-colloids or [Co(dmgH)2pyCl] as proton reduction catalysts and [HNEt3][BF4] and triethanolamine/triethylamine as proton and electron donors. The outstanding photostability of the FeIII-NHC complex enables turnover numbers >1000 without degradation.
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