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Positive effect of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) on homogeneous photocatalytic reduction of CO₂

Author:
Pschenitza, Markus, Meister, Simon, Rieger, Bernhard
Source:
Chemical communications 2018 v.54 no.27 pp. 3323-3326
ISSN:
1364-548X
Subject:
amines, carbon dioxide, chemical reduction, photocatalysis
Abstract:
A significant decrease in the amount of the sacrificial electron donor triethanolamine (TEOA) required for the homogeneous photocatalytic reduction of CO₂ using rhenium-based catalytic systems can be achieved by adding small quantities of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) to the reaction mixture. The turnover numbers (TONs) and frequencies (TOFs) measured for the reactions described herein are even higher than those observed in reaction mixtures containing high concentrations of TEOA. Furthermore, replacing TEOA with DBU in the solutions of Re(i)/Ru(ii) mixed catalytic systems leads to a doubling of the values of TON and TOF.
Agid:
6174253