Transferring photocatalytic CO2 reduction mediated by Cu(N^N)(P^P)+ complexes from organic solvents into ionic liquid media†
Paola A.
Forero-Cortés, 
abc
Maximilian
Marx,
a
Nikolaos G.
Moustakas,
a
Fabian
Brunner,
c
Catherine E.
Housecroft,
c
Edwin C.
Constable,
c
Henrik
Junge,
a
Matthias
Beller
a
and
Jennifer
Strunk
*a
abc
Maximilian
Marx,
a
Nikolaos G.
Moustakas,
a
Fabian
Brunner,
c
Catherine E.
Housecroft,
c
Edwin C.
Constable,
c
Henrik
Junge,
a
Matthias
Beller
a
and
Jennifer
Strunk
*a
Abstract
Photocatalytic carbon dioxide reduction utilizing metal complexes based on the earth-abundant transition metals iron and copper was transferred from organic solvents into ionic liquids with high selectivity and moderate turn-over numbers. Different classes of ionic liquids were evaluated to determinate the CO/H2 selectivity of the process. High-purity conditions were utilized to validate that CO was a result of CO2 reduction and not resulting from other carbon sources. In addition, a novel copper-based photosensitizer was synthesized and its photo- and electrochemical properties were investigated.
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