Earth-abundant metal complexes have been at- tracting increasing attention in the field of photo(redox)ca- talysis. In this work, the synthesis and full characterisation of four new heteroleptic CuI complexes are reported, which can work as photosensitizers. The complexes bear a bulky diphosphine (DPEPhos = bis[(2-diphenylphosphino)phenyl] ether) and a diimine chelating ligand based on 1-benzyl-4- (quinol-2’yl)-1,2,3-triazole. Their absorption has a relative maximum in the visible-light region, up to 450 nm. Thus, their use in photocatalytic systems for the reduction of CO2 with blue light in combination with the known catalyst [NiII(cyclam)]Cl2 was tested. This system produced CO as the main product through visible light (l = 420 nm) with a TON up to 8 after 4 hours. This value is in line with other photo- catalytic systems using the same catalyst. Nevertheless, this system is entirely noble-metal free.

New Photosensitizers Based on Heteroleptic CuI Complexes and CO2 Photocatalytic Reduction with [NiII(cyclam)]Cl2 / Claudia Bizzarri, Luisa Luci, Cecilia Bruschi, Letizia Sambri, Patrick Weis, Olaf Fuhr, Lisa-Lou Gracia. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - STAMPA. - 26:(2020), pp. 9929-9937. [10.1002/chem.202001279]

New Photosensitizers Based on Heteroleptic CuI Complexes and CO2 Photocatalytic Reduction with [NiII(cyclam)]Cl2

Letizia Sambri
Supervision
;
2020

Abstract

Earth-abundant metal complexes have been at- tracting increasing attention in the field of photo(redox)ca- talysis. In this work, the synthesis and full characterisation of four new heteroleptic CuI complexes are reported, which can work as photosensitizers. The complexes bear a bulky diphosphine (DPEPhos = bis[(2-diphenylphosphino)phenyl] ether) and a diimine chelating ligand based on 1-benzyl-4- (quinol-2’yl)-1,2,3-triazole. Their absorption has a relative maximum in the visible-light region, up to 450 nm. Thus, their use in photocatalytic systems for the reduction of CO2 with blue light in combination with the known catalyst [NiII(cyclam)]Cl2 was tested. This system produced CO as the main product through visible light (l = 420 nm) with a TON up to 8 after 4 hours. This value is in line with other photo- catalytic systems using the same catalyst. Nevertheless, this system is entirely noble-metal free.
2020
New Photosensitizers Based on Heteroleptic CuI Complexes and CO2 Photocatalytic Reduction with [NiII(cyclam)]Cl2 / Claudia Bizzarri, Luisa Luci, Cecilia Bruschi, Letizia Sambri, Patrick Weis, Olaf Fuhr, Lisa-Lou Gracia. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - STAMPA. - 26:(2020), pp. 9929-9937. [10.1002/chem.202001279]
Claudia Bizzarri, Luisa Luci, Cecilia Bruschi, Letizia Sambri, Patrick Weis, Olaf Fuhr, Lisa-Lou Gracia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/771844
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