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Lookup NU author(s): Dr Joshua Karlsson, Professor Elizabeth GibsonORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Two novel supramolecular complexes RuRe ([Ru(dceb)2(bpt)Re(CO)3Cl](PF6)) and RuPt ([Ru(dceb)2(bpt)PtI(H2O)](PF6)2) (dceb = diethyl[2,2’-bipyridine]-4,4’-dicarboxylate, bpt = 3,5-di(pyridine-2-yl)-1,2,4-triazolate) were synthesized as new catalysts for photocatalytic CO2 reduction and H2 evolution, respectively. The influence of the catalytic metal for successful catalysis in solution and on a NiO semiconductor was examined. IR-active handles in the form of carbonyl groups on the peripheral ligand on the photosensitiser were used to study the excited states populated, as well as the one-electron reduced intermediate species using infrared and UV-Vis spectroelectrochemistry, and time resolved infrared spectroscopy. Inclusion of ethyl-ester moieties led to a reduction in the LUMO energies on the peripheral bipyridine ligand, resulting in localization of the 3MLCT excited state on these peripheral ligands following excitation. RuPt generated hydrogen in solution and when immobilized on NiO in a photoelectrochemical (PEC) cell. RuRe was inactive as a CO2 reduction catalyst in solution, and produced only trace amounts of CO when the photocatalyst was immobilized on NiO in a PEC cell saturated with CO2.
Author(s): Cerpentier FJR, Karlsson J, Lalrempui R, Brandon MP, Sazanovich IV, Greetham GM, Gibson EA, Pryce MT
Publication type: Article
Publication status: Published
Journal: Frontiers in Chemistry
Year: 2021
Volume: 9
Online publication date: 24/12/2021
Acceptance date: 29/11/2021
Date deposited: 10/01/2022
ISSN (electronic): 2296-2646
Publisher: Frontiers Research Foundation
URL: https://doi.org/10.3389/fchem.2021.795877
DOI: 10.3389/fchem.2021.795877
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