2026-08-25T14:46:06Zhttps://gredos.usal.es/oai/request

oai:gredos.usal.es:10366/1451962025-04-30T20:36:05Zcom_10366_133237com_10366_4512com_10366_3823col_10366_133238

Garrido-Barros, Pablo Gimbert-Suriñach, Carolina Moonshiram, Dooshaye Picón, Antonio Monge, Pere Batista, Victor S. Llobet, Antoni 2021-02-09T09:46:15Z 2021-02-09T09:46:15Z 2017 Garrido Barrios, P.; Gimbert Suriñach, C. [et al.] (2017). Electronic π-Delocalization Boosts Catalytic Water Oxidation by Cu(II) Molecular Catalysts Heterogenized on Graphene Sheets. Journal of the American Chemical Society, 139(37), pp. 12907-12910. doi:10.1021/jacs.7b06828 0002-7863 http://hdl.handle.net/10366/145196 10.1021/jacs.7b06828 1520-5126 [EN] A molecular water oxidation catalyst based on the copper complex of general formula [(Lpy)CuII]2−, 22−, (Lpy is 4-pyrenyl-1,2-phenylenebis(oxamidate) ligand) has been rationally designed and prepared to support a more extended π-conjugation through its structure in contrast with its homologue, the [(L)CuII]2− water oxidation catalyst, 12− (L is o-phenylenebis(oxamidate)).The catalytic performance of both catalysts has been comparatively studied in homogeneous phase and in heterogeneous phase by π-stacking anchorage to graphenebased electrodes. In the homogeneous system, the electronic perturbation provided by the pyrene functionality translates into a 150 mV lower overpotential for 22− with respect to 12− and an impressive increase in the kcat from 6 to 128 s−1. Upon anchorage, π-stacking interactions with the graphene sheets provide further π-delocalization that improves the catalytic performance of both catalysts.In this sense, 22− turned out to be the most active catalyst due to the double influence of both the pyrene and the graphene, displaying an overpotential of 538 mV, a kcat of 540 s−1 and producing more than 5300 TONs. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional Molecular catalysts Electronic π‑Delocalization Catalytic water oxidation Electronic π-Delocalization Boosts Catalytic Water Oxidation by Cu(II) Molecular Catalysts Heterogenized on Graphene Sheets info:eu-repo/semantics/article