INVESTIGADORES
FAGALDE Florencia
artículos
Título:
Synthesis, UV-visible spectroelectrochemistry and theoretical characterization of new polypyridyl Ru(II) complexes containing 2, 4, 6 -tris(2-pyridyl)-1, 3, 5- triazine as precursors for water oxidation catalysts
Autor/es:
DOMÍNGUEZ, SOFIA EUGENIA; MORAN-VIEYRA, F EDUARDO; FAGALDE, FLORENCIA
Revista:
DALTON TRANSACTIONS
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Lugar: CAMBRIDGE; Año: 2020 vol. 49 p. 12741 - 12755
ISSN:
1477-9226
Resumen:
In this work, we report the syntheses and physicochemical characterization of new chloro and aqua complexes of Ru (II) with2,4,6-tris(2-pyridyl)-1,3,5-triazine (tptz) and 2,2?-bipyridines substituted with donor and acceptor groups in the 4,4´-positions. The aqua complexes behave as precursors for water oxidation catalysts at pH = 1 using Ce(IV) as sacrificial oxidant.Besides, the oxidized forms Ru(IV) and Ru(V) have been characterized at different pH values by electrochemistry, UV-Visiblespectroscopy and spectroelectrochemistry. The reaction mechanisms were studied by combining mixing and stopped-flowexperiments with spectrophotometric monitoring in the UV-visible region and all the rate constants were determinedtogether with the corresponding TON and TOF values at pH = 1. Calculations based on Density Functional Theory (DFT andTD-DFT) were performed to support the experimental data.