Synthesis and Electron-Transfer Processes in a New Family of Ligands for Coupled Ru-Mn-2 Complexes
Artikel i vetenskaplig tidskrift, 2014

A series of [Ru(bpy)(3)](2+)-type (bpy= 2,2'-bipyridine) photosensitisers have been coupled to a ligand for Mn, which is expected to give a dinuclear complex that is active as a water oxidation catalyst. Unexpectedly, photophysical studies showed that the assemblies had very short lived excited states and that the decay patterns were complex and strongly dependent on pH. One dyad was prepared that was capable of catalysing chemical water oxidation by using [Ru(bpy)(3)](3+) as an oxidant. However, photochemical water oxidation in the presence of an external electron acceptor failed, presumably because the short excited-state lifetime precluded initial electron transfer to the added acceptor. The photophysical behaviour could be explained by the presence of an intricate excited-state manifold, as also suggested by time-dependent DFT calculations.

photophysics

manganese

electron transfer

quantum chemistry

water splitting

Författare

E. A. Karlsson

Stockholms universitet

B. L. Lee

Stockholms universitet

R. Z. Liao

Stockholms universitet

T. Akermark

Stockholms universitet

M. D. Karkas

Stockholms universitet

Valeria Saavedra

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

P. E. M. Siegbahn

Stockholms universitet

X. D. Zou

Stockholms universitet

Maria Abrahamsson

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

B. Akermark

Stockholms universitet

ChemPlusChem

2192-6506 (ISSN)

Vol. 79 7 936-950

Styrkeområden

Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)

Energi

Materialvetenskap

Ämneskategorier

Fysikalisk kemi

DOI

10.1002/cplu.201402006

Mer information

Senast uppdaterat

2021-11-12