Electronic Energy Transduction from {Ru(py) 4 } Chromophores to Cr(III) Luminophores

ALBORES, P.; GULDI, DIRK M.; OVIEDO, PAOLA S.; GULDI, DIRK M.; OVIEDO, PAOLA S.; BARALDO VICTORICA, LUIS MARIO; CADRANEL, ALEJANDRO; BARALDO VICTORICA, LUIS MARIO; CADRANEL, ALEJANDRO; ALBORES, P.

INORGANIC CHEMISTRY

AMER CHEMICAL SOC

Lugar: Washington; Año: 2018 vol. 57 p. 3042 - 3053

0020-1669

We report for the first time on the {Ru(py)4} photosensitization in novel trimetallic donor−acceptor complexes trans-[Ru(L)4{(μ-NC)Cr(CN)5}2]4− (where L = pyridine, 4-methoxypyridine or 4-dimethylaminopyridine). Emission from chromium-centered dd states is observed upon illuminating into either the MLCT or MM′CT absorptions of {Ru(L)4}. The underlying energy transfer is as fast as 600 fs and with quantum efficiencies ranging from 10% to 100%. These results document that {Ru(py)4} sensitizer fragments are as efficient as {Ru(bpy)2} in short-range energy transfer scenarios.