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Photochemical and photophysical investigation of ruthenium(II) tris-heteroleptic compounds


Ruthenium(II) polypyridyl compounds have wide and intense absorption on the visible region of the spectrum, which favors the light harvesting and due to this have been widely employed for solar energy conversion processes. These metallic complexes can be designed in such way to execute useful functions. For instance, the photoinduced electron transfer to semiconductor conducting band, which is the first step for solar light conversion into electricity or in higher energy content substances. A series of these compounds that have been gaining attention is the ruthenium(II) tris-heteroleptic compounds, since these compounds allow the evaluation of modification on one of their ligand reflects on their properties. This proposal aims to synthesize and characterize some ruthenium(II) tris-heteroleptic compounds like cis-[Ru(GA-bpy)(R2-phen)(X)2]; GA = anchoring groups, such as carboxilic acid, R = electron donnors or acceptor substituents and X = Cl- or NCS-, as well as conduct investigation on photochemistry, photophysics and electrochemistry, in order to rationalize the effect of the substituent of the 1,10-phenanthroline on these properties. By this way it will be possible to understand the behavior of the species prepared and modulate their properties aiming a better efficiency on their function on the process of light into electrical or chemical conversion. By this way it is possible to joint academic science to the preparation of devices that can be a commercial product in longer timescale. (AU)

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(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CARVALHO, F.; LIANDRA-SALVADOR, E.; BETTANIN, F.; SOUZA, J. S.; HOMEM-DE-MELLO, P.; POLO, A. S.. Synthesis, characterization and photoelectrochemical performance of a tris-heteroleptic ruthenium(II) complex having 4,7-dimethyl-1, 10-phenanthroline. Inorganica Chimica Acta, v. 414, p. 145-152, . (11/11717-8)

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