Synthesis, characterization and photoelectrochemical performance of a tris-heteroleptic ruthenium(II) complex having 4,7-dimethyl-1, 10-phenanthroline

Author(s)

Carvalho, F. ^[1] ; Liandra-Salvador, E. ^[1] ; Bettanin, F. ^[1] ; Souza, J. S. ^[1] ; Homem-de-Mello, P. ^[1] ; Polo, A. S. ^[1]

Affiliation

^[1] Fed Univ ABC, BR-09210580 Santo Andre - Brazil

• Document type: Journal article
• Source: Inorganica Chimica Acta; v. 414, p. 145-152, APR 1 2014.
• Web of Science Citations: 7

Abstract

The novel cis-{[}Ru(Me-2-phen)(dcbH(2))(NCS)(2)] complex was prepared using a one-pot route and characterized based on H-1 NMR, FTIR, absorption and emission spectra. The properties of this complex were compared with those of cis-{[}Ru(R-2-phen)(dcbH(2))(NCS)(2)], where R = Ph or H, to establish a relationship between the donor/acceptor character of the R substituent and the observed behavior of these compounds. Computational methods were also employed to gain a comprehensive understanding of this relationship. By using electron-donating/accepting substituents, it was possible to tune both the ground and excited states of the cis-{[}Ru(R-2-phen)(dcbH(2))(NCS)(2)] complexes. This compound is capable of sensitizing the TiO2 surface and efficiently converting the sunlight into electricity. In comparison to cis{[}Ru(Ph-2-phen)(dcbH(2))(NCS)(2)] it is observed that the presence of phenyl groups provide higher efficiency. The conversion efficiency was improved in comparison to cis-{[}Ru(phen)(dcbH(2))(NCS)(2)]. This increase in efficiency is attributed to an increase in electron density, thus favoring electron transfer to TiO2. (C) 2014 Elsevier B. V. All rights reserved. (AU)

• FAPESP's process: 11/11717-8 - Photochemical and photophysical investigation of ruthenium(II) tris-heteroleptic compounds
• Grantee: André Sarto Polo
• Support Opportunities: Regular Research Grants