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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Synthesis, characterization, photophysical and electrochemical properties of fac-tricarbonyl(4,7-dichloro-1,10-phenanthroline)rhenium(I) complexes

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Author(s):
Goncalves, Marcia R. [1] ; Frin, Karina P. M. [1]
Total Authors: 2
Affiliation:
[1] Fed Univ ABC UFABC, BR-09210170 Santo Andre, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Polyhedron; v. 97, p. 112-117, SEP 5 2015.
Web of Science Citations: 18
Abstract

The fac-{[}Re(CO)(3)Cl(Cl(2)phen)] and fac-{[}Re(CO)(3)(py)(Cl(2)phen)]PF6 complexes were synthesized, purified and characterized by H-1 NMR, UV-Vis and IR spectroscopies and both photophysical and electrochemical behaviors were investigated. The electronic absorption spectra exhibit two main absorption bands: the higher energy band, which was assigned to IL, and the lower energy band, assigned to MLCT. The fac-{[}ReCl(Cl(2)phen)(CO)(3)] and fac-{[}Re(py)(Cl(2)phen)(CO)(3)]PF6 complexes showed emission at room temperature in both CH3CN solution (lambda(max) = 640 nm, phi = 0.0027; lambda(max) = 590 nm, phi = 0.055) and rigid media (lambda(max) = 590 nm, lambda(max) = 535 nm in PMMA) arising from the lowest lying metal to ligand charge transfer ((MLCTRe -> Cl2phen)-M-3) excited state. Additionally, the PVK emission band is almost completely quenched in the presence of 4% rhenium(I) complex. Both compounds showed metal-centered oxidation, Re(I) -> (II), and ligand-based reduction, Cl(2)phen -> Cl(2)phen({*}-), in CH2Cl2 solution. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of both complexes were estimated. The electrochemical and emission properties indicate a potential application of the rhenium(I) compounds in OLED devices. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 11/23408-0 - Syntheses, characterization and photophysical investigation of rhenium (I) complexes
Grantee:Karina Passalacqua Morelli Frin
Support type: Regular Research Grants