Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Photophysical properties of rhenium(I) complexes and photosensitized generation of singlet oxygen

Texto completo
Autor(es):
Ramos, Luiz Duarte ; da Cruz, Hugo Moreira ; Frin, Karina P. Morelli
Número total de Autores: 3
Tipo de documento: Artigo Científico
Fonte: PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES; v. 16, n. 4, p. 459-466, APR 1 2017.
Citações Web of Science: 13
Resumo

fac-{[}Re(ampy)(CO)(3)(NN)](+) complexes (ampy = 2-aminomethylpyridine and NN = 1,10-phenanthroline (phen), and 2,2'-bipyridine (bpy)) were synthesized, purified and characterized by proton nuclear magnetic resonance (H-1 NMR), UV-visible and Fourier-transformed infrared (FT-IR) spectroscopies, and their photophysical properties were investigated using steady state and time-resolved emission spectroscopies. The electronic absorption spectra exhibit two main absorption bands: the higher energy band, which was assigned to intraligand transition (IL), and the lower energy band assigned to metal-to-ligand charge transfer (MLCT). Both complexes showed emission at room temperature in a CH3CN solution (lambda(max) = 560 nm, phi = 0.091, tau = 560 ns for fac-{[}Re(ampy)(CO)(3)(phen)](+); lambda(max) = 568 nm, phi = 0.024, tau = 100 ns for fac-{[}Re(ampy)(CO)(3)(bpy)](+)) and rigid media (lambda(max) = 530 nm, tau = 3300 ns for fac-{[}Re(ampy)(CO)(3)(phen)](+); lambda(max) = 530 nm, tau = 853 ns for fac-{[}Re(ampy)(CO)(3)(bpy)](+)) arising from the lowest lying (MLCTRe)-M-3 (>NN) excited state. Both complexes along with fac-{[}Re(L)(CO)(3)(NN)](+/0) complexes, L = Cl or pyridine, were capable of efficiently photosensitizing the generation of singlet oxygen with quantum yield in the range of 0.59-0.28. These results highlight the potential application of fac-{[}Re(L)(CO) 3(NN)](+/0) complexes in the development of sensitizers for the generation of singlet oxygen. (AU)

Processo FAPESP: 15/13149-8 - Complexos polipiridínicos de rênio(I): síntese, investigação das propriedades fotofísicas e aplicação como sondas luminescentes e/ou agentes terapêuticos
Beneficiário:Karina Passalacqua Morelli Frin
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 11/23408-0 - Síntese, caracterização e investigação das propriedades fotofísicas de complexos de rênio (I)
Beneficiário:Karina Passalacqua Morelli Frin
Linha de fomento: Auxílio à Pesquisa - Regular