| Full text | |
| Author(s): |
Ramos, Luiz Duarte
;
da Cruz, Hugo Moreira
;
Frin, Karina P. Morelli
Total Authors: 3
|
| Document type: | Journal article |
| Source: | PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES; v. 16, n. 4, p. 459-466, APR 1 2017. |
| Web of Science Citations: | 13 |
| Abstract | |
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) | |
| FAPESP's process: | 15/13149-8 - Polypyridynic rhenium(I) complexes: syntheses, investigation of photophysical properties and application as luminescent probes and/or therapeutic agents |
| Grantee: | Karina Passalacqua Morelli Frin |
| Support type: | Regular Research Grants |
| 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 |