Photoisomerization of di-nuclear rhenium(I) bpe-based compounds

Autor(es)

Morelli Frin, Karina P. ^[1] ; da Rocha, Denis C. ^[1] ; Mamud, Julia F. ^[1] ; Polo, Andre S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Abc, Av Dos Estados 5001, BR-09210170 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES; v. 17, n. 10, p. 1443-1449, OCT 1 2018.
• Citações Web of Science: 0

Resumo

Di-nuclear {[}[(NN)(CO)(3)Re](2)(trans-bpe)](PF6)(2) complexes, NN = 4,7-diphenyl-1,10-phenanthroline (ph(2)phen) or 4,7-dichloro-1,10-phenanthroline (Cl(2)phen) and trans-bpe = trans-1,2-bis(4-pyridyl)ethylene, were synthesized and characterized by H-1 NMR and UV-visible spectroscopy. Irradiation of acetonitrile solutions led to H-1 NMR and UV-visible spectral changes ascribed to trans-to-cis photoisomerization processes showing that the presence of another Re(i)-moiety does not preclude the photoisomerization process. Quantum yields for the di-nuclear isomerization of {[}[(ph(2)phen)(CO)(3)Re](2)(trans-bpe)](2+) were higher than those for the corresponding mono-nuclear compound process. Additionally, the higher quantum yield obtained with 254 nm irradiation for {[}[(Cl(2)phen)(CO)(3)Re](2)(trans-bpe)](2+) showed, for the first time, that the singlet pathway could also be accessed in addition to the usually observed triplet one. The luminescence in fluid solution observed for the {[}[(NN)(CO)(3)Re](2)(cis-bpe)](2+) complexes is able to efficiently photosensitize the generation of singlet O-2. (AU)

• Processo FAPESP: 17/18063-0 - Avaliação de compostos luminescentes de Re(I) em bioimagem e/ou como agentes antitumorais
• Beneficiário: Karina Passalacqua Morelli Frin
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/07289-7 - Uso de compostos polipiridínicos de Re(I) na fotorredução de CO2
• Beneficiário: Júlia Frata Mamud
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 16/21993-6 - Avaliação de compostos polipiridínicos de Ru(II) e Re(I) em dispositivos fotoativos
• Beneficiário: André Sarto Polo
• Modalidade de apoio: Auxílio à Pesquisa - Regular