Synthesis and Optical Properties of Phenanthroline-Derived Schiff Base-Like Dinuclear RuII -NiII Complexes.
Chemistry
; 24(20): 5100-5111, 2018 Apr 06.
Article
em En
| MEDLINE
| ID: mdl-29143988
ABSTRACT
Two phenanthroline-derived Schiff base-like ligands with a covalently linked ruthenium(II) phosphorescent unit were synthesised and converted into bimetallic RuII -NiII complexes. The optical properties were studied to examine a possible photoluminescence quenching through a nonradiative energy-transfer upon a coordination-induced spin-state switch (CISSS) at the nickel(II) centre. Therefore, the metalloligands and the nickel(II) complexes were studied using UV/Vis absorbance, steady-state, and time-resolved emission spectroscopy in solutions of MeCN and pyridine. It is demonstrated that the nature of the bridging ligand between the ruthenium(II) donor and the nickel(II) acceptor strongly influences the photophysical behaviour upon CISSS. For the complex with a phenazine bridge, photoluminescence quenching is observed in the presence of a paramagnetic nickel(II) centre.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fenantrolinas
/
Rutênio
/
Bases de Schiff
/
Substâncias Luminescentes
/
Complexos de Coordenação
/
Níquel
Idioma:
En
Revista:
Chemistry
Assunto da revista:
QUIMICA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Alemanha