Indirect consequences of exciplex states on the phosphorescence lifetime of phenazine-based 1,2,3-triazole luminescent probes.
The optical properties of phenazine derivative probe solutions involving intersystem crossing from singlet to triplet states were investigated by time resolved spectroscopy. The room temperature phosphorescence emission presented different time responses when Cd2+ions were bound to the probe chemical structure. The complex exciplex formation observed to occur in this case was not directly responsible for the change in the phosphorescence lifetime. This was more influenced by the new molecular conformation and modified spin-orbit coupling imposed by the binding of the Cd2+ions to the phenazine molecules.
Instituto de Ciências Exatas, Departamento de Física, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil. cury@fisica.ufmg.br.
Bárbara B A
BB
Costa
Instituto de Ciências Exatas, Departamento de Química, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil.
Guilherme A M
GA
Jardim
Department of Physics, University of Durham, South Road DH1 3LE, Durham, UK.
Paloma L
PL
Santos
Instituto de Ciências Exatas, Departamento de Química, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil.
Hállen D R
HD
Calado
Department of Physics, University of Durham, South Road DH1 3LE, Durham, UK.
Andrew P
AP
Monkman
Department of Physics, University of Durham, South Road DH1 3LE, Durham, UK.
Fernando B
FB
Dias
Instituto de Ciências Exatas, Departamento de Química, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil.
Eufrânio N
EN
da Silva Júnior
Instituto de Ciências Exatas, Departamento de Física, Universidade Federal de Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, Brazil. cury@fisica.ufmg.br.
Luiz A
LA
Cury