3 documents found, page 1 of 1
Sort by
Issue Date
The 9-Anthroate chromophore as a fluorescent probe for water
Costa, Fernando Pestana da; Maçanita, António L.; Costa, Sílvia B.; Melo, Eurico C.; Santos, HelenaWater quenches the fluorescence of methyl 9-anthroate with a rate constant showing little dependence on solvent viscosity or polarity. In dioxane, at 20ºC the value of the rate constant is 9.6 X 10^6 M^(-1) s^(-1) , and the activation energy found for the process is 14.1 kJ mol^(-1). The quenching process is entropy-controlled and is likely to involve a hydrogen-bonded complex as an intermediate. Since the fluo...
Date: 1989
|
Origin: Repositório Aberto da Universidade Aberta
The 9-antroate chromophore as a fluorescence probe for water
Costa, Fernando Pestana da; Costa, Sílvia B.; Melo, Eurico C.; Prieto, Manuel; Maçanita, António L.
Date: 1986
|
Origin: Repositório Aberto da Universidade Aberta
Dependência do tempo de vida da fluorescência do 9-antroato de metilo na presen...
Costa, Fernando Pestana da; Melo, Eurico C.; Costa, Sílvia B.; Fareleira, João M. N. A.; Maçanita, António L.
Date: 1984
|
Origin: Repositório Aberto da Universidade Aberta