Some aspects of room-temperature phosphorescence in liquid solutions.
Experimental requirements for room-temperature phosphorescence measurements in liquids (RTPL) are discussed. Phosphorescence quantum yields and triplet lifetimes of some brominated naphthalenes and halogenated biphenyls at 77 K in 2-methyltetrahydrofuran and at room temperature in hexane are reported and compared. Surprisingly the naphthalenes show only little loss in quantum yields in going from 77 K to room temperature. Sensitized phosphorescence is discussed as a means of expanding the analytical potential of RTPL. Results with a model system of benzophenone as a donor (analyte) and 1,4-dibromonaphthalene as an acceptor are presented.
Donkerbroek
J J
JJ
Department of General and Analytical Chemistry of the Free University, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands.
Elzas
J J
JJ
Gooijer
C
C
Frei
R W
RW
Velthorst
N H
NH