ISSN:
1573-4994
Schlagwort(e):
Cr–cyclam
;
luminescence spectra
;
luminescence lifetime
;
self-quenching
;
Stern–Volmer constants
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract The luminescence lifetime (τlum) and the luminescence spectra of the title complex (I) were determined in eight solvents. We found that in spite of former assumptions, the τlum of I depends on the concentration of the complex. We determined the self-quenching (k Q) and Stern–Volmer (K SV) constants, and the relative values of luminescence quantum yields in eight solvents. There was no measurable self-quenching in 1,2-ethanediol and N,N-dimethylformamide; dynamic self-quenching was found (the concentration dependence of τlum and φlum was the same) in N,N-dimethylacetamide, dimethylsulfoxide, water, propylene–carbonate, and pyridine. In acetonitrile we found both dynamic and static self-quenching based on the different concentration dependence of τlum and φlum of I; K SV and the association constant of I in acetonitrile were computed
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1020575421590
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