M. Daneri, C. Abelt
Sep 1, 2015
Citations
0
Influential Citations
9
Citations
Journal
Journal of Photochemistry and Photobiology A-chemistry
Abstract
Abstract The fluorescence behavior of 3-(dimethylamino)-8,9,10,11-tetrahydro-7H-cyclohepta[ α ]naphthalen-7-one and 1-(6-(dimethylamino) naphthalen-2-yl)-2,2-dimethylpropan-1-one, both carbonyl-twisted derivatives of PRODAN, in binary mixtures of toluene and an alkanol (methanol, ethanol isopropanol) is fit to a three-step preferential solvation model. The photophysical parameters extracted from the model include the solvatochromic shifts resulting from a single H-bond and the quenching that is due to changes in polarity only. The results confirm that quenching involves two H-bonds. They also show that the H-bond-induced quenching shows an energy-gap dependence.