C. D. Geddes, K. Apperson, J. Karolin
Mar 1, 2001
Citations
0
Influential Citations
18
Citations
Journal
Dyes and Pigments
Abstract
Abstract Three fluorescent probes have been produced by the quaternisation of 6-methylquinoline with methyl bromide, methyl iodide and 3-bromo-1-propanol. The probes are water-soluble and their fluorescence is quenched by modest concentrations of chloride ions. One of the dyes, dye 1 , has a chloride Stern–Volmer constant of 255 mol −1 dm 3 , which is one of the highest reported. Fluorescence quantum yields of the dyes have been determined using quinine sulphate as a reference and are all found to be similar lying in the range 0.5–0.64. Applications for chloride determination in biological systems using these probes are discussed.