Effects of Organized Media on the Excited-State Intramolecular Proton Transfer of 10-Hydroxybenzo[h]quinoline

Abstract

Absorbance and fluorescence characteristics of 10-hydroxybenzo[h]quinoline (HBQ) are studied in the presence of α-, β-, and γ-cyclodextrins, and the surfactants, hexadecyltrimethylammonium bromide (CTAB), sodium dodecyl sulfate (SDS), and polyoxyethylene(23) lauryl ether (Brij 35). Fluorescence measurements are used to investigate the effect of organized media on the excited-state intramolecular proton transfer (ESIPT) reaction of HBQ by monitoring the large Stokes-shifted tautomer emission. Absorbance measurements are used to further characterize the interactions of HBQ with the various media. © 1995 American Chemical Society.