Abstract
Investigation on Probe Properties of 7‐Hydroxy‐coumarines in Micellar Cetyl‐triethyl‐ammoniumbromide Solution – Means for Characterization of Micellar SystemsAnions of 3‐substituted 7‐hydroxy‐coumarines (1a–c) as fluorescence probes have been studied in this work. Acid‐base equilibria in water and micellar solution of cetyl‐triethylammoniumbromide (cmc = 0,72 mmol l−1), fluorescence properties and fluorescence quenching by octacyano‐molybdate‐IV have been investigated. It has been confirmed that probe and quencher are completely micellized. Fluorescence life times and quenching constants per one quencher molecule in the micell of about 108 s−1 have been determined. The kinetics of saponification of the probe 3‐acetyl‐7‐hydroxy‐coumarine at pH = 12 in micellar solution has been followed by probe fluorescence.
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