Kinetic Study using Ultrasonic Technique on the Dissociation-Recombination Reaction between Micelle and Counter-ion in Dodecyl Pyridinium Chloride Solution

[摘要] The ultrasonic absorption has been measured in aqueous solution of dodecyl pyridinium chloride (DPC) at 20¡É over the frequency range of 0.1¡­90 Mc.The excess absorption was observed only in solutions in which the concentration was higher than the critical micellar concentration(cmc). The mechanism for this feature was attributed to the reaction M2 ¡ê M1 £« 1.2Cl- Where M2 and M1 are two types of micelle. The rate constants of the forward and the reverse reactions were 6.6 ¡¿ 105 sec-1 and 2.7 ¡¿ 1011sec-1 mol-1,2 respectively. Some kinetic charateristics including the free energy, enthalpy and entropy were calculated.

[学科分类] 化学（综合）