Micellar catalysis of organic reactions. Part 35. Kinetic determination of the critical micelle concentration of cationic micelles in the presence of additives
作者:Trevor J. Broxton、John R. Christie、Anthony J. Dole
DOI:10.1002/poc.610070808
日期:1994.8
substrate (whether neutral or charged), the identity of the micellar counterion and the temperature were investigated. It was wound that added bromide or hydroxyl ions resulted in a lower CMC whereas increased temperature led to an increase in the CMC. The nature of the micellar counterion (Br, F, OH, SO4) had little effect on the CMC. The presence of a charged aromatic substrate led to a considerable lowering
通过动力学方法测定十六烷基三甲基溴化铵和十四烷基三甲基溴化铵的临界胶束浓度。这涉及在广泛的洗涤剂浓度范围内确定某些活化的芳族底物的羟基脱卤速率。在含有大量添加的氢氧离子的溶液和本身是两亲的底物中进行测量。常规方法不能放心地应用于此类系统。研究了改变氢氧根离子浓度,添加溴化钠,改变芳香族底物(无论是中性还是带电)的性质,胶束抗衡离子的身份和温度的影响。伤口上添加了溴离子或氢氧根离子导致CMC降低,而温度升高导致CMC升高。胶束抗衡离子的性质(Br,F,OH,SO4)对CMC的影响很小。带电荷的芳族底物的存在导致CMC的显着降低,而所用的中性芳族底物几乎没有效果。