小分子有机添加物对胶团催化的影响  

The Effects of Small Organic Additive on Micellar Catalysis

作　　者：阮科[1] 赵振国[1] 马季铭[1] 

机构地区：[1]北京大学化学与分子工程学院,北京100871

出　　处：《高等学校化学学报》2001年第9期1564-1566,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 9733110 )资助

摘　　要：The effects of isopropyl alcohol, tert butyl alcohol, isopentyl alcohol, benzaldehyde on the first order rate constant k 1 of the basic hydrolysis reaction of 2,4 dinitrochlorobenzene in the solution of cetyltrimethylammonium bromide(CTAB) are studied. The results show that k 1 decreases with increasing the concentration of small organic additive. It was found that the smaller the alcohol solubility in water and the larger the binding constant with the micelles, the faster the reaction rate decreases. The pseudophase ion exchange model is applied to quantitatively treat the experimental data. The above results are consistent with that obtained from dynamic light scattering, and are interpreted in terms of the change in micellar structure.The effects of isopropyl alcohol, tert butyl alcohol, isopentyl alcohol, benzaldehyde on the first order rate constant k 1 of the basic hydrolysis reaction of 2,4 dinitrochlorobenzene in the solution of cetyltrimethylammonium bromide(CTAB) are studied. The results show that k 1 decreases with increasing the concentration of small organic additive. It was found that the smaller the alcohol solubility in water and the larger the binding constant with the micelles, the faster the reaction rate decreases. The pseudophase ion exchange model is applied to quantitatively treat the experimental data. The above results are consistent with that obtained from dynamic light scattering, and are interpreted in terms of the change in micellar structure.

关 键 词：胶团催化 阳离子表面活性剂 假相离子交换模型 化学反应 催化反应 小分子有机添加剂 

分 类 号：O643.32[理学—物理化学]