| 2,4-二硝基氯苯碱性水解胶团催化的活化能 |
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| 引用本文： | 赵振国,焦天恕.2,4-二硝基氯苯碱性水解胶团催化的活化能[J].高等学校化学学报,1999,20(2):281-285. |
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| 作者姓名： | 赵振国 焦天恕 |
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| 作者单位： | 北京大学物理化学研究所, 北京 100871 |
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| 摘 要： | 研究了阳离子表面活性剂氯化十六烷基吡啶(CPC)和十六烷基三甲基氯化铵(CTAC)胶团对2,4-二硝基氯苯(DNCB)碱性水解的催化作用和小分子极性有机物丁醇的加入对该反应的影响,计算了反应活化能.结果表明:(1)CPC和CTAC胶团对DNCB碱性水解都有明显的催化作用;(2)加入少量叔丁醇略有利于提高催化效果;(3)在CPC和CTAC胶团溶液中DNCB碱性水解反应的活化能约为49kJ/mol,比纯水中的91kJ/mol低得多,说明反应机制可能存在差异.
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| 关 键 词： | 胶团催化 2 4-二硝基氯苯 阳离子表面活性剂 胶团催化活化能 |
| 收稿时间： | 1998-03-31 |
Activation Energy of Micellar Catalysis on the Basic Hydrolysis of 2,4-Dinitrochlorobenzene |
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| ZHAO Zhen-Guo,JIAO Tian-Shu.Activation Energy of Micellar Catalysis on the Basic Hydrolysis of 2,4-Dinitrochlorobenzene[J].Chemical Research In Chinese Universities,1999,20(2):281-285. |
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| Authors: | ZHAO Zhen-Guo JIAO Tian-Shu |
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| Institution: | Institute of Physical Chemistry, Peking University, Beijing, 100871 |
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| Abstract: | The micellar catalysis of cetyl pyridine
chloride(CPC) and cetyl trimethyl ammonium chloride(CTAC) on the basic hydrolysis of
2,4\|dinitrochlorobenzene(DNCB) was investigated and the effect of adding butyl alcohol on
the activation energy of the basic hydrolysis under micellar catalysis was calculated.
The results show that: (1) The hydrolysis is catalyzed obviously by CPC and CTAC
micelles; (2) Addition of small amount of \%t\%\|C\-4H\-9OH enhances the catalytic effect of
CPC micelle; (3) The activation energy of the hydrolysis reaction in the solution of
cationic micelles is 49 kJ\5mol\+\{-1\}, which is much lower than the value of 91
kJ\5mol\+\{-1\} in water, implying a difference between the mechanisms of hydrolysis
reaction in water and in micellar solutions. |
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| Keywords: | 2 |
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