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	十二烷基硫酸钠减慢二苯胺-4-重氮盐及重氮树脂在水溶液中热分解反应的机理; The Mechanism of Thermal Decomposition of DDS and DR in Aqueous Solution Delayed by SDS
	杨伯宣 ; 曹维孝
	2000
关键词	二苯胺重氮盐 重氮树脂 十二烷基硫酸钠 热分解反应 diphenylamine-4-diazonium salt diazoresin sodium dodecyl sulfate thermal decomposition
英文摘要	以二苯胺重氮盐(DDS)为模型化合物, 系统考察了其在水中热分解反应与十二烷基硫酸钠(SDS)的浓度以及溶液中小分子电解质的关系, 结合荧光分析结果, 证实了DDS及重氮树脂(DR)在SDS溶液中热稳定性的提高是由于DDS和DR分子与SDS分子间的疏水相互作用和静电吸引作用使它们同SDS分子共同形成混合预胶束或胶束, 通过预胶束或胶束的静电及极性效应使其中的DDS和DR分子上的重氮基得到保护. 随着SDS浓度和小分子电解质(NaCl)浓度的增加, 进入预胶束或胶束中的DDS和DR的量越多, 体系的热稳定性提高得越大. 由于DDS和DR在远低于SDS的临界胶束浓度时(≈10-5 mol/L)形成了预胶束, 从而在SDS浓度很低时即能对DDS和DR起明显的保护作用.; The thermal decomposition of diphenylamine diazonium salt(DDS) as the model compound and diazoresin(DR) in aqueous solution of sodium dodecyl sulfate (SDS) was investigated. The results show that the increasing of thermal stability of DDS and DR in SDS aqueous solution is ascribed to the participating of them into the premicelle or micelle of SDS via the hydrophobic interaction as well as electrostatic attraction between DDS(or DR) and SDS. As a result, the diazonium groups of DDS(or DR) are protected by SDS against thermal decomposition. It is also confirmed that the thermal stability of DDS or DR is related closely to the concentration of SDS and salt(NaCl) existing in solution and increases with increasing [SDS] and [NaCl], It is a reality that the more participation of DDS(or DR) into premicelle or micelle, the more thermal stability of DDS(or DR). Thus, the premicelle form at a low concentration of SDS(approximate to 1x10(-5)mol/L) and exert the protection of DDR(or DR) towards thermal decomposition.; 中国科学院资助项目; SCI(E); EI; 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 1; 6; 969-975; 21
语种	中文
出处	SCI ; 万方 ; http://d.g.wanfangdata.com.cn/Periodical_gdxxhxxb200006024.aspx
出版者	高等学校化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/78498]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	杨伯宣,曹维孝. 十二烷基硫酸钠减慢二苯胺-4-重氮盐及重氮树脂在水溶液中热分解反应的机理, The Mechanism of Thermal Decomposition of DDS and DR in Aqueous Solution Delayed by SDS. 2000-01-01.

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