摘要
采用紫外分光光度法研究了两种壳层悬挂β-环糊精单元的两亲性超支化聚合物在缓冲溶液(25℃,pH=11)中的分子包合与识别行为.结果表明,两种聚合物具有来自环糊精单元和两亲性超支化聚合物的双重包合能力,可分别与水溶性染料分子酚酞(PP)、甲基橙(MO)、有机小分子对硝基苯酚(p-NP)等3种客体分子发生单客体包合效应,而且其包合能力强于单一的环糊精或两亲性超支化聚合物;通过客体分子PP和MO证实了这两种聚合物还具有双重识别能力,可以与PP和MO发生双客体包合效应.
The molecular inclusion complexation and recognition behavior of amphiphilic hyperbranched poly- mers with β-cyclodextrin as pendant groups on the shell layer were determined by UV-Vis spectroscopy in bu- ffer solution（pH=11） at 25 ℃. The results indicate that these polymers posses double inclusion capabilities from both β-cyclodextrin and amphiphilic hyperbranched polymer, and also can form inclusion complexation with single-vip, including phenolphthalein, methyl orange, and 4-nitrophenol, respectively. Furthermore, these polymers possess much stronger inclusion capability than that of single β-cyelodextrin or amphiphilic hy- perbranched polymer. On the other hand, these polymers show double recognition behavior when methyl or- ange solution is added dropwise into phenolphthalein solution containing polymers. The phenomenon can be at- tributed to the existence of the different cavities from both β-cyelodextrin and hyperbranched polymer. In addi- tion, the double-vip inclusion behavior of these polymers was also studied via selecting a complex vips sys- tem of phenolphthalein and methyl orange.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第3期632-637,共6页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20674060)
陕西省自然科学基础研究计划(批准号:2007B16)资助
关键词
两亲性超支化聚合物
Β-环糊精
分子包合
分子识别
Amphiphilic hyperbranched polymer
β-Cyclodextrin
Molecular inclusion complexation
Molecu-lar recognition
