Separated organized polymerization of an amphiphilic monomer and acrylamide in one-pot reaction
Separated organized polymerization of an amphiphilic monomer and acrylamide in one-pot reaction
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DOI：
10.1021/ma0611321
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发表时间：
2006-11-14
期刊：
影响因子：
5.5
通讯作者：
Tsujii, Kaoru
中科院分区：
文献类型：
--
作者：
Ozawa, Jun;Matsuo, Goh;Tsujii, Kaoru
首次发现两亲性单体衣康酸十二烷基甘油酯（DGI）和丙烯酰胺的单独均聚甚至在一锅自由基反应中发生。DGI分子形成亚微米间距的双层膜层状液晶，在少量离子表面活性剂存在下显示彩虹色。这种有色双层体系可以通过光聚合与丙烯酰胺和亚甲基双（丙烯酰胺）聚合在一起，形成内部含有层状结构的水凝胶。在该聚合过程中，DGI分子单独聚合以形成其均聚物，而不与任何丙烯酰胺和/或亚甲基双（丙烯酰胺）分子反应。这一新现象已被SDS-聚丙烯酰胺凝胶电泳，H-1 NMR和IR光谱的实验技术所证实。这种新型的DGI均聚反应可能是由于DGI分子在其有序的分子组装体中优先形成键而引起的，并且特别是关于生物系统中的化学反应是非常有趣的。本反应系统可以为复杂的有序分子组装系统中的生物反应提供最简单的人工模型。
It has been first found that separated homopolymerization of an amphiphilic monomer, dodecylglyceryl itaconate (DGI), and acrylamide takes place even in one-pot radical reaction. The DGI molecules form a lamellar liquid crystal of bilayer membranes having the spacing distance of submicrometer and show the iridescent color in the presence of small amount of ionic surfactant. This colored bilayer system can be polymerized together with acrylamide and methylenebis(acrylamide) by photopolymerization to form a hydrogel containing the lamellar structure inside. In this polymerization process, the DGI molecules polymerize alone to form its homopolymer without reacting with any acrylamide and/ or methylenebis(acrylamide) molecules. This novel phenomenon has been substantiated by the experimental techniques of SDS-poly(acrylamide) gel electrophoresis, H-1 NMR, and IR spectroscopy. This novel homopolymerization of DGI may be resulted from the preferential bond formation between DGI molecules in their organized molecular assembly and is quite interesting with special reference to the chemical reactions in biological systems. The present reaction system may provide a simplest artificial model for the biological reactions in the complicated organized molecular assembling systems.