Surface molecular self-assembly strategy for TNT imprinting of polymer nanowire/nanotube arrays.
Surface molecular self-assembly strategy for TNT imprinting of polymer nanowire/nanotube arrays.
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DOI：
10.1021/ac0615044
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发表时间：
2006-11
影响因子：
7.4
通讯作者：
Chenggen Xie;Zhongpin Zhang;Dapeng Wang;Guijian Guan;Daming Gao;Jinhuai Liu
中科院分区：
文献类型：
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作者：
Chenggen Xie;Zhongpin Zhang;Dapeng Wang;Guijian Guan;Daming Gao;Jinhuai Liu
本文报道了聚合物纳米线/纳米管表面分子自组装分子印迹的研究结果。研究表明，氨基与缺电子硝基芳烃之间存在强烈的电荷转移络合作用，2，4，6-三硝基甲苯（TNT）模板分子可自发地组装到氨基丙基修饰的氧化铝孔壁上，为表面分子印迹技术提供了新的基础。而额外的量的TNT模板进一步补充到前体混合物中，逐步渐进聚合被设计为朝向在氧化铝膜中的TNT印迹聚合物纳米线/纳米管阵列的可控制备。印迹纳米线/纳米管具有高密度的表面印迹位点和规则的内部印迹位点，表现出高的结合TNT分子的能力，这是正常印迹颗粒的近2.5-3.0倍。此外，印迹纳米管和纳米线的结合TNT分子的速率分别增加了约6倍和4倍。在印迹技术中，表面分子组装与纳米结构的结合可以产生比传统方法中仅使用致孔剂更有效的识别位点。本文报道的这种新的、容易的策略可以进一步预期用于制造用于传感或分析应用的各种分子识别纳米阵列。
This paper reports the finding of an investigation of a surface molecular self-assembly strategy for molecular imprinting of polymer nanowires/nanotubes. It has been demonstrated that 2,4,6-trinitrotoluene (TNT) templates were spontaneously assembled onto aminopropyl group-modified alumina pore walls by a strong charge-transfer complexing interaction between amino groups and electron-deficient nitroaromatics, forming a novel basis of surface molecular imprinting. While an additional amount of TNT templates was further replenished into a precursor mixture, a stepwise progressive polymerization was designed toward the controllable preparation of TNT-imprinted polymer nanowire/nanotube arrays in an alumina membrane. The imprinted nanowires/nanotubes with a high density of surface-imprinted sites and regular interior sites exhibit the high capacity of binding TNT molecules, which is nearly 2.5-3.0-fold that of normal imprinted particles. Moreover, the imprinted nanotubes and nanowires have approximately 6- and 4-fold increase in the rate of binding TNT molecules, respectively. The combination of surface molecular assembly with nanostructures in the imprinting technique can create more effective recognition sites than the only use of porogens in traditional approaches. This novel, facile strategy reported herein can be further expected to fabricate various molecular recognition nanoarrays for sensing or analytic applications.