表面印迹交替层状组装薄膜

SURFACE MOLECULAR IMPRINTED LAYER-BY-LAYER FILM

在简要概述非常规交替层状组装这一进展后,重点总结了如何利用非常规交替层状组装以实现表面印迹膜的制备.模板分子与聚电解质在溶液中组装形成超分子复合物,然后以此超分子复合物为构筑基元,与感光性高分子,如重氮树脂,通过常规交替层状组装形成聚合物多层膜.利用聚合物多层膜之间的光化学反应形成稳定的多层膜,然后去除模板分子得到分子印迹交替组装薄膜.该研究表明不同的分子间相互作用均可用于分子印迹交替组装薄膜的制备,并且通过引入多点相互作用可以提高其选择性.以此为基础,交替层状组装分子印迹薄膜分别与微接触印刷和膜分离技术相结合,制备了具有正电荷选择性的印章材料和电荷选择性的膜分离材料,从而提供一种新的制备表面分子印迹材料的方法.

This feature article is to summarize the methods of preparing surface molecular imprinted films utilizing unconventional layer-by-layer（LbL） assembly.Template molecules first preassembled with polyelectrolyte in solution to form supramolecular complex.Thus preassembled complex was used sequentially as a building block to construct LbL thin film with other photoreactive building block such as diazoresin at solid/liquid interface.Through photo cross-linking in between layers of the multilayer film following with template washing,the surface molecular imprinted LbL（SMILbL） film was generated.Diversified interactions have been introduced to fabricate the SMILbL film,and the selectivity of the SMILbL film could be effectively enhanced by the introduction of multivalent interaction.For practical application purposes,cation selective stamps and charge selective membranes have been demonstrated by combination of SMILbL film with corresponding microcontact printing and membrane separation technique,providing a new avenue for surface molecular imprinted materials.