中文摘要：

首先利用共沉淀法合成了磁性材料Fe3O4,再以吡咯为单体,L-色氨酸为模板分子,采用化学聚合法使吡咯在Fe3O4表面发生原位聚合,同时通过分子间的作用力以及氢键作用将模板分子掺杂到Fe3O4表面的聚吡咯中,从而制备了分子印迹聚吡咯/Fe3O4复合材料,并且利用该材料的磁性质实现固液分离。在1 mol/L的NaOH溶液中,通过施加1 V的电位使聚吡咯发生过氧化从而使L-色氨酸模板分子脱掺杂。根据分子印迹的原理,该分子印迹的复合材料可用于识别L-色氨酸光学异构体。将扫描电镜、X射线衍射及电化学法用于该分子印迹复合材料的表征。将该材料填入到多孔陶瓷管,将L-和D-色氨酸溶液分别流过该多孔陶瓷管,流出液用高效液相色谱检测,发现该复合材料对于L-色氨酸的富集能力接近D-色氨酸的两倍,说明该复合材料具有作为手性识别色谱固定相的潜力。

英文摘要：

Ferrosoferric oxide（Fe3 O4） magnetic material was first synthesized,and then the in-situ chemical polymerization of pyrrole was carried out on the surface of Fe3 O4 by using pyrrole and L-tryptophan（L-Trp） as the functional monomer and templates,respectively.As a result,molecularly imprinted polypyrrole/Fe3 O4 composite material was obtained.This composite material was separated from the solution because of its magnetic property.Polypyrrole in the composite was overoxidized in 1 mol/L NaOH solution by applying a potential of 1.0 V,and thus L-Trp templates were de-doped from the composite.Scanning electron microscopy（SEM）,X-ray diffraction（XRD） and electrochemical methods were employed to characterize the composite.The solution containing L-or D-Trp was pumped through a porous ceramic tube packed with the composite,separately.High performance liquid chromatography（HPLC） was adopted for the detection of L-or D-Trp in the eluate,and the results indicated that the enrichment ability of the composite for L-Trp was almost 2 times of that of D-Trp.Therefore,the electro-magnetic composite material has potential applications as chromatographic stationary phase for chiral recognition.