异丙酚分子印迹聚合物的制备及其结合特性

采用分子印迹技术制备了异丙酚分子印迹聚合物,并考察其结合特性和选择性。以异丙酚为模板分子,甲基丙烯酸为功能单体,二甲基丙烯酸乙二醇酯为交联剂,偶氮二异丁腈为引发剂,甲苯、正己烷为溶剂合成异丙酚分子印迹聚合物。通过平衡吸附实验,研究了异丙酚分子印迹聚合物的结合特性和选择性。Scatchard模型分析表明,在该聚合物中存在对异丙酚有不同亲和力的两类作用位点。此聚合物与异丙酚的结合要优于麝香草酚。此方法可合成异丙酚分子印迹聚合物,通过结合实验和对底物选择性考察,表明该聚合物对异丙酚具有良好的选择性。     

药物柳胺酚分子印迹聚合物的制备及识别性能研究

采用分子印迹技术合成了对药物柳胺酚有高选择性的印迹聚合物,通过平衡吸附及高效液相色谱的方法对聚合物进行了评价。结果表明,制备的印迹聚合物对模板分子有很强的吸附能力和良好的选择性,可以很好的分离模板分子及其结构类似物。     

沉淀聚合法制备磺胺二甲嘧啶分子印迹聚合物

以磺胺二甲嘧啶为模板分子,采用沉淀聚合法制备了分子印迹聚合物,并对其选择性和吸附性能进行了研究.等温静态平衡实验结果表明,该印迹聚合物与相应的空白聚合物相比具有高的选择性和亲和性;Scatchard模型分析结果表明,该印迹聚合物对印迹分子存在一种均匀的结合位点,最大表观结合量为31.866 mg/g.     

乙酰水杨酸分子印迹聚合物微球的制备及性能研究

以乙酰水杨酸为模板分子,采用沉淀聚合的方式制备了对乙酰水杨酸具有高选择性和亲和性的分子印迹聚合物微球。通过紫外光谱分析法考察了模板分子与功能单体作用规律,优选了功能单体与配合比例。等温吸附实验的结果显示,与相应的空白聚合物相比,印迹聚合物对模板分子具有更高的亲和性;Scatchard数学模型分析的结果表明,印迹聚合物中主要存在一类亲和性质相同的结合位点,其最大表观结合量为37.97 mg/g。选择性吸附实验表明,制备的印迹聚合物对模板分子具有良好的选择性识别能力。     

沉淀聚合法制备Boc-L-苯丙氨酸印迹聚合物

以Boc-L-苯丙氨酸为模板分子,应用沉淀聚合法制备了对Boc-L-苯丙氨酸具有特异性吸附的分子印迹聚合物。通过平衡吸附和高效液相色谱的方法对印迹聚合物进行评价,结果表明印迹聚合物具有高吸附效率和选择性,实现了消旋混和物的快速基线分离。     

氧乐果分子印迹聚合物的制备与性能研究

以氧乐果为模板分子,采用原位逐步聚合法制备了具有良好识别性能的分子印迹聚合物(MIPs),考察了氧乐果、敌敌畏及甲胺磷在氧乐果分子聚合物上的选择性分离富集特性.用氧乐果分子聚合物固相萃取了蔬菜和天然水中的氧乐果.结果表明,聚合物对模板分子产生了印迹效应,对氧乐果有明显的选择性.流速为1.0 mL/min,进样量为20 μL.     

罗丹明B分子印迹聚合物的制备及分子识别性能研究

以三苯甲烷类碱性染料罗丹明B为模板分子,丙烯酰胺为功能分子,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,采用表面修饰分子印迹法,制备对罗丹明B具有特定亲和选择性的分子印迹聚合物。应用红外光谱对印迹聚合物进行表征,通过静态吸附实验对聚合物的吸附动力学进行分析,采用平衡结合实验评价了分子印迹聚合物的吸附性能。结果表明,采用表面修饰分子印迹法所制备的印迹聚合物对罗丹明B表现出较好的特异吸附,对模板分子最大吸附量值为96μmol/g。     

人血红蛋白分子印迹聚合物的制备及分子识别性能

以丙烯酰胺和甲基丙烯酸为功能单体制备得到了具有选择性识别能力的人血红蛋白分子印迹聚合物. 该印迹聚合物的分子识别特性来自聚合物的结合基团与印迹分子的功能基团之间的氢键和静电作用,以及印迹孔穴的空间几何选择性. 研究表明,聚合单体中甲基丙烯酸的含量会影响聚合物对血红蛋白的特异结合能力及分子印迹聚合物的吸附容量和洗脱性能.     

香草醛分子印迹聚合物的制备及其性能研究

以香草醛为模板分子,二甲基丙烯酸乙二醇酯(EDMA)为交联剂,甲基丙烯酸(MAA)为功能单体,采用悬浮聚合法和本体聚合法制备了香草醛分子印迹聚合物。利用扫描电镜、平衡吸附实验、选择性吸附实验等,探讨了两种聚合方法制备出的分子印迹聚合物的性能。结果表明,悬浮聚合法制备的分子印迹聚合物粒径分布更均匀,选择吸附性能更好,更适用于分离材料。     

四溴双酚A分子印迹聚合物的制备及其吸附机制初探

采用分子印迹技术,以四溴双酚A为模板分子、2-乙烯吡啶为功能单体、乙二醇二甲基丙烯酸酯为交联剂。通过本体聚合法合成了对四溴双酚A具有高度选择性的印迹聚合物。平衡吸附实脸表明：与空白聚合物相比,四溴双酚A印迹聚合物具有较高的吸附能力和选择识别能力。同时比较了印迹聚合物对模板分子和结构相似物的识别能力。结果表明印迹聚合物对四溴双酚A具有更好的特异选择性和识别能力,为复杂介质中四溴双酚A的富集检测提供了一种快速准确有效的方法。     

Dummy template molecularly imprinted polymer for omeprazole and the study of its drug binding and release properties

In this study, we tried to prepare an omeprazole (OMP)‐imprinted polymer and study its binding and release properties in an aqueous media. Because of the instability of OMP under polymerization conditions and the inability of the molecule to form effective interactions with monomers, pantoprazole (PANTO) was used as a dummy template for the imprinting process. Different monomers and solvents were evaluated in polymerization. The optimized imprinted polymer was prepared in chloroform as a porogen. Also, 4‐vinylpyridine and ethylene glycol dimethacrylate were selected as a functional monomer and a crosslinker, respectively. The optimized imprinted polymer was evaluated in a binding study. The binding and release properties of the polymer were then investigated at different pHs. Our data indicated a higher affinity of the imprinted polymer to PANTO and OMP than that of nonimprinted polymer (NIP). The maximum percentage of OMP released from the imprinted polymer was 36–41%, whereas that for the NIP was 74–85%. These data were related to the 38–43 and 29–34 μg of OMP released from the imprinted polymer and NIP, respectively. Also, the protective effect of the imprinted polymer for OMP at pH 2 was greater than that of the nonimprinted one. This study revealed that the dummy template molecular imprinting was an effective method for preparing selective imprinted cavities in a polymeric matrix, especially for the molecules that were unstable during polymerization or unable to establish effective bonds with the monomers. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4165–4170, 2013     

Molecularly imprinted polymers synthesized via semi-covalent imprinting with sacrificial spacer for imprinting phenols

Semi-covalent imprinting with carbonyl group as sacrificial spacer was employed to synthesize molecularly imprinted polymer (MIP) for phenols. A series of semi-covalently imprinted polymers were prepared by varying the templates and porogens. The MIP with 4-chlorophenyl (4-vinyl)phenyl carbonate as template was proved to be the best one, with ethylene glycol dimethacrylate (EGDMA) as cross-linker, 2,2-azobisisobutyronitrile(AIBN), and chloroform as initiator and porogen, respectively. Under such conditions, the corresponding non-covalently imprinted polymer was fabricated with 4-chlorophenol (4-CP) as template and 4-vinylpyridine (4-VP) as functional monomer. The polymer prepared by semi-covalent imprinting displayed superior selectivity to the non-covalently imprinted polymer for phenols. The peak broadening and tailing had been largely reduced on the column packed with semi-covalently imprinted polymer. Meanwhile, the constant retention for these phenols and the good linearity for phenol and 4-CP augured that the semi-covalently imprinted polymer had the potential application as stationary phase for quantitative determination of phenols.     

硅胶表面接枝引发转移终止剂制备牛血红蛋白分子印迹聚合物及性能评价

以牛血红蛋白为模板分子,丙烯酰胺为功能单体,N - N甲基双丙烯酰胺为交联剂,通过固定在硅胶表面的引发转移终止剂二乙基二硫代氨基甲酸钠引发聚合反应,应用表面印迹法制备了牛血红蛋白(BHb)印迹聚合物.通过平衡吸附和选择性实验进行评价,结果表明印迹聚合物具有高吸附效率和选择性.     

Catalysis of a β-elimination applying membranes with incorporated molecularly imprinted polymer particles

Summary Molecularly imprinted membranes are known to be applicable as recognition elements in separation, extraction and sensors, however, not as catalysts. In this paper, two different formats of molecularly imprinted membranes were generated and used as catalysts in a dehydrofluorination reaction. The first format was based on cellulose filter membranes which were coated with a polymer imprinted with a transition-state analogue of the chosen reaction. Alternatively, ground bulk polymers have been incorporated in polyvinyl alcohol (PVA) matrices on cellulose membranes. Both types of membranes were evaluated in membrane reactors. Either the substrate solution was pumped once only through the membrane, or the substrate solution was recirculated through the membrane. The coated membranes did not show any specific catalytic effect when comparing the molecularly imprinted with a non-imprinted control polymer membrane. Nevertheless, the PVA membranes containing the imprinted polymer particles showed specific catalytic effects, compared to PVA membranes with incorporated non-imprinted control polymer particles.     

铀酰-salophen印迹聚合物的合成与性能研究

以一种铀酰配合物为模板,制备了一种用于从水相选择性分离铀酰的新型印迹聚合物。用5-氯甲基水杨醛和3,4-二氨基苯甲酸合成四齿配体salophen,再合成铀酰与salophen的配合物铀酰-salophen。然后以甲基丙烯酸甲酯为功能单体,二甲基丙烯酸乙二醇酯为交联剂,铀酰-salophen为模板,合成铀酰的印迹聚合物。聚合物中的铀酰通过酸浸除去。用平衡吸附法研究了聚合物对铀酰的吸附性能和选择识别能力,且探讨了实验条件对印迹聚合物吸附性能的影响。结果表明,在竞争金属离子存在下,印迹聚合物对铀酰具有较高的吸附能力和选择识别能力,选择性系数大于200,且可以循环使用。     

N-水杨酰苯胺分子印迹聚合物的制备及识别性能研究

采用分子印迹技术,以N-水杨酰苯胺为模板分子,丙烯酰胺为功能单体,乙二醇二甲基丙烯酸酯为交联剂,偶氮二异丁腈为引发剂,在甲醇溶液中制备了N-水杨酰苯胺分子印迹聚合物。用平衡吸附及高效液相色谱的方法对聚合物进行了评价,结果表明印迹聚合物对N-水杨酰苯胺有较强的亲和性和良好的选择性。     

杀铃脲分子印迹聚合物制备及识别性能的研究

采用分子印迹技术,以杀铃脲为模板分子,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,在四氢呋喃溶剂中制备了杀铃脲分子印迹聚合物。以平衡吸附及高效液相色谱的方法对聚合物进行了评价。印迹聚合物对模板分子有较强的吸附能力和良好的选择性,可以很好的分离模板分子及其结构类似物。