共查询到20条相似文献,搜索用时 109 毫秒
1.
2.
分子识别和分子印迹聚合物微球 总被引:1,自引:0,他引:1
分子识别在许多分离、催化以及生物化学过程中常常起着决定性作用。例如 ,分子结构上的微小差别往往可以决定某个生化反应 (如酶反应 )是否能够顺利进行 ,所以长期以来 ,科学家们一直努力寻找分子识别的途径。二十多年前 ,Wulff等采用一种全新的被称作分子印迹(Molecularimprinting)的技术合成出了对糖类和氨基酸衍生物有识别作用的聚合物。此聚合物被称为分子印迹聚合物 (亦称分子模板聚合物 )。分子印迹技术就是指以特定的分子为模板 ,制备对该分子有特殊识别功能和高选择性材料的技术。该技术在最近几年内发展极… 相似文献
3.
4.
5.
6.
分子印迹技术及其应用 总被引:7,自引:0,他引:7
分子印迹是一项具备特异识别功能的新兴技术。本文介绍了其发展历程、基本原理及应用,并对分子印迹聚合物的制备、表征方法等进行综述。主要介绍了模板分子、功能单体、交联剂、溶剂、致孔剂和反应条件等因素对分子印迹聚合物制备的影响及本体聚合、原位聚合、沉淀聚合、悬浮聚合、表面印迹、电聚合等制备方法。另外对近年来分子印迹技术在生物学、分析化学、天然产物化学、医药以及有机合成等方面的应用进行了总结。 相似文献
7.
分子印迹聚合物在分离技术中的研究进展 总被引:2,自引:0,他引:2
由于分子印迹聚合物 (MIP)所具有的独特的预定选择性 ,它在分离技术中的应用研究已受到了普遍关注 ,本文将从MIP的基本概念、制备方法及其在分离技术中的应用等方面对MIP在分离技术中的研究进行简单的评述。引用文献 40篇 相似文献
8.
金属离子印迹聚合物微球的制备研究进展 总被引:4,自引:0,他引:4
对金属离子印迹的原理、发展现状等进行了概述,尤其对印迹聚合物微球制备方法中的种子乳液溶胀聚合、乳液聚合和悬浮聚合、W/O/W多相乳液聚合等方法进行了较详细的介绍。 相似文献
9.
智能聚合物凝胶是一种包含大量溶剂但又不溶解的高分子或大分子聚集体,它们具有良好的溶胀性能和三维空间网络结构,又被称为"软材料",具有独特的物理化学性质。广泛应用于药物载体、生物传感、形状记忆材料等领域。本文综述近年来国内外开发的智能响应性凝胶,重点介绍响应性凝胶的结构特征和性能特点。并对响应性聚合物凝胶的发展进行展望。 相似文献
10.
11.
Molecularly imprinted polymers: present and future prospective 总被引:2,自引:0,他引:2
Vasapollo G Sole RD Mergola L Lazzoi MR Scardino A Scorrano S Mele G 《International journal of molecular sciences》2011,12(9):5908-5945
Molecular Imprinting Technology (MIT) is a technique to design artificial receptors with a predetermined selectivity and specificity for a given analyte, which can be used as ideal materials in various application fields. Molecularly Imprinted Polymers (MIPs), the polymeric matrices obtained using the imprinting technology, are robust molecular recognition elements able to mimic natural recognition entities, such as antibodies and biological receptors, useful to separate and analyze complicated samples such as biological fluids and environmental samples. The scope of this review is to provide a general overview on MIPs field discussing first general aspects in MIP preparation and then dealing with various application aspects. This review aims to outline the molecularly imprinted process and present a summary of principal application fields of molecularly imprinted polymers, focusing on chemical sensing, separation science, drug delivery and catalysis. Some significant aspects about preparation and application of the molecular imprinting polymers with examples taken from the recent literature will be discussed. Theoretical and experimental parameters for MIPs design in terms of the interaction between template and polymer functionalities will be considered and synthesis methods for the improvement of MIP recognition properties will also be presented. 相似文献
12.
Scorrano S Mergola L Del Sole R Vasapollo G 《International journal of molecular sciences》2011,12(3):1735-1743
Fmoc-3-nitrotyrosine (Fmoc-3-NT) molecularly imprinted polymers (MIPs) were synthesized to understand the influence of several functional monomers on the efficiency of the molecular imprinting process. Acidic, neutral and basic functional monomers, such as acrylic acid (AA), methacrylic acid (MAA), methacrylamide (MAM), 2-vinylpyridine (2-VP), 4-vinylpyridine (4-VP), have been used to synthesize five different polymers. In this study, the MIPs were tested in batch experiments by UV-visible spectroscopy in order to evaluate their binding properties. The MIP prepared with 2-VP exhibited the highest binding affinity for Fmoc-3NT, for which Scatchard analysis the highest association constant (2.49 × 10(4) M(-1)) was obtained. Furthermore, titration experiments of Fmoc-3NT into acetonitrile solutions of 2-VP revealed a stronger bond to the template, such that a total interaction is observed. Non-imprinted polymers as control were prepared and showed no binding affinities for Fmoc-3NT. The results are indicative of the importance of ionic bonds formed between the -OH residues of the template molecule and the pyridinyl groups of the polymer matrix. In conclusion, 2-VP assists to create a cavity which allows better access to the analytes. 相似文献
13.
14.
分子印迹手性识别机理及在色谱分离中的应用 总被引:1,自引:0,他引:1
分子印迹聚合物作为一种具有分子识别能力的新型手性固定相,具有可预测洗脱顺序、分离选择性高、物理化学稳定性好等优点,目前已在色谱手性分离领域取得应用。介绍了分子印迹技术及其手性识别机理的最新研究进展,对该技术在色谱分离领域的应用现状、存在的问题及解决方法进行了重点评述,并展望了其今后的发展方向。 相似文献
15.
Surface molecularly imprinted polymers based ZnO quantum dots as fluorescence sensors for detection of diethylhexyl phthalate with high sensitivity and selectivity 下载免费PDF全文
Yangyang Wang Zhiping Zhou Wanzhen Xu Yu Luan Yi Lu Yanfei Yang Tianshu Liu SongJun Li Wenming Yang 《Polymer International》2018,67(8):1003-1010
This work describes the preparation of molecularly imprinted polymers using ZnO quantum dots, which were used for the selective detection of diethylhexyl phthalate (DEHP). Methacrylic acid, ethylene glycol dimethacrylate, 2,2′‐azobis(2‐methylpropionitrile) and ZnO were used as functional monomer, crosslinker, initiator and optical material, respectively. Molecularly imprinted polymers were successfully synthesized, and the linear relationship between fluorescence intensity and amount was from 0.5 to 40 µmol L?1 for DEHP. The coefficient of correlation was 0.9923 and the imprinting factor was 11.16. The results were above 97.50% and relative standard deviation below 3.86% for the detection of DEPH in actual water samples. This study could provide a novel method using molecularly imprinted polymers for highly selective and sensitive detection of DEHP. © 2018 Society of Chemical Industry 相似文献
16.
以D-对羟基苯甘氨酸(D-HPG)为模板分子,以丙烯酰胺(AM)和α-甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯为交联剂,合成了D-HPG分子印迹聚合物,并测定其对D-HPG的识别能力。静态吸附实验表明,以MAA为功能单体制备的分子印迹聚合物具有更强的分子识别能力,其饱和吸附量达43.9 μmol8226;g-1,印迹因子α为3.6。分子力学计算表明,MAA与D-HPG形成复合物的结合能较大,且MAA在乙醇和水中的溶剂化能较小,因此与AM比较,MAA和模板分子D-HPG在乙醇和水中能形成更加稳定的复合物。紫外光谱分析表明,MAA与D-HPG之间的结合力比AM与D-HPG之间的结合力要强,与分子力学计算以及静态吸附实验得到的结果相一致。 相似文献
17.
以Zn2+-阿魏酸-咖啡酸配合物为模板制备了双分子印迹聚合物,优化了制备条件,用傅里叶红外光谱和扫描电镜对分子印迹聚合物进行结构表征,测试了分子印迹聚合物的吸附特性,探讨了分子印迹聚合物固相萃取应用效能并对萃取条件进行了优化.结果表明,当预反应混合液中金属离子、模板总量(阿魏酸-咖啡酸摩尔比为2:3)、功能单体及交联剂用量比为1:1:3:30(摩尔比)时,所得印迹聚合物对两种模板(阿魏酸和咖啡酸)均具有最好的吸附性能,吸附量分别达51.12mg/g和70.26mg/g.吸附动力学测试表明吸附3h,分子印迹聚合物可达到吸附平衡.用分子印迹聚合物进行固相萃取时,优化的淋洗过程为1.00mL H2O、1.00mL甲醇-H2O (3/7,体积比)及1.00mL甲醇-H2O-ACN (4/4/2,体积比),洗脱溶剂为2.00mL甲醇.在优化条件下,分子印迹聚合物可同时选择富集升麻初提液中的阿魏酸和咖啡酸,二者回收率分别为92.67%和95.42%,而且产品中杂质少于用硅胶萃取所得产品. 相似文献
18.
19.
Niccoletta Barbani Elisabetta Rosellini Marco Donati Paolo Costantino Caterina Cristallini Gianluca Ciardelli 《Polymer International》2017,66(6):900-907
The purpose of this work was the preparation and characterization of polymeric membranes for the selective recognition of saccharides using molecular imprinting technology associated with phase inversion. A system able to bind saccharides with high selectivity is particularly important in the pharmaceutical sector, since some of these compounds are constituents of molecules which can exert serious toxic effects even at very low concentrations. Two polymeric matrices were prepared using poly(ethylene‐co‐vinyl alcohol) copolymers, with an ethylene molar content of 32% and 44%, and were imprinted with two different saccharide molecules: maltose and 2‐keto‐3‐deoxy‐d ‐manno‐octulosonate (KDO). Matrices imprinted against maltose and KDO showed an easy template extraction, high binding capability and satisfactory selectivity, particularly for the matrix with an ethylene molar content of 44%. © 2017 Society of Chemical Industry 相似文献
20.
Tyrosine-imprinted microspheres have been prepared in an aqueous system by seed swelling and suspension polymerization, using trimethylolpropane trimethacrylate (TRIM), acrylamide (AM) as well as methacrylic acid (MAA), linear polystyrene and toluene as crosslinker, functional monomers, seeds and porogens, respectively. The size distribution proved to be greatly influenced by the ratio of water:TRIM (W/T) and the concentration of dispersant. When W/T was 46:1 (v/v), 4.6% (by mass) of poly(vinyl alcohol) (PVA) was used as dispersant, the molar ratios of tyrosine, MAA, AM and TRIM were 1:8:8:17, the polymer beads had the better size monodispersity, and the average size was 135 µm, while the sizes of the pores on the beads surfaces ranged from 1.25 µm to 9.0 µm. The adsorption behaviour and molecular selectivity of the beads were analysed using liquid chromatography; the results showed that the adsorption behaviour of the beads followed the rule of Langmuir, and the value of saturated absorption was 0.197 mmol g−1. The tyrosine-imprinted polymers exhibited an inherent selectivity for tyrosine; when phenylalanine was used as the competing molecule the separation factor α was up to 1.91. However, the control polymers did not have this special molecule-selection capability, and the relative separation factor β was about 1.82 compared with the imprinted polymers. © 2002 Society of Chemical Industry 相似文献