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Enantiomeric Resolution on L-Carnitine Selective Polymers Prepared by Molecular Imprinting 被引量:2
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作者 XiaoTaoLI GuangGuangJIANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第2期157-158,共2页
L-carnitine selective polymers were prepared by molecular imprinting using methacrylic acid as the functional monomer. The acid function of the monomer is expected to form hydrogen bond and ionic interactions with th... L-carnitine selective polymers were prepared by molecular imprinting using methacrylic acid as the functional monomer. The acid function of the monomer is expected to form hydrogen bond and ionic interactions with the amine function of the target molecule L-carnitine. The imprinted polymers were used as stationary phases in high-performance liquid chromatography (HPLC). It was shown that L-carnitine imprinted polymer exhibited a higher affinity to its template molecule, while the non-imprinted polymer had no affinity to the compounds tested. Racemic carnitine hydrochloride was efficiently resolved on the L-carnitine imprinted polymer, and the separation factor is 1.9. 展开更多
关键词 L-CARNITINE racemic carnitine hydrochloride molecular imprinting polymer HPLC.
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Preparation of bowl-shaped polydopamine surface imprinted polymer composite adsorbent for specific separation of 2'-deoxyadenosine
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作者 Pan Wang Mengdei Zhou +4 位作者 Zhuangxin Wei Lu Liu Tao Cheng Xiaohua Tian Jianming Pan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第8期69-79,共11页
Molecularly imprinted polymers (MIPs) have great potential as adsorbents for selective adsorption and separation of nucleoside compounds,but effectively enhancing the affinity of recognition sites by adjusting the for... Molecularly imprinted polymers (MIPs) have great potential as adsorbents for selective adsorption and separation of nucleoside compounds,but effectively enhancing the affinity of recognition sites by adjusting the forces between template molecules and functional monomers remains an important challenge.In this work,a surface imprinting strategy was used to construct bowl-shaped molecularly imprinted composite sorbents (BHPN@MIPs) based on polydopamine (PDA) particles and have achieved selective separation and purification of 2'-deoxyadenosine (dA).Where by the base complementary pairing interaction of the combined template molecule d A and the pyrimidine functional monomer can enhance the preassembly force,and the hydrophilic bowl-shaped PDA can provide a larger storage space contact efficiency of d A in the test solution,causing the site utilization much higher and improving the kinetic adsorption performance.The equilibrium adsorption time and maximum adsorption capacity of60 min and 328.45μmol·g^(-1)were observed by static adsorption experiments,and the selectivity experimental results showed an imprinting factor IF of 1.30.After four adsorption–desorption cycles,the initial adsorption equilibrium adsorption capacity of BHPN@MIPs still retained 91.14%.By evaluating the selective adsorption of d A in spiked human serum solutions,BHPN@MIPs can be used to selectively enrich and analyze target d A in complex biological samples. 展开更多
关键词 molecularly imprinted polymers(mips) Bowl-shaped Base complementary pairing interaction Selective separation 2'-deoxyadenosine(dA)
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Preparation of high selective molecularly imprinted polymers for tetracycline by precipitation polymerization 被引量:4
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作者 Tao Jing Xiao Dan Gao +5 位作者 Peng Wang Yan Wang Yan Fei Lin Xu Chen zong Yi Kai Zhou Su Rong Mei 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第12期1535-1538,共4页
High selective molecularly imprinted polymers (MIPs) for tetracycline have been prepared by precipitation polymerization. Effects of monomer and solvent, the ratio of monomer and template and the characterization of... High selective molecularly imprinted polymers (MIPs) for tetracycline have been prepared by precipitation polymerization. Effects of monomer and solvent, the ratio of monomer and template and the characterization of the polymer were investigated by frontal chromatography and selectivity experiment. The results clearly indicated that the polymer, which had the highest molecular recognition abilities for tetracycline antibiotics, had been received. 展开更多
关键词 Precipitation polymerization Tetracycline antibiotics molecularly imprinted polymers (mips) HPLC
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Tetracycline selective electrode based on molecularly imprinted polymer particles 被引量:1
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作者 Zhi Yong Guo Pan Pan Gai Jing Duan Hui Na Zhang Sui Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第10期1235-1238,共4页
Tetracycline selective electrode using molecularly imprinted polymer particles as quasi-ionophore was constructed the first time, and its performance was carefully characterized. Due to the specific recognition of tet... Tetracycline selective electrode using molecularly imprinted polymer particles as quasi-ionophore was constructed the first time, and its performance was carefully characterized. Due to the specific recognition of tetracycline by the particles, the selectivity coefficients for routine interferences were less than 10-4. Benefited from the absence of tetracycline in the sensitive membrane and the optimized composition of the inner filling solution, the limit of detection of the electrode was reduced to about 2.5 × 10^-8 mol/ L. It exhibited a good electrode slope 57.6 mV/decade near the theoretical Nernstian one, with a wide linear working range from 6.0 × 10^-8 to 1.0 × 10^-3 mol/L. The fabricated electrode should be used in pH 2--4, response time of which was less than 200 s when the concentration of tetracycline was higher than 1.0 × 10^-6 mol/L and no more than 30 min at the concentration of 1.0 × 10^-8 mol/L. 展开更多
关键词 Ion selective electrode molecular imprinting polymer Quasi-ionophore TETRACYCLINE
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Molecularly Imprinted Polymer Based on GO-QDs as Enhanced Fluorescent Nanoscale Device for Specific Recognition of Target Protein 被引量:1
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作者 DING Zhao-qiang GONG Xiao +3 位作者 TAO Lei QUAN Jing NIE Hua-li ZHU Li-min 《Journal of Donghua University(English Edition)》 EI CAS 2014年第5期603-608,共6页
In this work the enhanced molecularly imprinted optosensing material based on graphene oxide-quantum dots ( GO- QDs) was synthesized for highly selective and sensitive specific recognition of the target protein, bov... In this work the enhanced molecularly imprinted optosensing material based on graphene oxide-quantum dots ( GO- QDs) was synthesized for highly selective and sensitive specific recognition of the target protein, bovine serum albumin (BSA). Here, GO was introduced to enhance the efficiency of mass-transfer in recognition of target protein. Molecularly imprinted polymer coated GO-QDs using BSA as template (BMIP-coated GO-QDs ) exhibited a fast mass-transfer speed, which could be ascribed to the high volume of efficient surface area and high target recognition efficiency of the synthesized nanoscale device. Under optimal conditions, it was found that the BSA as target protein could remarkably quench the relative fluorescence intensity of BMIP- coated GO-QDs linearly in a concentration-dependent manner that was best described by a Stern-Volmer equation. The Ksv (Stern- Volmer constant) for template BSA was much higher than bovine hemoglobin (BHb) and lysozyme (Lyz), implying a highly selective recognition ability of the BMIP-coated GO-QDs to BSA. This enhanced fluorescent nanoscale device may provide opportunities to develop a system that is efficient and effective and has potential in the design of highly effective fluorescent receptor for recognition of target protein in Droteomics studies. 展开更多
关键词 molecularly imprinted polymer (mip) graphene oxide(GO) quantum dots (QDs) protein: FLUORESCENT NANOSCALE DEVICE
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Direct Synthesis of Monodisperse Hollow Molecularly Imprinted Polymers Based on Unfunctionalized SiO2 for the Recognition of Bisphenol A 被引量:1
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作者 Shao-min Liu Meng-xing Wei +1 位作者 Xin Fu Xue-bin Zhang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2018年第2期229-237,246,共10页
A novel and effective approach was developed to synthesize monodisperse hollow molecularly imprinted polymers (MHMIPs) with unfunctionalized SiO2 spheres in a mixture of toluene and CH3CN. The factors that affected ... A novel and effective approach was developed to synthesize monodisperse hollow molecularly imprinted polymers (MHMIPs) with unfunctionalized SiO2 spheres in a mixture of toluene and CH3CN. The factors that affected the synthesis of MHMIPs were systematically investigated. It was determined that a suitable ratio of toluene to CH3CN and the use of a functional monomer that can generate double H-bonding interactions were the critical factors to obtain MHMIPs with high uniformity and rnonodispersion. The obtained MHMIPs exhibited a fast adsorption rate and high adsorption capacity (270 μmol/g) for bisphenol A. As the shell thickness increased from 90 nm to 130 nm, the binding capacity of the imprinted shells decreased gradually. The relative selectivity coefficients of MHMIPs for tetra-brornobisphenol A (TBBPA), phenol and p-tert-butylphenol (PTBP) were calculated as 1.53, 1.83 and 1.90, respectively. These findings indicate that MHMIPs have good adsorption performances and suggest applications in the selective removal or sensitive analysis of bisphenol A. 展开更多
关键词 Hollow molecularly imprint molecular recognition Nanostructured polymers Bisphenol A
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Preparation of High Selective Molecularly Imprinted Polymers for (S)-4-Phenyl-2-oxazolidinone
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作者 Yong LUO Lan LIU Li Hong LI Qin Ying DENG 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第12期1551-1554,共4页
(S)-4-Phenyl-2-oxazolidinone imprinted polymers were prepared by using methacrylic acid (MAA) as the functional monomer, and divinylbenzene (DVB) as crosslinker. The factors, which influence the selectivity of t... (S)-4-Phenyl-2-oxazolidinone imprinted polymers were prepared by using methacrylic acid (MAA) as the functional monomer, and divinylbenzene (DVB) as crosslinker. The factors, which influence the selectivity of the polymers were explored. Effective separation was observed for racemic 4-phenyl-2-oxazolidinone in mobile phase of acetonitrile. The investigation of mobile phase suggested that the hydrogen bonds between template and functional monomer was a primary factor in chiral recognition, while the preparation of polymers implied that the л-л stacking interaction between template and crosslinker played a role in imprinting procedure. 展开更多
关键词 molecularly imprinted polymers (mips) 4-phenyl-2-oxazolidinone HPLC.
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Molecularly Imprinted Polymer for Theophylline Retention and Molecular Recognition Properties in Capillary Electrochromatography
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作者 CaiLing-shuang WuCai-ying MeiSu-rong ZengZao-rui 《Wuhan University Journal of Natural Sciences》 CAS 2004年第3期359-365,共7页
Molecular imprinting of theophylline in poly (methacrylic acid- ethylene dimethacrylate) as CEC stationary phases was synthesized by an in situ photo-initiated polymerization reaction. The effect of electrolyte pH on ... Molecular imprinting of theophylline in poly (methacrylic acid- ethylene dimethacrylate) as CEC stationary phases was synthesized by an in situ photo-initiated polymerization reaction. The effect of electrolyte pH on xanthine derivatives and the stability of MIP column performance were investigated. the relative standard deviation (D RS) of migration time of five consecutive runs on MIP column was in the range of 2.2%–3.1%. The reproducibility of migration time column to column of M(A) was in the range of 3.8%–4.9%. The highest column efficiency was more than 140 000 plates per meter. The MIP capillaries had showed better selective for theophylline, which comparing with the reference column. The urine sample was separated by spiked 5×10?4 mol·L?1 theophylline. Key words capillary electrochromatography - molecular imprinting polymers - theophylline CLC number O 657.8 Foundation item: Supported by the National Nature Science Foundation of China (20375028) and the Research Fund for the National High Technology Development “863” of China (2002AA2Z2004)Biography: Cai Ling-shuang (1968-), female, Associate professor, Ph. D, research direction: separation science. 展开更多
关键词 capillary electrochromatography molecular imprinting polymers THEOPHYLLINE
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Selective Recognition and Detection of L-Aspartic Acid by Molecularly Imprinted Polymer in Aqueous Solution
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作者 Nazia Tarannum Meenakshi Singh 《American Journal of Analytical Chemistry》 2011年第8期909-918,共10页
Molecularly imprinted polymers selective for L-aspartic acid (LAA) have been prepared using the carboxy-betaine polymer bearing zwitterionic centres along the backbone. LAA is well known to promote good me-tabolism, t... Molecularly imprinted polymers selective for L-aspartic acid (LAA) have been prepared using the carboxy-betaine polymer bearing zwitterionic centres along the backbone. LAA is well known to promote good me-tabolism, treat fatigue and depression along with its significance in accurate age estimation in the field of forensic science and is an important constituent of ‘aspartame’, the low calorie sweetener. In order to study the intermolecular interactions in the prepolymerization mixture between the monomer and the template (LAA)/non-template (DAA), a computational approach was developed. It was based on the binding energy of the complex between the template and functional monomer. The results demonstrate that electrostatic in-teractions primarily guide the imprinting protocol. The MIP was able to selectively and specifically take up LAA from aqueous solution, human blood serum and certain pharmaceutical samples quantitatively. Hence, a facile, specific and selective technique to detect the amino acid, LAA in the presence of various interfer-rants, in different kinds of matrices is presented. 展开更多
关键词 AMINO ACID L-Aspartic ACID molecularly imprinted polymer (mip) Computational Modeling Carboxybetaine polymer SELECTIVE Recognition
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Uniformly Sized Molecularly Imprinted Polymers: Their Applications to Chiral Separation and Bioanalysis
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作者 HAGINAKA Jun SANBE Haruyo 《色谱》 CAS CSCD 北大核心 2004年第4期306-308,共3页
关键词 手性分离 生物分析 分子印迹聚合物 高效液相色谱分析
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RECENT ADVANCES IN THE PREPARATION OF MOLECULARLY IMPRINTED POLYMERS VIA CONTROLLED RADICAL POLYMERIZATION TECHNIQUES
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作者 ZHANG Ying ZHANG Huiqi 《Chinese Journal of Reactive Polymers》 2008年第1期1-11,共11页
Molecular imprinting technique is a simple and efficient method for the preparation of polymer materials (i.e., molecularly imprinted polymers, MIPs) with tailor-made recognition sites for certain target molecules. Th... Molecular imprinting technique is a simple and efficient method for the preparation of polymer materials (i.e., molecularly imprinted polymers, MIPs) with tailor-made recognition sites for certain target molecules. The resulting MIPs have proven to be versatile synthetic receptors due to their high specific recognition ability, favorable mechanical, thermal and chemical stability, and ease of preparation. Recent years have witnessed significant progress in the synthesis and applications of MIPs. This review focus on the recent developments and advances in the preparation of MIPs via various controlled radical polymerization techniques. 展开更多
关键词 molecular imprinting molecularly imprinted polymers PREPARATION Controlled radical polymerization.
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MOLECULAR IMPRINTED POLYMERS——Novel Polymer Adsorbents
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作者 LI Haitao XU Mancai +1 位作者 SHIZuoqing HE Binglin 《Chinese Journal of Reactive Polymers》 2001年第1期84-94,共11页
Molecular imprinted polymers (MIPs) are novel functional polymer materials and known as specific adsorbents for the template molecules. These novel functional polymers have promised potential applications in racemic r... Molecular imprinted polymers (MIPs) are novel functional polymer materials and known as specific adsorbents for the template molecules. These novel functional polymers have promised potential applications in racemic resolution, sensor, chromatography, adsorptive separation and other fields. This review exhibits the approach for preparing MIPs, the features of MIPs obtained by different routes and the characteristics of adsorptive separations with MIPs. The molecular recognition mechanism and the idea of the present possibilities and limitations of molecular imprinting polymerization are discussed as well. 展开更多
关键词 molecular imprinting polymer preparation Adsorptive separation
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Preparation and Electrochemical Characters of Parathion Molecule Imprinted Polymeric Sensors 被引量:6
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作者 HUANG Yong-xing LIAN Hui-ting SUN Xiang-ying LIU Bin 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2011年第1期28-33,共6页
A sensitive, fast and low-cost molecular imprinted polymeric sensor for quantitative determination of parathion was prepared with chitosan(CS) as function matrix and parathion(PT) as template molecule via constant... A sensitive, fast and low-cost molecular imprinted polymeric sensor for quantitative determination of parathion was prepared with chitosan(CS) as function matrix and parathion(PT) as template molecule via constant potential electrochemical deposition. Sensitive response was obtained with a detection limit of 1.0× 10-7 mol/L and an excellent recognition for PT was achieved due to the good memory capacity of the sensor. The developed sensor exhibited good fabrication reproducibility and acceptable stability, which provided a new promising tool for pesticide analysis. 展开更多
关键词 molecular imprinting polymer Electrochemical sensor CHITOSAN PARATHION
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Nano-silica particles enhanced adsorption and recognition of lysozyme on imprinted polymers gels 被引量:1
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作者 赵文涛 薛彬 +4 位作者 陈振贺 杨戍 张鑫 孙立权 罗爱芹 《Journal of Beijing Institute of Technology》 EI CAS 2015年第4期579-586,共8页
Molecular imprinting technology has a great potential to be used in protein separation and purification. In this work, lysozyme imprinted polyacrylamide gel was prepared with silica particles as a sacrificial template... Molecular imprinting technology has a great potential to be used in protein separation and purification. In this work, lysozyme imprinted polyacrylamide gel was prepared with silica particles as a sacrificial template to generate macro-porosity for fast adsorption. The adsorption equilibrium time and adsorption capacity were 9 h and 56 mg/g respectively, which was 2 h less and 2.3-fold more than polymers without the sacrificial template. In order to test molecular imprinting polymers (MIPs) ' selectivity, bovine serum albumin (BSA) was chosen as interferent for binary adsorption tests. In addition, the adsorption selectivity was further investigated using different molar ratios of lysozyme to BSA with fixed total concentration of proteins, as well as using various total concentra- tions of proteins with an equimolar ratio of lysozyme to BSA. It has been proven that the total con- centration of proteins should be larger than 1.5 × 10^-7 mol/mL, when the molar ratio of BSA to Lyz is 1: 1, in order to effectively separate Lyz from the binary protein mixture. The macro-porous lyso- zyme molecularly imprinted polymers have less adsorption time, larger adsorption capacity, and bet- ter imprinting effect. 展开更多
关键词 LYSOZYME SILICA molecular imprinting macro-porous polymers adsorption kinetics
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Theoretical Researches on the Recognizing Characteristics of Atrazine Imprinted Polymers with Different Functional Monomers 被引量:5
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作者 刘俊渤 孙佳妮 +2 位作者 唐珊珊 陈凯尹 靳瑞发 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第12期1794-1802,共9页
As a widely used herbicide, the threat of atrazine to both environment and health of people has become the focus. Therefore, the research and analysis of atrazine are getting more important. In this work, the MIT was ... As a widely used herbicide, the threat of atrazine to both environment and health of people has become the focus. Therefore, the research and analysis of atrazine are getting more important. In this work, the MIT was used to detect atrazine theoretically. Atrazine was taken as a template molecule. MAA, MMA and TFMAA were taken as the functional monomers, respectively. The geometry optimization, the nature of hydrogen bonds, the NBO charge, and the binding energies of the imprinted molecule with the functional monomers were investigated at the B3LYP/6-31g(d,p) level. Results indicated that atrazine had the strongest interaction with TFMAA. When the ratio of atrazine and TFMAA was 1:6, the amount of H-bond formed from atrazine and TFMAA was the largest. Moreover, TFMAA owned the largest binding energy with atrazine while MMA owned the smallest. The study is helpful to interpret experiment phenomena of molecular imprinting and select better functional monomers. 展开更多
关键词 ATRAZINE molecular-imprinted polymer hydrogen bonds density functional theory
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Molecular Imprinting Technique and Its Application in Food Industry
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作者 任聪 《Agricultural Science & Technology》 CAS 2016年第7期1533-1540,共8页
As a novel technique, molecular imprinting technique are attracting more and more attention in recent years, due to its specific recognition function to im- printed molecules. This paper firstly introduced this techni... As a novel technique, molecular imprinting technique are attracting more and more attention in recent years, due to its specific recognition function to im- printed molecules. This paper firstly introduced this technique from its history, princi- ple, classification and methods, and then reviewed the application in food industry, and presented possible future research orientations. 展开更多
关键词 molecular imprinting imprinted polymers FOOD APPLICATION
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Computer Simulation and Experimental Investigations of Phenobarbital Molecular Imprinting System 被引量:2
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作者 刘俊渤 唐珊珊 +3 位作者 戴正强 王岩 高芊 靳瑞发 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第12期1840-1848,共9页
The interaction process between the phenobarbital(PHN) and acrylamide(AM) was studied using the M062X/6-31G(d,p) method. The PHN and AM were used as the template and functional monomer,respectively. The molecula... The interaction process between the phenobarbital(PHN) and acrylamide(AM) was studied using the M062X/6-31G(d,p) method. The PHN and AM were used as the template and functional monomer,respectively. The molecular electrostatic potential(MEP) was simulated for predicting the reactive sites. The atoms in molecules theory helped to reveal the imprinting mechanism and optimize the molar ratios for PHN and AM. The molecular imprinted polymers(MIPs) containing PHN were synthesized through the precipitation polymerization. The diameter range of the obtained MIPs was from 150 to 390 nm. According to the computational results,MIPs with the molar ratio of PHN and AM equal to 1:6 showed high selective adsorption for PHN. The apparent maximum adsorption quantity(Q_(max)) of MIPs toward PHN was 7.9 mg/g,and the Qmax of nonimprinted polymer microspheres(NIPs) was 3.2 mg/g. Herein,the studies can provide theoretical and experimental references for the controllable fabrication of MIPs. 展开更多
关键词 phenobarbital acrylamide molecular imprinting polymers simulation preparation
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Simultaneous Chiral Separation Using a Combinatorial Molecular Imprinting Phase
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作者 Jin Fang WANG Liang Mo ZHOU +2 位作者 Xue Liang LIU Qing Hai WANG Dao Qian ZHU (Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Dalian 116012) 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第1期65-68,共4页
Molecular imprinting chiral stationary phase against Cbz-L-Serine (Cbz-L-Ser) and Cbz-L-Alaine (Cbz-L-Ala) were prepared utilizing acrylamide + 2-vinylpyridine as combined basic functional monomers. Cross-selectivity ... Molecular imprinting chiral stationary phase against Cbz-L-Serine (Cbz-L-Ser) and Cbz-L-Alaine (Cbz-L-Ala) were prepared utilizing acrylamide + 2-vinylpyridine as combined basic functional monomers. Cross-selectivity was used to obtain simultaneous chiral separations of Cbz-DL-Ser and Cbz-DL-Ala by connecting two columns packed with Cbz-L-Ser and Cbz-L-Ala imprinted chiral stationary phase, respectively. 展开更多
关键词 molecular imprinting polymer chiral stationary phase chiral separation
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Preparation and Cyclic Voltammetry Characterization Of Cu-dipyridyl Imprinted Polymer
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作者 YiNingZENG NingZHENG 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第4期317-320,共4页
Polymer capable of specific binding to Cu-dipyridyl complex was prepared by molecular imprinting technology. The binding specificity of the polymer to the template (Cu-dipyridyl complex) was investigated by cyclic vo... Polymer capable of specific binding to Cu-dipyridyl complex was prepared by molecular imprinting technology. The binding specificity of the polymer to the template (Cu-dipyridyl complex) was investigated by cyclic voltametric scanning using the carbon paste electrode modified by polymer particles in phosphate buffer solution. Factors that influence rebinding of the imprinted polymer were explored. The result demonstrated that the cyclic voltammetry was an efficient approach to explore interactions between template and imprinted polymers. 展开更多
关键词 molecular imprinted polymer copper(II)dipyridyl complex carbon paste electrode cyclic voltammetry.
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Preparation and adsorption behaviors of Cu(Ⅱ) ion-imprinted polymers
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作者 钟世安 《Journal of Chongqing University》 CAS 2008年第1期23-27,共5页
Imprinted polymers were prepared for selective removal of Cu(Ⅱ) ions from metal solutions. Three ion-imprinted polymers were synthesized with methacrylic acid (MAA), acrylamide (AA) and N,N'-methylenebisacryla... Imprinted polymers were prepared for selective removal of Cu(Ⅱ) ions from metal solutions. Three ion-imprinted polymers were synthesized with methacrylic acid (MAA), acrylamide (AA) and N,N'-methylenebisacrylamide (MBAA) respectively as the functional monomers, ethleneglycoldimethacrylate (EGDMA) as the cross-linking agent, 2,2'- azobisisobutyronitrile (AIBN) as the initiator and Cu (Ⅱ) ion as the imprint ion. The template Cu (Ⅱ) ion was removed from the polymer by leaching with a liquid of a 1:1 volumetric ratio of HCl to ethylenediaminetetraacetic acid (EDTA). The capacity and selectivity of Cu(Ⅱ) ion adsorption were investigated with the three imprinted polymers and their non-imprinted counterparts. The polymers have a maximum adsorption capacity at pH 7.0. The isotherm of their batch adsorption of Cu(Ⅱ) ions shows a Langmuir adsorption pattern. Imprinted polymers all have a much higher capacity and higher selectivity of Cu(Ⅱ) adsorption than nonimprinted ones. MAA polymer benefits the most from imprinting. Imprinted MAA polymer has the highest selectivity when used to rebind Cu (Ⅱ) ion from an aqueous solution in the presence of other metal ions. Ion imprinting can be a promising technique of preparing selective adsorbents to separate and preconcentrate metal in a medium of multiple competitive metal ions through solid phase extraction (SPE). 展开更多
关键词 molecular recognition COMPLEXATION metal ion imprinted polymer PRECONCENTRATION solid phase extraction atomic absorption spectrometry copper ion selective adsorption
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