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Muang-Non P, Lim KF, Katselas A, Holdsworth CI. Molecular Imprinting Using a Functional Chain Transfer Agent. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27041162. [PMID: 35208956 PMCID: PMC8877225 DOI: 10.3390/molecules27041162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/01/2022] [Accepted: 02/07/2022] [Indexed: 11/23/2022]
Abstract
This study demonstrates the feasibility of molecular imprinting using a functional chain transfer agent sans a functional monomer. Ethylene glycol dimethacrylate (EGDMA)-based MIPs were synthesised in the presence of thioglycolic acid (TGA) possessing a carboxylic acid group, capable of interacting with the chosen test template R,S-(±)-propranolol (PNL) and a labile S-H bond to facilitate an efficient chain transfer reaction. Quantitative 1H NMR measurements showed high PNL and TGA incorporation within the MIP, indicating an efficient chain transfer process and a favourable interaction between PNL and TGA. TGA-50, with the lowest amount of CTA, showed the largest imprinting effect and an imprinting factor (IF) of 2.1. The addition of MAA to the formulation improved the binding capacity of PNL to the MIP but also increased NIP binding, resulting in a slightly decreased IF of 1.5. The Kd for the high-affinity sites of the TGA/MAA MIP were found to be two times lower (10 ± 1 μM) than that for the high-affinity sites of the TGA-only MIPs, suggesting that the incorporation of the functional monomer MAA increases the affinity towards the PNL template. Selectivity studies, cross-reactivity as well as binary competitive and displacement assays showed the TGA-based MIPs to be highly selective towards PNL against pindolol and slightly competitive against atenolol. The morphologies of the polymers were shown to be affected by the concentration of the TGA, transforming into discrete macrospheres (from small aggregates) at a higher TGA concentration.
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Affiliation(s)
- Phonlakrit Muang-Non
- Discipline of Chemistry, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia; (P.M.-N.); (K.F.L.); (A.K.)
- Research School of Chemistry, The Australian National University, Canberra, ACT 2601, Australia
| | - K. Fremielle Lim
- Discipline of Chemistry, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia; (P.M.-N.); (K.F.L.); (A.K.)
- The Product Makers, 50/60 Popes Road, Keysborough, VIC 3173, Australia
| | - Anthony Katselas
- Discipline of Chemistry, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia; (P.M.-N.); (K.F.L.); (A.K.)
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Clovia I. Holdsworth
- Discipline of Chemistry, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia; (P.M.-N.); (K.F.L.); (A.K.)
- Correspondence: ; Tel.: +61-2-4921-5481
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Long F, Zhang Z, Wang J, Yan L, Zhou B. Cobalt-nickel bimetallic nanoparticles decorated graphene sensitized imprinted electrochemical sensor for determination of octylphenol. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.04.054] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Booker K, Holdsworth CI, Doherty CM, Hill AJ, Bowyer MC, McCluskey A. Ionic liquids as porogens for molecularly imprinted polymers: propranolol, a model study. Org Biomol Chem 2015; 12:7201-10. [PMID: 24971654 DOI: 10.1039/c4ob00547c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The selectivity and rebinding capacity of molecularly imprinted polymers selective for propranolol (1) using the room temperature ionic liquids [BMIM][BF4], [BMIM][PF6], [HMIM][PF6] and [OMIM][PF6] and CHCl3 were examined. The observed IF (imprinting factor) values for MIPBF4, MIPPF6 and MIPCHCl3 were 1.0, 1.98 and 4.64, respectively. The longer chain HMIM and OMIM systems returned lower IF values of 1.1 and 2.3, respectively. MIPPF6 also showed a 25% binding capacity reduction vs. MIPCHCl3 (5 μmol g(−1)vs. 7 μmol g(−1) respectively). MIPCHCl3 and MIPPF6 differed in terms of BET surface area (306 m(2) g(−1)vs. 185 m(2) g(−1)), pore size (1.10 and 2.19 nm vs. 0.97 and 7.06 nm), the relative number of pores (Type A: 10.4 vs. 7.5%; Type B: 8.5 vs. 3.0%), and surface zeta potential (−37.9 mV vs. −20.3 mV). The MIP specificity for 1 was examined by selective rebinding studies with caffeine (2) and ephedrine (3). MIPPF6 rebound higher quantities of 2 than MIPCHCl3, but this was largely due to non-specific binding. Both MIPCHCl3 and MIPPF6 showed a higher affinity for 3 than for 2. Reduction in the Room Temperature Ionic Liquid (RTIL) porogen volume had little impact on the polymer morphology, but did result in a modest decrease in IF from 2.6 to 2.3 and in the binding capacity (30% to 19%). MIPCHCl3 retained the highest template specificity on rebinding from CHCl3 (IF = 4.6) dropping to IF = 0.6 in MeOH/[BMIM][PF6]. The MIPCHCl3 binding capacity remained constant using CHCl3, CH2Cl2 and MeOH (46–52%), dropped to 6% on addition of [BMIM][PF6] and increased to 83% in H2O (but at the expense of specificity with IFH2O = 1.4). MIPPF6 rebinding from MeOH saw an increase in specific rebinding to IF = 4.9 and also an increase in binding capacity to 48% when rebinding 1 from MeOH and to 42% and 45% with H2O and CH2Cl2, respectively, although in the latter case the increased capacity was at the cost of specificity with IFCH2Cl2 = 1.2. Overall the MIPPF6 capacity and specificity were enhanced on addition of MeOH.
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Affiliation(s)
- Katherine Booker
- Discipline of Chemistry, University of Newcastle, Callaghan, NSW 2308, Australia.
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Characterization of the Binding Properties of Molecularly Imprinted Polymers. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2015; 150:51-93. [PMID: 25796622 DOI: 10.1007/10_2015_316] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The defining characteristic of the binding sites of any particular molecularly imprinted material is heterogeneity: that is, they are not all identical. Nonetheless, it is useful to study their fundamental binding properties, and to obtain average properties. In particular, it has been instructive to compare the binding properties of imprinted and non-imprinted materials. This chapter begins by considering the origins of this site heterogeneity. Next, the properties of interest of imprinted binding sites are described in brief: affinity, selectivity, and kinetics. The binding/adsorption isotherm, the graph of concentration of analyte bound to a MIP versus concentration of free analyte at equilibrium, over a range of total concentrations, is described in some detail. Following this, the techniques for studying the imprinted sites are described (batch-binding assays, radioligand binding assays, zonal chromatography, frontal chromatography, calorimetry, and others). Thereafter, the parameters that influence affinity, selectivity and kinetics are discussed (solvent, modifiers of organic solvents, pH of aqueous solvents, temperature). Finally, mathematical attempts to fit the adsorption isotherms for imprinted materials, so as to obtain information about the range of binding affinities characterizing the imprinted sites, are summarized.
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Whitcombe MJ, Kirsch N, Nicholls IA. Molecular imprinting science and technology: a survey of the literature for the years 2004-2011. J Mol Recognit 2014; 27:297-401. [PMID: 24700625 DOI: 10.1002/jmr.2347] [Citation(s) in RCA: 275] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 10/28/2013] [Accepted: 12/01/2013] [Indexed: 12/11/2022]
Abstract
Herein, we present a survey of the literature covering the development of molecular imprinting science and technology over the years 2004-2011. In total, 3779 references to the original papers, reviews, edited volumes and monographs from this period are included, along with recently identified uncited materials from prior to 2004, which were omitted in the first instalment of this series covering the years 1930-2003. In the presentation of the assembled references, a section presenting reviews and monographs covering the area is followed by sections describing fundamental aspects of molecular imprinting including the development of novel polymer formats. Thereafter, literature describing efforts to apply these polymeric materials to a range of application areas is presented. Current trends and areas of rapid development are discussed.
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Voltammetric sensor for theophylline using sol–gel immobilized molecularly imprinted polymer particles. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1413-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Shoravi S, Olsson GD, Karlsson BCG, Nicholls IA. On the influence of crosslinker on template complexation in molecularly imprinted polymers: a computational study of prepolymerization mixture events with correlations to template-polymer recognition behavior and NMR spectroscopic studies. Int J Mol Sci 2014; 15:10622-34. [PMID: 24927149 PMCID: PMC4100172 DOI: 10.3390/ijms150610622] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/07/2014] [Accepted: 05/20/2014] [Indexed: 01/16/2023] Open
Abstract
Aspects of the molecular-level basis for the function of ethylene glycol dimethacrylate and trimethylolproprane trimethacrylate crosslinked methacrylic acid copolymers molecularly imprinted with (S)-propranolol have been studied using a series of all-component and all-atom molecular dynamics studies of the corresponding prepolymerization systems. The crosslinking agents were observed to contribute to template complexation, and the results were contrasted with previously reported template-recognition behavior of the corresponding polymers. Differences in the extent to which the two crosslinkers interacted with the functional monomer were identified, and correlations were made to polymer-ligand recognition behavior and the results of nuclear magnetic resonance spectroscopic studies studies. This study demonstrates the importance of considering the functional monomer–crosslinker interaction when designing molecularly imprinted polymers, and highlights the often neglected general contribution of crosslinker to determining the nature of molecularly imprinted polymer-template selectivity.
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Affiliation(s)
- Siamak Shoravi
- Bioorganic & Biophysical Chemistry Laboratory, Linnæus University Centre for Biomaterials Chemistry, Linnæus University, SE-391 82 Kalmar, Sweden.
| | - Gustaf D Olsson
- Bioorganic & Biophysical Chemistry Laboratory, Linnæus University Centre for Biomaterials Chemistry, Linnæus University, SE-391 82 Kalmar, Sweden.
| | - Björn C G Karlsson
- Bioorganic & Biophysical Chemistry Laboratory, Linnæus University Centre for Biomaterials Chemistry, Linnæus University, SE-391 82 Kalmar, Sweden.
| | - Ian A Nicholls
- Bioorganic & Biophysical Chemistry Laboratory, Linnæus University Centre for Biomaterials Chemistry, Linnæus University, SE-391 82 Kalmar, Sweden.
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Xie Q, Li L, Pan J, Meng M, Song Z, Zhu W, Wang B, Yu P. Molecularly imprinted β-cyclodextrin/Kaoline particles for the selective recognition and binding of bisphenol A. CAN J CHEM ENG 2013. [DOI: 10.1002/cjce.21872] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qingjie Xie
- School of Environment; Jiangsu University; Zhenjiang 212013 China
| | - Linzi Li
- School of Environment; Jiangsu University; Zhenjiang 212013 China
| | - JianMing Pan
- College of Chemistry and Chemical Engineering; Jiangsu University; Zhenjiang 212013 China
| | - Minjia Meng
- College of Chemistry and Chemical Engineering; Jiangsu University; Zhenjiang 212013 China
| | - Zhilong Song
- College of Chemistry and Chemical Engineering; Jiangsu University; Zhenjiang 212013 China
| | - Wenjing Zhu
- College of Chemistry and Chemical Engineering; Jiangsu University; Zhenjiang 212013 China
| | - Bing Wang
- School of Environment; Jiangsu University; Zhenjiang 212013 China
| | - Ping Yu
- College of Chemistry and Chemical Engineering; Jiangsu University; Zhenjiang 212013 China
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Preparation of monodisperse curcumin-imprinted polymer by precipitation polymerization and its application for the extraction of curcuminoids from Curcuma longa L. Anal Bioanal Chem 2013; 405:6555-61. [DOI: 10.1007/s00216-013-7088-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 05/22/2013] [Accepted: 05/22/2013] [Indexed: 10/26/2022]
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Xiao P, Corvini P, Dudal Y, Shahgaldian P. Design of Cyclodextrin-Based Photopolymers with Enhanced Molecular Recognition Properties: A Template-Free High-Throughput Approach. Macromolecules 2012. [DOI: 10.1021/ma301104x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pu Xiao
- Institute of Chemistry and Bioanalytics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse 40, CH-4132 Muttenz, Switzerland
| | - Philippe Corvini
- Institute for Ecopreneurship, School
of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse
40, CH-4132 Muttenz, Switzerland
- School of the Environment, Nanjing University, Nanjing, 210093, P. R. China
| | - Yves Dudal
- INOFEA GmbH, Hochbergerstrasse 60c, CH-4057
Basel, Switzerland
| | - Patrick Shahgaldian
- Institute of Chemistry and Bioanalytics, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse 40, CH-4132 Muttenz, Switzerland
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Castell OK, Barrow DA, Kamarudin AR, Allender CJ. Current practices for describing the performance of molecularly imprinted polymers can be misleading and may be hampering the development of the field. J Mol Recognit 2012; 24:1115-22. [PMID: 22038818 DOI: 10.1002/jmr.1161] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A contributing factor to the labored advance of molecularly imprinting as a viable commercial solution to molecular recognition needs is the absence of a standard and robust method for assessing and reporting on molecular imprinted polymer (MIP) performance. The diversity and at times inappropriateness of MIP performance indicators means that the usefulness of the literature back-catalogue, for predicting, elucidating or understanding patterns in MIP efficacy, remains largely inaccessible. We hereby put forward the case that the simple binding isotherm is the most versatile and useful method of assessing and reporting MIP function, allowing direct comparison between polymers prepared and evaluated in different studies. In this study we describe how to correctly plot and interpret a bound / free isotherm and show how such plots can be readily used to predict outcomes, retro-analyze data and optimize experimental design. We propose that by adopting the use of correctly constructed isotherms as the primary form of data representation researchers will enable inter-laboratory comparisons, promote good experimental design and encourage a greater collective understanding of molecular imprinting.
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Affiliation(s)
- Oliver K Castell
- Department of Chemistry, University of Oxford, Oxford, UK, OX1 3TA
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Evaluation of a centrifuged double Y-shape microfluidic platform for simple continuous cell environment exchange. Int J Mol Sci 2012; 13:819-827. [PMID: 22312288 PMCID: PMC3269722 DOI: 10.3390/ijms13010819] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 01/06/2012] [Accepted: 01/09/2012] [Indexed: 11/17/2022] Open
Abstract
We have demonstrated the efficacy of a microfluidic medium exchange method for single cells using passive centrifugal force of a rotating microfluidic-chip based platform. At the boundary of two laminar flows at the gathering area of two microfluidic pathways in a Y-shape, the cells were successfully transported from one laminar flow to the other, without mixing the two microfluidic mediums of the two laminar flows during cell transportation, within 5 s with 1 g (150 rpm) to 36.3 g (900 rpm) acceleration, with 93.5% efficiency. The results indicate that this is one of the most simple and precise tools for exchanging medium in the shortest amount of time.
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Influence of template/functional monomer/cross-linking monomer ratio on particle size and binding properties of molecularly imprinted nanoparticles. J Appl Polym Sci 2011. [DOI: 10.1002/app.35150] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Tse Sum Bui B, Haupt K. Molecularly imprinted polymers: synthetic receptors in bioanalysis. Anal Bioanal Chem 2010; 398:2481-92. [PMID: 20845034 DOI: 10.1007/s00216-010-4158-x] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 08/19/2010] [Accepted: 08/19/2010] [Indexed: 10/19/2022]
Abstract
Molecularly imprinted polymers (MIPs) are tailor-made synthetic materials possessing specific cavities designed for a target molecule. Since they recognise their target analyte with affinities and selectivities comparable to those of antibody-antigen, enzyme-substrate and ligand-receptor interactions, they are often referred to as synthetic receptors or plastic antibodies. In this review, we describe the great potential and recent developments of MIPs in affinity separations, with emphasis on their application to the solid-phase extraction (SPE) of analytes from complex matrices. Research efforts made in this field to obtain water-compatible polymers for their applicability in aqueous environments are described. We particularly discuss problems encountered in the use of MIPs in SPE and the attempts carried out to improve their efficiency.
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Khorrami AR, Rashidpur A. Design of a new cartridge for selective solid phase extraction using molecularly imprinted polymers: Selective extraction of theophylline from human serum samples. Biosens Bioelectron 2009; 25:647-51. [DOI: 10.1016/j.bios.2008.11.033] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Revised: 10/21/2008] [Accepted: 11/27/2008] [Indexed: 12/01/2022]
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Hu Y, Liu R, Zhang Y, Li G. Improvement of extraction capability of magnetic molecularly imprinted polymer beads in aqueous media via dual-phase solvent system. Talanta 2009; 79:576-82. [DOI: 10.1016/j.talanta.2009.04.029] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2009] [Revised: 04/10/2009] [Accepted: 04/16/2009] [Indexed: 11/30/2022]
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Pradhan S, Boopathi M, Kumar O, Baghel A, Pandey P, Mahato TH, Singh B, Vijayaraghavan R. Molecularly imprinted nanopatterns for the recognition of biological warfare agent ricin. Biosens Bioelectron 2009; 25:592-8. [PMID: 19394810 DOI: 10.1016/j.bios.2009.03.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Revised: 03/09/2009] [Accepted: 03/25/2009] [Indexed: 11/24/2022]
Abstract
Molecularly imprinted polymer (MIP) for biological warfare agent (BWA) ricin was synthesized using silanes in order to avoid harsh environments during the synthesis of MIP. The synthesized MIP was utilized for the recognition of ricin. The complete removal of ricin from polymer was confirmed by fluorescence spectrometer and SEM-EDAX. SEM and EDAX studies confirmed the attachment of silane polymer on the surface of silica gel matrix. SEM image of Ricin-MIP exhibited nanopatterns and it was found to be entirely different from the SEM image of non-imprinted polymer (NIP). BET surface area analysis revealed more surface area (227 m(2)/g) for Ricin-MIP than that of NIP (143 m(2)/g). In addition, surface area study also showed more pore volume (0.5010 cm(3)/g) for Ricin-MIP than that of NIP (0.2828 cm(3)/g) at 12 nm pore diameter confirming the presence of imprinted sites for ricin as the reported diameter of ricin is 12 nm. The recognition and rebinding ability of the Ricin-MIP was tested in aqueous solution. Ricin-MIP rebound more ricin when compared to the NIP. Chromatogram obtained with Ricin-MIP exhibited two peaks due to imprinting, however, chromatogram of NIP exhibited only one peak for free ricin. SDS-PAGE result confirmed the second peak observed in chromatogram of Ricin-MIP as ricin peak. Ricin-MIP exhibited an imprinting efficiency of 1.76 and it also showed 10% interference from the structurally similar protein abrin.
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Affiliation(s)
- Santwana Pradhan
- Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, India
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Castell OK, Allender CJ, Barrow DA. Continuous molecular enrichment in microfluidic systems. LAB ON A CHIP 2008; 8:1031-1033. [PMID: 18584075 DOI: 10.1039/b800521d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Highly efficient molecular extractions in continuous flow microfluidic systems are demonstrated utilising the rapid mixing properties of biphasic segmented flow in conjunction with suspended micro-particulate adsorbents. A continuous flow technique providing potential for continual on-line sample enrichment, purification and clean-up in chemical synthesis, and sample preparation.
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Affiliation(s)
- Oliver K Castell
- Molecular Recognition Research Unit, Welsh School of Pharmacy, Cardiff University, King Edward VII Avenue, Cardiff, UK.
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Yoshimatsu K, Ye L, Lindberg J, Chronakis IS. Selective molecular adsorption using electrospun nanofiber affinity membranes. Biosens Bioelectron 2008; 23:1208-15. [DOI: 10.1016/j.bios.2007.12.002] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2007] [Revised: 11/19/2007] [Accepted: 12/03/2007] [Indexed: 10/22/2022]
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Haginaka J. Monodispersed, molecularly imprinted polymers as affinity-based chromatography media. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 866:3-13. [PMID: 17669699 DOI: 10.1016/j.jchromb.2007.07.019] [Citation(s) in RCA: 136] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2007] [Revised: 06/27/2007] [Accepted: 07/05/2007] [Indexed: 11/23/2022]
Abstract
This review article deals with preparation methods for spherical and monodispersed molecularly imprinted polymers (MIPs) in micrometer sizes. Those methods include suspension polymerization in water, liquid perfluorocarbon and mineral oil, seed polymerization and dispersion/precipitation polymerization. The other methods are the use of beaded materials such as a spherical silica or organic polymer for grafting MIP phases onto the surfaces of porous materials or filling the pores of silica with MIPs followed by dissolution of the silica. Furthermore, applications of MIP microspheres as affinity-based chromatography media, HPLC stationary phases and solid-phase extraction media, will be discussed for pharmaceutical, biomedical and environmental analysis.
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Affiliation(s)
- Jun Haginaka
- Faculty of Pharmaceutical Sciences, Mukogawa Women's University, 11-68 Koshien Kyuban-cho, Nishinomiya, Hyogo 663-8179, Japan.
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Baghel A, Boopathi M, Singh B, Pandey P, Mahato TH, Gutch PK, Sekhar K. Synthesis and characterization of metal ion imprinted nano-porous polymer for the selective recognition of copper. Biosens Bioelectron 2007; 22:3326-34. [PMID: 17350247 DOI: 10.1016/j.bios.2007.01.016] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Revised: 12/29/2006] [Accepted: 01/18/2007] [Indexed: 11/17/2022]
Abstract
Selective recognition of metal ions utilizing metal ion-imprinted polymers (MIIPs) received much importance in diverse fields owing to their high selectivity for the target metal ions. In the present study, a copper ion imprinted polymer was synthesized without an additional complexing ligand or complex with a broad aim to avoid the conventional extra metal ion complexing ligand during the synthesis of MIIP. The complete removal of the copper metal ion from the MIIP was confirmed by AAS and SEM-EDX. SEM image of the MIIP exhibited nano-patterns and it was also found to be entirely different from that of non-imprinted polymer and polymer with copper metal ions. BET surface area analysis revealed more surface area (47.96 m(2)/g) for the Cu(II)-MIIP than non-imprinted control polymer (41.43 m(2)/g). TGA result of polymer with copper metal ion indicated more char yield (18.41%) when compared to non-imprinted control polymer (8.3%) and Cu(II)-MIIP (less than 1%). FTIR study confirmed the complexation between Cu(II)-MIIP and Cu(II) metal ion through carbonyl oxygen of acryl amide. The Cu(II)-MIIP exhibited an imprinting efficiency of 2.0 and it was showing 8% interference from a mixture of Zn, Ni and Co ions. A potentiometric ion selective electrode devised with Cu(II)-MIIP showed more potential response for Cu(II) ion than that was fabricated from non-imprinted polymer.
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Affiliation(s)
- Anuradha Baghel
- Defence Research and Development Establishment, Jhansi Road, Gwalior 474002, India
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