1
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Combining capillary electromigration with molecular imprinting techniques towards an optimal separation and determination. Talanta 2021; 221:121546. [DOI: 10.1016/j.talanta.2020.121546] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/19/2020] [Accepted: 08/20/2020] [Indexed: 01/24/2023]
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2
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Macroscopic Chiral Recognition by Calix[4]arene‐Based Host–Guest Interactions. Chemistry 2018; 24:15502-15506. [DOI: 10.1002/chem.201803564] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 07/30/2018] [Indexed: 01/12/2023]
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3
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Application of molecularly imprinted polymers in analytical chiral separations and analysis. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.01.011] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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4
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Jafari M, Tashkhourian J, Absalan G. Chiral recognition of naproxen enantiomers based on fluorescence quenching of bovine serum albumin-stabilized gold nanoclusters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 185:77-84. [PMID: 28549294 DOI: 10.1016/j.saa.2017.05.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 05/10/2017] [Accepted: 05/14/2017] [Indexed: 06/07/2023]
Abstract
A simple, fast and green method for chiral recognition of S- and R-naproxen has been introduced. The method was based on quenching of the fluorescence intensity of bovine serum albumin-stabilized gold nanoclusters in the presence of naproxen enantiomers. The quenching intensity in the presence of S-naproxen was higher than R-naproxen when phosphate buffer solution at pH7.0 was used. The chiral recognition occurred due to steric effect between bovine serum albumin conformation and naproxen enantiomers. Two linear determination range were established as 7.4×10-7-9.1×10-6 and 9.1×10-6-3.1×10-5molL-1 for both enantiomers and detection limits of 7.4×10-8molL-1 and 9.5×10-8molL-1 were obtained for S- and R-naproxen, respectively. The developed method showed good repeatability and reproducibility for the analysis of a synthetic sample. To make the procedure applicable to biological samples, the removal of heavy metals from the sample is suggested before any analytical attempt.
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Affiliation(s)
- Marzieh Jafari
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran
| | - Javad Tashkhourian
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran.
| | - Ghodratollah Absalan
- Professor Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran.
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Vlakh EG, Korzhikov VA, Hubina AV, Tennikova TB. Molecular imprinting: a tool of modern chemistry for the preparation of highly selective monolithic sorbents. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4501] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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6
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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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Dong Y, Huang X, Wang F, Wang J, Xia H, Wang Z. Determination of Human Serum Protein by Molecularly Imprinted Polymer Derivatized. J CHIN CHEM SOC-TAIP 2014. [DOI: 10.1002/jccs.201400151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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8
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Aydoğan C, Yılmaz F, Çimen D, Uzun L, Denizli A. Enantioseparation of aromatic amino acids using CEC monolith with novel chiral selector,N-methacryloyl-l-histidine methyl ester. Electrophoresis 2013; 34:1908-14. [DOI: 10.1002/elps.201200125] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 03/22/2013] [Accepted: 03/26/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Cemil Aydoğan
- Department of Chemistry; Biochemistry Division, Hacettepe University; Ankara; Turkey
| | - Fatma Yılmaz
- Vocational School of Gerede Chemistry Technology Division; Abant Izzet Baysal University; Bolu; Turkey
| | - Duygu Çimen
- Department of Chemistry; Biochemistry Division, Hacettepe University; Ankara; Turkey
| | - Lokman Uzun
- Department of Chemistry; Biochemistry Division, Hacettepe University; Ankara; Turkey
| | - Adil Denizli
- Department of Chemistry; Biochemistry Division, Hacettepe University; Ankara; Turkey
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9
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Miao W, Zhang L, Wang X, Qin L, Liu M. Gelation-induced visible supramolecular chiral recognition by fluorescent metal complexes of quinolinol-glutamide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5435-5442. [PMID: 23573951 DOI: 10.1021/la400562f] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Three metal complexes consisting of Li(+), Zn(2+), and Al(3+) and quinolinol-functionalized L-glutamides (HQLG), (abbreviated as LiHQLG, Zn(HQLG)2, and Al(HQLG)3) were found to form fluorescent metallogels in several organic solvents. In solution, these chiral complexes showed neither any CD signal in the chromophore region nor chiral recognition of the chiral species. However, upon gel formation, the supramolecular chirality emerged because of the self-assembled nanostructures, which provided an opportunity for the chiral recognition of enantiomeric ligands. The metallogels showed different fluorescence changes when they met with enantiomeric (R,R)- or (S,S)-1,2-diaminocyclohexane. Among them, the Al(HQLG)3 metallogels did not show any change whereas the LiHQLG gels exhibited the same decrease in fluorescence. Interestingly, the Zn(HQLG)2 gels showed obviously different fluorescent color with respect to (R,R)- and (S,S)-1,2-diaminocyclohexane, thus providing visible chiral recognition via the naked eye. Such different recognition ability was discussed on the basis of the assembled chiral nanostructures and the primary molecular structures of the metal complexes. It was shown that both of them played important roles in chiral recognition.
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Affiliation(s)
- Wangen Miao
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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10
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Transferrin recognition based on a protein imprinted material prepared by hierarchical imprinting technique. Mikrochim Acta 2013. [DOI: 10.1007/s00604-013-0994-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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11
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Zaidi SA. Dual-templates molecularly imprinted monolithic columns for the evaluation of serotonin and histamine in CEC. Electrophoresis 2013; 34:1375-82. [DOI: 10.1002/elps.201200640] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 12/28/2012] [Accepted: 01/09/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Shabi Abbas Zaidi
- Department of Chemistry and Kwangwoon Academy of Advanced Studies, Kwangwoon University; Wolgye-Dong; Nowon-Gu; Seoul; Korea
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12
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Madrakian T, Ahmadi M, Afkhami A, Soleimani M. Selective solid-phase extraction of naproxen drug from human urine samples using molecularly imprinted polymer-coated magnetic multi-walled carbon nanotubes prior to its spectrofluorometric determination. Analyst 2013; 138:4542-9. [DOI: 10.1039/c3an00686g] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Wei ZH, Mu LN, Pang QQ, Huang YP, Liu ZS. Preparation and characterization of grafted imprinted monolith for capillary electrochromatography. Electrophoresis 2012; 33:3021-7. [DOI: 10.1002/elps.201200042] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 06/28/2012] [Accepted: 07/29/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Ze-Hui Wei
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics); School of Pharmacy; Tianjin Medical University; Tianjin; P. R. China
| | - Li-Na Mu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics); School of Pharmacy; Tianjin Medical University; Tianjin; P. R. China
| | - Qian-Qian Pang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics); School of Pharmacy; Tianjin Medical University; Tianjin; P. R. China
| | - Yan-Ping Huang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics); School of Pharmacy; Tianjin Medical University; Tianjin; P. R. China
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14
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Trikka FA, Yoshimatsu K, Ye L, Kyriakidis DA. Molecularly imprinted polymers for histamine recognition in aqueous environment. Amino Acids 2012; 43:2113-24. [DOI: 10.1007/s00726-012-1297-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Accepted: 04/05/2012] [Indexed: 12/01/2022]
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15
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Zheng Y, Wang X, Ji Y. Monoliths with proteins as chiral selectors for enantiomer separation. Talanta 2012; 91:7-17. [DOI: 10.1016/j.talanta.2012.01.039] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 01/15/2012] [Accepted: 01/18/2012] [Indexed: 12/25/2022]
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16
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Coatings of one monomer molecularly imprinted polymers for open tubular capillary electrochromatography. J Chromatogr A 2011; 1218:6498-504. [DOI: 10.1016/j.chroma.2011.07.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 06/27/2011] [Accepted: 07/01/2011] [Indexed: 11/20/2022]
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17
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Servant A, Haupt K, Resmini M. Tuning Molecular Recognition in Water-Soluble Nanogels with Enzyme-Like Activity for the Kemp Elimination. Chemistry 2011; 17:11052-9. [DOI: 10.1002/chem.201002747] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Revised: 05/05/2011] [Indexed: 11/10/2022]
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18
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Zheng C, Huang YP, Liu ZS. Recent developments and applications of molecularly imprinted monolithic column for HPLC and CEC. J Sep Sci 2011; 34:1988-2002. [DOI: 10.1002/jssc.201100164] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2011] [Revised: 03/17/2011] [Accepted: 03/17/2011] [Indexed: 11/06/2022]
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19
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Preparation and evaluation of a monolithic molecularly imprinted polymer for the chiral separation of neurotransmitters and their analogues by capillary electrochromatography. J Chromatogr A 2011; 1218:849-55. [DOI: 10.1016/j.chroma.2010.12.054] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 12/08/2010] [Accepted: 12/10/2010] [Indexed: 11/20/2022]
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20
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21
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Monoliths with chiral surface functionalization for enantioselective capillary electrochromatography. J Pharm Biomed Anal 2010; 53:1091-123. [DOI: 10.1016/j.jpba.2010.05.026] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Revised: 05/25/2010] [Accepted: 05/26/2010] [Indexed: 11/23/2022]
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22
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Zaidi SA, Lee SM, Lee JY, Cheong WJ. Comparison of Enantioselective CEC Separation of OT-MIP Capillary Columns with Templates of Various Camphor Derivatives Made by the Pre-established General Preparation Protocol. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.10.2934] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Liao S, Wang X, Lin X, Wu X, Xie Z. A molecularly imprinted monolith for the fast chiral separation of antiparasitic drugs by pressurized CEC. J Sep Sci 2010; 33:2123-30. [DOI: 10.1002/jssc.200900855] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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24
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Preparation of hydrophilic interaction monolithic column and its application in the analysis of melamine in dairy products using pressurized capillary electrochromatography. Se Pu 2010; 28:231-5. [DOI: 10.3724/sp.j.1123.2010.00231] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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25
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Wang MM, Wang HF, Jiang DQ, Wang SW, Yan XP. A strong inorganic acid-initiated methacrylate polymerization strategy for room temperature preparation of monolithic columns for capillary electrochromatography. Electrophoresis 2010; 31:1666-73. [DOI: 10.1002/elps.200900756] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Lin Z, Yang F, He X, Zhao X, Zhang Y. Preparation and evaluation of a macroporous molecularly imprinted hybrid silica monolithic column for recognition of proteins by high performance liquid chromatography. J Chromatogr A 2009; 1216:8612-22. [DOI: 10.1016/j.chroma.2009.10.025] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2009] [Revised: 10/02/2009] [Accepted: 10/07/2009] [Indexed: 10/20/2022]
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27
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Huang YP, Zhang SJ, Wu X, Zhang QW, Liu ZS. Preparation and Characterization of a Low-Density Imprinted Monolithic Column. Chromatographia 2009. [DOI: 10.1365/s10337-009-1226-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Synthesis of fatty acid esters and diacylglycerols at elevated temperatures by alkalithermophilic lipases from Thermosyntropha lipolytica. J Ind Microbiol Biotechnol 2009; 36:1281-7. [DOI: 10.1007/s10295-009-0610-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Accepted: 06/16/2009] [Indexed: 10/20/2022]
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29
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Li M, Lin X, Xie Z. Investigation of enantiomer recognition of molecularly imprinted polymeric monoliths in pressurized capillary electrochromatography screening the amino acids and their derivatives. J Chromatogr A 2009; 1216:5320-6. [DOI: 10.1016/j.chroma.2009.05.012] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2008] [Revised: 05/05/2009] [Accepted: 05/08/2009] [Indexed: 11/16/2022]
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30
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Slater MD, Fréchet JMJ, Svec F. In-column preparation of a brush-type chiral stationary phase using click chemistry and a silica monolith. J Sep Sci 2009; 32:21-8. [PMID: 19051194 DOI: 10.1002/jssc.200800493] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Brush-type chiral stationary phases (CSP) have been prepared both from a silica monolith and, separately, from 10 mum porous silica beads via a process of in-column modification including attachment of the chiral selector via copper-catalyzed azide-alkyne cycloaddition. Azide functionalities were first introduced on the pore surface of each type of support by reaction with 3-(azidopropyl)trimethoxysilane, followed by immobilization of a proline-derived chiral selector containing an alkyne moiety. This functionalization reaction was carried out in dimethylformamide (DMF) in the presence of catalytic amounts of copper (I) iodide. The separation performance of these triazole linked stationary phases was demonstrated in enantioseparations of four model analytes, which afforded separation factors as high as 11.4.
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Affiliation(s)
- Michael D Slater
- Department of Chemistry, University of California, Berkeley, CA, USA
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31
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Guo HS, Kim JM, Kim SJ, Chang SM, Kim WS. Versatile method for chiral recognition by the quartz crystal microbalance: chiral mandelic acid as the detection model. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:648-652. [PMID: 19105607 DOI: 10.1021/la803364v] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Chiral recognition is considered to be the most important, fundamental basis in the development of separation technology for chiral isomers in the pharmaceutical and biotechnology fields. However, the selective detection of individual enantiomers is still one of the most difficult analytical tasks because of the close similarity of the molecular configurations between chiral isomers. This study presents a versatile vapor-diffused molecular assembly (VDMA) reaction approach for chiral recognition by the quartz crystal microbalance (QCM). Chiral L/D-mandelic acid (MA) was used as the detection model, and L-phenylalanine (L-Phe) was used as the selector. The construction of the L-Phe-modified QCM sensor involved a four-step layer-by-layer assembly procedure. Each modification step was analyzed by cyclic voltammetry, the contact angle, and a resonance frequency measurement. The chiral recognizability of the L-Phe-modified QCM sensor to L-mandelic acid was then examined by resonance frequency measurement using the novel VDMA technique and also investigated by atomic force microscope (AFM) measurements. A chiral discrimination factor of up to approximately 9 between L- and d-MA on the L-Phe-modified QCM sensor was obtained by using this gaseous-phase reaction technique. AFM results also showed obvious selective aggregation of L-MA on the L-Phe-modified surface but no noticeable aggregation of D-MA during the VDMA reaction. Both of the QCM and AFM results confirmed the usefulness of this proposed VDMA technique for the study of chiral recognition. The main advantage of the proposed method is that it offers a universal simple application scheme for the QCM detection of small resonance frequency changes due to chiral molecular recognition by a chiral selector immobilized on the QCM sensor surface.
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Affiliation(s)
- Hui-Shi Guo
- Department of Chemistry, Shaoguan University, Shaoguan 512005, PR China
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32
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Giovannoli C, Baggiani C, Anfossi L, Giraudi G. Aptamers and molecularly imprinted polymers as artificial biomimetic receptors in affinity capillary electrophoresis and electrochromatography. Electrophoresis 2008; 29:3349-65. [PMID: 18646281 DOI: 10.1002/elps.200800004] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Artificial biomimetic receptors, such as aptamers and molecular-imprinted polymers, show antibody-like properties which are due to molecular recognition phenomena characterized by high affinity and selectivity. These binding features have made them suitable in all those application fields in which selective recognition is required. Thus, it is not surprising that they are finding applications in affinity CE as well. Recently, a variety of ACE methods have shown themselves to be suitable tools to provide a detailed quantitative characterization of the thermodynamic and kinetic aspects of binding. At the same time, affinity CE can exploit the peculiarities of these binding interactions to set up CE-based analytical tools for the separation and the determination of specific target molecules in microscale formats. This review will provide a detailed description of affinity CE methods recently reported in the literature and related to these topics.
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Affiliation(s)
- Cristina Giovannoli
- Department of Analytical Chemistry, University of Torino, Via Giuria 5, Torino, Italy.
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ZHENG C, LIU ZS, GAO RY, ZHANG YK. Mechanism of Molecular Recognition on Tetrapetide-imprinted Monolith by Capillary Electrochromatography. CHINESE J CHEM 2008. [DOI: 10.1002/cjoc.200890335] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Zaidi SA, Cheong WJ. Robust open tubular layer ofS-ketoprofen imprinted polymer for chiral LC separation. J Sep Sci 2008; 31:2962-70. [DOI: 10.1002/jssc.200800160] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Addition of N-carbobenzyloxy-l-tryptophan as a co-template molecule to molecularly imprinted polymer monoliths for (+)-nilvadipine. J Chromatogr A 2008; 1185:258-62. [DOI: 10.1016/j.chroma.2008.01.059] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2007] [Revised: 01/24/2008] [Accepted: 01/28/2008] [Indexed: 11/17/2022]
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36
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Wu R, Hu L, Wang F, Ye M, Zou H. Recent development of monolithic stationary phases with emphasis on microscale chromatographic separation. J Chromatogr A 2008; 1184:369-92. [DOI: 10.1016/j.chroma.2007.09.022] [Citation(s) in RCA: 232] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 09/06/2007] [Accepted: 09/11/2007] [Indexed: 12/28/2022]
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37
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Qin F, Xie C, Yu Z, Kong L, Ye M, Zou H. Monolithic enantiomer-selective stationary phases for capillary electrochromatography. J Sep Sci 2007; 29:1332-43. [PMID: 16894777 DOI: 10.1002/jssc.200600030] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Monolithic materials have become a well-established format for stationary phases in the field of capillary electrochromatography. Four types of monoliths, namely particle-fixed, silica-based, polymer-based, and molecularly imprinted monoliths, have been utilized as enantiomer-selective stationary phases in CEC. This review summarizes recent developments in the area of monolithic enantiomer-selective stationary phases for CEC. The preparative procedure and the characterization of these columns are highlighted. In addition, the disadvantages and limitations of different monolithic enantiomer-selective stationary phases in CEC are briefly discussed.
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Affiliation(s)
- Feng Qin
- National Chromatographic Research & Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
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38
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Preinerstorfer B, Lämmerhofer M. Recent accomplishments in the field of enantiomer separation by CEC. Electrophoresis 2007; 28:2527-65. [PMID: 17607806 DOI: 10.1002/elps.200700070] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The present review intends to summarize recent developments in the field of enantioselective separations and analysis by CEC. It covers studies published in English language in common peer-reviewed journals within the period between 2003 and 2006. Both, methods making use of chiral mobile phase additives as well as chiral stationary phases for electrochromatographic enantiomer separations, are reviewed. Achievements that have been made on the various column technologies, such as open-tubular, particle-packed, inorganic, organic and particle-fixed (hybrid-type) monolithic as well as molecularly imprinted polymer phases, are discussed.
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Affiliation(s)
- Beatrix Preinerstorfer
- Christian Doppler Laboratory for Molecular Recognition Materials, Institute of Analytical Chemistry and Food Chemistry, University of Vienna, Vienna, Austria
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Zheng C, Liu Z, Gao R, Zhang L, Zhang Y. Recognition of oxytocin by capillary electrochromatography with monolithic tetrapeptide-imprinted polymer used as the stationary phase. Anal Bioanal Chem 2007; 388:1137-45. [PMID: 17554531 DOI: 10.1007/s00216-007-1325-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Revised: 04/20/2007] [Accepted: 04/24/2007] [Indexed: 10/23/2022]
Abstract
Using YPLG (Tyr-Pro-Leu-Gly), a tetrapeptide, as the template, an imprinted monolithic column was prepared and applied to the selective recognition of oxytocin based on the epitope approach and capillary electrochromatography (CEC). By optimizing the polymerization solution in terms of functional monomer, cross-linking reagent, porogen, and imprinted template via CEC evaluations of synthesized columns, an imprinted monolith with good recognition capacity (the imprinting factors for YPLG and oxytocin were 4.499 and 4.013, respectively) and high column efficiency (theoretical plates for YPLG and oxytocin were 22,995 plates/m and 16,952 plates/m, respectively) was achieved. In addition, the effects of various experimental parameters on the recognition of oxytocin, including the organic modifier content, the buffer concentration, and the pH value, were studied systematically. Furthermore, a mixture of oxytocin and other proteins was analyzed using this monolithic CEC column, and oxytocin was eluted much more slowly than other large biomolecules, which demonstrated the high selective recognition ability of such an imprinted monolith for oxytocin with PLG (Pro-Leu-Gly) as the epitope. Figure Separation of a mixture of oxytocin, BSA, bovine hemoglobin, ovalbumin, and lysozyme on the open column, the blank monolithic column, and the monolithic YPLG-imprinted column.
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Affiliation(s)
- Chao Zheng
- College of Chemistry, Nankai University, Tianjin, PR China
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Gübitz G, Schmid MG. Advances in chiral separation using capillary electromigration techniques. Electrophoresis 2007; 28:114-26. [PMID: 17136739 DOI: 10.1002/elps.200600411] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This review gives an overview of recent developments in CZE, EKC, and CEC covering the literature since the year 2004. Since there appeared a special issue on applications, this review focuses on the progress in electromigration techniques and new methodological developments. New techniques, new chiral selectors as well as new chiral stationary phases for CEC are discussed.
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Affiliation(s)
- Gerald Gübitz
- Department of Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, Karl-Franzens-University, Graz, Austria.
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Liu ZS, Zheng C, Yan C, Gao RY. Molecularly imprinted polymers as a tool for separation in CEC. Electrophoresis 2007; 28:127-36. [PMID: 17177248 DOI: 10.1002/elps.200600544] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Molecularly imprinted polymers (MIPs) are synthesized in the presence of a template which results in the formation of specific recognition cavities complementary to the template in shape and chemical functionality. One of the most successful application areas of MIPs is chromatographic sorbents, which are tailor-made synthetic polymers for a given analyte. However, low efficiency of MIP columns is often observed because of slow kinetics of the template. CEC-based MIPs are thought to improve efficiency of MIP-based separation due to the enhanced flow dynamics of CEC. Another attractive feature is the miniaturized format of CEC, so that fewer templates or monomers for the molecular imprinting are consumed, a characteristic desired for 'green chemistry'. The small dimensions of a capillary demand the development of novel polymer formats that can be applied to a miniaturized system. This review discusses the various formats, i.e., the micro- or nanoparticle, the coating and the monolith, for application in CEC as well as the use in MIP syntheses and characteristics.
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Affiliation(s)
- Zhao-Sheng Liu
- College of Pharmacy, Tianjin Medical University, Tianjin, P. R. China.
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Ou J, Dong J, Tian T, Hu J, Ye M, Zou H. Enantioseparation of tetrahydropalmatine and Tröger's base by molecularly imprinted monolith in capillary electrochromatography. ACTA ACUST UNITED AC 2007; 70:71-6. [PMID: 16978700 DOI: 10.1016/j.jbbm.2006.07.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Revised: 06/13/2006] [Accepted: 07/25/2006] [Indexed: 11/22/2022]
Abstract
Two chiral compounds, Tröger's base and tetrahydropalmatine, were enantioseparated on the (5S, 11S)-(-)-Tröger's base and l-tetrahydropalmatine imprinted monolithic capillary columns with CEC, respectively. The monoliths were prepared by in situ thermal-initiated copolymerization of methacrylic acid (MAA) and ethylene dimethacrylate (EDMA). After optimizing the ratio of porogens (toluene and dodecanol), the obtained monolithic capillary columns show good flow-through property and enantioselectivity. The influences of CEC parameters such as pH of the buffer, organic solvent and salt concentration on the electroosmotic flow (EOF) and recognition selectivity were systematically investigated. Under the optimal conditions, baseline resolutions of two chiral compounds were achieved. In addition, the fast separation was obtained within 4 min by applying higher voltage and assisting pressure of 6 bar.
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Affiliation(s)
- Junjie Ou
- National Chromatographic R and A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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Eeltink S, Svec F. Recent advances in the control of morphology and surface chemistry of porous polymer-based monolithic stationary phases and their application in CEC. Electrophoresis 2007; 28:137-47. [PMID: 17149783 DOI: 10.1002/elps.200600573] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This review focuses on developments in the field of polymer-based monolithic columns for CEC published in the literature since the beginning of the year 2005. The possibility of in-situ preparation as well as easy control over their porous properties and surface chemistries clearly make monolithic separation media an attractive alternative to capillary columns packed with particles. Different variables such as polymerization conditions, morphology, and surface chemistry are shown to directly affect performance of monolithic capillary columns in terms of efficiency, analysis time, and retention.
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Affiliation(s)
- Sebastiaan Eeltink
- Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA
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Liu ZS, Xu YL, Yan C, Gao RY. Mechanism of molecular recognition on molecular imprinted monolith by capillary electrochromatography. J Chromatogr A 2005; 1087:20-8. [PMID: 16130693 DOI: 10.1016/j.chroma.2005.05.107] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The recognition mechanism of molecularly imprinted polymer (MIP) in capillary electrochromatography (CEC) is complicated since it possesses a hybrid process, which comprises the features of chromatographic retention, electrophoretic migration and molecular imprinting. For an understanding of the molecular recognition of MIP in CEC, a monolithic MIP in a capillary with 1,1'-binaphthyl-2,2'-diamine (BNA) imprinting was prepared by in situ copolymerization of imprinted molecule, methacrylic acid and ethylene glycol dimethacrylate in porogenic solvent, a mixture of toluene-isooctane. Strong recognition ability and high column performance (theory plates was 43,000 plates/m) of BNA were achieved on this monolithic MIP in CEC mode. In addition, BNA and its structural analogue, 1,1'-bi-2, 2'-naphthol, differing in functional groups, were used as model compounds to study imprinting effect on the resultant BNA-imprinted monolithic column, a reference column without imprinting of BNA and a open capillary. The effects of organic modifier concentration, pH value of buffer, salt concentration of buffer and column temperature on the retention and recognition of two compounds were investigated. The results showed that the molecular recognition on MIP monolith in CEC mode mainly derived from imprinting cavities on BNA-imprinted polymer other than chromatographic retention and electrophoretic migration.
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Affiliation(s)
- Zhao-Sheng Liu
- College of Pharmacy, Tianjin Medical University, Tianjin 300070, China
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