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Kochetkov KA, Bystrova NA, Pavlov PA, Oshchepkov MS, Oshchepkov AS. Microfluidic Asymmetrical Synthesis and Chiral Analysis. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.08.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Su J, Ren K, Dai W, Zhao Y, Zhou J, Wu H. A prototypic system of parallel electrophoresis in multiple capillaries coupled with microwell arrays. Electrophoresis 2011; 32:3324-30. [DOI: 10.1002/elps.201100339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Revised: 08/21/2011] [Accepted: 08/30/2011] [Indexed: 12/11/2022]
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Nagl S, Schulze P, Ohla S, Beyreiss R, Gitlin L, Belder D. Microfluidic chips for chirality exploration. Anal Chem 2011; 83:3232-8. [DOI: 10.1021/ac200150w] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Lu H, Chen G. Recent advances of enantioseparations in capillary electrophoresis and capillary electrochromatography. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2011; 3:488-508. [PMID: 32938063 DOI: 10.1039/c0ay00489h] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A comprehensive survey of recent developments and applications of capillary electromigration techniques for enantioseparations from January 2006 to June 2010 is presented. The techniques include capillary electrophoresis, chip capillary electrophoresis and capillary electrochromatography. The separation principles and the chiral recognition mechanisms are discussed. Additionally, on-line preconcentrations in chiral capillary electrophoresis are also reviewed.
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Affiliation(s)
- Huang Lu
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
- Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
| | - Guonan Chen
- Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China.
- Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou, Fujian 350108, China
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Sun X, Li D, Lee ML. Poly(ethylene glycol)-functionalized polymeric microchips for capillary electrophoresis. Anal Chem 2010; 81:6278-84. [PMID: 19572700 DOI: 10.1021/ac9001832] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recently, we reported the synthesis, fabrication, and preliminary evaluation of poly(ethylene glycol) (PEG)-functionalized polymeric microchips that are inherently resistant to protein adsorption without surface modification in capillary electrophoresis (CE). In this study, we investigated the impact of cross-linker purity and addition of methyl methacrylate (MMA) as a comonomer on CE performance. Impure poly(ethylene glycol) diacrylate (PEGDA) induced electroosmotic flow (EOF) and increased the separation time, while the addition of MMA decreased the separation efficiency to approximately 25% of that obtained using microchips fabricated without MMA. Resultant improved microchips were evaluated for the separation of fluorescent dyes, amino acids, peptides, and proteins. A CE efficiency of 4.2 x 10(4) plates for aspartic acid in a 3.5 cm long microchannel was obtained. Chiral separation of 10 different D,L-amino acid pairs was obtained with addition of a chiral selector (i.e., beta-cyclodextrin) in the running buffer. Selectivity (alpha) and resolution (R(s)) for D,L-leucine were 1.16 and 1.64, respectively. Good reproducibility was an added advantage of these PEG-functionalized microchips.
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Affiliation(s)
- Xuefei Sun
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA
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Li B, Jiang L, Xie H, Gao Y, Qin J, Lin B. Development of micropump-actuated negative pressure pinched injection for parallel electrophoresis on array microfluidic chip. Electrophoresis 2009; 30:3053-3057. [PMID: 19681052 DOI: 10.1002/elps.200900177] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A micropump-actuated negative pressure pinched injection method is developed for parallel electrophoresis on a multi-channel LIF detection system. The system has a home-made device that could individually control 16-port solenoid valves and a high-voltage power supply. The laser beam is excitated and distributes to the array separation channels for detection. The hybrid Glass-PDMS microfluidic chip comprises two common reservoirs, four separation channels coupled to their respective pneumatic micropumps and two reference channels. Due to use of pressure as a driving force, the proposed method has no sample bias effect for separation. There is only one high-voltage supply needed for separation without relying on the number of channels, which is significant for high-throughput analysis, and the time for sample loading is shortened to 1 s. In addition, the integrated micropumps can provide the versatile interface for coupling with other function units to satisfy the complicated demands. The performance is verified by separation of DNA marker and Hepatitis B virus DNA samples. And this method is also expected to show the potential throughput for the DNA analysis in the field of disease diagnosis.
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Affiliation(s)
- Bowei Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China.,Graduate School of the Chinese Academy of Sciences, P. R. China
| | - Lei Jiang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China
| | - Hua Xie
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China.,Graduate School of the Chinese Academy of Sciences, P. R. China
| | - Yan Gao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China
| | - Jianhua Qin
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China
| | - Bingcheng Lin
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China
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Abstract
This paper summarizes the history of chiral separations done by using electromigration methods with CDs. Several enantioresolution mechanisms and a wide number of chiral selectors have been applied to the separation of optical isomers by CE. Among them inclusion-complexation with CDs or their derivatives played a very important role in CE. Since the beginning our group was involved in studying method optimization for enantiomer resolution by using these chiral selectors. One of our publications was the basis for further development in the field, at least for us. New chiral selectors, development of theory, new methodological approaches and a wide number of practical applications are the main results achieved in the last almost 25 years using CE as an enantioseparative technique.
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Affiliation(s)
- Salvatore Fanali
- Institute of Chemical Methodologies, National Council of Research, Area della Ricerca di Roma I, Monterotondo Scalo (Rome), Italy.
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Affiliation(s)
- R K Gilpin
- Brehm Research Laboratory University Park, Wright State University, Fairborn, Ohio 45324-2031, USA
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Nagl S, Schulze P, Ludwig M, Belder D. Progress in microchip enantioseparations. Electrophoresis 2009; 30:2765-72. [DOI: 10.1002/elps.200900153] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Ikai T, Okamoto Y. Structure Control of Polysaccharide Derivatives for Efficient Separation of Enantiomers by Chromatography. Chem Rev 2009; 109:6077-101. [DOI: 10.1021/cr8005558] [Citation(s) in RCA: 347] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Tomoyuki Ikai
- EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan, and College of Material Science and Chemical Engineering, Harbin Engineering University, 145 Nantong St. Harbin 150001, P. R. China
| | - Yoshio Okamoto
- EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan, and College of Material Science and Chemical Engineering, Harbin Engineering University, 145 Nantong St. Harbin 150001, P. R. China
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Wang Y, Xiao Y, Tan TTY, Ng SC. Application of Click-chemistry-based perphenylcarbamated beta-CD chiral stationary phase in CEC. Electrophoresis 2009; 30:705-11. [PMID: 19156766 DOI: 10.1002/elps.200800424] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A novel chiral stationary phase (CSP) was prepared by anchoring mono-6-azido-6-deoxyperphenylcarbamated beta-CD onto omega-alkynyl functionalized silica (5 microm) via organic soluble Cu(I)-catalyzed Click chemistry. The obtained CSP was thereafter packed into fused-silica capillary (100 microm id) with an effective length of 9 cm and tested in aqueous CEC to separate a series of racemic aryl alcohols. High separation factors with good resolution were achieved using the current novel CSP. Some pharmaceutical compounds could also be well resolved on this newly derived CSP. The analytical results demonstrate that Click-chemistry-based perphenylcarbamated CSP affords high stability in high electric field and depicts excellent enantioseparation in CEC. The effects of pH value, buffer concentration, applied voltage, concentration of organic modifier and analyte structure on the enantioseparation are also discussed.
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Affiliation(s)
- Yong Wang
- School of Chemical & Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
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Wang Y, Ong TT, Li LS, Tan TTY, Ng SC. Enantioseparation of a novel "click" chemistry derived native beta-cyclodextrin chiral stationary phase for high-performance liquid chromatography. J Chromatogr A 2009; 1216:2388-93. [PMID: 19185873 DOI: 10.1016/j.chroma.2009.01.039] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2008] [Revised: 01/02/2009] [Accepted: 01/06/2009] [Indexed: 11/28/2022]
Abstract
A novel native beta-cyclodextrin chiral stationary phase was prepared via "click" chemistry with cuprous iodide-triphenylphosphine complex as the catalyst and applied for enantioseparation of Dns-amino acids, substituted phenyl and phenoxy group modified propionic acids, flavonoids, and some pharmaceutical compounds such as nimodipine, propranolol, brompheniramine and bendroflumethiazide in reversed-phase high-performance liquid chromatography. The studied analytes could be resolved under different separation conditions. The resolution of Dns-DL-Leu could reach 5.08 using a mobile phase consisting of 1% (w/w) triethylammonium acetate buffer (pH 4.11) and methanol (50:50 v/v). The effects of buffer pH and the content of organic modifier on enantioseparation of Dns-amino acids by this novel chiral phase were being investigated. The separation results demonstrate that click chemistry, a versatile reaction, affords a facile approach towards the preparation of stable chiral stationary phases.
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Affiliation(s)
- Yong Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore
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Preinerstorfer B, Lämmerhofer M, Lindner W. Advances in enantioselective separations using electromigration capillary techniques. Electrophoresis 2009; 30:100-32. [DOI: 10.1002/elps.200800607] [Citation(s) in RCA: 140] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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