1
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Zhang C, Ma X, Gu Y. Amino acids-based deep eutectic solvents as additives for improved enantioseparation in capillary electrophoresis. J Sep Sci 2024; 47:e2400122. [PMID: 38772731 DOI: 10.1002/jssc.202400122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/20/2024] [Accepted: 04/22/2024] [Indexed: 05/23/2024]
Abstract
In this study, several amino acids deep eutectic solvents were prepared using L-valine and L-leucine as hydrogen bond acceptors, and L-lactic acid and glycerol as hydrogen bond donors. These amino acids' deep eutectic solvents were first used as buffer additives to construct several synergistic systems along with maltodextrin in capillary electrophoresis for the enantioseparations of four racemic drugs. Compared with single maltodextrin system, the separations of model drugs in the synergistic systems were significantly improved. Some key parameters affecting chiral separation such as maltodextrin concentration, deep eutectic solvent concentration, buffer pH, and applied voltage were optimized. In order to further understand the specific mechanism of the amino acids deep eutectic solvents in improving chiral separation, we first calculated the binding constants of maltodextrin with enantiomers using the capillary electrophoresis method in the two separation modes, respectively. We also used molecular simulation to calculate the binding free energy of maltodextrin with enantiomers. It is the first time that amino acids deep eutectic solvents were used for enantioseparation in capillary electrophoresis, which will greatly promote the development of deep eutectic solvents in the field of chiral separation.
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Affiliation(s)
- Chengchen Zhang
- Department of Geriatrics, Nantong First People's Hospital and Nantong Hospital of Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Nantong, P. R. China
| | - Xiaofei Ma
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, P. R. China
| | - Yan Gu
- Department of Geriatrics, Nantong First People's Hospital and Nantong Hospital of Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Nantong, P. R. China
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2
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Liu W, Xu W, Luan HH, Li G, Liu J, Lu Z, Zhang F, Li H. L-ribose specific recognition surface constructed by pillar[5]arene-based host-guest interaction. Biosens Bioelectron 2023; 241:115678. [PMID: 37703641 DOI: 10.1016/j.bios.2023.115678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/22/2023] [Accepted: 09/06/2023] [Indexed: 09/15/2023]
Abstract
In living organisms, chiral molecules have specific chiral conformations that produce different physiological effects. Ribose is one of the components of RNA, which mainly plays a role in regulating biological activity. Inspired by the biological recognition of sugars, functional chiral surfaces for recognizing L-ribose through non-covalent interactions were constructed. In the strategy of this study, a functional chiral gold surface based on host-guest interactions was constructed through the assembly of the host molecule single-function alynyl pillar[5]arene(SAP5) and the guest molecule (S) -mandelate-violet (SMV). The association constant of SMV and SAP5 was calculated to be 2.95×104 M-1, with a binding ratio of 1:1. By impedance and contact angle detection, the constructed functional interface has good detection effect on L-ribose in the range of 1×10-7 M to1× 10-2 M. In addition, CV was disassembled from the aromatic cavity of pillar[5]arene after adding zinc powder and it can repeat five times with good recyclability, thus achieving the organic combination of interface recognition and intelligence.
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Affiliation(s)
- Wenhui Liu
- College of Chemistry, Huazhong Agricultural University, Wuhan, Hubei, 430070, PR China
| | - Weiwei Xu
- National Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, PR China
| | - Hang-Hang Luan
- Department of Forensic Medicine, Zhongnan Hospital of Wuhan University, No. 169 East Lake Road, Wuchang District, Wuhan, 430071, PR China
| | - Guang Li
- National Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, PR China
| | - Junan Liu
- College of Chemistry, Huazhong Agricultural University, Wuhan, Hubei, 430070, PR China.
| | - Zhiyan Lu
- Department of Forensic Medicine, Zhongnan Hospital of Wuhan University, No. 169 East Lake Road, Wuchang District, Wuhan, 430071, PR China.
| | - Fan Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Health Sciences and Engineering, Hubei University, Wuhan, 430062, PR China.
| | - Haibing Li
- National Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, PR China.
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3
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Borsatto JVB, Lanças FM. Recent Trends in Graphene-Based Sorbents for LC Analysis of Food and Environmental Water Samples. Molecules 2023; 28:5134. [PMID: 37446796 DOI: 10.3390/molecules28135134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/22/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023] Open
Abstract
This review provides an overview of recent advancements in applying graphene-based materials as sorbents for liquid chromatography (LC) analysis. Graphene-based materials are promising for analytical chemistry, including applications as sorbents in liquid chromatography. These sorbents can be functionalized to produce unique extraction or stationary phases. Additionally, graphene-based sorbents can be supported in various materials and have consequently been applied to produce various devices for sample preparation. Graphene-based sorbents are employed in diverse applications, including food and environmental LC analysis. This review summarizes the application of graphene-based materials in food and environmental water analysis in the last five years (2019 to 2023). Offline and online sample preparation methods, such as dispersive solid phase microextraction, stir bar sorptive extraction, pipette tip solid phase extraction, in-tube solid-phase microextraction, and others, are reviewed. The review also summarizes the application of the columns produced with graphene-based materials in separating food and water components and contaminants. Graphene-based materials have been reported as stationary phases for LC columns. Graphene-based stationary phases have been reported in packed, monolithic, and open tubular columns and have been used in LC and capillary electrochromatography modes.
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Affiliation(s)
- João V B Borsatto
- Laboratory of Chromatography, Institute of Chemistry at Sao Carlos, University of Sao Paulo, P.O. Box 780, São Carlos 13566-590, Brazil
| | - Fernando M Lanças
- Laboratory of Chromatography, Institute of Chemistry at Sao Carlos, University of Sao Paulo, P.O. Box 780, São Carlos 13566-590, Brazil
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4
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Zhang C, Fan Y, Cai L, Ma X. Evaluation of kasugamycin as a chiral selector in capillary electrophoresis. Analyst 2023; 148:1322-1329. [PMID: 36853240 DOI: 10.1039/d2an01949c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The discovery of novel chiral selectors always fascinates us. This work describes the chiral separation performances of a new chiral selector (kasugamycin, KAS) in capillary electrophoresis (CE) for six pairs of stereoisomers, including ephedrine and pseudoephedrine, quinine and quinidine, cinchonine and cinchonidine, and amlodipine, promethazine and ofloxacin enantiomers. Kasugamycin, an aminoglycoside antibiotic in agriculture, shows significant biological activity against rice blast with low toxicity. As it turns out, this new chiral selector possesses good CE compatibility and stereoselectivity towards model analytes. In this work, we systematically investigated several separation parameters including kasugamycin concentration, buffer pH, separation voltage and the composition of the buffer solution. A detailed discussion about the chiral recognition mechanism was made based on Statistical Product and Service Solution (SPSS) analysis, NMR experiments (1D and 2D) and molecular modeling. This is the first time that kasugamycin is utilized as a chiral selector in CE, and the development of new chiral selectors from agricultural or veterinary antibiotics deserves more attention.
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Affiliation(s)
- Chunyan Zhang
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, 226001, P. R. China.
| | - Yifeng Fan
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, 226001, P. R. China.
| | - Liangliang Cai
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, 226001, P. R. China.
| | - Xiaofei Ma
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, 226001, P. R. China.
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5
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Ahmed MA, Yu RB, Quirino JP. Recent developments in open tubular liquid chromatography and electrochromatography from 2019–2021. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.117045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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6
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Recent applications and chiral separation developments based on stationary phases in open tubular capillary electrochromatography (2019–2022). J Pharm Anal 2023; 13:323-339. [PMID: 37181297 PMCID: PMC10173184 DOI: 10.1016/j.jpha.2023.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 01/16/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
Capillary electrochromatography (CEC) plays a significant role in chiral separation via the double separation principle, partition coefficient difference between the two phases, and electroosmotic flow-driven separation. Given the distinct properties of the inner wall stationary phase (SP), the separation ability of each SP differs from one another. Particularly, it provides large room for promising applications of open tubular capillary electrochromatography (OT-CEC). We divided the OT-CEC SPs developed over the past four years into six types: ionic liquids, nanoparticle materials, microporous materials, biomaterials, non-nanopolymers, and others, to mainly introduce their characteristics in chiral drug separation. There also added a few classic SPs that occurred within ten years as supplements to enrich the features of each SP. Additionally, we discuss their applications in metabolomics, food, cosmetics, environment, and biology as analytes in addition to chiral drugs. OT-CEC plays an increasingly significant role in chiral separation and may promote the development of capillary electrophoresis (CE) combined with other instruments in recent years, such as CE with mass spectrometry (CE/MS) and CE with ultraviolet light detector (CE/UV).
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7
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Ma X, Chen B, Cai L. Investigation on improvement of enantioseparation in capillary electrophoresis based on maltodextrin by chiral ionic liquids. J Sep Sci 2022; 45:3604-3613. [PMID: 35916273 DOI: 10.1002/jssc.202200408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/12/2022] [Accepted: 07/18/2022] [Indexed: 11/10/2022]
Abstract
Taking advantage of chiral ionic liquids, this study deals with the improvement of the enantioseparation performance of a traditional chiral selector (maltodextrin) in capillary electrophoresis. Herein, two polyhydroxy compound-based chiral ionic liquids, namely tetramethylammonium-D-gluconic acid and tetramethylammonium-shikimic acid were designed and utilized as additives for chiral separation for the first time. The synergistic systems provided much better enantioseparations of twelve model drugs compared to the single maltodextrin system. These model analytes contained analgesics, antidepressants, antiallergic drugs, antifungal drugs, antihypertensive drugs, and antiparkinsonian drugs. After optimizing the separation conditions, the chiral recognition mechanism was probed by means of ultraviolet spectroscopy, nuclear magnetic resonance, and molecular modeling. The results of spectroscopic and computational analyses were in good consistency with enantioseparation outcomes. Finally, the proposed method was successfully used for the determination of the enantiomeric purity of duloxetine hydrochloride.
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Affiliation(s)
- Xiaofei Ma
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, P. R. China
| | - Bohua Chen
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, P. R. China
| | - Liangliang Cai
- Department of Pharmacy, Affiliated Hospital of Nantong University, Nantong, P. R. China
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8
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Gu L, Guan J, Huang Z, Huo H, Shi S, Zhang D, Yan F. β-Cyclodextrin covalent organic framework supported by polydopamine as stationary phases for electrochromatographic enantioseparation. Electrophoresis 2022; 43:1446-1454. [PMID: 35353923 DOI: 10.1002/elps.202200029] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 03/24/2022] [Accepted: 03/26/2022] [Indexed: 02/01/2023]
Abstract
In this work, a new open-tubular capillary electrochromatography (OT-CEC) column was prepared using β-cyclodextrin covalent organic framework (β-CD COF) as a stationary phase. Polydopamine was used to assist fabrication of β-CD COF on an inner wall of a fused-silica capillary. The coating layer on the capillary was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Electroosmotic flow (EOF) was also studied to evaluate the variation of the inner wall of immobilized columns. Furthermore, the chiral separation effectiveness of the fabricated capillary column was evaluated by CEC using enantiomers of several related proton pump inhibitors as model analytes, including omeprazole, lansoprazole, pantoprazole and tenatoprazole. The effects of bonding time and concentration of β-CD COF, the type, concentration and pH of buffer, applied voltage were investigated to obtain satisfactory enantioselectivity. In the optimum conditions, the enantiomers of four analytes were resolved within 15 min with resolutions of 1.63-2.62. The relative standard deviation values for migration times and resolutions of the analytes representing intraday and interday were less than 6.75% and 4.24%, respectively. The results reveal that β-CD COF has great potential as chiral-stationary phases for enantioseparation in CEC.
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Affiliation(s)
- Lei Gu
- College of Chemical Engineering, Liaoning & Shenyang Key Laboratory of Functional Dye and Pigment, Shenyang University of Chemical Technology, Shenyang, P. R. China
| | - Jin Guan
- College of Chemical Engineering, Liaoning & Shenyang Key Laboratory of Functional Dye and Pigment, Shenyang University of Chemical Technology, Shenyang, P. R. China
| | - Ziwei Huang
- College of Chemical Engineering, Liaoning & Shenyang Key Laboratory of Functional Dye and Pigment, Shenyang University of Chemical Technology, Shenyang, P. R. China
| | - Hongyi Huo
- College of Chemical Engineering, Liaoning & Shenyang Key Laboratory of Functional Dye and Pigment, Shenyang University of Chemical Technology, Shenyang, P. R. China
| | - Shuang Shi
- College of Chemical Engineering, Liaoning & Shenyang Key Laboratory of Functional Dye and Pigment, Shenyang University of Chemical Technology, Shenyang, P. R. China
| | - Dongxiang Zhang
- College of Chemical Engineering, Liaoning & Shenyang Key Laboratory of Functional Dye and Pigment, Shenyang University of Chemical Technology, Shenyang, P. R. China
| | - Feng Yan
- College of Science, Shenyang University of Chemical Technology, Shenyang, P. R. China
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9
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Fluorinated covalent organic frameworks as a stationary phase for separation of fluoroquinolones by capillary electrochromatography. Mikrochim Acta 2022; 189:237. [DOI: 10.1007/s00604-022-05333-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 05/09/2022] [Indexed: 10/18/2022]
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10
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Recent advances of innovative and high-efficiency stationary phases for chromatographic separations. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116647] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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11
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Wang M, Liu Y, Liu Y, Xia Z. MOFs and PDA-supported immobilization of BSA in open tubular affinity capillary electrochromatography: Prediction and study on drug-protein interactions. Talanta 2022; 237:122959. [PMID: 34736684 DOI: 10.1016/j.talanta.2021.122959] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 12/13/2022]
Abstract
Owing to the satisfactory properties such as high specific surface area, finely tunable chemical composition, large yet adjustable pore sizes, and diverse architecture, metal-organic frameworks (MOFs) have the potential to be used as a stable, efficient, reusable and protective biomacromolecule immobilization carrier in capillary electrophoresis. Herein, a novel immobilized receptor open-tubular affinity capillary electrochromatography (OT-ACEC) strategy was developed for the first time to rapidly investigate the interactions between a set of drugs and bovine serum albumin (BSA). To further increase the amount of immobilized BSA and maintain the bioactivity of BSA, BSA was immobilized on the inner capillary surface by using polydopamine (PDA) as the adhesion layer and surface functionalization agent, a MOF namely dresden university of technology-5 (DUT-5) as supporting platform and biomacromolecule immobilization carrier, respectively. The amount of immobilized BSA on the capillary surface of the BSA@capillary and the PDA/MOFs/BSA@capillary column are separately calculated as 0.00756 nmol and 0.01812 nmol. Besides, the PDA/MOFs/BSA@capillary column was applied to investigate the interactions between BSA and flavonoids, fluoroquinolones. Under the optimal interaction conditions, three flavonoids and three fluoroquinolones are able to achieve baseline separation in the PDA/MOFs/BSA@capillary column (with resolution values of three flavonoids, 5.78 and 4.13; three fluoroquinolones, 1.72 and 1.68). The PDA/MOFs/BSA@capillary column shows good stability and reproducibility over 100 runs (relative standard deviation (RSD)<5%). In addition, the normalized capacity factor (KRCE) in this method replaced the binding constant and was used as an evaluation index to fast predict the activities of 20 drugs, some of which have not yet been reported for their interactions with BSA. Spectroscopy and molecular docking further illuminated the binding mechanism.
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Affiliation(s)
- Min Wang
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China
| | - Yi Liu
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China; Chongqing Chemical Industry Vocational College, Chongqing, 401228, China
| | - Yao Liu
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China
| | - Zhining Xia
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China.
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12
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13
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Preparation and evaluation of chiral open-tubular columns supported with zeolite silica nanoparticles and single/dual chiral selectors using capillary electrochromatography with amperometric detection. J Chromatogr A 2021; 1651:462298. [PMID: 34111678 DOI: 10.1016/j.chroma.2021.462298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 05/21/2021] [Accepted: 05/23/2021] [Indexed: 11/22/2022]
Abstract
In this work, novel stationary phase coatings by zeolite SiO2NPs coupled with β-cyclodextrin (β-CD) or β-CD/L-phenylalanine were developed for chiral open-tubular capillary electrochromatography (OT-CEC). The OT columns were prepared taking advantage of the strong adhesion of polydopamine in one-step method. Scanning electron micrography and electroosmotic flow were used to characterize the prepared single/dual-selector OT columns. Chiral separation of four chiral analytes (catechin/epicatechin, ephedrine/pseudoephedrine, ritodrine and salbutamol) was carried out in order to evaluate the performance of the prepared columns in OT-CEC with amperometric detection system. In terms of migration time, peak area, resolution, and selectivity factor of catechin/epicatechin and salbutamol, the run-to-run, day-to-day, and column-to-column repeatability were within 8.9%. Under the optimum conditions, the developed methods were applied for the analyses of Chinese herbal medicine Catechu herbs and salbutamol aerosol samples.
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14
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In situ room-temperature preparation of a covalent organic framework as stationary phase for high-efficiency capillary electrochromatographic separation. J Chromatogr A 2021; 1649:462239. [PMID: 34034110 DOI: 10.1016/j.chroma.2021.462239] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 04/19/2021] [Accepted: 05/05/2021] [Indexed: 02/07/2023]
Abstract
Covalent organic frameworks (COFs), considered as a series of newly emerging porous organic materials, have been widely utilized in separation fields. Herein, a novel COF (TFPB-BD) was first employed as stationary phase for high-efficiency capillary electrochromatographic separation. Benzidine (BD) and 1,3,5-Tris-(4-formylphenyl)benzene (TFPB) were selected as organic linkers and then introduced into the aldehyde group modified capillary for the in situ growth of TFPB-BD onto the capillary inner wall at room temperature. The morphology and formation of TFPB coated capillary column were confirmed by a variety of tools including Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS). It's interesting that the TFPB globular crystals with nanoscale were uniformly and densely modified on the capillary inner surface. Hence, the prepared column exhibited prominent separation performance for the test analytes including alkylbenzenes, chlorobenzenes and phenolic compounds with high efficiency and high resolution. The maximum column efficiency can reach about 1.8 × 105 plates•m-1. Additionally, the high resolutions of anilines, amino acids and parabens were also achieved on the TFPB modified capillary. The precisions (RSDs) of the retention times of alkylbenzenes of intra-day runs (n = 3), inter-day runs (n = 3) and parallel columns (n = 3) were all less than 2.83%. This innovative COF-based stationary phase gives great promise for the chromatographic separation field.
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Zhao B, Yang S, Deng J, Pan K. Chiral Graphene Hybrid Materials: Structures, Properties, and Chiral Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:2003681. [PMID: 33854894 PMCID: PMC8025009 DOI: 10.1002/advs.202003681] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/14/2020] [Indexed: 05/02/2023]
Abstract
Chirality has become an important research subject. The research areas associated with chirality are under substantial development. Meanwhile, graphene is a rapidly growing star material and has hard-wired into diverse disciplines. Rational combination of graphene and chirality undoubtedly creates unprecedented functional materials and may also lead to great findings. This hypothesis has been clearly justified by the sizable number of studies. Unfortunately, there has not been any previous review paper summarizing the scattered studies and advancements on this topic so far. This overview paper attempts to review the progress made in chiral materials developed from graphene and their derivatives, with the hope of providing a systemic knowledge about the construction of chiral graphenes and chiral applications thereof. Recently emerging directions, existing challenges, and future perspectives are also presented. It is hoped this paper will arouse more interest and promote further faster progress in these significant research areas.
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Affiliation(s)
- Biao Zhao
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing100029China
- College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Shenghua Yang
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing100029China
- College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Jianping Deng
- State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing100029China
- College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Kai Pan
- College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
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16
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Facile preparation of ethanediamine-β-cyclodextrin modified capillary column for electrochromatographic enantioseparation of Dansyl amino acids. J Chromatogr A 2021; 1643:462082. [PMID: 33780884 DOI: 10.1016/j.chroma.2021.462082] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/16/2021] [Accepted: 03/13/2021] [Indexed: 01/03/2023]
Abstract
Herein, the fabrication of a fascinating multifunctional cyclodextrin (CD) chiral stationary phase and its chiral separation performance in capillary electrochromatography are proposed. A facile interfacial polymerization was used to anchor ethanediamine-β-cyclodextrin (EDA-β-CD) polymerized with trimesoyl chloride (TMC) and to form the chiral stationary phase (CSP) composite onto the surface wall of the capillary. The characters of prepared columns were confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray Photoelectron Spectrometer (XPS), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS). This novel CSP offers multi-typical interactions including hydrogen bonding, π-interaction, hydrophobic and electrostatic interaction as well as steric effects which contribute to prominent chiral recognition for Dansyl-DL-amino acids in CEC modes. The EDA-β-CD modified column showed eminent enantioseparation performance towards five Dansyl-DL-amino acids (the DL-forms of valine, threonine, leucine, phenylalanine, serine). Besides, the prepared columns were perfectly reproducible and stable. The relative standard deviations of the enantiomer retention times for intra-day (n = 5), inter-day (n = 3) runs and column-to-columns (n = 3) are below 0.54%, 1.35% and 4.89%, individually. This innovative chiral stationary phase shows a broader application view and scope in chiral recognition domain.
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17
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Cai Z, Hu X, Zong R, Wu H, Jin X, Yin H, Huang C, Xiang Y, Ye N. A graphene oxide-molybdenum disulfide composite used as stationary phase for determination of sulfonamides in open-tubular capillary electrochromatography. J Chromatogr A 2020; 1629:461487. [PMID: 32823013 DOI: 10.1016/j.chroma.2020.461487] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 11/26/2022]
Abstract
A graphene oxide-molybdenum disulfide (GO-MoS2) composite was synthesized and utilized as the highly efficient stationary phase of open-tubular capillary electrochromatography (OT-CEC). The characterization results indicated that GO-MoS2 composite was successfully synthesized. The GO-MoS2-coated capillary column was prepared by covalent immobilization method for the determination of seven sulfonamides. The baseline separation of seven sulfonamides was achieved by GO-MoS2-coated capillary column. The linear range was 0.05-100 μg/mL for sulfisomidine, sulfathiazole, sulfamerazine, phthalylsulfathiazole and sulfacetamide, 0.1-100 μg/mL for sulfamonomethoxine and sulfachloropyridazine with a satisfactory correlation coefficients (R2) > 0.9994. This developed OT-CEC method was successfully applied to determinate of seven sulfonamides in environmental water and milk samples with good recoveries of 85.77% - 109.10% and 80.03% - 109.97%, respectively. These results indicated that GO-MoS2-coated capillary column possessed good stability and repeatability.
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Affiliation(s)
- Zhimin Cai
- Department of Chemistry, Capital Normal University, Beijing, 100048, PR China
| | - Xiaoyu Hu
- Department of Chemistry, Capital Normal University, Beijing, 100048, PR China
| | - Rui Zong
- Department of Chemistry, Capital Normal University, Beijing, 100048, PR China
| | - Hanqing Wu
- College of Teacher Education, Capital Normal University, Beijing, 100048, PR China.
| | - Xiaotong Jin
- Department of Chemistry, Capital Normal University, Beijing, 100048, PR China
| | - Han Yin
- Department of Chemistry, Capital Normal University, Beijing, 100048, PR China
| | - Chuanlin Huang
- Department of Chemistry, Capital Normal University, Beijing, 100048, PR China
| | - Yuhong Xiang
- Department of Chemistry, Capital Normal University, Beijing, 100048, PR China
| | - Nengsheng Ye
- Department of Chemistry, Capital Normal University, Beijing, 100048, PR China.
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