1
|
Luo ZH, Zhu YL, Ran XY, Ma AX, Zhang Y, Zhou HM, Wang BJ, Zhang JH, Xie SM, Yuan LM. Subcomponent self-assembly construction of tetrahedral cage Fe II4L 4 for high-resolution gas chromatographic separation. Talanta 2024; 277:126388. [PMID: 38870759 DOI: 10.1016/j.talanta.2024.126388] [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: 04/17/2024] [Revised: 05/29/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
Metal organic cages (MOCs), as an emerging discrete supramolecular compounds, have received widespread attention in separation, biomedicine, gas capture, catalysis, and molecular recognition due to their porosity, adjustability and stability. Herein, we present a new chiral MOC FeII4L4 coated capillary column prepared for gas chromatographic (GC) separation of different types of organic compounds, including n-alkanes, n-alcohols, alkylbenzenes, isomers, especially for racemic compounds. There are 20 different kinds of racemates (e.g., alcohols, ethers, epoxides, esters, alkenes, and aldehydes) were well resolved on the FeII4L4 chiral column and a maximum resolution value for 1-phenyl-1-propanol reaches 6.17. The FeII4L4 coated column exhibited high column efficiency (3100 plates m-1 for n-dodecane) and good enantiomeric resolution complementary to that of a commercial β-DEX 120 column and the previously reported chiral MOC [Fe4L6] (ClO4)8 coated column. The relative standard deviation (RSDs) of the peak area and retention time of glycidol and nitrotoluene were below 1.2 %. This study reveals that chiral MOCs have good application prospects in chromatographic separation.
Collapse
Affiliation(s)
- Zong-Hong Luo
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| | - Yu-Lan Zhu
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| | - Xiao-Yan Ran
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| | - An-Xu Ma
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| | - Yue Zhang
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| | - Hong-Mei Zhou
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| | - Bang-Jin Wang
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| | - Jun-Hui Zhang
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| | - Sheng-Ming Xie
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China.
| | - Li-Ming Yuan
- Department of Chemistry, Yunnan Normal University, Kunming, 650500, PR China
| |
Collapse
|
2
|
Mu Q, Tian W, Zhang J, Li R, Ji Y. Nanocrystalline Porous Materials for Chiral Separation: Synthesis, Mechanisms, and Applications. Anal Chem 2024; 96:7864-7879. [PMID: 38320090 DOI: 10.1021/acs.analchem.3c01178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Affiliation(s)
- Qixuan Mu
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China
- Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, Nanjing 210009, China
| | - Wanting Tian
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China
- Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, Nanjing 210009, China
| | - Jiale Zhang
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China
- Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, Nanjing 210009, China
| | - Ruijun Li
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China
- Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, Nanjing 210009, China
| | - Yibing Ji
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China
- Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, Nanjing 210009, China
| |
Collapse
|
3
|
Yasmeen F, Yunus U, Bhatti MH, Sher M, Nadeem M. The development of chiral metal-organic frameworks for enantioseparation of racemates. RSC Adv 2023; 13:16651-16662. [PMID: 37274410 PMCID: PMC10236271 DOI: 10.1039/d3ra02489j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/17/2023] [Indexed: 06/06/2023] Open
Abstract
MIL-101(Cr), an achiral metal-organic framework, made up of a terephthalic acid ligand and a metal chromium ion was selected as a template. Its structural features are unsaturated Lewis acid sites that can be easily activated and it has an extremely high specific surface area, big pore size, and good thermal/chemical/water stability. This achiral framework was modified to introduce chirality within the structure to develop chiral metal-organic frameworks (CMOFs). Here, natural chiral ligands, amino acids (l-proline, l-thioproline and l-tyrosine), were selected for post synthetic modification (PSM) of MIL-101(Cr). This is a very simple, clean and facile methodology with respect to the reactants and reaction conditions. CMOFs 1-3 abbreviated as MIL-101-l-proline (CMOF-1), MIL-101-l-thioproline (CMOF-2) and MIL-101-l-tyrosine (CMOF-3) were prepared by introducing l-proline, l-thioproline and l-tyrosine as chiral moieties within the framework of (Cr). These CMOFs were characterized by FTIR, PXRD, SEM, and thermo gravimetric analysis. Chirality within these CMOFs 1-3 was established by circular dichroism (CD) and polarimetric methods. These three CMOFs 1-3 showed enantioselectivity towards RS-ibuprofen, RS-mandelic acid and RS-1-phenylethanol to varying extents. Their enantioselectivity towards racemates was studied by chiral HPLC and polarimetry.
Collapse
Affiliation(s)
- Farzana Yasmeen
- Department of Chemistry, Allama Iqbal Open University Islamabad Pakistan +9251-9057818 +9251-5975200
| | - Uzma Yunus
- Department of Chemistry, Allama Iqbal Open University Islamabad Pakistan +9251-9057818 +9251-5975200
| | - Moazzam H Bhatti
- Department of Chemistry, Allama Iqbal Open University Islamabad Pakistan +9251-9057818 +9251-5975200
| | - Muhammad Sher
- Department of Chemistry, Allama Iqbal Open University Islamabad Pakistan +9251-9057818 +9251-5975200
| | - Muhammad Nadeem
- Department of Chemistry, Allama Iqbal Open University Islamabad Pakistan +9251-9057818 +9251-5975200
| |
Collapse
|
4
|
Huo H, Guan J, Huang Z, Long K, Zhang D, Shi S, Yan F. Preparation of β-cyclodextrin covalent organic framework-immobilized poly(glycidyl methacrylate) nanoparticle-coated open tubular capillary electrochromatography column for chiral separation. J Sep Sci 2023:e2300117. [PMID: 37246276 DOI: 10.1002/jssc.202300117] [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: 02/18/2023] [Revised: 05/07/2023] [Accepted: 05/10/2023] [Indexed: 05/30/2023]
Abstract
A new enantioselective open-tubular capillary electrochromatography was developed employing poly(glycidyl methacrylate) nanoparticles/β-cyclodextrin covalent organic frameworks chemically immobilized on the inner wall of the capillary as a stationary phase. A pretreated silica-fused capillary reacted with 3-aminopropyl-trimethoxysilane followed by poly(glycidyl methacrylate) nanoparticles and β-cyclodextrin covalent organic frameworks through a ring-opening reaction. The resulting coating layer on the capillary was characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. The electroosmotic flow was studied to evaluate the variation of the immobilized columns. The chiral separation performance of the fabricated capillary columns was validated by the analysis of the four racemic proton pump inhibitors including lansoprazole, pantoprazole, tenatoprazole, and omeprazole. The influences of bonding concentration, bonding time, bonding temperature, buffer type and concentration, buffer pH, and applied voltage on the enantioseparation of four proton pump inhibitors were investigated. Good enantioseparation efficiencies were achieved for all enantiomers. In the optimum conditions, the enantiomers of four proton pump inhibitors were fully resolved within 10 min with high resolutions of 9.5-13.9. The column-to-column and inter- to intra-day repeatability of the fabricated capillary columns through relative standard deviation were found better than 9.54%, exhibiting satisfactory stability and repeatability of the fabricated capillary columns.
Collapse
Affiliation(s)
- Hongyi Huo
- 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
| | - Ke Long
- 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
| | - Shuang Shi
- 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
| |
Collapse
|
5
|
Niu X, Yan S, Zhao R, Li H, Liu X, Wang K. Design and Electrochemical Chiral Sensing of the Robust Sandwich Chiral Composite d-His-ZIF-8@Au@ZIF-8. ACS APPLIED MATERIALS & INTERFACES 2023; 15:22435-22444. [PMID: 37126450 DOI: 10.1021/acsami.3c03947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In the pursuit of chiral materials with significant chiral recognition effects and stability, various strategies have been explored, among which the integration of metal nanoparticles and chiral metal-organic frameworks (CMOFs) is highly promising. However, metal nanoparticles (MNPs)/CMOFs show high chiral properties but inferior stabilities due to the MNPs being easily detached from the outside layer under certain conditions. Sandwich MOFs@MNPs@CMOF chiral materials can overcome this dilemma because the sandwich structure can maximize the regulation of the chiral interface activity, while the controlled outer layer can stop the MNPs from falling off in the procedure of chiral recognition. Here, a novel sandwich chiral material (d-His-ZIF-8@Au@ZIF-8) was synthesized by a ligand-assisted strategy with a well-defined sandwich morphology and chiral recognition capabilities. The electrochemical chiral recognition showed that d-His-ZIF-8@Au@ZIF-8 was the most efficient for the enantiomer of phenylalanine (Phe). This experiment presents a novel perspective for the fabrication of a chiral electrochemical sensing platform based on a solid sandwich chiral nanocomposite.
Collapse
Affiliation(s)
- Xiaohui Niu
- College of Petrochemical Technology, Lanzhou University of Technology, 730050 Lanzhou, PR China
| | - Simeng Yan
- College of Petrochemical Technology, Lanzhou University of Technology, 730050 Lanzhou, PR China
| | - Rui Zhao
- College of Petrochemical Technology, Lanzhou University of Technology, 730050 Lanzhou, PR China
| | - Hongxia Li
- College of Petrochemical Technology, Lanzhou University of Technology, 730050 Lanzhou, PR China
| | - Xiaoyu Liu
- College of Petrochemical Technology, Lanzhou University of Technology, 730050 Lanzhou, PR China
| | - Kunjie Wang
- College of Petrochemical Technology, Lanzhou University of Technology, 730050 Lanzhou, PR China
| |
Collapse
|
6
|
Liu C, Quan K, Chen J, Shi X, Qiu H. Chiral metal-organic frameworks and their composites as stationary phases for liquid chromatography chiral separation: A minireview. J Chromatogr A 2023; 1700:464032. [PMID: 37148566 DOI: 10.1016/j.chroma.2023.464032] [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: 03/03/2023] [Revised: 04/16/2023] [Accepted: 04/26/2023] [Indexed: 05/08/2023]
Abstract
Chiral metal organic frameworks (CMOFs) are a kind of crystal porous framework material that has attracted increasing attention due to the customizable combination of metal nodes and organic ligands. In particular, the highly ordered crystal structure and rich adjustable chiral structure make it a promising material for developing new chiral separation material systems. In this review, the progress of CMOFs and their different types of composites used as chiral stationary phases (CSPs) in liquid chromatography for enantioseparation are discussed. The characteristics of CMOFs and their composites are summarized, aiming to provide new ideas for the development of CMOFs with better performance and further promote the application of CMOFs materials in enantioselective high-performance liquid chromatography (HPLC).
Collapse
Affiliation(s)
- Chunqiang Liu
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kaijun Quan
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
| | - Jia Chen
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaofeng Shi
- Institute of Materia Medica, Gansu Provincial Cancer Hospital, Lanzhou 730050, China
| | - Hongdeng Qiu
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| |
Collapse
|
7
|
Zhang M, Chen J, Xu G, Yu T, Du Y. A chiral metal-organic framework synthesized by the mixture of chiral and non-chiral organic ligands for enantioseparation of drugs by open-tubular capillary electrochromatography. J Chromatogr A 2023; 1699:464029. [PMID: 37119710 DOI: 10.1016/j.chroma.2023.464029] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/01/2023]
Abstract
A chiral metal-organic framework L-Histidine-Zeolitic imidazolate framework-67 (L-His-ZIF-67) was synthesized by the mixture of chiral organic ligand L-histidine and non-chiral organic ligand 2-methylimidazole directly, and to the author's knowledge, the chiral L-His-ZIF-67 coated capillary column we prepared has still not been reported to date in the field of capillary electrophoresis. This chiral metal-organic frameworks material was used as the chiral stationary phase for enantioseparation of drugs by open-tubular capillary electrochromatography. The separation conditions such as pH value, buffer concentration and proportion of organic modifier were optimized. Under optimal conditions, the established enantioseparation system achieved good separation effect, and the resolution of five chiral drugs: esmolol (7.93), nefopam (3.03), salbutamol (2.42), scopolamine (1.08) and sotalol (0.81). In addition, the chiral recognition mechanism of L-His-ZIF-67 was elucidated by a series of mechanism experiments, and the specific interaction force was preliminarily speculated.
Collapse
Affiliation(s)
- Min Zhang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing 210009, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Jiaquan Chen
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing 210009, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Guangfu Xu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing 210009, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Tao Yu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing 210009, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
| | - Yingxiang Du
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing 210009, PR China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China.
| |
Collapse
|
8
|
Wang LJ, Han W, Lou TT, Ma LL, Xiao YB, Xu Z, Chen ML, Cheng YH, Ding L. An iron-based metal-organic framework as a novel dispersive solid-phase extraction sorbent for the efficient adsorption of tetrabromobisphenol A from environmental water samples. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:343-352. [PMID: 36594622 DOI: 10.1039/d2ay01287a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
For environmental safety, it is important to establish a simple, rapid, and sensitive method for emerging pollutants. Here, a dispersive solid-phase extraction (d-SPE) method based on an iron-based metal-organic framework (Fe-MIL-88-NH2) combined with high-performance liquid chromatography (HPLC) was developed for tetrabromobisphenol A (TBBPA) in water samples. Fe-MIL-88-NH2 was synthesized using a solvothermal method and completely characterized. Fe-MIL-88-NH2 had good water stability and gave a maximum adsorption capacity of 40.97 mg g-1 for TBBPA. The adsorption of TBBPA on Fe-MIL-88-NH2 followed Langmuir adsorption models and a pseudo-second-order kinetic model. The bromine ion and the hydroxyl group of TBBPA could form strong hydrogen bond interactions with the amino protons around the cavity of Fe-MIL-88-NH2, which was in accord with the molecular simulation calculations. Furthermore, several important d-SPE parameters were optimized, such as the amount of materials, extraction time, pH, ionic strength, elution solvent type, and volume. The established method showed good linearity in the concentration range of 0.005-100 μg g-1 (r2 ≥ 0.9996). This method's limits of detection (LOD) and quantification (LOQ) were 0.001 μg g-1 and 0.005 μg g-1, respectively. The recoveries in spiked water samples ranged from 87.5% to 104.9%. The proposed method was applied successfully to detect TBBPA in environmental water samples.
Collapse
Affiliation(s)
- Ling-Juan Wang
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, China.
| | - Wei Han
- Technical Center for Animal, Plant, Foodstuffs and Industrial Product Safety, Tianjin Customs, Tianjin 300457, China
| | - Ting-Ting Lou
- Technical Center for Animal, Plant, Foodstuffs and Industrial Product Safety, Tianjin Customs, Tianjin 300457, China
| | - Lin-Lin Ma
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, China.
| | - Ya-Bing Xiao
- Technical Center for Animal, Plant, Foodstuffs and Industrial Product Safety, Tianjin Customs, Tianjin 300457, China
| | - Zhou Xu
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, China.
| | - Mao-Long Chen
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, China.
| | - Yun-Hui Cheng
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, China.
| | - Li Ding
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, China.
| |
Collapse
|
9
|
Zhang L, Tan QG, Fan JQ, Sun C, Luo YT, Liang RP, Qiu JD. Microfluidics for chiral separation of biomolecules. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116842] [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]
|
10
|
Chromatographic supports for enantioselective liquid chromatography: Evolution and innovative trends. J Chromatogr A 2022; 1684:463555. [DOI: 10.1016/j.chroma.2022.463555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 09/29/2022] [Accepted: 10/06/2022] [Indexed: 11/21/2022]
|
11
|
Li K, Xiong LX, Wang Y, Zhang YP, Wang BJ, Xie SM, Zhang JH, Yuan LM. Preparation and evaluation of a chiral porous organic cage based chiral stationary phase for enantioseparation in high performance liquid chromatography. J Chromatogr A 2022; 1679:463415. [PMID: 35977455 DOI: 10.1016/j.chroma.2022.463415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/07/2022] [Accepted: 08/08/2022] [Indexed: 11/19/2022]
Abstract
Porous organic cages (POCs) are a new kind of porous molecular materials, which have gained widespread interest in many fields due to their intriguing properties, including excellent molecular solubility, inherent molecular cavity and rich host-guest chemistry. To date, many chiral POCs have been explored as chiral stationary phases (CSPs) for gas chromatographic (GC) separation of enantiomers. However, the applications of chiral POCs for high performance liquid chromatography (HPLC) enantiomeric separation is extremely rare. In this study, we report the construction of thiol-ene click reaction for the preparation of CSP for HPLC by using a [4+8]-type chiral POC NC4-R as chiral selector. The fabricated CSP showed good chiral resolution performance not only in normal-phase HPLC (NP-HPLC) but also in reversed-phase HPLC (RP-HPLC). Seventeen and ten racemates were well resolved in the two separation modes, respectively, including ketones, esters, alcohols, phenols, amines, ethers, organic acids, and amino acids. Moreover, the fabricated column also shows good chiral recognition complementarity to two popular chiral HPLC columns (Chiralpak AD-H and Chiralcel OD-H columns) and previously reported chiral POC NC1-R-based HPLC column, which can resolve some racemates that unable to be resolved by the two commercially available chiral HPLC columns and NC1-R-based column. The relative standard deviation (RSD) values (n = 4) of retention time and resolution (Rs) of analytes separated on the column were less than 0.3 % and 0.5 % after it was subjected to different injections, showing the good reproducibility and stability of the NC4-R-based column. This work demonstrated high potentials of chiral POCs for HPLC enantioseparation and the applicability of chiral POC-based HPLC columns can be broadened by developing more chiral POCs with diverse structures as chiral selector for HPLC.
Collapse
Affiliation(s)
- Kuan Li
- Department of Chemistry, Yunnan Normal University, Kunming 650500, P.R. China
| | - Ling-Xiao Xiong
- Department of Chemistry, Yunnan Normal University, Kunming 650500, P.R. China
| | - Ying Wang
- Department of Chemistry, Yunnan Normal University, Kunming 650500, P.R. China
| | - You-Ping Zhang
- Department of Chemistry, Yunnan Normal University, Kunming 650500, P.R. China
| | - Bang-Jin Wang
- Department of Chemistry, Yunnan Normal University, Kunming 650500, P.R. China
| | - Sheng-Ming Xie
- Department of Chemistry, Yunnan Normal University, Kunming 650500, P.R. China.
| | - Jun-Hui Zhang
- Department of Chemistry, Yunnan Normal University, Kunming 650500, P.R. China.
| | - Li-Ming Yuan
- Department of Chemistry, Yunnan Normal University, Kunming 650500, P.R. China
| |
Collapse
|
12
|
Chen Y, Xia L, Li G. The progress on porous organic materials for chiral separation. J Chromatogr A 2022; 1677:463341. [PMID: 35870277 DOI: 10.1016/j.chroma.2022.463341] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 07/02/2022] [Accepted: 07/12/2022] [Indexed: 11/25/2022]
Abstract
Chiral compounds have similar structures and properties, but their pharmacological action is very different or even opposite. Therefore, the separation of chiral compounds has great significance in pharmaceutical and agriculture. Porous organic materials are novel crystalline porous materials, which possess high surface area, controllable pore size, and favorable functionalization. Therefore, porous organic materials are considered to be an ideal material for chiral separation. In this review, we summarized the progress of chiral porous organic materials for chiral separation in recent years. Furthermore, the applications of chiral porous organic materials as chiral separation medias (chromatography stationary phases and membrane materials) in enantioseparation were highlighted. Finally, the remaining challenges and future directions for porous organic materials in chiral separation were also briefly outlined further to promote the development of porous organic materials in chiral separation.
Collapse
Affiliation(s)
- Yanlong Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China; School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, China
| | - Ling Xia
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, China
| | - Gongke Li
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, China.
| |
Collapse
|
13
|
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: 1] [Impact Index Per Article: 0.5] [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.
Collapse
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
| |
Collapse
|
14
|
Chiral phenethylamine synergistic tricarboxylic acid modified β-cyclodextrin immobilized on porous silica for enantioseparation. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.06.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
15
|
He N, Li Z, Hu C, Chen Z. In situ synthesis of a spherical covalent organic framework as a stationary phase for capillary electrochromatography. J Pharm Anal 2022; 12:610-616. [PMID: 36105161 PMCID: PMC9463497 DOI: 10.1016/j.jpha.2022.06.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 06/12/2022] [Accepted: 06/15/2022] [Indexed: 11/25/2022] Open
Abstract
Covalent organic frameworks (COFs) are a novel type of crystalline porous organic polymer materials recently developed. It has several advantages in chromatographic separation field, such as high thermal stability, porosity, structural regularity, and large specific surface area. Here, a novel spherical COF 1,3,5-tris(4-aminophenyl)benzene (TAPB) and 2,5-bis(2-propyn-1-yloxy)-1,4-benzenedicarboxaldehyde (BPTA) was developed as an electrochromatographic stationary phase for capillary electrochromatography separation. The COF TAPB-BPTA modified capillary column was fabricated via a facile in situ growth method at room temperature. The characterization results of scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and X-ray diffraction (XRD) confirmed that COF TAPB-BPTA were successfully modified onto the capillary inner surface. The electrochromatography separation performance of the COF TAPB-BPTA modified capillary was investigated. The prepared column demonstrated outstanding separation performance toward alkylbenzenes, phenols, and chlorobenzenes compounds. Furthermore, the baseline separations of non-steroidal anti-inflammatory drugs (NSAIDs) and parabens with good efficiency and high resolution were achieved. Also, the prepared column possessed satisfactory precision of the intra-day runs (n = 5), inter-day runs (n = 3), and parallel columns (n = 3), and the relative standard deviations (RSDs) of the retention times of tested alkylbenzenes were all less than 2.58%. Thus, this new COF-based stationary phase shows tremendous application potential in chromatographic separation field. COF TAPB–BPTA was studied as OT-CEC stationary phase. In situ, room-temperature growth method was quite facile and efficient. Excellent separation performances toward various hydrophobic compounds. The maximum column efficiency was 1.78 × 105 plates/m. Reproducibility and stability were found to be satisfactory.
Collapse
|
16
|
Zhu C, Yang K, Wang H, Fang Y, Feng L, Zhang J, Xiao Z, Wu X, Li Y, Fu Y, Zhang W, Wang KY, Zhou HC. Enantioseparation in Hierarchically Porous Assemblies of Homochiral Cages. ACS CENTRAL SCIENCE 2022; 8:562-570. [PMID: 35647277 PMCID: PMC9136985 DOI: 10.1021/acscentsci.1c01571] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Indexed: 05/17/2023]
Abstract
Efficient enantioselective separation using porous materials requires tailored and diverse pore environments to interact with chiral substrates; yet, current cage materials usually feature uniform pores. Herein, we report two porous assemblies, PCC-60 and PCC-67, using isostructural octahedral cages with intrinsic microporous cavities of 1.5 nm. The PCC-67 adopts a densely packed mode, while the PCC-60 is a hierarchically porous assembly featuring interconnected 2.4 nm mesopores. Compared with PCC-67, the PCC-60 demonstrates excellent enantioselectivity and recyclability in separating racemic diols and amides. This solid adsorbent PCC-60 is further utilized as a chiral stationary phase for high-performance liquid chromatography (HPLC), enabling the complete separation of six valuable pharmaceutical intermediates. According to quantitative dynamic experiments, the hierarchical pores facilitate the mass transfer within the superstructure, shortening the equilibrium time for adsorbing chiral substrates. Notably, this hierarchically porous material PCC-60 indicates remarkably higher enantiomeric excess (ee) values in separating racemates than PCC-67 with uniform microporous cavities. Control experiments confirm that the presence of mesopores enables the PCC-60 to separate bulky substrates. These results uncover the traditionally underestimated role of hierarchical porosity in porous-superstructure-based enantioseparation.
Collapse
Affiliation(s)
- Chengfeng Zhu
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Keke Yang
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Hongzhao Wang
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Yu Fang
- State
Key Laboratory for Chemo/Bio-Sensing and Chemometrics, College of
Chemistry and Chemical Engineering, Hunan
University, Changsha, Hunan 410082, P. R. China
| | - Liang Feng
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Jiaqi Zhang
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Zhifeng Xiao
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Xiang Wu
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Yougui Li
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Yanming Fu
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Wencheng Zhang
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, P. R. China
| | - Kun-Yu Wang
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Hong-Cai Zhou
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
- Department
of Materials Science and Engineering, Texas
A&M University, College Station, Texas 77843-3003, United States
| |
Collapse
|
17
|
Gao L, Xing Z, Zhang S, Lin X, Qin S, Chu H, Tang Y, Zhao X. Simultaneous Enantioseparation and Rapid Determination of Atenolol and Amlodipine Besylate by Capillary Electrochromatography. Chromatographia 2022. [DOI: 10.1007/s10337-022-04141-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
18
|
Căta L, Terenti N, Cociug C, Hădade ND, Grosu I, Bucur C, Cojocaru B, Parvulescu VI, Mazur M, Čejka J. Sonogashira Synthesis of New Porous Aromatic Framework-Entrapped Palladium Nanoparticles as Heterogeneous Catalysts for Suzuki-Miyaura Cross-Coupling. ACS APPLIED MATERIALS & INTERFACES 2022; 14:10428-10437. [PMID: 35171567 DOI: 10.1021/acsami.1c24429] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Palladium nanoparticles entrapped in porous aromatic frameworks (PAFs) or covalent organic frameworks may promote heterogeneous catalytic reactions. However, preparing such materials as active nanocatalysts usually requires additional steps for palladium entrapment and reduction. This paper reports as a new approach, a simple procedure leading to the self-entrapment of Pd nanoparticles within the PAF structure. Thus, the selected Sonogashira synthesis affords PAF-entrapped Pd nanoparticles that can catalyze the C-C Suzuki-Miyaura cross-coupling reactions. Following this new concept, PAFs were synthesized via Sonogashira cross-coupling of the tetraiodurated derivative of tetraphenyladamantane or spiro-9,9'-bifluorene with 1,6-diethynylpyrene, then characterized them using powder X-ray diffraction, diffuse reflectance infrared Fourier transform spectroscopy, X-ray photoelectron spectroscopy, high-resolution scanning transmission electron microscopy, and textural properties (i.e., adsorption-desorption isotherms). The PAF-entrapped Pd nanocatalysts showed high catalytic activity in Suzuki-Miyaura coupling reactions (demonstrated by preserving the turnover frequency values) and stability (demonstrated by palladium leaching and recycling experiments). This new approach presents a new class of PAFs with unique structural, topological, and compositional complexities as entrapped metal nanocatalysts or for other diverse applications.
Collapse
Affiliation(s)
- Lidia Căta
- Faculty of Chemistry and Chemical Engineering, Department of Chemistry and SOOMCC, Babes-Bolyai University, 11, Arany Janos str., Cluj-Napoca, 400028 Cluj, Romania
| | - Natalia Terenti
- Faculty of Chemistry and Chemical Engineering, Department of Chemistry and SOOMCC, Babes-Bolyai University, 11, Arany Janos str., Cluj-Napoca, 400028 Cluj, Romania
| | - Cristina Cociug
- Faculty of Chemistry and Chemical Engineering, Department of Chemistry and SOOMCC, Babes-Bolyai University, 11, Arany Janos str., Cluj-Napoca, 400028 Cluj, Romania
| | - Niculina Daniela Hădade
- Faculty of Chemistry and Chemical Engineering, Department of Chemistry and SOOMCC, Babes-Bolyai University, 11, Arany Janos str., Cluj-Napoca, 400028 Cluj, Romania
| | - Ion Grosu
- Faculty of Chemistry and Chemical Engineering, Department of Chemistry and SOOMCC, Babes-Bolyai University, 11, Arany Janos str., Cluj-Napoca, 400028 Cluj, Romania
| | - Cristina Bucur
- National Institute of Materials Physics, 405 Atomiştilor Str., Măgurele 077125, Ilfov, Romania
| | - Bogdan Cojocaru
- Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, Regina Elisabeta Blvd., no. 4-12, Bucharest 030016, Romania
| | - Vasile I Parvulescu
- Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, Regina Elisabeta Blvd., no. 4-12, Bucharest 030016, Romania
| | - Michal Mazur
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, Prague 128 43, Czech Republic
| | - Jiří Čejka
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, Prague 128 43, Czech Republic
| |
Collapse
|
19
|
Metal-organic frameworks as stationary phases for chromatography and solid phase extraction: A review. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214364] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
20
|
Hou B, Li Z, Kang X, Jiang H, Cui Y. Recent Advances of Covalent Organic Frameworks for Chiral Separation. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-1490-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
21
|
Zhu C, Zhang AM, Li Y, Li HX, Qian Y, Fu Y, Wu X, Li Y. A biomimetic metal–organic framework with cuboid inner cavities for enantioselective separation. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00152g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A biomimetic metal–organic framework with cuboid inner cavities and multiple recognition sites was constructed from a phenylalanine-derived ligand. It can enantioselectively separate various racemic alcohols, diols and epoxides with ee up to 99.5%.
Collapse
Affiliation(s)
- Chengfeng Zhu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - A-Mei Zhang
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Ying Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Han-Xue Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Yijian Qian
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Yanming Fu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Xiang Wu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| | - Yougui Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
| |
Collapse
|
22
|
Fabrication of carbonyl-functional hypercrosslinked polymers as solid-phase extraction sorbent for enrichment of chlorophenols from water, honey and beverage samples. Mikrochim Acta 2021; 189:21. [PMID: 34878596 DOI: 10.1007/s00604-021-05123-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/01/2021] [Indexed: 10/19/2022]
Abstract
Three carbonyl-functional novel hypercrosslinked polymers (HCP-TPS, HCP-TPA, and HCP-TPP) were successfully fabricated through an one-step Friedel-Crafts acylation reaction by copolymerizing paraphthaloyl chloride with triphenylsilane, triphenylamine, and triphenylphosphine, respectively. The resultant HCPs contained plenty of carbonyl-functional groups. Among the series of such HCPs, HCP-TPS displayed the best adsorption capability to chlorophenols (CPs), and thus it was employed as solid-phase extraction (SPE) adsorbent for enrichment of chlorophenols from water, honey, and white peach beverage prior to determination by high-performance liquid chromatography. Under the optimal conditions, the detection limits of the method (S/N = 3) were 0.15-0.3 ng mL-1 for tap water and leak water, 2.5-6.0 ng g-1 for honey sample and 0.4-0.6 ng mL-1 for white peach beverage sample. The recoveries of CPs in the spiked water, honey samples, and white peach beverage were in the range of 89.0-108.4%, 81.4-118.2%, and 85.0-113.5%, respectively. This work provides a new strategy for constructing functionalized HCPs as efficient SPE adsorbents. In this work, three novel hypercrosslinked polymers (HCPs) were synthesized by the Friedel-Crafts alkylation reaction (paraphthaloyl chloride as the alkylating agent, triphenylsilane, triphenylamine, and triphenylphosphine as the aromatic units). Then, HCP-TPS was applied to soild-phase extraction sorbent for enrichment CPs from water, honey, and white peach beverage samples.
Collapse
|
23
|
Ikai T, Okuda S, Yashima E. Macromolecular helicity induction and static helicity memory of poly(biphenylylacetylene)s bearing aromatic pendant groups and their use as chiral stationary phases for high-performance liquid chromatography. Chirality 2021; 34:306-316. [PMID: 34839544 DOI: 10.1002/chir.23399] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 12/28/2022]
Abstract
Two novel poly(biphenylylacetylene)s (PBPAs) bearing achiral alkylphenyl groups at the 4'-position of the biphenyl pendant through ester linkers with different sequences were synthesized by the rhodium-catalyzed polymerization of the corresponding monomers. The influence of the alkylphenyl pendants and the ester sequences on the macromolecular helicity induction and subsequent static helicity memory was investigated. In addition, the chiral recognition ability as chiral stationary phases for high-performance liquid chromatography of the helicity-memorized PBPAs was also examined. Both polymers formed almost perfect right- and left-handed helical conformations through noncovalent chiral interactions with enantiomeric alcohols, and their induced macromolecular helicities were completely retained ("memorized") after removal of the helix inducer. A PBPA bearing a 4-n-butylphenoxycarbonyl pendant group with a static helicity memory showed a remarkably high chiral recognition ability toward a wide variety of chiral aromatics, including simple point chiral compounds, axially chiral biaryls, a chiral spiro compound, helicenes, and planar chiral cyclophanes, particularly under the reversed-phase conditions.
Collapse
Affiliation(s)
- Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Shogo Okuda
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
| |
Collapse
|
24
|
Zhang JH, Xie SM, Yuan LM. Recent progress in the development of chiral stationary phases for high-performance liquid chromatography. J Sep Sci 2021; 45:51-77. [PMID: 34729907 DOI: 10.1002/jssc.202100593] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 12/20/2022]
Abstract
Separations and analyses of chiral compounds are important in many fields, including pharmaceutical production, preparation of chemical intermediates, and biochemistry. High-performance liquid chromatography using a chiral stationary phase is regarded as one of the most valuable methods for enantiomeric separation and analysis because it is highly efficient, is broadly applicable, and has powerful separation capability. The focus for development of this method is the identification of novel chiral stationary phases with superior recognition performance and good stability. The present article reviews recent progress in the development of new chiral stationary phases for high-performance liquid chromatography between January 2018 and June 2021. These newly reported chiral stationary phases are divided into three categories: small organic molecule-based (cyclodextrin and its derivatives, macrocyclic antibiotics, cinchona alkaloids, and other low molecular weight chiral molecules), macromolecule-based (cellulose and amylose derivatives, chitin and chitosan derivatives, and synthetic helical polymers) and chiral porous material-based (chiral metal-organic frameworks, chiral covalent organic frameworks, and chiral inorganic mesoporous silicas). Each type of chiral stationary phase is discussed in detail.
Collapse
Affiliation(s)
- Jun-Hui Zhang
- Department of Chemistry, Yunnan Normal University, Kunming, P. R. China
| | - Sheng-Ming Xie
- Department of Chemistry, Yunnan Normal University, Kunming, P. R. China
| | - Li-Ming Yuan
- Department of Chemistry, Yunnan Normal University, Kunming, P. R. China
| |
Collapse
|
25
|
Structural Characteristics and Environmental Applications of Covalent Organic Frameworks. ENERGIES 2021. [DOI: 10.3390/en14082267] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Covalent organic frameworks (COFs) are emerging crystalline polymeric materials with highly ordered intrinsic and uniform pores. Their synthesis involves reticular chemistry, which offers the freedom of choosing building precursors from a large bank with distinct geometries and functionalities. The pore sizes of COFs, as well as their geometry and functionalities, can be pre-designed, giving them an immense opportunity in various fields. In this mini-review, we will focus on the use of COFs in the removal of environmentally hazardous metal ions and chemicals through adsorption and separation. The review will introduce basic aspects of COFs and their advantages over other purification materials. Various fabrication strategies of COFs will be introduced in relation to the separation field. Finally, the challenges of COFs and their future perspectives in this field will be briefly outlined.
Collapse
|