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Gambhir D, Kumar K, Murugesan P, Yadav A, Sinha Ray S, Koner RR. Amino Acid-Based Molecular and Membranous Chiral Tools for Enantiomeric Recognition. Langmuir 2024; 40:2745-2753. [PMID: 38279959 DOI: 10.1021/acs.langmuir.3c03396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2024]
Abstract
Given the need, both academic and industrial, for new approaches and technologies for chiral discrimination of enantiomers, the present work demonstrates the development through rational design and integration of two new chiral platforms (molecular and membranous) for enantioselective recognition through visual as well as microscopic observation. The molecular platform (TPT) is based on the tryptophan derivative developed through the condensation of two tryptophan units with terepthaloyl chloride. While TPT based on l-tryptophan recognizes R-mandelic acid over the S-isomer, the host with reverse chirality (TPDT) recognizes S-mandelic acid over R-isomer. The role of chemical functionality in this sensitive recognition process was established experimentally by developing an analogue of TPT and by judiciously using different chiral analytes. Importantly, a detailed theoretical study at the molecular level revealed the U-shaped conformation of TPT, creating a cavity for accommodating a chiral guest with selective functional interaction resulting in the discrimination of enantiomers. Finally, a chiral polymeric mat of poly(methyl methacrylate) (PMMA)/polyacrylonitrile (PAN) (2:3) impregnated with TPT was developed via electrospinning. The resulting fibrous mat was successfully utilized for chiral recognition through microscopic and architectural observation. Hence, the present work reports simple chiral tools for enantiomeric recognition.
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Affiliation(s)
- Diksha Gambhir
- School of Chemical Sciences, Indian Institute of Technology, Mandi, Mandi 175075, Himachal Pradesh, India
| | - Krishan Kumar
- School of Chemical Sciences, Indian Institute of Technology, Mandi, Mandi 175075, Himachal Pradesh, India
| | - Premkumar Murugesan
- School of Mechanical and Materials Engineering, Indian Institute of Technology, Mandi, Mandi 175075, Himachal Pradesh, India
| | - Arti Yadav
- School of Chemical Sciences, Indian Institute of Technology, Mandi, Mandi 175075, Himachal Pradesh, India
| | - Sumit Sinha Ray
- Department of Textile and Fibre Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| | - Rik Rani Koner
- School of Mechanical and Materials Engineering, Indian Institute of Technology, Mandi, Mandi 175075, Himachal Pradesh, India
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2
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Dehghani Z, Akhond M, Hormozi Jangi SR, Absalan G. Highly sensitive enantioselective spectrofluorimetric determination of R-/S-mandelic acid using l-tryptophan-modified amino-functional silica-coated N-doped carbon dots as novel high-throughput chiral nanoprobes. Talanta 2024; 266:124977. [PMID: 37487268 DOI: 10.1016/j.talanta.2023.124977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 07/12/2023] [Accepted: 07/19/2023] [Indexed: 07/26/2023]
Abstract
Amino-functional silica-coated N-doped carbon dots (NH2-SiO2-CDs) were covalently modified by l-tryptophan (chiral selector) by producing an amide bond between carboxyl groups of L-try and amino groups of NH2-SiO2-CDs to develop a novel high throughput chiral nanoprobes (L-try-CONH-SiO2-CDs) for highly sensitive and enantioselective quantification of S-/R-mandelic acid (S-/R-Man). The method showed a great difference between S- and R-isomers (enantioselectivity coefficient = 4.17) due to the ultra-stability of the Meisenheimer complex that was formed between S-isomer and nanoprobe (KS-Man/KR-man = 2122.7, where K is the binding-constant). At optimal experimental conditions, two linear ranges of 0.5-25.0 (LOD of 0.05 μM) and 0.5-22.0 μM (LOD of 0.27 μM) for S- and R-Man, respectively, along with an enhanced sensitivity toward S-isomer (about 5.7-fold higher than R-isomer) were attained. High selectivity for the determination of mandelic acid was achieved compared to metal ions, amino acids, and sugars that commonly coexist with it. Intra-day as well as inter-day assays, respectively, showed RSD values of about 3.2 and 3.9%. The mechanistic studies were performed for proving the enantioselective behavior of the developed nanoprobe. The method was then used for S-/R-mandelic acid determination in bio-samples. The figures of merit for the method were found to be better than those already reported for enantioselective detection of R-/S-Man.
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Affiliation(s)
- Zahra Dehghani
- Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran
| | - Morteza Akhond
- Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran.
| | - Saeed Reza Hormozi Jangi
- Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran
| | - Ghodratollah Absalan
- Massoumi Laboratory, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran.
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3
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Karimian M, Dashtian K, Zare-Dorabei R. Microfluidic chip and chiroptical gold nanoparticle-based colorimetric sensor for enantioselective detection of L-tryptophan. Talanta 2024; 266:125138. [PMID: 37657378 DOI: 10.1016/j.talanta.2023.125138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 08/25/2023] [Accepted: 08/28/2023] [Indexed: 09/03/2023]
Abstract
Herein, we introduce a novel integrated system that merges an enantio-discriminative bio-MOF-packed centrifugal microfluidic chip made from PDMS with a user-friendly on-site colorimetric sensor. This innovative approach enables the precise enantioselective recognition of L-tryptophane (L-Trp). This chiral recognition probe was successfully synthesized through meticulous control of nano-ovals-shaped gold nanoparticles morphology and surface passivation. The operational factor of this methodology was optimized to ensure simplicity, practicality, and efficiency. This optimization led to reduced reagent consumption and instantaneous analytical feedback. The integrated system was effectively applied for enantioselective separation and quantification of L-Trp across an extensive linear range of 50 μM-1.5 mM, impressive limit of detection as low as 15 μM. It is noteworthy that this integrated system demonstrated desirable selectivity even in the presence of similar biomolecules, showcasing its robust performance and rapid detection capability. Further extended the application of this strategy to exceptional performance across enantioselective sensing of L-Trp in various sample matrices, comprising bovine serum albumin, bovine milk, blood plasma and urine samples. This integrated microfluidic sample pretreatment, chiroptical sensing, and on-site signal recording with a smartphone hold tremendous potential for widespread implementation, practical applications engaging healthcare and environmental, food safety, and point-of-needs analysis, facilitating successive solution mixing and colorimetric detection.
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Affiliation(s)
- Mahsa Karimian
- Research Laboratory of Spectrometry & Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Kheibar Dashtian
- Research Laboratory of Spectrometry & Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran.
| | - Rouholah Zare-Dorabei
- Research Laboratory of Spectrometry & Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran.
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4
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Liao X, Wu B, Li H, Zhang M, Cai M, Lang B, Wu Z, Wang F, Sun J, Zhou P, Chen H, Di D, Ren C, Zhang H. Fluorescent/Colorimetric Dual-Mode Discriminating Gln and Val Enantiomers Based on Carbon Dots. Anal Chem 2023; 95:14573-14581. [PMID: 37729469 DOI: 10.1021/acs.analchem.3c01854] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Discrimination and quantification of amino acid (AA) enantiomers are particularly important for diagnosing and treating diseases. Recently, dual-mode probes have gained a lot of research interest because they can catch more detecting information compared with the single-mode probes. Thus, it is of great significance to develop a dual-mode sensor realizing AA enantiomer discrimination conveniently and efficiently. In this work, carbon dot L-TCDs were prepared by N-methyl-1,2-benzenediamine dihydrochloride (OTD) and l-tryptophan. With the assistance of H2O2, L-TCDs show an excellent discrimination performance for enantiomers of glutamine (Gln) and valine (Val) in both fluorescent and colorimetric modes. The fluorescence enantioselectivity of Gln (FD/FL) and Val (FL/FD) is 5.29 and 4.13, respectively, and the colorimetric enantioselectivity of Gln (ID/IL) and Val (IL/ID) is 13.26 and 3.42, individually. The chiral recognition mechanism of L-TCDs was systematically studied. L-TCDs can be etched by H2O2, and the participation of AA enantiomers results in different amounts of the released OTD, which provides fluorescent and colorimetric signals for identifying and quantifying the enantiomers of Gln and Val. This work provides a more convenient and flexible dual-mode sensing strategy for discriminating AA enantiomers, which is expected to be of great value in facile and high-throughput chiral recognition.
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Affiliation(s)
- Xuan Liao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Bingyan Wu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Haixia Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Mengtao Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Muzi Cai
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Bozhi Lang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhizhen Wu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fangling Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jianong Sun
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Panpan Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Hongli Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Duolong Di
- 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
| | - Cuiling Ren
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Haixia Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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5
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Yang M, Wang Y, Huang L, Jiang Y, Ke Y, Chen W, Yang L, Chen L, Duan Y. A Simple and Sensitive Electrochemical Sandwich‐Like Immunosensor for Interleukin‐8 Utilizing Carbon Black as a Sensing Platform and Silver‐Ferrocene as a Signal Amplifier. ChemistrySelect 2023. [DOI: 10.1002/slct.202203909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Affiliation(s)
- Miao Yang
- Department of Stomatology Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and Science Xiangyang 441000 PR China
| | - Yongjie Wang
- Department of Stomatology Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and Science Xiangyang 441000 PR China
| | - Lingling Huang
- Department of Stomatology The First Affiliated Hospital Fujian Medical University Fuzhou 350005 PR China
| | - Yuling Jiang
- Department of Stomatology Xiangyang No.1 People's Hospital Hubei University of Medicine Xiangyang 441053 PR China
| | - Yue Ke
- Department of Stomatology Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and Science Xiangyang 441000 PR China
| | - Wenjie Chen
- Department of Stomatology Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and Science Xiangyang 441000 PR China
| | - Lei Yang
- Department of Stomatology Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and Science Xiangyang 441000 PR China
| | - Lina Chen
- Department of Stomatology Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and Science Xiangyang 441000 PR China
| | - Yanjun Duan
- Department of Stomatology Xiangyang Central Hospital Affiliated Hospital of Hubei University of Arts and Science Xiangyang 441000 PR China
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6
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Jafar-Nezhad Ivrigh Z, Fahimi-Kashani N, Morad R, Jamshidi Z, Hormozi-Nezhad MR. Toward visual chiral recognition of amino acids using a wide-range color tonality ratiometric nanoprobe. Anal Chim Acta 2022; 1231:340386. [DOI: 10.1016/j.aca.2022.340386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/26/2022] [Accepted: 09/08/2022] [Indexed: 11/01/2022]
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7
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Lin G, Zheng S, Wang W, Shen Z, Lin H, Lin R. Simple and free-labeled voltammetry determination of glioma cell. ANAL SCI. [DOI: 10.1007/s44211-022-00176-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 08/02/2022] [Indexed: 11/26/2022]
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8
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Wang Z, Yu L, Huang Y, Chen Y, Cao H. Highly sensitive determination of anesthetic drug benzocaine based on hydroxypropyl-β-cyclodextrin-carbon black nanohybrids. Anal Methods 2022; 14:900-906. [PMID: 35166277 DOI: 10.1039/d1ay02192c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Benzocaine (BZC) is a local anaesthetic drug coupled with numerous adverse effects, and thus poses a great challenge for its simple and highly sensitive detection. For resolving this issue, hydroxypropyl-β-cyclodextrin-carbon black (HP-β-CD-CB) nanohybrid that possesses the collaborative advantages of CB (e.g., excellent electrical properties, large surface area) and HP-β-CD (e.g., high molecule recognition and preconcentration capability) was synthesized in this study via a simple process and then utilized as a novel electrode material to electrochemically detect BZC. With the optimized experimental conditions, the HP-β-CD-CB nanohybrid-modified electrode shows wide linearity from 0.05 to 7.0 μM and very low detection limit (0.015 μM) for BZC detection. In addition, the repeatability, stability, and selectivity as well as practical-sample analysis of the HP-β-CD-CB electrode were investigated, and the observed results are desirable. The superior sensing performances coupled with its advantages including low-cost, simple and highly sensitive detection suggest that HP-β-CD-CB has important potential application for BZC analysis in practical samples.
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Affiliation(s)
- Zengchun Wang
- Department of Cardiac Surgery, Fujian Branch of Shanghai Children's Medical Center, Fuzhou, China.
- Fujian Children's Hospital, Fuzhou, China
- Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
- Department of Cardiovascular Surgery, Union Hospital, Fujian Medical University, Fuzhou, China
| | - Lingshan Yu
- Department of Cardiac Surgery, Fujian Branch of Shanghai Children's Medical Center, Fuzhou, China.
- Fujian Children's Hospital, Fuzhou, China
- Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Yu Huang
- Department of Cardiac Surgery, Fujian Branch of Shanghai Children's Medical Center, Fuzhou, China.
- Fujian Children's Hospital, Fuzhou, China
- Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Ye Chen
- Department of Cardiac Surgery, Fujian Branch of Shanghai Children's Medical Center, Fuzhou, China.
- Fujian Children's Hospital, Fuzhou, China
- Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Hua Cao
- Department of Cardiac Surgery, Fujian Branch of Shanghai Children's Medical Center, Fuzhou, China.
- Fujian Children's Hospital, Fuzhou, China
- Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
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9
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Krämer J, Kang R, Grimm LM, De Cola L, Picchetti P, Biedermann F. Molecular Probes, Chemosensors, and Nanosensors for Optical Detection of Biorelevant Molecules and Ions in Aqueous Media and Biofluids. Chem Rev 2022; 122:3459-3636. [PMID: 34995461 PMCID: PMC8832467 DOI: 10.1021/acs.chemrev.1c00746] [Citation(s) in RCA: 100] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Synthetic molecular probes, chemosensors, and nanosensors used in combination with innovative assay protocols hold great potential for the development of robust, low-cost, and fast-responding sensors that are applicable in biofluids (urine, blood, and saliva). Particularly, the development of sensors for metabolites, neurotransmitters, drugs, and inorganic ions is highly desirable due to a lack of suitable biosensors. In addition, the monitoring and analysis of metabolic and signaling networks in cells and organisms by optical probes and chemosensors is becoming increasingly important in molecular biology and medicine. Thus, new perspectives for personalized diagnostics, theranostics, and biochemical/medical research will be unlocked when standing limitations of artificial binders and receptors are overcome. In this review, we survey synthetic sensing systems that have promising (future) application potential for the detection of small molecules, cations, and anions in aqueous media and biofluids. Special attention was given to sensing systems that provide a readily measurable optical signal through dynamic covalent chemistry, supramolecular host-guest interactions, or nanoparticles featuring plasmonic effects. This review shall also enable the reader to evaluate the current performance of molecular probes, chemosensors, and nanosensors in terms of sensitivity and selectivity with respect to practical requirement, and thereby inspiring new ideas for the development of further advanced systems.
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Affiliation(s)
- Joana Krämer
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Rui Kang
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Laura M. Grimm
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Luisa De Cola
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Dipartimento
DISFARM, University of Milano, via Camillo Golgi 19, 20133 Milano, Italy
- Department
of Molecular Biochemistry and Pharmacology, Instituto di Ricerche Farmacologiche Mario Negri, IRCCS, 20156 Milano, Italy
| | - Pierre Picchetti
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- P.P.: email,
| | - Frank Biedermann
- Institute
of Nanotechnology, Karlsruhe Institute of
Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- F.B.: email,
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10
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Lin X, Zhang L, Tu M, Yin X, Cai L, Huang Y. Simple, low-cost and sensitive electrochemical sensing of antineoplastic drug amethopterin based on a nanocarbon black modified electrode. Anal Methods 2022; 14:526-531. [PMID: 35040833 DOI: 10.1039/d1ay01237a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Various methods have been proposed currently to detect amethopterin (ATP, a widely used anticancer drug that is also called methotrexate); however, a simple and low-cost electrochemical method coupled with high sensitivity is scarce. In this study, by using low-cost and readily available nanocarbon black (NCB), which has excellent conductivity and stable dispersion in water as well as large surface area, as electrode materials to modify a glassy carbon electrode (GCE), a simple, inexpensive and highly-sensitive electrochemical sensor was constructed based on NCB/GCE. The electrochemical behaviors of ATP at both NCB/GCE and GCE were studied; the results show that the peak current of ATP at NCB/GCE is extremely higher than that at the bare GCE. For sensing ATP with high sensitivity, various control conditions including accumulation time, pH values of the phosphate buffer solution and NCB amount were optimized. The quantitative testing results show that NCB/GCE presents excellent sensing performances with a wide linearity range from 0.01 to 10.0 μM and low limit of detection (4.0 nM) towards ATP. Moreover, the investigation in the reproducibility and stability as well as selectivity of NCB/GCE demonstrated that the related results are also satisfactory. It is thus simple and effective method for ATP analysis and has important applications.
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Affiliation(s)
- Xiaoqing Lin
- Provincial Clinical College, Fujian Medical University, Fuzhou 350001, China.
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Liangming Zhang
- Provincial Clinical College, Fujian Medical University, Fuzhou 350001, China.
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Mingshu Tu
- Provincial Clinical College, Fujian Medical University, Fuzhou 350001, China.
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Xiaoqing Yin
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou 350001, China
- Integrated Chinese and Western Medicine College, Fujian University of Traditional Chinese Medicine, Fuzhou 350001, China
| | - Liqing Cai
- Provincial Clinical College, Fujian Medical University, Fuzhou 350001, China.
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Yi Huang
- Provincial Clinical College, Fujian Medical University, Fuzhou 350001, China.
- Department of Clinical Laboratory, Fujian Provincial Hospital, Fuzhou 350001, China
- Central Laboratory, Fujian Provincial Hospital, Fuzhou 350001, China
- Center for Experimental Research in Clinical Medicine, Fujian Provincial Hospital, Fuzhou 350001, China
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11
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Du Y, Mo Z, Shuai C, Pei H, Wang J, Chen Y, Yue R, He S. Construction of a novel highly electroactive nano-composite film modified with cellulose gum for the electrochemical recognition of tryptophan isomers. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Pei H, Chen F, Niu X, Jia Q, Guo R, Liu N, Mo Z. Self-assembled chitosan-sodium alginate composite material for electrochemical recognition of tyrosine isomers. J Electroanal Chem (Lausanne) 2021; 895:115525. [DOI: 10.1016/j.jelechem.2021.115525] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Yang L, Luo F, Wei W. Simultaneous determination of the concentration and enantiomeric excess of amino acids with a coumarin-derived achiral probe. Anal Methods 2021; 13:1905-1910. [PMID: 33913945 DOI: 10.1039/d1ay00271f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The chirality of amino acids plays an important role in biological and medical sciences. The development of achiral small-molecule probes that can simultaneously determine the absolute configuration, enantiomeric excess, and total concentration of amino acids is significant. We reported the currently available achiral coumarin aldehyde probe that could form Schiff bases with free amino acids at room temperature to induce CD signals and change UV-vis signals. The red-shifted UV-vis signals were independent of the substrate's chirality and could be used to determine the total concentration. Conversely, the enantioselective CD signals could be used to determine the absolute configuration and enantiomeric excess. The usefulness and practicability of this sensing method were demonstrated by analyzing 6 non-racemic phenylalanine samples with different enantiomeric compositions and concentrations.
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Affiliation(s)
- Lamei Yang
- School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, P. R. China.
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14
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Gambhir D, Mondal B, Koner RR. Molecular-level insights into the self-assembly driven enantioselective recognition process. Chem Commun (Camb) 2021; 57:2535-2538. [PMID: 33566876 DOI: 10.1039/d0cc06612e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The importance of the orientation of functional groups in a chiral environment on enantioselective recognition has been demonstrated. Orientation controlled interactions of functional groups in (R)/(S)-MA lead to a visually differentiable morphology with an arginine-based gelator. The crucial role of various molecular-level interactions discriminating the enantioselective self-assembly has been established using different analytical techniques, crystal structure analysis, and DFT calculations.
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Affiliation(s)
- Diksha Gambhir
- School of Basic Science, Indian Institute of Technology, Mandi, Mandi-175075, Himachal Pradesh, India
| | - Bhaskar Mondal
- School of Basic Science, Indian Institute of Technology, Mandi, Mandi-175075, Himachal Pradesh, India
| | - Rik Rani Koner
- School of Basic Science, Indian Institute of Technology, Mandi, Mandi-175075, Himachal Pradesh, India and School of Engineering, Indian Institute of Technology, Mandi, Mandi-175075, Himachal Pradesh, India.
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Yang J, Li X, Du Y, Ma M, Zhang L, Zhang J, Li P. Colorimetric recognition of aromatic amino acid enantiomers by gluconic acid-capped gold nanoparticles. Amino Acids 2021; 53:195-204. [PMID: 33432455 DOI: 10.1007/s00726-020-02939-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Accepted: 12/26/2020] [Indexed: 11/25/2022]
Abstract
In this work, we prepared gold nanoparticles (AuNPs) by employing gluconic acid (GlcA) as reducing-cum-stabilizing agent. The proposed GlcA-AuNPs successfully worked as a colorimetric sensor for visual chiral recognition of aromatic amino acid enantiomers, namely tyrosine (D/L-Tyr), phenylalanine (D/L-Phe), and tryptophan (D/L-Trp). After adding L-types to GlcA-AuNPs solution, the color of the mixture changed from red to purple (or gray), while no obvious color change occurred on the addition of D-types. The effect can be detected by naked eyes. The particles have been characterized by transmission electron microscopy, Fourier-transform infrared spectroscopy, zeta potential, the dynamic light scattering analysis as well as UV-Vis spectroscopy. This assay can be used to determine the enantiomeric excess of L-Trp in the range from 0 to + 100%. The method has advantages in simplicity, sensitivity, fast response, and low cost.
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Affiliation(s)
- Jiangxia Yang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Xiaoqi Li
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, People's Republic of China.
| | - Yingxiang Du
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China.
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China.
| | - Mingxuan Ma
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Liu Zhang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Jian Zhang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Peipei Li
- Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No.24 Tongjiaxiang, Nanjing, 210009, Jiangsu, People's Republic of China
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Zhang R, Zhong Y, Lu Z, Chen Y, Li G. Rapid chiral analysis based on liquid-phase cyclic chemiluminescence. Chem Sci 2020; 12:660-668. [PMID: 34163797 PMCID: PMC8179003 DOI: 10.1039/d0sc03496g] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 10/21/2020] [Indexed: 01/11/2023] Open
Abstract
Rapid chiral analysis has become one of the important aspects of academic and industrial research. Here we describe a new strategy based on liquid-phase cyclic chemiluminescence (CCL) for rapid resolution of enantiomers and determination of enantiomeric excess (ee). A single CCL measurement can acquire multistage signals that provide a unique way to examine the intermolecular interactions between chiral hosts and chiral guests, because the lifetime (τ) of the multistage signals is a concentration-independent and distinguishable constant for a given chiral host-guest system. According to the τ values, CCL allows discrimination between a wide range of enantiomeric pairs including chiral alcohols, amines and acids by using only one chiral host. Even the chiral systems hardly distinguished by nuclear magnetic resonance and fluorescence methods can be distinguished easily by CCL. Additionally, the τ value of a mixture of two enantiomers is equal to the weighted average of each enantiomer, which can be used for the direct determination of ee without the need to separate the chiral mixture and create calibration curves. This is extremely crucial for the cases without readily available enantiomerically pure samples. This strategy was successfully applied to monitoring of the Walden inversion reaction and analysis of chiral drugs. The results were in good agreement with those obtained by high-performance liquid chromatography, indicating the utility of CCL for routine quick ee analysis. Mechanism study revealed that the τ value is possibly related to the activity of the chiral substance to catalyze a luminol-H2O2 reaction. Our research provides an unprecedented and general protocol for chirality differentiation and ee determination, which is anticipated to be a useful technology that will find wide application in chirality-related fields, particularly in asymmetric synthesis and the pharmaceutical industry.
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Affiliation(s)
- Runkun Zhang
- School of Chemistry, Sun Yat-sen University Guangzhou 510275 People's Republic of China
| | - Yanhui Zhong
- School of Chemistry, Sun Yat-sen University Guangzhou 510275 People's Republic of China
| | - Zhenyu Lu
- School of Chemistry, Sun Yat-sen University Guangzhou 510275 People's Republic of China
| | - Yanlong Chen
- School of Chemistry, Sun Yat-sen University Guangzhou 510275 People's Republic of China
| | - Gongke Li
- School of Chemistry, Sun Yat-sen University Guangzhou 510275 People's Republic of China
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17
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GunaVathana SD, Thivya P, Wilson J, Peter AC. Sensitive voltammetric sensor based on silver dendrites decorated polythiophene nanocomposite: Selective determination of L-Tryptophan. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127649] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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18
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Abstract
Chirality is a fundamental property of a molecule, and the significant progress in chirality detection and quantification of a molecule has inspired major advances in various fields ranging from chemistry, biology, to biotechnology and pharmacology. Chiral molecules have identical molecular formulas, atom-to-atom linkages, and bonding distances, and as such they are difficult to distinguish both sensitively and selectively. Today, most new drugs and those under development are chiral, which requires technological developments in the separation and detection of chiral molecules. Therefore, rapid and facile methods to detect and discriminate chiral compounds are necessary to accelerate advances in many research fields. The challenges in analysis stem from the obvious fact that chiral molecules have the same physical properties. Although significant progress on the detection of enantiomeric composition has been achieved in the past decade, in order to fully realize the capacity of chiral molecular interrogation, highly sensitive and selective, portable, and easy-to-use detection remains challenging because of the limitation of conventional techniques.Soft nanoarchitectonics is a new concept for the fabrication of functional soft material systems through harmonization of various actions including atomic/molecular-level manipulation, chemical reactions, self-assembly and self-organization, and their modulation by external fields/stimuli. Soft nanoarchitectonics has been widely used as a key enabling technology for integrating predefined molecular functionalities including electrochemical, optical, catalytic, or biological properties into biosensing devices, which provides exciting opportunities to design, assemble, and fabricate tailored nanosystems to enable new sensing strategies for chiral molecules.In this Account, we aim to concisely discuss how these molecule-inspired soft nanoarchitectonics work for enantioselective sensing. We will first outline the basic principle and mechanistic insights of the soft nanoarchitectonics approach for enantioselective sensing, and then we will describe the new breakthroughs and trends in the area that have been most recently reported by our groups and others. There will also be a discussion on the merits of soft nanoarchitectonics based sensing in comparison to conventional analytical methods. Finally, with this Account, we hope to spark new chiral molecule sensing strategies by fundamentally understanding chiral recognition and engineering soft nanoarchitectonics with programmable structures and predictable sensing properties.
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Affiliation(s)
- Jing Liu
- School of Life and Environmental Sciences, Deakin University, Geelong, Victoria 3216, Australia
| | - Hong Zhou
- School of Life and Environmental Sciences, Deakin University, Geelong, Victoria 3216, Australia
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, Ministry of Education; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Wenrong Yang
- School of Life and Environmental Sciences, Deakin University, Geelong, Victoria 3216, Australia
| | - Katsuhiko Ariga
- World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
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Qin M, Zhang Y, Liu J, Xing C, Zhao C, Dou X, Feng C. Visible Enantiomer Discrimination via Diphenylalanine-Based Chiral Supramolecular Self-Assembly on Multiple Platforms. Langmuir 2020; 36:2524-2533. [PMID: 32090561 DOI: 10.1021/acs.langmuir.9b03449] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of enantioselective recognition is of great significance in medical science and pharmaceutical industry, which associates with the molecular recognition phenomenon widely observed in biological systems. In particular, the facile and straight achievement of visual enantioselective recognition has been drawing increasing consideration, but it is still a challenge. Herein, a heterochiral diphenylalanine-based gelator (LFDF) is synthesized, presenting left-handed nanofibers during self-assembly in ethanol, which accomplishes the phenylalaninol enantiomer recognition on multiple platforms. When adding l- or d-phenylalaninol into LFDF supramolecular solution followed by ultrasonic treatment, precipitate and gel are formed, respectively. Meanwhile, LFDF supramolecular gel completely collapses in a minute after dropping l-phenylalaninol, while the gel almost remains when d-type is employed. Moreover, a fluorescent supramolecular xerogel (ThT-LFDF) is fabricated by combining the LFDF gelator with thioflavine T (ThT), which could detect l-phenylalaninol accompanying with fluorescence quenching while d-type with barely decreasing. And the ThT-LFDF xerogel system shows a good sensitivity (reaches to ppm) for the detection of l-phenylalaninol. It is found that the chirality of the assembled nanofibers, as well as amino and carboxyl of phenylalaninol, plays a critical role on the discrimination process. The multiple and visible enantioselective recognition of phenylalaninol through chiral supramolecular self-assemblies shows potential applications in the fields of medical science and pharmaceutical industry.
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Affiliation(s)
- Minggao Qin
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yaqian Zhang
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Jinying Liu
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Chao Xing
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Changli Zhao
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Xiaoqiu Dou
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Chuanliang Feng
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
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20
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Han Y, Lv W, Chen H, Li H, Chen J, Li Z, Qiu H. Chiral Fluorescent Silicon Nanoparticles for Aminopropanol Enantiomer: Fluorescence Discrimination and Mechanism Identification. Anal Chem 2020; 92:3949-3957. [DOI: 10.1021/acs.analchem.9b05442] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yangxia Han
- 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
| | - Wenjuan Lv
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou 730000, China
| | - Hongli Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou 730000, China
| | - Hui Li
- 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
| | - Zhan Li
- 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
| | - 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, Chinese Academy of Sciences, Beijing, 100039, China
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Khandelwal P, Singh DK, Poddar P. Advances in the Experimental and Theoretical Understandings of Antibiotic Conjugated Gold Nanoparticles for Antibacterial Applications. ChemistrySelect 2019. [DOI: 10.1002/slct.201900083] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Puneet Khandelwal
- Physical & Materials Chemistry DivisionCSIR-National Chemical Laboratory Pune - 411008 India
| | - Dheeraj K. Singh
- Department of PhysicsInstitute of Infrastructure Technology Research & Management Ahmedabad - 380026 India
| | - Pankaj Poddar
- Physical & Materials Chemistry DivisionCSIR-National Chemical Laboratory Pune - 411008 India
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Zhang F, Wang X, Tang H, Jie X, Jiang X, Wei W. A multichannel Au nanosensor for visual and pattern inspection of fatty acids. Nanotechnology 2019; 30:065502. [PMID: 30523802 DOI: 10.1088/1361-6528/aaf49d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fatty acids (FAs) are important dietary sources of fuel for animals and structural components for cells. The number, position and configuration of olefins in the alkyl chains play important roles in the impacts of FAs on human health. Currently, structural profiling of FAs in edible oils and fats is an important issue in nutrition industries and food safety. Due to the lack of distinct functional groups, it is extremely difficult to discriminate FAs with structural differences by facile and in situ sensing methods. A few chemosensors have been developed for shape selective sensing of FAs, but their capability and performance were still limited. Herein, for the first time, we proposed a multichannel Au nanosensor for visual and pattern-generating inspection of FAs based on the highly selective binding ability of Ag+ to olefinic bonds and Ag+ regulable color variation of Au nanoparticles. As a result, the nanosensor showed good selectivity for five FAs with subtle structural difference as low as 5 nM. By further deriving three channel signals in respect of color and color depth, a signature-like signal pattern could be generated by principal component analysis for each FA and even different FA mixtures such as edible oils. Hence, structural variation of FAs in edible hot pot oils with heat treatment was successfully monitored by this Au nanosensor over time. This sensor holds great promise in point-of-care inspection of edible oils and fats.
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Affiliation(s)
- Feng Zhang
- School of Pharmaceutical Sciences and Innovative Drug Research Centre, Chongqing University, No. 55 Daxuecheng South Rd., Chongqing 401331, People's Republic of China
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Niu X, Yang X, Mo Z, Guo R, Liu N, Zhao P, Liu Z, Ouyang M. Voltammetric enantiomeric differentiation of tryptophan by using multiwalled carbon nanotubes functionalized with ferrocene and β-cyclodextrin. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.12.041] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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