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Bilge S, Dogan-Topal B, Gürbüz MM, Yücel A, Sınağ A, Ozkan SA. Recent advances in electrochemical sensing of cocaine: A review. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Vignon A, Flaget A, Michelas M, Djeghdir M, Defrancq E, Coche-Guerente L, Spinelli N, Van der Heyden A, Dejeu J. Direct Detection of Low-Molecular-Weight Compounds in 2D and 3D Aptasensors by Biolayer Interferometry. ACS Sens 2020; 5:2326-2330. [PMID: 32786219 DOI: 10.1021/acssensors.0c00925] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The direct biolayer interferometry (BLI) measurement of low-molecular-weight (LMW) analytes (<200 Da) still represents a challenge, in particular, when low receptor densities are used. BLI is a powerful optical technique for the label-free, real-time characterization and quantification of biomolecular interactions at interfaces. We demonstrate herein that the quantification of biomolecular recognition is possible by BLI using either 2D-like or 3D platforms for aptamer ligand immobilization. The influence of the aptamer density on the interaction was evaluated and compared for the two sensor architectures. Despite the LMW of the analyte, BLI monitoring led to signals that are exploitable for affinity and kinetic studies, even at low aptamer density. We demonstrate that the immobilization format as well as the aptamer density has a crucial influence on the determination of the recognition parameters.
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Affiliation(s)
- Anthony Vignon
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - Arthur Flaget
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - Maxime Michelas
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - Mehdi Djeghdir
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | - Eric Defrancq
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | | | - Nicolas Spinelli
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
| | | | - Jérôme Dejeu
- Univ. Grenoble Alpes, CNRS, DCM UMR-5250, F-38000 Grenoble, France
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Chen Y, Wang Y, Yan P, Ouyang Q, Dong J, Qian J, Chen J, Xu L, Li H. Co 3O 4 nanoparticles/graphitic carbon nitride heterojunction for photoelectrochemical aptasensor of oxytetracycline. Anal Chim Acta 2020; 1125:299-307. [PMID: 32674777 DOI: 10.1016/j.aca.2020.05.038] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 03/25/2020] [Accepted: 05/15/2020] [Indexed: 10/24/2022]
Abstract
As a broad-spectrum tetracycline antibiotic, the overuse of oxytetracycline (OTC) causes antibiotics residues in the environment and seriously threats to human health owing to effective antibacterial properties. Thus, it is particularly important to design a photoelectrochemical (PEC) aptasensor to detect OTC with excellent performance. Herein, we developed a selective and stable PEC aptasensor of OTC on the basis of Co3O4 nanoparticles (Co3O4 NPs)/graphitic carbon nitride (g-CN) heterojunction, used as PEC active materials. The Co3O4 NPs were successfully grown on the g-CN via grinding and calcining mixture of Co3O4 precursors and bulk g-CN. The Co3O4/g-CN heterojunction with improved light utilization and promoted electrons/holes separation capability can exhibit higher PEC signal than that of g-CN. In order to implement the purpose of specific recognition, OTC-aptamer was introduced into modified electrode to construct highly selective PEC aptasensor for OTC determination, which can possess wide linear range (0.01-500 nM) with low detection limit (3.5 pM, S/N = 3). This PEC aptasensor platform with excellent selectivity and high stability can provide a practical application in the field of water monitoring.
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Affiliation(s)
- Yun Chen
- School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Yuming Wang
- School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Pengcheng Yan
- School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Qingqing Ouyang
- School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Jintao Dong
- School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China
| | - Junchao Qian
- Jiangsu Key Laboratory for Environment Functional Materials, Jiangsu Key Laboratory of Intelligent Building Energy Efficiency, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Jianping Chen
- Jiangsu Key Laboratory for Environment Functional Materials, Jiangsu Key Laboratory of Intelligent Building Energy Efficiency, Suzhou University of Science and Technology, Suzhou, 215009, China
| | - Li Xu
- School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China.
| | - Henan Li
- School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China.
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Jones NS, Comparin JH. Interpol review of controlled substances 2016-2019. Forensic Sci Int Synerg 2020; 2:608-669. [PMID: 33385148 PMCID: PMC7770462 DOI: 10.1016/j.fsisyn.2020.01.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 01/23/2020] [Indexed: 12/14/2022]
Abstract
This review paper covers the forensic-relevant literature in controlled substances from 2016 to 2019 as a part of the 19th Interpol International Forensic Science Managers Symposium. The review papers are also available at the Interpol website at: https://www.interpol.int/content/download/14458/file/Interpol%20Review%20Papers%202019.pdf.
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Affiliation(s)
- Nicole S. Jones
- RTI International, Applied Justice Research Division, Center for Forensic Sciences, 3040 E. Cornwallis Road, Research Triangle Park, NC, 22709-2194, USA
| | - Jeffrey H. Comparin
- United States Drug Enforcement Administration, Special Testing and Research Laboratory, USA
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Mede T, Jäger M, Schubert US. "Chemistry-on-the-complex": functional Ru II polypyridyl-type sensitizers as divergent building blocks. Chem Soc Rev 2018; 47:7577-7627. [PMID: 30246196 DOI: 10.1039/c8cs00096d] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Ruthenium polypyridyl type complexes are potent photoactive compounds, and have found - among others - a broad range of important applications in the fields of biomedical diagnosis and phototherapy, energy conversion schemes such as dye-sensitized solar cells (DSSCs) and molecular assemblies for tailored photo-initiated processes. In this regard, the linkage of RuII polypyridyl-type complexes with specific functional moieties is highly desirable to enhance their inherent photophysical properties, e.g., with a targeting function to achieve cell selectivity, or with a dye or redox-active subunits for energy- and electron-transfer. However, the classical approach of performing ligand syntheses first and the formation of Ru complexes in the last steps imposes synthetic limitations with regard to tolerating functional groups or moieties as well as requiring lengthy convergent routes. Alternatively, the diversification of Ru complexes after coordination (termed "chemistry-on-the-complex") provides an elegant complementary approach. In addition to the Click chemistry concept, the rapidly developing synthesis and purification methodologies permit the preparation of Ru conjugates via amidation, alkylation and cross-coupling reactions. In this regard, recent developments in chromatography shifted the limits of purification, e.g., by using new commercialized surface-modified silica gels and automated instrumentation. This review provides detailed insights into applying the "chemistry-on-the-complex" concept, which is believed to stimulate the modular preparation of unpreceded molecular assemblies as well as functional materials based on Ru-based building blocks, including combinatorial approaches.
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Affiliation(s)
- Tina Mede
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany.
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de Jong M, Florea A, Vries AMD, van Nuijs ALN, Covaci A, Van Durme F, Martins JC, Samyn N, De Wael K. Levamisole: a Common Adulterant in Cocaine Street Samples Hindering Electrochemical Detection of Cocaine. Anal Chem 2018; 90:5290-5297. [DOI: 10.1021/acs.analchem.8b00204] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mats de Jong
- AXES Research Group, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- Drugs and Toxicology Department, National Institute for Criminalistics and Criminology, Vilvoordsesteenweg 100, 1120 Brussels, Belgium
| | - Anca Florea
- AXES Research Group, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Anne-Mare de Vries
- NMR and Structure Analysis Group, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
| | | | - Adrian Covaci
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Filip Van Durme
- Drugs and Toxicology Department, National Institute for Criminalistics and Criminology, Vilvoordsesteenweg 100, 1120 Brussels, Belgium
| | - José C. Martins
- NMR and Structure Analysis Group, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
| | - Nele Samyn
- Drugs and Toxicology Department, National Institute for Criminalistics and Criminology, Vilvoordsesteenweg 100, 1120 Brussels, Belgium
| | - Karolien De Wael
- AXES Research Group, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
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