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Desai V, Panchal M, Parikh J, Modi K, Vora M, Panjwani F, Jain VK. Fluorescence Quenching and the Chamber of Nitroaromatics: A Dinaphthoylated Oxacalix[4]arene's (DNOC) Adventure Captured through Computational and Experimental Study. J Fluoresc 2023:10.1007/s10895-023-03505-8. [PMID: 37995071 DOI: 10.1007/s10895-023-03505-8] [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: 09/29/2023] [Accepted: 11/06/2023] [Indexed: 11/24/2023]
Abstract
This research presents the application of Dinaphthoylated Oxacalix[4]arene (DNOC) as a novel fluorescent receptor for the purpose of selectively detecting nitroaromatic compounds (NACs). The characterization of DNOC was conducted through the utilization of spectroscopic methods, including 1H-NMR, 13C-NMR, and ESI-MS. The receptor demonstrated significant selectivity in acetonitrile towards several nitroaromatic analytes, such as MNA, 2,4-DNT, 2,3-DNT, 1,3-DNB, 2,6-DNT, and 4-NT. This selectivity was validated by the measurement of emission spectra. The present study focuses on the examination of binding constants, employing Stern-Volmer analysis, as well as the determination of the lowest detection limit (3σ/Slope) and fluorescence quenching. These investigations aim to provide insights into the inclusion behavior of DNOC with each of the six analytes under fluorescence spectra investigation. Furthermore, the selectivity trend of the ligand DNOC for NAC detection is elucidated using Density Functional Theory (DFT) calculations conducted using the Gaussian 09 software. The examination of energy gaps existing between molecular orbitals, namely the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), provides a valuable understanding of electron-transfer processes and electronic interactions. Smaller energy gaps are indicative of heightened selectivity resulting from favorable electron-transfer processes, whereas bigger gaps suggest less selectivity attributable to weaker electronic contacts. This work integrates experimental and computational methodologies to provide a full understanding of the selective binding behavior of DNOC. As a result, DNOC emerges as a viable chemical sensor for detecting nitroaromatic explosives.
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Affiliation(s)
- Vishv Desai
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Manthan Panchal
- Department of Chemistry, Silver Oak Institute of Science, Silver Oak University, Ahmedabad, Gujarat, India.
| | - Jaymin Parikh
- Department of Chemistry, Faculty of Science, Ganpat University, Kherva, 384012, Mehsana, Gujarat, India
| | - Krunal Modi
- Department of Humanities and Science, School of Engineering, Indrashil University, Mehsana, 382740, Gujarat, India.
| | - Manoj Vora
- Chemical Engineering Department, Institute of Technology, Nirma University, Ahmedabad, 382481, Gujarat, India
| | - Falak Panjwani
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Vinod Kumar Jain
- Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India.
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2
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Dong H, Liu X, Gan L, Fan D, Sun X, Zhang Z, Wu P. Nucleic acid aptamer-based biosensors and their application in thrombin analysis. Bioanalysis 2023. [PMID: 37326345 DOI: 10.4155/bio-2023-0058] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023] Open
Abstract
Thrombin is a multifunctional serine protease that plays an important role in coagulation and anticoagulation processes. Aptamers have been widely applied in biosensors due to their high specificity, low cost and good biocompatibility. This review summarizes recent advances in thrombin quantification using aptamer-based biosensors. The primary focus is optical sensors and electrochemical sensors, along with their applications in thrombin analysis and disease diagnosis.
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Affiliation(s)
- Hang Dong
- State Key Laboratory of Targeting Oncology, National Center for International Research of Bio-Targeting Theranostics, Guangxi Key Laboratory of Bio-Targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis & Therapy, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Xiyu Liu
- State Key Laboratory of Targeting Oncology, National Center for International Research of Bio-Targeting Theranostics, Guangxi Key Laboratory of Bio-Targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis & Therapy, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Lu Gan
- State Key Laboratory of Targeting Oncology, National Center for International Research of Bio-Targeting Theranostics, Guangxi Key Laboratory of Bio-Targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis & Therapy, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Dianfa Fan
- State Key Laboratory of Targeting Oncology, National Center for International Research of Bio-Targeting Theranostics, Guangxi Key Laboratory of Bio-Targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis & Therapy, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Xinjun Sun
- State Key Laboratory of Targeting Oncology, National Center for International Research of Bio-Targeting Theranostics, Guangxi Key Laboratory of Bio-Targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis & Therapy, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Zhikun Zhang
- State Key Laboratory of Targeting Oncology, National Center for International Research of Bio-Targeting Theranostics, Guangxi Key Laboratory of Bio-Targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis & Therapy, Guangxi Medical University, Nanning, Guangxi, 530021, China
| | - Pan Wu
- State Key Laboratory of Targeting Oncology, National Center for International Research of Bio-Targeting Theranostics, Guangxi Key Laboratory of Bio-Targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis & Therapy, Guangxi Medical University, Nanning, Guangxi, 530021, China
- Pharmaceutical College, Guangxi Medical University, Nanning, Guangxi, 530021, China
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3
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Trovato V, Sfameni S, Rando G, Rosace G, Libertino S, Ferri A, Plutino MR. A Review of Stimuli-Responsive Smart Materials for Wearable Technology in Healthcare: Retrospective, Perspective, and Prospective. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27175709. [PMID: 36080476 PMCID: PMC9457686 DOI: 10.3390/molecules27175709] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 02/07/2023]
Abstract
In recent years thanks to the Internet of Things (IoT), the demand for the development of miniaturized and wearable sensors has skyrocketed. Among them, novel sensors for wearable medical devices are mostly needed. The aim of this review is to summarize the advancements in this field from current points of view, focusing on sensors embedded into textile fabrics. Indeed, they are portable, lightweight, and the best candidates for monitoring biometric parameters. The possibility of integrating chemical sensors into textiles has opened new markets in smart clothing. Many examples of these systems are represented by color-changing materials due to their capability of altering optical properties, including absorption, reflectance, and scattering, in response to different external stimuli (temperature, humidity, pH, or chemicals). With the goal of smart health monitoring, nanosized sol-gel precursors, bringing coupling agents into their chemical structure, were used to modify halochromic dyestuffs, both minimizing leaching from the treated surfaces and increasing photostability for the development of stimuli-responsive sensors. The literature about the sensing properties of functionalized halochromic azo dyestuffs applied to textile fabrics is reviewed to understand their potential for achieving remote monitoring of health parameters. Finally, challenges and future perspectives are discussed to envisage the developed strategies for the next generation of functionalized halochromic dyestuffs with biocompatible and real-time stimuli-responsive capabilities.
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Affiliation(s)
- Valentina Trovato
- Department of Engineering and Applied Sciences, University of Bergamo, Viale Marconi 5, 24044 Dalmine, Italy
| | - Silvia Sfameni
- Department of Engineering, University of Messina, Contrada di Dio, S. Agata, 98166 Messina, Italy
- Institute for the Study of Nanostructured Materials, ISMN–CNR, Palermo, c/o Department of ChiBioFarAm, University of Messina, Viale F. Stagno d’Alcontres 31, Vill. S. Agata, 98166 Messina, Italy
| | - Giulia Rando
- Institute for the Study of Nanostructured Materials, ISMN–CNR, Palermo, c/o Department of ChiBioFarAm, University of Messina, Viale F. Stagno d’Alcontres 31, Vill. S. Agata, 98166 Messina, Italy
- Department of ChiBioFarAm, University of Messina, Viale F. Stagno d’Alcontres 31, Vill. S. Agata, 98166 Messina, Italy
| | - Giuseppe Rosace
- Department of Engineering and Applied Sciences, University of Bergamo, Viale Marconi 5, 24044 Dalmine, Italy
- Correspondence: (G.R.); (S.L.); (A.F.); (M.R.P.)
| | - Sebania Libertino
- Institute of Microelectronics and MicrosystemsCNR–IMM, Ottava Strada 5, 95121 Catania, Italy
- Correspondence: (G.R.); (S.L.); (A.F.); (M.R.P.)
| | - Ada Ferri
- Department of Applied Science and Technology, Politecnico Di Torino, Corso Duca Degli Abruzzi 24, 10129 Torino, Italy
- Correspondence: (G.R.); (S.L.); (A.F.); (M.R.P.)
| | - Maria Rosaria Plutino
- Institute for the Study of Nanostructured Materials, ISMN–CNR, Palermo, c/o Department of ChiBioFarAm, University of Messina, Viale F. Stagno d’Alcontres 31, Vill. S. Agata, 98166 Messina, Italy
- Correspondence: (G.R.); (S.L.); (A.F.); (M.R.P.)
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Vora M, Panchal M, Dey S, Pandya A, Athar M, Verma N, Irfan A, Jain V. Oxacalix[4]arene based dual-signalling fluorimetric and electrochemical chemosensor for the selective detection of nitroaromatic compounds. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119791] [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]
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5
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Guo J, Li S, Wang S, Wang J. Determination of Trace Phosphoprotein in Food Based on Fluorescent Probe-Triggered Target-Induced Quench by Electrochemiluminescence. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:12738-12748. [PMID: 33107726 DOI: 10.1021/acs.jafc.0c05308] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Evaluation of the nutrition and determination of phosphoproteins is of great importance in different foods as aberrant phosphorylation changes many biological processes and can relate to health conditions. In this study, an ultrafast (5 min) and sensitive electrochemiluminescence (ECL) sensor was innovatively fabricated for the determination of phosphoproteins in foods on the basis of fluorescent probe NH2-TiO2/upconversion nanomaterials (UCNPs). Impressively, the ECL intensity of NH2-TiO2/UCNPs-rGO/GCE was remarkably enhanced by 29 times. Furthermore, the photoactive NH2-TiO2 layer provided not only specific selectivity but also a large surface area as well as an unprecedented photocatalytic activity for the NH2-TiO2/UCNPs-rGO/GCE ECL sensor (TIECLS), which could serve as an identification element for trace phosphoproteins. Under optimal conditions, the TIECLS achieved a relatively low detection limit of 9.2 × 10-5 mg/mL (S/N = 3). Practical application of this TIECLS was carried out in different food samples with satisfying results, which were validated by laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS).
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Affiliation(s)
- Jianping Guo
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, 29 The Thirteenth Road, Tianjin Economy and Technology Development Area, Tianjin 300457, P.R. China
| | - Shijie Li
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, 29 The Thirteenth Road, Tianjin Economy and Technology Development Area, Tianjin 300457, P.R. China
| | - Shuo Wang
- Medical college, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin 300350, P.R. China
| | - Junping Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, 29 The Thirteenth Road, Tianjin Economy and Technology Development Area, Tianjin 300457, P.R. China
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6
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Panchal M, Kongor A, Athar M, Modi K, Patel C, Dey S, Vora M, Bhadresha K, Rawal R, Jha P, Jain V. Structural motifs of oxacalix[4]arene for molecular recognition of nitroaromatic explosives: Experimental and computational investigations of host-guest complexes. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112809] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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7
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Panchal U, Modi K, Liska A, Ludvik J, Dey S, Patel C, Jain VK. Facile Construction and In Silico Study of Quinoline‐Attached Resorcinarene Fluorescent Sensor for the Recognition of Insensitive Munition Compounds. ChemistrySelect 2018. [DOI: 10.1002/slct.201802586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Urvi Panchal
- Department of ChemistryUniversity School of SciencesGujarat University Ahmedabad – 380009, Gujarat India
| | - Krunal Modi
- Department of Molecular Electrochemistry and CatalysisJ. Heyrovský Institute of Physical chemistry Dolejškova 2155/3, 182 23 Prague 8 Czech Republic
| | - Alan Liska
- Department of Molecular Electrochemistry and CatalysisJ. Heyrovský Institute of Physical chemistry Dolejškova 2155/3, 182 23 Prague 8 Czech Republic
| | - Jiri Ludvik
- Department of Molecular Electrochemistry and CatalysisJ. Heyrovský Institute of Physical chemistry Dolejškova 2155/3, 182 23 Prague 8 Czech Republic
| | - Shuvankar Dey
- Department of ChemistryUniversity School of SciencesGujarat University Ahmedabad – 380009, Gujarat India
| | - Chirag Patel
- Department of BotanyBioinformatics and Climate Change Impacts ManagementUniversity School of SciencesGujarat University Ahmedabad – 380009, Gujarat India
| | - V. K. Jain
- Department of ChemistryUniversity School of SciencesGujarat University Ahmedabad – 380009, Gujarat India
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8
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Modi K, Panchal U, Patel C, Bhatt K, Dey S, Mishra D, Jain VK. Dual in vitro and in silico analysis of thiacalix[4]arene dinaphthalene sulfonate for the sensing of 4-nitrotoluene and 2,3-dinitrotoluene. NEW J CHEM 2018. [DOI: 10.1039/c7nj03820h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A newly synthesized thiacalix[4]arene dinaphthalene sulfonate, i.e., TCDNS, has been used as a fluorescence quencher for 2,3-DNT as well as 4-NT. The complex was analyzed by ESI-MS and 1H-NMR titration, which has been further confirmed by the in silico study.
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Affiliation(s)
- Krunal Modi
- J. Heyrovsky Institute of Physical Chemistry
- Academy of Sciences of the Czech Republic
- 182 23 Prague 8
- Czech Republic
| | - Urvi Panchal
- Department of Chemistry
- University School of Sciences
- Gujarat University
- Ahmedabad
- India
| | - Chirag Patel
- Department of Botany
- Bioinformatics and Climate Change Impacts Management
- University School of Science
- Gujarat University
- Ahmedabad-380 009
| | - Keyur Bhatt
- Department of Chemistry
- Ganpat University
- Kherwa
- India
| | - Shuvankar Dey
- Department of Chemistry
- University School of Sciences
- Gujarat University
- Ahmedabad
- India
| | - Divya Mishra
- Department of Chemistry
- University School of Sciences
- Gujarat University
- Ahmedabad
- India
| | - V. K. Jain
- Department of Chemistry
- University School of Sciences
- Gujarat University
- Ahmedabad
- India
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9
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Xuan H, Yao C, Hao X, Liu C, Ren J, Zhu Y, Xu C, Ge L. Fluorescence enhancement with one-dimensional photonic crystals/nanoscaled ZnO composite thin films. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.03.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Zhang H, Yu D, Zhao Y, Fan A. Turn-on chemiluminescent sensing platform for label-free protease detection using streptavidin-modified magnetic beads. Biosens Bioelectron 2014; 61:45-50. [DOI: 10.1016/j.bios.2014.04.050] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 04/18/2014] [Accepted: 04/26/2014] [Indexed: 11/24/2022]
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11
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Diehl KL, Anslyn EV. Array sensing using optical methods for detection of chemical and biological hazards. Chem Soc Rev 2013; 42:8596-611. [DOI: 10.1039/c3cs60136f] [Citation(s) in RCA: 247] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Barbe JM, Stern C, Pacholska E, Espinosa E, Guilard R. Improved routes for the synthesis of face-to-face bismacrocycles in porphyrin and corrole series. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424604000283] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Face-to-face bismacrocycles involving porphyrinoid species are still of great interest owing to their versatile properties. Despite the fact that their syntheses generally involve several steps, numerous modifications have been made in their synthetic pathways thus allowing their preparation in gram quantities. Here we report on recent improvements we could propose especially for the synthesis of bisporphyrin, biscorrole and porphyrin-corrole derivatives.
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Affiliation(s)
- Jean-Michel Barbe
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Christine Stern
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Ewa Pacholska
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Enrique Espinosa
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Roger Guilard
- Laboratoire d'Ingénierie Moléculaire pour la Séparation et les Applications des Gaz (LIMSAG UMR 5633), Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
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13
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Fluorescence enhancement by heterostructure colloidal photonic crystals with dual stopbands. J Colloid Interface Sci 2011; 356:63-8. [DOI: 10.1016/j.jcis.2010.12.078] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 12/16/2010] [Accepted: 12/28/2010] [Indexed: 11/18/2022]
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14
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Yang C, Zhang Z, Wang J. Flow-injection chemiluminescence determination of dihydralazine sulfate in serum using luminol and diperiodatocuprate (III) system. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:77-82. [PMID: 19910243 DOI: 10.1016/j.saa.2009.09.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 08/23/2009] [Accepted: 09/25/2009] [Indexed: 05/28/2023]
Abstract
A novel flow-injection chemiluminescence (CL) method for the determination of dihydralazine sulfate (DHZS) is described. The method is based on the reaction of luminol and diperiodatocuprate (K(2)[Cu(H(2)IO(6))(OH)(2)], DPC) in alkaline medium to emit CL, which is greatly enhanced by DHZS. The possible CL mechanism was first proposed based on the kinetic characteristic, CL spectrum and UV spectra. The optimum condition for the CL reaction was in detail studied using flow-injection system. The experiments indicated that under optimum condition, the CL intensity was linearly related to the concentration of DHZS in the range of 7.0x10(-9) to 8.6x10(-7) g mL(-1) with a detection limit (3sigma) of 2.1x10(-9) g mL(-1). The proposed method had good reproducibility with the relative standard deviation 3.1% (n=7) for 5.2x10(-8) g mL(-1) of DHZS. This method has the advantages of simple operation, fast response and high sensitivity. The special advantage of the system is that very low concentration of luminol can react with DPC catalyzed by DHZS to get excellent experiment results. And CL cannot be observed nearly when luminol with same concentration reacts with other oxidants, so luminol-DPC system has higher selectivity than other luminol CL systems. The method has been successfully applied to determine DHZS in serum.
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Affiliation(s)
- Chunyan Yang
- College of Chemistry and Materials Science, Shaanxi Normal University, Xi'an, China
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15
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Chemiluminescence determination of indole derivatives in human body fluids and soil by flow injection analysis using potassium permanganate. Mikrochim Acta 2009. [DOI: 10.1007/s00604-009-0257-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Germain ME, Knapp MJ. Optical explosives detection: from color changes to fluorescence turn-on. Chem Soc Rev 2009; 38:2543-55. [DOI: 10.1039/b809631g] [Citation(s) in RCA: 836] [Impact Index Per Article: 55.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Xu CH, Sun W, Zheng YR, Fang CJ, Zhou C, Jin JY, Yan CH. Logic circuits constructed with an ion-sensitive fluorescent molecule 1,2-di[5-methoxy-2-(2-pyridyl)thiazoyl]ethyne. NEW J CHEM 2009. [DOI: 10.1039/b817098c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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18
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Affiliation(s)
- Wujian Miao
- Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, Mississippi 39406, USA.
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19
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Yang P, Chen Y, Zhu Q, Wang F, Wang L, Li Y. Sensitive chemiluminescence method for the determination of glutathione, l-cysteine and 6-mercaptopurine. Mikrochim Acta 2008. [DOI: 10.1007/s00604-008-0006-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Hu D, Han H, Zhou R, Dong F, Bei W, Jia F, Chen H. Gold(iii) enhanced chemiluminescence immunoassay for detection of antibody against ApxIV of Actinobacillus pleuropneumoniae. Analyst 2008; 133:768-73. [DOI: 10.1039/b715476c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Sanchez JC, Toal SJ, Wang Z, Dugan RE, Trogler WC. Selective detection of trace nitroaromatic, nitramine, and nitrate ester explosive residues using a three-step fluorimetric sensing process: a tandem turn-off, turn-on sensor. J Forensic Sci 2007; 52:1308-13. [PMID: 17944906 DOI: 10.1111/j.1556-4029.2007.00560.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Detection of trace quantities of explosive residues plays a key role in military, civilian, and counter-terrorism applications. To advance explosives sensor technology, current methods will need to become cheaper and portable while maintaining sensitivity and selectivity. The detection of common explosives including trinitrotoluene (TNT), cyclotrimethylenetrinitramine, cyclotetramethylene-tetranitramine, pentaerythritol tetranitrate, 2,4,6-trinitrophenyl-N-methylnitramine, and trinitroglycerin may be carried out using a three-step process combining "turn-off" and "turn-on" fluorimetric sensing. This process first detects nitroaromatic explosives by their quenching of green luminescence of polymetalloles (lambda em approximately 400-510 nm). The second step places down a thin film of 2,3-diaminonaphthalene (DAN) while "erasing" the polymetallole luminescence. The final step completes the reaction of the nitramines and/or nitrate esters with DAN resulting in the formation of a blue luminescent traizole complex (lambda(em) = 450 nm) providing a "turn-on" response for nitramine and nitrate ester-based explosives. Detection limits as low as 2 ng are observed. Solid-state detection of production line explosives demonstrates the applicability of this method to real world situations. This method offers a sensitive and selective detection process for a diverse group of the most common high explosives used in military and terrorist applications today.
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Affiliation(s)
- Jason C Sanchez
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093-0358, USA
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22
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Cao W, Mu X, Yang J, Shi W, Zheng Y. Flow injection-chemiluminescence determination of phenol using potassium permanganate and formaldehyde system. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 66:58-62. [PMID: 16815091 DOI: 10.1016/j.saa.2006.02.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2005] [Accepted: 02/15/2006] [Indexed: 05/10/2023]
Abstract
It is found that phenol can react with potassium permanganate in the acidic medium and produce chemiluminescence, which is greatly enhanced by formaldehyde. The optimum conditions for this chemiluminescent reaction are in detail studied using a flow injection system. The experiments indicate that under optimum conditions, the chemiluminescence intensity is linearly related to the concentration of phenol in the range 5.0x10(-9) to 1.0x10(-6)gmL-1 with a detection limit (3sigma) of 3x10(-9)gmL-1. The relative standard deviation is 1.2% for 4.0x10(-7)gmL-1 phenol solution in 11 repeated measurements. This method has the advantages of simple operation, fast response and high sensitivity. The method is successfully applied to the determination of phenol in the waste water.
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Affiliation(s)
- Wei Cao
- School of Chemistry and Chemical Engineering, Jinan University, Jinan 250022, China
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Zhou Y, Zhang Y, Lau C, Lu J. Sequential Determination of Two Proteins by Temperature-Triggered Homogeneous Chemiluminescent Immunoassay. Anal Chem 2006; 78:5920-4. [PMID: 16906741 DOI: 10.1021/ac060783s] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel protocol for performing a sequential dual-protein immunoassay, based on a temperature-triggered separation/mixing process and HRP-catalyzed chemiluminescence (CL) detection, is described. In contrast to current multilabel-based detection techniques, a single HRP label is employed in this proposed method. Herein we introduce poly(N-isopropylacrylamide) (PNIP) and magnetic beads as bimolecular immobilizing carriers to separate different targets by taking advantage of thermal response, as demonstrated by sequential detection of human IgG and IgA. PNIP is known to aggregate and precipitate out of water when the temperature is raised above the lower critical solution temperature (LCST) of 31 degrees C; thus, it can be separated from supernatant by centrifugation. Besides, magnetic beads can be separated from PNIP by magnetic force as the temperature is lower than LCST. A homogeneous noncompetitive ELISA was employed, formed by primary antibodies immobilized onto the surface of magnetic beads and PNIP, antigen as IgG and IgA in the sample, and HRP-labeled second antibodies. Moreover, highly sensitive CL detection of HRP was applied, and the detection limits of IgG and IgA were as low as 2.0 and 1.5 ng/mL, respectively. Within the calibrated amount, the protocol had excellent precision within 11% for each target and was comparable in performance to commercial single-analyte ELISAs. Furthermore, the proposed method has been successfully applied to the determination of dual analyte in real samples without cross-reaction, and a good correlation was achieved after comparison with the conventional assay for IgG and IgA in 40 human serum samples.
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Affiliation(s)
- Yang Zhou
- School of Pharmacy and Zhongshan Hospital, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
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24
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Han HY, He ZK, Zeng YE. Chemiluminescence Method for the Determination of Glutathione in Human Serum Using the Ru(phen)3 2+ – KMnO4 System. Mikrochim Acta 2006. [DOI: 10.1007/s00604-006-0513-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Zhang ZF, Cui H, Shi MJ. Chemiluminescence accompanied by the reaction of gold nanoparticles with potassium permanganate. Phys Chem Chem Phys 2006; 8:1017-21. [PMID: 16482345 DOI: 10.1039/b511917k] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It was found that potassium permanganate (KMnO(4)) could react with gold nanoparticles in a strong acid medium to generate particle size-dependent chemiluminescence (CL). For gold nanoparticles with the size of 2.6 or 6.0 nm, the reaction was fast and could produce the excited state Mn(II) with light emission around 640 nm. For gold nanoparticles larger than 6.0 nm, no light emission was observed due to a much slower reaction rate. The CL intensity was found to increase linearly with the concentration of 2.6 nm gold nanoparticles. The effects of the acid medium, concentration of KMnO(4) and presence of N(2) and O(2) were investigated. UV-Vis absorption spectra and X-ray photoelectron spectra (XPS) measured before and after the CL reaction were analyzed. A CL mechanism has been proposed suggesting that the potassium permanganate was reduced by gold nanoparticles in the strong acid medium to the excited state Mn(II), yielding light emission. The results bestow new light on the size-dependent chemical reactivities of the gold nanoparticles and on nanoparticle-induced chemiluminescence. The CL reaction was considered to be of potential use for bioanalysis applications.
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Affiliation(s)
- Zhi-Feng Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, China
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26
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Liu M, Cheng X, Zhao L, Lin JM. On-line preparation of peroxymonocarbonate and its application for the study of energy transfer chemiluminescence to lanthanide inorganic coordinate complexes. LUMINESCENCE 2006; 21:179-85. [PMID: 16645954 DOI: 10.1002/bio.903] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
It has been shown that peroxymonocarbonate ion (HCO(4) (-)) is a potent oxidant. In this study, a flow-injection system was developed in order to prepare on-line HCO(4) (-) ion and the optimum conditions for the on-line preparation of HCO(4) (-) were studied in detail. We used 99% (13)C-enriched NaHCO(3) to examine peroxymonocarbonate by (13)C-NMR at 25 degrees C. An ultra-weak chemiluminescence (CL) was observed after mixing H(2)O(2) and sodium bicarbonate in an organic co-solvent that can accelerate the formation of HCO(4) (-) ion. When lanthanide inorganic coordinate complex, Eu(II)-EDTA, was added into this HCO(4) (-) system, the CL intensity was significantly enhanced. The CL mechanism was investigated by various methods. The experimental results indicate that peroxymonocarbonate oxidizes Eu(II) to Eu(III) and produces singlet oxygen; meanwhile, the energy originating from dimers of singlet oxygen is accepted by the Eu(III)-EDTA(-) complex. The excited Eu(III) ions undergo radiative deactivation and emit CL.
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Affiliation(s)
- Meilin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, 100085 Beijing, China
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Faure S, Stern C, Espinosa E, Douville J, Guilard R, Harvey PD. Triplet-Triplet Energy Transfer Controlled by the Donor-Acceptor Distance in Rigidly Held Palladium-Containing Cofacial Bisporphyrins. Chemistry 2005; 11:3469-81. [PMID: 15812878 DOI: 10.1002/chem.200400990] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Eleven new complexes, including mono-, heterobi-, and homobimetallic cofacial bisporphyrins, (Pd)H2DPS, (M)H2DPX, (M)H2DPB, (PdZn)DPS, (PdZn)DPX, (Pt)2DPX, (M)2DPB (M = Pd, Pt), and (Pt)P (DPS4- = 4,6-bis[5-(2,8,13,17-tetraethyl-3,7,12,18-tetramethylporphyrinyl)]dibenzothiophene tetraanion, DPX(4-) = 4,5-bis[5-(2,8,13,17-tetraethyl-3,7,12,18-tetramethylporphyrinyl)]-9,9-dimethylxanthene tetraanion, DPB4- = 1,8-bis[5-(2,8,13,17-tetraethyl-3,7,12,18-tetramethylporphyrinyl)]biphenylene tetraanion, P2- = 5-phenyl-2,8,13,17-tetraethyl-3,7,12,18-tetramethylporphyrin dianion) have been synthesized and characterized. The photophysical properties of the donor (M)P (M=Pd or Pt, P=porphyrin chromophore) and the acceptor (free base H(2)P or (Zn)P) depend on the C(meso)-C(meso) distance and the presence of a heavy atom such as Pd(II) or Pt(II). The data were compared with those for the known compounds (Pd)2DPS, (Pd)2DPX, H4DPS, H4DPX, H4DPB, (Pd)P, (Zn)P, and H(2)P. The rate constants for triplet-triplet energy transfer (k(ET)) were measured for the heterobimetallic (PdZn) and monometallic [(M)H2] derivatives (M=Pd, Pt). The fluorescence lifetimes (Deltatau(F)) of the acceptors decrease as a result of the heavy-atom effect, and vary as follows: (Pd)H2DPS<<(Pd)H2DPX approximately (Pd)H2DPB. The k(ET) values calculated according to the equation k(ET)=(1/tau(emi)-1/tau(emi) (0)), where tau(emi) (0) is the emission lifetime of the homobimetallic bisporphyrins (no ET occurs), are equal to 0, 247+/-57 and 133+/-52 s(-1) for DPS, DPX, and DPB, respectively, in the (Pd)H(2) series. These measurements allowed the range of distance over which the Dexter mechanism for T(1)-T(1) energy transfer ceases to operate to be determined. This distance is somewhere between 4.3 and 6.3 A, in agreement with our recent findings on singlet-singlet energy transfer. During the course of this study, the X-ray crystal structure for (Pd)H2DPX was obtained; triclinic (P1), a = 11.1016(1), b = 14.9868(2), c = 20.6786(3) A, alpha = 102.091(1), beta = 100.587(1), gamma = 101.817(1) degrees , V = 3199.19(7) A(3), Z = 2.
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Affiliation(s)
- Sébastien Faure
- LIMSAG UMR 5633, Université de Bourgogne, 6 bd Gabriel, 21100 Dijon, France
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Fan A, Lau C, Lu J. Magnetic Bead-Based Chemiluminescent Metal Immunoassay with a Colloidal Gold Label. Anal Chem 2005; 77:3238-42. [PMID: 15889914 DOI: 10.1021/ac050163b] [Citation(s) in RCA: 161] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel, sensitive chemiluminescent (CL) immunoassay has been developed by taking advantage of a magnetic separation/mixing process and the amplification feature of colloidal gold label. First, the sandwich-type complex is formed in this protocol by the primary antibody immobilized on the surface of magnetic beads, the antigen in the sample, and the second antibody labeled with colloidal gold. Second, a large number of Au3+ ions from each gold particle anchored on the surface of magnetic beads are released after oxidative gold metal dissolution and then quantitatively determined by a simple and sensitive Au3+-catalyzed luminol CL reaction. Third, this protocol is evaluated for a noncompetitive immunoassay of a human immunoglobulin G, and a concentration as low as 3.1 x 10(-12) M is determined, which is competitive with colloidal gold-based anodic stripping voltammetry (ASV), colorimetric ELISA, or immunoassays based on fluorescent europium chelate labels. The high performance of this protocol is related to the sensitive CL determination of Au3+ ion (detection limit of 2 x 10(-10) M), which is 25 times higher than that by ASV at a single-use carbon-based screen-printed electrode. From the analytical chemistry point of view, this protocol will be quite promising for numerous applications in immunoassay and DNA hybridization.
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Affiliation(s)
- Aiping Fan
- School of Pharmacy, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
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29
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Borges EP, Lavorante AF, Reis BFD. Determination of bromide ions in seawater using flow system with chemiluminescence detection. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2004.07.058] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Cao W, Yang JH, Sun CX, Zhang ZJ, Gao QF. Flow-injection-chemiluminescence method for the determination of penicillin G potassium. LUMINESCENCE 2005; 20:238-42. [PMID: 16134206 DOI: 10.1002/bio.839] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The degradation product of penicillin G potassium can react with potassium permanganate in acidic medium and produce chemiluminescence, which is greatly enhanced by formaldehyde. The optimum conditions for this chemiluminescent reaction were studied in detail using a flow-injection system. The experiments indicated that under optimum conditions, the chemiluminescence intensity was linearly related to the concentration of penicillin G potassium within the range 1.0 x 10(-7)-1.0 x 10(-5) g/mL, with a detection limit (3sigma) of 7 x 10(-8) g/mL. The relative standard deviation was 1.0% for 4.0 x 10(-7) g/mL penicillin G potassium solution (n = 11). This method has the advantages of simple operation, fast response and high sensitivity. The method was successfully applied to the analysis of penicillin G potassium in raw medicines.
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Affiliation(s)
- Wei Cao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
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31
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Cao W, Yang JH, Sun CX, Chen YJ, Gao QF. Flow injection-chemiluminescence determination of amoxycillin using potassium permanganate and formaldehyde system. LUMINESCENCE 2005; 20:20-4. [PMID: 15685663 DOI: 10.1002/bio.796] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
It was found that amoxycillin can react with potassium permanganate in an acidic medium to produce chemiluminescence, which is greatly enhanced by formaldehyde. The optimum conditions for this chemiluminescent reaction were studied in detail using a flow-injection system. The experimental results indicate that, under optimum conditions, the chemiluminescence intensity is linearly related to the concentration of amoxycillin in the range 5.48 x 10(-8)-2.74 x 10(-6) mol/L, with a detection limit (3sigma) of 4.1 x 10(-8) mol/L. The relative standard deviation was 1.0% at 1.1 x 10(-6) mol/L amoxycillin (n = 11 measurements). This method has the advantages of high sensitivity, fast response and ease of operation. The method was successfully applied to the determination of amoxycillin in raw medicines and capsules.
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Affiliation(s)
- Wei Cao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
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Xie H, Zhang C, Gao Z. Amperometric detection of nucleic acid at femtomolar levels with a nucleic acid/electrochemical activator bilayer on gold electrode. Anal Chem 2004; 76:1611-7. [PMID: 15018558 DOI: 10.1021/ac0350965] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cationic redox polymers containing osmium-bipyridine complexes strongly interact with anionic enzymes, such as glucose oxidase and peroxidases, and electrochemically "activate" the enzymes. On the basis of these observations, attempts were made to develop an ultrasensitive nucleic acid biosensor. A mixed monolayer of single-stranded oligonucleotide capture probe and 16-mercaptohexadecanoic acid was formed on a gold electrode through self-assembly. Following hybridization with a complementary nucleic acid and glucose oxidase labeled oligonucleotide detection probe, a cationic redox polymer (electrochemical activator) overcoating was applied to the electrode through layer-by-layer electrostatic self-assembly. The formation of an anionic-cationic bilayer brought the glucose oxidase in electrical contact with the redox polymer, making the bilayer an electrocatalyst for the oxidation of glucose. Thus, nucleic acid molecules were quantified amperometrically at femtomolar levels. The effect of experimental variables on the amperometric response was investigated and optimized to maximize the sensitivity and speed up the assay time. A detection limit of 1.0 fmol/L in 1.0-microL droplets and a linear current-concentration relationship up to 800 fmol/L were attained following a 30-min hybridization. The biosensor was applied to the detection of the 16S gene in a mixture of Escherichia coli 16S + 32S rRNA and a full-length rat housekeeping gene, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), of a RT-PCR product.
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Affiliation(s)
- Hong Xie
- Institute of Bioengineering & Nanotechnology, 51 Science Park Road, Singapore 117586
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Garcı́a Reyes J, Llorent Martı́nez E, Ortega Barrales P, Molina Dı́az A. Multiwavelength fluorescence based optosensor for simultaneous determination of fuberidazole, carbaryl and benomyl. Talanta 2004; 64:742-9. [DOI: 10.1016/j.talanta.2004.03.049] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2004] [Revised: 03/23/2004] [Accepted: 03/26/2004] [Indexed: 10/26/2022]
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34
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Powe AM, Fletcher KA, St Luce NN, Lowry M, Neal S, McCarroll ME, Oldham PB, McGown LB, Warner IM. Molecular Fluorescence, Phosphorescence, and Chemiluminescence Spectrometry. Anal Chem 2004; 76:4614-34. [PMID: 15307770 DOI: 10.1021/ac040095d] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Aleeta M Powe
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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Rabinovich E, Sviminoshvilli T, O'Brien MJ, Brueck SRJ, Lopez GP. Dual closed-loop, optoelectronic, auto-oscillatory detection circuit for monitoring fluorescence lifetime-based chemical sensors and biosensors. JOURNAL OF BIOMEDICAL OPTICS 2004; 9:609-617. [PMID: 15189100 DOI: 10.1117/1.1688814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We present a new detection instrument for sensor measurements based on excited-state fluorescence lifetimes. This system consists of a primary optoelectronic loop containing a resonance-type rf amplifier, a modulatable fluorescence-excitation light source, a fiber optic feedback loop (with a gap for a fluorescent sensor), and a photomultiplier tube. A secondary, phase-feedback optoelectronic circuit consists of a long-wavelength-pass optical filter, a second photomultiplier tube, a photodiode, an electronic phase detector, a dc amplifier, and an electronic phase shifter (inserted into the main loop). This phase-feedback circuit is new with respect to our previous work. Under the appropriate conditions, the main loop exhibits self-oscillations, manifesting themselves as sinusoidal rf modulation of light intensity. The phase-feedback circuit detects the modulation phase shift resulting from the finite excited-state lifetimes of a fluorophore. As the excited state lifetime changes, the phase shift from the electronic phase shifter also changes, which results in a shift in self-oscillation frequency. The detection system uses self-oscillation frequency as the detection parameter and has excellent resolution with respect to changes in excited-state lifetime ( approximately 1 ps). (c) 2004 Society of Photo-Optical Instrumentation Engineers.
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Affiliation(s)
- Emmanuil Rabinovich
- Center for High Technology Materials, University of New Mexico, 1313 Goddard SE, Albuquerque, NM 87106, USA
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Reyes J, Barrales P, Dı́az A. Gel-surface enhanced fluorescence sensing system coupled to a continuous-flow assembly for simultaneous monitoring of benomyl and carbendazim. Anal Chim Acta 2003. [DOI: 10.1016/s0003-2670(03)00818-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Kaniansky D, Masár M, Bodor R, Zúborová M, Olvecká E, Jöhnck M, Stanislawski B. Electrophoretic separations on chips with hydrodynamically closed separation systems. Electrophoresis 2003; 24:2208-2227. [PMID: 12858394 DOI: 10.1002/elps.200305474] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This review focuses on capillary electrophoretic separations performed on capillary electrophoresis chips (CE chips) with hydrodynamically closed separation systems in a context with transport processes (electroosmotic flow (EOF)) and hydrodynamic flow (HDF)) that may accompany the separations in these devices. It also reflects some relevant works dealing with conventional CE operating under such hydrodynamic conditions. The use of zone electrophoresis (ZE), isotachophoresis (ITP) and their on-line combination (ITP-ZE) on the single-column and column-coupling CE chips with the closed separation systems and related problems are key topics of the review. Some attention is paid to sample pretreatment in the separations performed on the CE chips. Here, mainly potentialities of the ITP-ZE combination in trace analysis applications of the miniaturized systems are discussed in a broader extent. Links between the ZE separation and detection provide a frame for the discussion of current status of the detection on the CE chips. Analytical applications illustrate potentialities of the CE chips operating with the closed separation systems (suppressed HDF and EOF) to the determination of small ions present in various matrices by ZE, ITP and ITP-ZE.
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Affiliation(s)
- Dusan Kaniansky
- Department of Analytical Chemistry, Faculty of Science, Comenius University, Bratislava, Slovakia.
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