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Imran M, Kim EB, Kim TG, Ameen S, Akhtar MS, Kwak DH. Fabrication of Tungsten Oxide Nanowalls through HFCVD for Improved Electrochemical Detection of Methylamine. MICROMACHINES 2024; 15:441. [PMID: 38675252 PMCID: PMC11051922 DOI: 10.3390/mi15040441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/10/2024] [Accepted: 03/21/2024] [Indexed: 04/28/2024]
Abstract
In this study, well-defined tungsten oxide (WO3) nanowall (NW) thin films were synthesized via a controlled hot filament chemical vapor deposition (HFCVD) technique and applied for electrochemical detection of methylamine toxic substances. Herein, for the thin-film growth by HFCVD, the temperature of tungsten (W) wire was held constant at ~1450 °C and gasification was performed by heating of W wire using varied substrate temperatures ranging from 350 °C to 450 °C. At an optimized growth temperature of 400 °C, well-defined and extremely dense WO3 nanowall-like structures were developed on a Si substrate. Structural, crystallographic, and compositional characterizations confirmed that the deposited WO3 thin films possessed monoclinic crystal structures of high crystal quality. For electrochemical sensing applications, WO3 NW thin film was used as an electrode, and cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were measured with a wide concentration range of 20 μM~1 mM of methylamine. The fabricated electrochemical sensor achieved a sensitivity of ~183.65 μA mM-1 cm-2, a limit of detection (LOD) of ~20 μM and a quick response time of 10 s. Thus, the fabricated electrochemical sensor exhibited promising detection of methylamine with considerable stability and reproducibility.
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Affiliation(s)
- Mohammad Imran
- Advanced Materials and Devices Laboratory, Department of Bio-Convergence Science, Jeonbuk National University, Jeongeup Campus, Jeongeup 56212, Republic of Korea; (M.I.); (E.-B.K.)
- Environmental Engineering Laboratory, Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Eun-Bi Kim
- Advanced Materials and Devices Laboratory, Department of Bio-Convergence Science, Jeonbuk National University, Jeongeup Campus, Jeongeup 56212, Republic of Korea; (M.I.); (E.-B.K.)
| | - Tae-Geum Kim
- Department of Bio-Convergence Science, Jeonbuk National University, Jeongeup Campus, Jeongeup 56212, Republic of Korea;
| | - Sadia Ameen
- Advanced Materials and Devices Laboratory, Department of Bio-Convergence Science, Jeonbuk National University, Jeongeup Campus, Jeongeup 56212, Republic of Korea; (M.I.); (E.-B.K.)
| | - Mohammad Shaheer Akhtar
- Graduate School of Integrated Energy-AI, Jeonbuk National University, Jeonju 54896, Republic of Korea
- New & Renewable Energy Material Development Center (NewREC), Jeonbuk National University, Jeonbuk 56332, Republic of Korea
- Department of JBNU-KIST Industry-Academia Convergence Research, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Dong-Heui Kwak
- Environmental Engineering Laboratory, Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju 54896, Republic of Korea
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2
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Ghosh Dastidar M, Murugappan K, R Nisbet D, Tricoli A. Simultaneous electrochemical detection of glycated and human serum albumin for diabetes management. Biosens Bioelectron 2024; 246:115876. [PMID: 38039734 DOI: 10.1016/j.bios.2023.115876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/26/2023] [Accepted: 11/22/2023] [Indexed: 12/03/2023]
Abstract
Developing highly selective and sensitive biosensors for diabetes management blood glucose monitoring is essential to reduce the health risks associated with diabetes. Assessing the glycation (GA) of human serum albumin (HSA) serves as an indicator for medium-term glycemic control, making it suitable for assessing the efficacy of blood glucose management protocols. However, most biosensors are not capable of simultaneous detection of the relative fraction of GA to HSA in a clinically relevant range. Here, we report an effective miniaturised biosensor architecture for simultaneous electrochemical detection of HSA and GA across relevant concentration ranges. We immobilise DNA aptamers specific for the detection of HSA and GA on gold nanoislands (Au NIs) decorated screen-printed carbon electrodes (SPCEs), and effectively passivate the residual surface sites. We achieve a dynamic detection range between 20 and 60 mg/mL for HSA and 1-40 mg/mL for GA in buffer solutions. The analytical utility of our HSA and GA biosensor architectures are validated in mice serum indicating immediate potential for clinical applications. Since HSA and GA have similar structures, we extensively assess our sensor specificity, observing high selectivity of the HSA and GA sensors against each other and other commonly present interfering molecules in blood such as glucose, glycine, ampicillin, and insulin. Additionally, we determine the glycation ratio, which is a crucial metric for assessing blood glucose management efficacy, in an extensive range representing healthy and poor blood glucose management profiles. These findings provide strong evidence for the clinical potential of our biosensor architecture for point-of-care and self-assessment of diabetes management protocols.
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Affiliation(s)
- Monalisha Ghosh Dastidar
- Nanotechnology Research Laboratory, Research School of Chemistry, College of Science, Australian National University, Canberra, ACT, 2601, Australia
| | - Krishnan Murugappan
- Nanotechnology Research Laboratory, Research School of Chemistry, College of Science, Australian National University, Canberra, ACT, 2601, Australia; CSIRO, Mineral Resources, Private Bag 10, Clayton South, Victoria, 3169, Australia.
| | - David R Nisbet
- The Graeme Clark Institute, The University of Melbourne, Melbourne, Australia; Department of Biomedical Engineering, Faculty of Engineering and Information Technology, The University of Melbourne, Melbourne, Australia; Melbourne Medical School, Faculty of Medicine, Dentistry and Health Science, The University of Melbourne, Melbourne, Australia
| | - Antonio Tricoli
- Nanotechnology Research Laboratory, Research School of Chemistry, College of Science, Australian National University, Canberra, ACT, 2601, Australia; Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW, 2006, Australia.
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3
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Murugappan K, Sundaramoorthy U, Damry AM, Nisbet DR, Jackson CJ, Tricoli A. Electrodetection of Small Molecules by Conformation-Mediated Signal Enhancement. JACS AU 2022; 2:2481-2490. [PMID: 36465535 PMCID: PMC9709943 DOI: 10.1021/jacsau.2c00291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/10/2022] [Accepted: 08/10/2022] [Indexed: 06/17/2023]
Abstract
Electrochemical biosensors allow the rapid, selective, and sensitive transduction of critical biological parameters into measurable signals. However, current electrochemical biosensors often fail to selectively and sensitively detect small molecules because of their small size and low molecular complexity. We have developed an electrochemical biosensing platform that harnesses the analyte-dependent conformational change of highly selective solute-binding proteins to amplify the redox signal generated by analyte binding. Using this platform, we constructed and characterized two biosensors that can sense leucine and glycine, respectively. We show that these biosensors can selectively and sensitively detect their targets over a wide range of concentrations-up to 7 orders of magnitude-and that the selectivity of these sensors can be readily altered by switching the bioreceptor's binding domain. Our work represents a new paradigm for the design of a family of modular electrochemical biosensors, where access to electrode surfaces can be controlled by protein conformational changes.
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Affiliation(s)
- Krishnan Murugappan
- Nanotechnology
Research Laboratory, Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT2601, Australia
- CSIRO,
Mineral Resources, Private
Bag 10, Clayton South, VIC3169, Australia
| | | | - Adam M. Damry
- Research
School of Chemistry, The Australian National
University, Canberra, ACT2601, Australia
- Department
of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ONK1N 6N5, Canada
| | - David R. Nisbet
- Laboratory
of Advanced Biomaterials, Research School of Chemistry and the John
Curtin School of Medical Research, The Australian
National University, Canberra, ACT2601, Australia
- The Graeme
Clark Institute, The University of Melbourne, Melbourne, VIC3010, Australia
- Department
of Biomedical Engineering, Faculty of Engineering and Information
Technology, The University of Melbourne, Melbourne, VIC3010, Australia
| | - Colin J. Jackson
- Research
School of Chemistry, The Australian National
University, Canberra, ACT2601, Australia
- Australian
Research Council Centre of Excellence for Innovations in Peptide and
Protein Science, Research School of Chemistry, The Australian National University, Canberra, ACT2601, Australia
- Australian
Research Council Centre of Excellence in Synthetic Biology, Research
School of Chemistry, The Australian National
University, Canberra, ACT2601, Australia
| | - Antonio Tricoli
- Nanotechnology
Research Laboratory, Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT2601, Australia
- Nanotechnology
Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW2006, Australia
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4
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Zuliani I, Fattori A, Svigelj R, Dossi N, Grazioli C, Bontempelli G, Toniolo R. AMPEROMETRIC DETECTION OF ETHANOL VAPORS BY SCREEN PRINTED ELECTRODES MODIFIED BY PAPER CROWNS SOAKED WITH ROOM TEMPERATURE IONIC LIQUIDS. ELECTROANAL 2022. [DOI: 10.1002/elan.202200150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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5
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Yin W, Wang H, Deng B, Ma F, Zhang J, Zhou M, Wang H, Lu Y. A pyrylium salt-based fluorescent probe for the highly sensitive detection of methylamine vapour. Analyst 2022; 147:3451-3455. [DOI: 10.1039/d2an00911k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The MTPY exhibits an obvious fluorescence response from yellow to cyan when reacted with CH3NH2 with a low detection limit (2.6 ppt, 8.4 × 10−8 M). The sensing mechanism was traced by mass spectrometry.
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Affiliation(s)
- Wenzhu Yin
- Institute of Veterinary Immunology & Engineering, National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P. R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious and Zoonoses, Yangzhou, 225009, P. R. China
| | - Hongjin Wang
- College of Chemistry and Environmental Science, YiLi Normal University, Yining 835000, P.R. China
| | - Bihua Deng
- Institute of Veterinary Immunology & Engineering, National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P. R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious and Zoonoses, Yangzhou, 225009, P. R. China
| | - Fang Ma
- Institute of Veterinary Immunology & Engineering, National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P. R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious and Zoonoses, Yangzhou, 225009, P. R. China
| | - Jinqiu Zhang
- Institute of Veterinary Immunology & Engineering, National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P. R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious and Zoonoses, Yangzhou, 225009, P. R. China
| | - Mingxu Zhou
- Institute of Veterinary Immunology & Engineering, National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P. R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious and Zoonoses, Yangzhou, 225009, P. R. China
| | - Haiyang Wang
- Institute of Veterinary Immunology & Engineering, National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P. R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious and Zoonoses, Yangzhou, 225009, P. R. China
| | - Yu Lu
- Institute of Veterinary Immunology & Engineering, National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, P. R. China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious and Zoonoses, Yangzhou, 225009, P. R. China
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6
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Lee J, Mullen JW, Hussain G, Silvester DS. Effect of microelectrode array spacing on the growth of platinum electrodeposits and its implications for oxygen sensing in ionic liquids. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Huang Y, Wang S, Zhu Y, Li F, Jin J, Dong J, Lin F, Wang Y, Chen X. Dual-Mode of Fluorescence Turn-On and Wavelength-Shift for Methylamine Gas Sensing Based on Space-Confined Growth of Methylammonium Lead Tribromide Perovskite Nanocrystals. Anal Chem 2020; 92:5661-5665. [DOI: 10.1021/acs.analchem.0c00698] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yipeng Huang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Shuya Wang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Yimeng Zhu
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Feiming Li
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
- College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou, Fujian 363000, China
| | - Jingwen Jin
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Jing Dong
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Fangyuan Lin
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Yiru Wang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Xi Chen
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, Fujian 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, Guangdong 518000, China
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8
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Toniolo R, Dossi N, Giannilivigni E, Fattori A, Svigelj R, Bontempelli G, Giacomino A, Daniele S. Modified Screen Printed Electrode Suitable for Electrochemical Measurements in Gas Phase. Anal Chem 2020; 92:3689-3696. [PMID: 32008321 DOI: 10.1021/acs.analchem.9b04818] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe a convenient assembly for screen printed carbon electrodes (SPCE) suitable for analyses in gaseous samples which are of course lacking in supporting electrolytes. It consists of a circular crown of filter paper, soaked in a RTIL or a DES, placed upon a disposable screen printed carbon cell, so as to contact the outer edge of the carbon disk working electrode, as well as peripheral counter and reference electrodes. The electrical contact between the paper crown soaked in RTIL or DES and SPCE electrodes is assured by a gasket, and all components are installed in a polylactic acid holder. As a result of this configuration, a sensitive, fast-responding, membrane-free gas sensor is achieved where the real working electrode surface is the boundary zone of the carbon working disk contacted by the paper crown soaked in the polyelectrolyte. This assembly provides a portable and disposable electrochemical platform, assembled by the easy immobilization onto a porous and inexpensive supporting material such as paper of RTILs or DESs which are characterized by profitable electrical conductivity and negligible vapor pressure. The electroanalytical performance of this device was evaluated by voltammetric and flow injection analyses of oxygen which was chosen as prototype of electroactive gaseous analytes. The results obtained pointed out that this assembly is very profitable for the analysis of gaseous atmospheres, especially when used as detector for FIA in gaseous streams.
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Affiliation(s)
- Rosanna Toniolo
- Department of Agrifood, Environmental and Animal Sciences, University of Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Nicolò Dossi
- Department of Agrifood, Environmental and Animal Sciences, University of Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Emanuele Giannilivigni
- Department of Agrifood, Environmental and Animal Sciences, University of Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Andrea Fattori
- Department of Agrifood, Environmental and Animal Sciences, University of Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Rossella Svigelj
- Department of Agrifood, Environmental and Animal Sciences, University of Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Gino Bontempelli
- Department of Agrifood, Environmental and Animal Sciences, University of Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Agnese Giacomino
- Department of Drug Science and Technology, University of Torino, via Giuria 9, I-10125 Torino, Italy
| | - Salvatore Daniele
- Department of Molecular Science and Nanosystems, University of Ca' Foscari Venezia, via Torino 155, I-30137 Venezia-Mestre, Italy
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9
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Ge M, Hussain G, Hibbert DB, Silvester DS, Zhao C. Ionic Liquid‐based Microchannels for Highly Sensitive and Fast Amperometric Detection of Toxic Gases. ELECTROANAL 2018. [DOI: 10.1002/elan.201800409] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mengchen Ge
- School of Chemistry Faculty of Science The University of New South Wales Sydney 2052 Australia
| | - Ghulam Hussain
- Curtin Institute for Functional Molecules and Interfaces School of Molecular and Life Sciences Curtin University GPO Box U1987 Perth 6845, WA Australia
| | - D. Brynn Hibbert
- School of Chemistry Faculty of Science The University of New South Wales Sydney 2052 Australia
| | - Debbie S. Silvester
- Curtin Institute for Functional Molecules and Interfaces School of Molecular and Life Sciences Curtin University GPO Box U1987 Perth 6845, WA Australia
| | - Chuan Zhao
- School of Chemistry Faculty of Science The University of New South Wales Sydney 2052 Australia
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Wang F, Qi T, Su Z, Xie Y. Theoretical study on the optical response behavior to hydrogen chloride gas of a series of Schiff-base-based star-shaped structures. J Mol Model 2018; 24:58. [PMID: 29453758 DOI: 10.1007/s00894-018-3603-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 01/30/2018] [Indexed: 11/25/2022]
Abstract
Schiff-base compounds have many applications in the field of optoelectronic materials and chemical sensing because of their appealing coordination ability, and simple and easily accessible use in structural modification. Herein, five kinds of star-shaped Schiff-base compounds were designed and their optical response behavior to hydrogen chloride (HCl) gas was studied using dependent/time-dependent density functional theory (DFT/TDDFT). Moreover, the relationship between structures and properties was investigated upon changing the benzene group into N atom or triazine group at the core-position and introducing a methoxyl (-OCH3) or nitro (-NO2) group into the star-shaped Schiff-bases at the tail of the branches. The results show that all five Schiff-bases could be candidates for HCl gas sensing materials. Furthermore, introducing an electron-donating group at either the core or the tail forms a charge transfer channel with the electron deficient H-bonded imino group, which is convenient for charge transfer and subsequently promotes a red-shift in absorption spectra and fluorescence quenching.
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Affiliation(s)
- Fei Wang
- Department of Chemistry, Faculty of Science, Yanbian University, Yanji, 133002, People's Republic of China
| | - Tianhong Qi
- Department of Chemistry, Faculty of Science, Yanbian University, Yanji, 133002, People's Republic of China
| | - Zhongmin Su
- Department of Chemistry, Faculty of Science, Yanbian University, Yanji, 133002, People's Republic of China.,Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, People's Republic of China
| | - Yuzhong Xie
- Department of Chemistry, Faculty of Science, Yanbian University, Yanji, 133002, People's Republic of China.
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Screen-Printed Graphite Electrodes as Low-Cost Devices for Oxygen Gas Detection in Room-Temperature Ionic Liquids. SENSORS 2017; 17:s17122734. [PMID: 29186869 PMCID: PMC5751384 DOI: 10.3390/s17122734] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/20/2017] [Accepted: 11/21/2017] [Indexed: 01/26/2023]
Abstract
Screen-printed graphite electrodes (SPGEs) have been used for the first time as platforms to detect oxygen gas in room-temperature ionic liquids (RTILs). Up until now, carbon-based SPEs have shown inferior behaviour compared to platinum and gold SPEs for gas sensing with RTIL solvents. The electrochemical reduction of oxygen (O₂) in a range of RTILs has therefore been explored on home-made SPGEs, and is compared to the behaviour on commercially-available carbon SPEs (C-SPEs). Six common RTILs are initially employed for O₂ detection using cyclic voltammetry (CV), and two RTILs ([C₂mim][NTf₂] and [C₄mim][PF₆]) chosen for further detailed analytical studies. Long-term chronoamperometry (LTCA) was also performed to test the ability of the sensor surface for real-time gas monitoring. Both CV and LTCA gave linear calibration graphs-for CV in the 10-100% vol. range, and for LTCA in the 0.1-20% vol. range-on the SPGE. The responses on the SPGE were far superior to the commercial C-SPEs; more instability in the electrochemical responses were observed on the C-SPEs, together with some breaking-up or dissolution of the electrode surface materials. This study highlights that not all screen-printed ink formulations are compatible with RTIL solvents for longer-term electrochemical experiments, and that the choice of RTIL is also important. Overall, the low-cost SPGEs appear to be promising platforms for the detection of O₂, particularly in [C₄mim][PF₆].
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12
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13
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Mechanical polishing as an improved surface treatment for platinum screen-printed electrodes. SENSING AND BIO-SENSING RESEARCH 2016. [DOI: 10.1016/j.sbsr.2016.05.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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14
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Lee J, Arrigan DWM, Silvester DS. Achievement of Prolonged Oxygen Detection in Room-Temperature Ionic Liquids on Mechanically Polished Platinum Screen-Printed Electrodes. Anal Chem 2016; 88:5104-11. [DOI: 10.1021/acs.analchem.5b04782] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Junqiao Lee
- Nanochemistry Research Institute,
Department of Chemistry, Curtin University, GPO Box U1987, Perth, Western
Australia 6845, Australia
| | - Damien W. M. Arrigan
- Nanochemistry Research Institute,
Department of Chemistry, Curtin University, GPO Box U1987, Perth, Western
Australia 6845, Australia
| | - Debbie S. Silvester
- Nanochemistry Research Institute,
Department of Chemistry, Curtin University, GPO Box U1987, Perth, Western
Australia 6845, Australia
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15
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Murugappan K, Silvester DS. Electrochemical studies of hydrogen chloride gas in several room temperature ionic liquids: mechanism and sensing. Phys Chem Chem Phys 2016; 18:2488-94. [DOI: 10.1039/c5cp06656e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The behaviour of HCl in six RTILs reveals significant reactions with [PF6]− anions, but electrochemical sensing is still possible in RTILs with [NTf2]− anions.
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Affiliation(s)
- Krishnan Murugappan
- Nanochemistry Research Institute
- Department of Chemistry
- Curtin University
- Perth
- Australia
| | - Debbie S. Silvester
- Nanochemistry Research Institute
- Department of Chemistry
- Curtin University
- Perth
- Australia
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