1
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Mao P, Song Y, Zhao X, Wu W, Wang Y. A Ratiometric Benzimidazole-Based Fluorescent Probe for The Recognition of Phosgene in Solution and Gaseous Phases. J Fluoresc 2024:10.1007/s10895-024-03847-x. [PMID: 39007931 DOI: 10.1007/s10895-024-03847-x] [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: 04/23/2024] [Accepted: 07/03/2024] [Indexed: 07/16/2024]
Abstract
Considering the high toxicity and widespread application of phosgene, there is an urgent need to develop a simple and sensitive method for detecting phosgene. In this work, we designed and synthesized a novel ratiometric fluorescent probe 1 containing fluorophores of benzimidazole and benzothiazole. Probe 1 showed excellent sensitivity (< 30 s) and selectivity (LOD = 3.82 nM) for phosgene and significant ratiometric fluorescence changes. In addition, 1-loaded polystyrene membrane test strips were used to conveniently and efficiently detect phosgene gas (0.5 ppm) via the naked eye and the RGB APP of the smartphone, indicating that this probe has great potential for phosgene detection in the gaseous phase.
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Affiliation(s)
- Pandong Mao
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University, Jiaozuo, 454000, PR China
- Henan Key Laboratory of Industrial Microbial Resources and Fermentation Technology, School of Biological and Chemical Engineering, Nanyang Institute of Technology, Nanyang, 473004, PR China
| | - Yufei Song
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University, Jiaozuo, 454000, PR China
| | - Xiaolei Zhao
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University, Jiaozuo, 454000, PR China
| | - Weina Wu
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University, Jiaozuo, 454000, PR China.
| | - Yuan Wang
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University, Jiaozuo, 454000, PR China.
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2
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Wang Y, Xu G, Zhang X, Yang X, Hou H, Ai W, Zhao L. N- and S-codoped carbon quantum dots for enhancing fluorescence sensing of trace Hg 2. Phys Chem Chem Phys 2023; 25:28230-28240. [PMID: 37823325 DOI: 10.1039/d3cp02924g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Carbon-quantum-dot-based fluorescence sensing of Hg2+ is a well-known cost-effective tactic with fast response and high sensitivity, while rationally constructing heteroatom-doped carbon quantum dots with improved fluorescence sensing performances through tuning the electronic and chemical structures of the reactive site still remains a challenging project for monitoring trace Hg2+ in aquatic ecosystems to avoid harm resulting from its high toxicity, nonbiodegradabilty and accumulative effects on human health. Herein, intriguing N,S-codoped carbon quantum dots were synthesized via a facile one-step hydrothermal procedure. As an admirable fluorescent probe with plentiful heteroatom-related functional groups, these N,S-codoped carbon quantum dots can exhibit an absolute fluorescence quantum yield as high as 11.6%, excellent solubility and stability over three months, remarkable sensitivity for Hg2+ detection with an attractive detection limit of 0.27 μg L-1 and admirable selectivity for Hg2+ against thirteen other metal ions. Density functional theory calculations reveal that electron-enriched meta-S of the unique graphitic N with homocyclic meta-thiophene sulfur structure can regulate this N site to have more electrons and preferable affinity towards Hg, hence achieving enhanced fluorescence quenching due to greater charge transfer from N to Hg after the coordination interaction. This strategy provides a promising avenue for precisely designing purpose-made quantum dots with the dedicated fluorescence sensing applications.
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Affiliation(s)
- Yujie Wang
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Guoliang Xu
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Xinghe Zhang
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Xiaona Yang
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Hongbo Hou
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Wei Ai
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
| | - Liju Zhao
- Department of Chemistry, College of Resource and Environment, Baoshan University, Baoshan 678000, P. R. China.
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3
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Singseeta W, Wongsing B, Naksen P, Jarujamrus P, Pencharee S. Portable Multispectral Fluorometer for Determination of Formalin in Food Samples Using Nitrogen-Doped Carbon Dots as the Fluorescence Probe. TALANTA OPEN 2023. [DOI: 10.1016/j.talo.2023.100199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023] Open
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4
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Chen M, Wang J, Zhang Q, Zhang J, Chen Z, Sun R. Reversible detection of Hg(II) in pure water based on thymine modified nitrogen, sulfur co-doped carbon dots combined with antidote. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:121998. [PMID: 36279800 DOI: 10.1016/j.saa.2022.121998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Conventional Hg2+ visual sensors are unsustainable, hindering their practical application for improved water quality and health. In order to address this challenge, herein, N, S co-doped carbon nanodots (NS-CDs) were prepared and well characterized, presented the fluorescent monitoring for Hg2+ over other metal ions with the limit of detection (LOD) of 0.47 µM. Next, the CDs were successfully modified by thymine without any fluorescence labelling (referred to as T-NS-CDs). The sensitivity to Hg2+ cloud be noticeable enhanced due to the formation of T-Hg2+-T specific base pairs. Accordingly, the LOD was calculated with values as low as 1.56 nM. Furthermore, Hg2+ could be released and complexed with antidote (meso-2,3-dimercaptosuccinic acid) (DMSA-Hg2+), being the responsible for the reversible interconversion between T-Hg2+-T and DMSA-Hg2+. Interestingly, the proposed sensing system also applies to the fluorescent sensing for Hg2+ in tap water with satisfactory recoveries (96.97 %-101.38 %, RSD < 2 %). Thus, by simply combination of elemental doping and surface functionalization, the surface state and functionalities of CDs could be tailorable, endowing the fluorometric sensing towards Hg2+ in environmental system.
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Affiliation(s)
- Min Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550025, China
| | - Jun Wang
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550025, China.
| | - Qianbo Zhang
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550025, China
| | - Jinsheng Zhang
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550025, China
| | - Zhiming Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550025, China
| | - Rongguo Sun
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550025, China
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5
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Huang W, Zhao L, Shen R, Li G, Ling L. RGB color analysis of formaldehyde in vegetables based on DNA functionalized gold nanoparticles and triplex DNA. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:3598-3604. [PMID: 36047367 DOI: 10.1039/d2ay00689h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A highly sensitive and selective RGB color analysis for the detection of formaldehyde (FA) was developed by using a DNA functionalized gold nanoparticle (AuNPs-DNA) probe. When complementary oligonucleotides (oligo 2 and oligo 3) and a silver ion (Ag+) were added to the AuNPs-DNA solution, triplex DNA was formed, resulting in the aggregation of AuNPs, and accompanied by a solution color change from red to purple. With the addition of formaldehyde, it reacted with Ag+, decreased the stability of triplex DNA between AuNPs-DNA, induced the dispersion of AuNPs, and the color of AuNPs recovered to red. Therefore, the formaldehyde concentration could be estimated with the RGB (red, green, blue) values of the AuNP solution by using a smartphone application (APP). The R value of the system was proportional to the concentration of formaldehyde within the range of 0.23-4.50 mg L-1, with a detection limit of 0.14 mg L-1. The method has been successfully applied to detect the residues of formaldehyde in vegetable samples and has the potential of the on-site determination of formaldehyde.
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Affiliation(s)
- Wenxiu Huang
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P.R. China.
| | - Lizhen Zhao
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P.R. China.
| | - Ruidi Shen
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P.R. China.
| | - Gongke Li
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P.R. China.
| | - Liansheng Ling
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P.R. China.
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Fan Y, Che S, Zhang L, Zhou C, Fu H, She Y. Highly sensitive visual fluorescence sensor for aminoglycoside antibiotics in food samples based on mercaptosuccinic acid-CdTe quantum dots. Food Chem 2022; 404:134040. [DOI: 10.1016/j.foodchem.2022.134040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 11/28/2022]
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7
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Lv Z, Zhang M, Jin H, Wei M. An Ultrasensitive DNA Sensor for Hg
2+
Assay Based on Electrodeposited Au/Carbon Nanofibers‐chitosan and Reduced Graphene Oxide. ELECTROANAL 2022. [DOI: 10.1002/elan.202200152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zeping Lv
- College of Food Science and Technology Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou 450001 PR China
| | - Mingli Zhang
- College of Food Science and Technology Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou 450001 PR China
| | - Huali Jin
- College of Food Science and Technology Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou 450001 PR China
| | - Min Wei
- College of Food Science and Technology Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control Henan University of Technology Zhengzhou 450001 PR China
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9
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Wang K, Dong E, Fang M, Chen T, Zhu W, Li C. Construction of ratio fluorescence sensor based on CdTe quantum dots and benzocoumarin-3-carboxylic acid for Hg2+ detection. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1016/j.cjac.2022.100070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Development of QDs-based nanosensors for heavy metal detection: A review on transducer principles and in-situ detection. Talanta 2021; 239:122903. [PMID: 34857381 DOI: 10.1016/j.talanta.2021.122903] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/15/2021] [Accepted: 09/22/2021] [Indexed: 12/17/2022]
Abstract
Heavy metal pollution has severe threats to the ecological environment and human health. Thus, it is urgent to achieve the rapid, selective, sensitive and portable detection of heavy metal ions. To overcome the defects of traditional methods such as time-consuming, low sensitivity, high cost and complicated operation, QDs (Quantum dots)-based nanomaterials have been used in sensors to significantly improve the sensing performance. Due to their excellent physicochemical properties, high specific surface area, high adsorption and reactive capacity, nanomaterials could act as potential probes or offer enhanced sensitivity and create a promising nanosensors platform. In this review, the rapidly advancing types of QDs for heavy metal ions detection are first summarized. Modified with ligands, nanomaterials, or biomaterials, QDs are assembled on sensors by the interaction of electrostatic adsorption, chemical bonding, steric hindrance, and base-pairing. The stability of QDs-based nanosensors is improved by doping the elements to QDs, providing the reference substance, optimizing the assemble strategies and so on. Then, according to transducer principles, the two most typical sensor categories based on QDs: optical and electrochemical sensors are highlighted to be discussed. In the meanwhile, portable devices combining with QDs to adapt the practical detection in complex situations are summarized. The deficiencies and future challenges of QDs in toxicity, specificity, portability, multi-metal co-detection and degradation during the detection are also pointed out. In the end, the development trends of QDs-based nanosensors for heavy metal ions detection are discussed. This review presents an overall understanding, recent advances, current challenges and future outlook of QDs-based nanosensors for heavy metal detection.
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11
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Trends in sensor development toward next-generation point-of-care testing for mercury. Biosens Bioelectron 2021; 183:113228. [PMID: 33862396 DOI: 10.1016/j.bios.2021.113228] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/02/2021] [Accepted: 04/03/2021] [Indexed: 01/01/2023]
Abstract
Mercury is one of the most common heavy metals and a major environmental pollutant that affects ecosystems. Since mercury and its compounds are toxic to humans, even at low concentrations, it is very important to monitor mercury contamination in water and foods. Although conventional mercury detection methods, including inductively coupled plasma mass spectrometry, atomic absorption spectroscopy, and gas chromatography-mass spectrometry, exhibit excellent sensitivity and accuracy, they require operation by an expert in a sophisticated and fully controlled laboratory environment. To overcome these limitations and realize point-of-care testing, many novel methods for direct sample analysis in the field have recently been developed by improving the speed and simplicity of detection. Commonly, these unconventional sensors rely on colorimetric, fluorescence, or electrochemical mechanisms to transduce signals from mercury. In the case of colorimetric and fluorescent sensors, benchtop methods have gradually evolved through technology convergence to give standalone platforms, such as paper-based assays and lab-on-a-chip systems, and portable measurement devices, such as smartphones. Electrochemical sensors that use screen-printed electrodes with carbon or metal nanomaterials or hybrid materials to improve sensitivity and stability also provide promising detection platforms. This review summarizes the current state of sensor platforms for the on-field detection of mercury with a focus on key features and recent developments. Furthermore, trends for next-generation mercury sensors are suggested based on a paradigm shift to the active integration of cutting-edge technologies, such as drones, systems based on artificial intelligence, machine learning, and three-dimensional printing, and high-quality smartphones.
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12
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13
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Wang X, Ma J, Xu N, Wang Y, Sun J, Liu G. Three Zn( ii) coordination polymers constructed with a new amide-thiophene-derived bis-pyridyl ligand as ultrasensitive luminescent sensors for Hg( ii) and purines. CrystEngComm 2021. [DOI: 10.1039/d1ce00527h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A new amide-thiophene-derived ligand (4-bpft) was designed and used to construct three LCPs 1–3, which could detect Hg(ii), adenine, and guanine.
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Affiliation(s)
- Xiuli Wang
- College of Chemistry and Materials Engineering
- Bohai University
- Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- Jinzhou 121013
- P. R. China
| | - Jianxin Ma
- College of Chemistry and Materials Engineering
- Bohai University
- Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- Jinzhou 121013
- P. R. China
| | - Na Xu
- College of Chemistry and Materials Engineering
- Bohai University
- Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- Jinzhou 121013
- P. R. China
| | - Yue Wang
- College of Chemistry and Materials Engineering
- Bohai University
- Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- Jinzhou 121013
- P. R. China
| | - Jiayu Sun
- College of Chemistry and Materials Engineering
- Bohai University
- Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- Jinzhou 121013
- P. R. China
| | - Guocheng Liu
- College of Chemistry and Materials Engineering
- Bohai University
- Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell
- Jinzhou 121013
- P. R. China
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14
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Wang Z, Li S, Zhou C, Sun Y, Pang H, Liu W, Li X. Ratiometric fluorescent nanoprobe based on CdTe/SiO 2/folic acid/silver nanoparticles core-shell-satellite assembly for determination of 6-mercaptopurine. Mikrochim Acta 2020; 187:665. [PMID: 33205310 DOI: 10.1007/s00604-020-04628-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 10/28/2020] [Indexed: 11/24/2022]
Abstract
A sensitive and robust fluorescent assay of 6-MP is described which relies on the facile assembly of a fluorescence nanoprobe by design of silica nanosphere encapsulated CdTe quantum dots (CdTe QDs) as scaffold, coupling with chemically tethered folic acid (FA)-protected silver nanoparticles (AgNPs) that function as responsive element. In this way a stable ternary core-shell-satellite nanostructure with dual-emission signals can be established. On binding to the target molecules, 6-MP, FA molecules initially occupied by AgNPs are liberated to give dose-dependent fluorescence emission, which can further form a self-calibration ratiometric fluorescence assay using CdTe QDs as an internal reference. The nanoprobe color vividly changes from red to blue, enabling the direct visual detection. The linear concentration range is 0.15~50 μM with the detection limit of 67 nM. By virtue of the favorable selectivity and robust assays, the nanoprobe was applied to 6-MP detection in urine samples, with recoveries from 97.3 to 106% and relative standard deviations (RSD) less than 5%. Graphical abstract.
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Affiliation(s)
- Zhao Wang
- Pharmaceutical Analysis Division, School of Pharmacy, Guangxi Medical University, 22 Shuangyong Road, Nanning, 530021, People's Republic of China
| | - Shuting Li
- Pharmaceutical Analysis Division, School of Pharmacy, Guangxi Medical University, 22 Shuangyong Road, Nanning, 530021, People's Republic of China
| | - Chunyan Zhou
- Inorganic Chemistry Division, School of Pharmacy, Guangxi Medical University, 22 Shuangyong Road, Nanning, 530021, People's Republic of China
| | - Yingying Sun
- Pharmaceutical Analysis Division, School of Pharmacy, Guangxi Medical University, 22 Shuangyong Road, Nanning, 530021, People's Republic of China
| | - Hui Pang
- School of Preclinical Medicine, Guangxi Medical University, 22 Shuangyong Road, Nanning, 530031, People's Republic of China
| | - Wei Liu
- Biopharmaceutics and Pharmacokinetics Division, School of Pharmacy, Guangxi Medical University, 22 Shuangyong Road, Nanning, 530021, People's Republic of China.
| | - Xinchun Li
- Pharmaceutical Analysis Division, School of Pharmacy, Guangxi Medical University, 22 Shuangyong Road, Nanning, 530021, People's Republic of China.
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15
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Fluorescence paper-based sensor for visual detection of carbamate pesticides in food based on CdTe quantum dot and nano ZnTPyP. Food Chem 2020; 327:127075. [DOI: 10.1016/j.foodchem.2020.127075] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 05/07/2020] [Accepted: 05/14/2020] [Indexed: 11/20/2022]
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16
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Tong YJ, Qi JX, Song AM, Zhong XL, Jiang W, Zhang L, Liang RP, Qiu JD. Electronic synergy between ligands of luminol and isophthalic acid for fluorescence ratiometric detection of Hg2+. Anal Chim Acta 2020; 1128:11-18. [DOI: 10.1016/j.aca.2020.06.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 06/16/2020] [Accepted: 06/18/2020] [Indexed: 02/07/2023]
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17
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Yang YX, Fang YZ, Tian JX, Xiao Q, Kong XJ. Fluorescent polydopamine nanoparticles as a nanosensor for the sequential detection of mercury ions and l-ascorbic acid based on a coordination effect and redox reaction. RSC Adv 2020; 10:28164-28170. [PMID: 35519102 PMCID: PMC9055638 DOI: 10.1039/d0ra02031a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 07/11/2020] [Indexed: 12/04/2022] Open
Abstract
Herein, a novel fluorescence nanosensor using intrinsic fluorescent polydopamine nanoparticles (PDA NPs) as an effective signal reporter has been constructed for the simple, rapid and sequential detection of mercury ions (Hg2+) and l-ascorbic acid (AA) based on a coordination effect and redox reaction. The fluorescence of the PDA NPs could be specifically quenched by Hg2+ through intense coordination effects between the Hg2+ and the groups (catechol, amine, ketone and imine) on the surface of the PDA NPs. However, when AA and Hg2+ coexisted in solution, the fluorescence of the PDA NPs pronouncedly recovered via the redox reaction of Hg2+, with it being reduced to Hg0 by AA. The fluorescence quenching mechanism of Hg2+ towards the PDA NPs and the redox reaction between Hg2+ and AA were also fully investigated. The nanosensor exhibited high sensitivity and desirable selectivity for Hg2+ and AA detection. Moreover, the strategy was successfully explored in real samples (tap water, lake water and human serum samples) with satisfactory recoveries. The developed nanosensor provides new sights and good inspiration for Hg2+ and AA detection under real conditions.
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Affiliation(s)
- Yi-Xuan Yang
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013 P. R. China +86-791-86422903 +86-791-86422903
| | - Yan-Zhao Fang
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013 P. R. China +86-791-86422903 +86-791-86422903
| | - Jing-Xuan Tian
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013 P. R. China +86-791-86422903 +86-791-86422903
| | - Qiang Xiao
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013 P. R. China +86-791-86422903 +86-791-86422903
| | - Xiang-Juan Kong
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University Nanchang 330013 P. R. China +86-791-86422903 +86-791-86422903
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Huang T, Liu G, Yu J, Liu M, Huang Z, Li J, Li D. A New Portable Colorimetric Sensor Based on RGB Chromaticity for Quantitative Determination of Sarin in Water. CURR ANAL CHEM 2020. [DOI: 10.2174/1573411014666181023112032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Sarin is a nerve agent which is lethal to people due to its high toxicity. According
to its extreme toxicity, sarin, relatively lack of color, highly toxic, miscible in water, poses
viable threats to potable water sources. Therefore, there is an urgent need for portable, rapid and yet
reliable methods to monitor for adulteration of potable water sources by sarin on spot.
Methods:
A stock solution of 30 mg/L sarin was prepared daily by dissolving 300 μg of sarin in
10 mL isopropanol. A certain amount of sarin was added to the glass tube, and then o-dianisidine and
hydrogen peroxide were added. The pH value of the solution was adjusted to 9.8. The solution was
transferred to the test tube after 10 minutes. A test tube of 2 mL was placed between the light source
and the RGB color sensor. The LED light source illuminates directly over the test tube while the
RGB sensor obtained the generated spectral response. This RGB voltage output is connected to the
ADC and microcontroller to convert these analog voltages to three digital data. This RGB digital data
is linked to the microcomputer through the serial port that is interfaced with the user interface. The
data thus obtained in the sensor can be processed to display the sarin concentration.
Results:
Under the optimum conditions as described above, the calibration curve of chromaticity
value versus sarin concentration was linear in the range of 0.15 mg/L to 7.8 mg/L. According to the
IUPAC definition, theoretical detection limits of this method were 0.147 mg/L and 0.140 mg/L for R
and B values, respectively. The practical detection limit was 0.15 mg/L. The sensor was successfully
applied to the determination of sarin in artificial water samples and the recoveries were between
86.0% to 95.9%.
Conclusion:
The results in the present work have demonstrated the feasibility to design a new portable
colorimetric sensor based on the RGB chromaticity method for quantitative determination of sarin
in water. The influences of chromogenic reagent, oxidant, reaction time, o-dianisidine concentration,
hydrogen peroxide concentration, reaction temperature, pH on the chromaticity values were investigated.
The results showed that the sensor possessed high selectivity, sensitivity and good repeatability.
The method would be potentially applied to the analysis of other toxic compounds in
environment, such as other chemical warfare agents.
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Affiliation(s)
- Tingting Huang
- Department of Chemical Defence, Institute of NBC Defence, PLA Army, 102205, Beijing, China
| | - Guohong Liu
- Department of Chemical Defence, Institute of NBC Defence, PLA Army, 102205, Beijing, China
| | - Jingxiang Yu
- Department of Chemical Defence, Institute of NBC Defence, PLA Army, 102205, Beijing, China
| | - Meng Liu
- Department of Chemical Defence, Institute of NBC Defence, PLA Army, 102205, Beijing, China
| | - Zhiping Huang
- Department of Chemical Defence, Institute of NBC Defence, PLA Army, 102205, Beijing, China
| | - Jian Li
- Department of Chemical Defence, Institute of NBC Defence, PLA Army, 102205, Beijing, China
| | - Danping Li
- Department of Chemical Defence, Institute of NBC Defence, PLA Army, 102205, Beijing, China
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Chu H, Yao D, Chen J, Yu M, Su L. Double-Emission Ratiometric Fluorescent Sensors Composed of Rare-Earth-Doped ZnS Quantum Dots for Hg 2+ Detection. ACS OMEGA 2020; 5:9558-9565. [PMID: 32363308 PMCID: PMC7191836 DOI: 10.1021/acsomega.0c00861] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 04/08/2020] [Indexed: 05/08/2023]
Abstract
Quantum dots (QDs) are a class of zero-dimensional nanocrystal materials, whose lengths are limited to 2-10 nm. Their unique advantages such as wide excitation spectra, narrow emission spectra, and high quantum yield make their application possible in fluorescence sensing, wherein QDs such as CdSe, CdTe, and CdS are used. Indeed, QDs have a wide range of applications in fluorescence sensing, and there have been many reports of applications based on QDs as ion probes. The emission spectra of QDs can be adjusted by changing the size of the QDs or doping them with other ions/elements. However, the high toxicity of Cd and the poor anti-interference ability of single-emission fluorescent probes greatly limit the applications of QDs in many fields. In this paper, ZnS QDs are doped with the rare-earth element Ce to form a low-toxicity double-emission ratiometric fluorescent sensor, ZnS:Ce, for Hg2+ detection. The results of transmission electron microscopy (TEM), X-ray diffractometry, X-ray photoelectron spectroscopy, and optical spectroscopy show that ZnS:Ce QDs were successfully synthesized. Under the optimal conditions, the concentration of Hg2+ was in the range of 10-100 μM, which had a linear relationship with the fluorescence intensity of the ZnS:Ce QDs: the linear correlation coefficient was 0.998, and the detection limit was 0.82 μM L-1. In addition, the fluorescent sensor had good selectivity for Hg2+, and it was successfully applied to the detection of Hg2+ in laboratory water samples.
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20
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Low-cost Point-of-Care Biosensors Using Common Electronic Components as Transducers. BIOCHIP JOURNAL 2020. [DOI: 10.1007/s13206-020-4104-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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Yuan H, Zhao H, Peng K, Lv F, Liu L, Bao J, Wang S. Quantum Dots for Monitoring Choline Consumption Process of Living Cells via an Electrostatic Force-Mediated Energy Transfer. ACS APPLIED BIO MATERIALS 2019; 2:5528-5534. [PMID: 35021547 DOI: 10.1021/acsabm.9b00822] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In this work, a ratiometric nanoprobe CdS/ZnS-FB was designed for H2O2 detection based on FRET assay. Furthermore, CdS/ZnS-FB could work for detecting choline (Ch) and acetylcholine (ACh) since H2O2 is the enzyme cascade reaction product. Significantly, the Jurkat T's choline consumption could also be quantitatively measured by monitoring FRET ratio (I522/I426). Thus, the biosensor could be applied as a universal tool for the detection of choline consumption of living cells, which provides a good potential for the applications in detecting chemical transmitter and cancer diagnosis.
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Affiliation(s)
- Haitao Yuan
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Hao Zhao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, P. R. China
| | - Ke Peng
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, P. R. China
| | - Fengting Lv
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, P. R. China
| | - Libing Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, P. R. China
| | - Jianchun Bao
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, P. R. China
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22
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Xu L, Shi Q, Tang BC, Xie S. A New Plant Indicator ( Artemisia lavandulaefolia DC.) of Mercury in Soil Developed by Fourier-Transform Near-Infrared Spectroscopy Coupled with Least Squares Support Vector Machine. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2019; 2019:3240126. [PMID: 31583158 PMCID: PMC6754876 DOI: 10.1155/2019/3240126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
A rapid indicator of mercury in soil using a plant (Artemisia lavandulaefolia DC., ALDC) commonly distributed in mercury mining area was established by fusion of Fourier-transform near-infrared (FT-NIR) spectroscopy coupled with least squares support vector machine (LS-SVM). The representative samples of ALDC (stem and leaf) were gathered from the surrounding and distant areas of the mercury mines. As a reference method, the total mercury contents in soil and ALDC samples were determined by a direct mercury analyzer incorporating high-temperature decomposition, catalytic adsorption for impurity removal, amalgamation capture, and atomic absorption spectrometry (AAS). Based on the FT-NIR data of ALDC samples, LS-SVM models were established to distinguish mercury-contaminated and ordinary soil. The results of reference analysis showed that the mercury level of the areas surrounding mercury mines (0-3 kilometers, 7.52-88.59 mg/kg) was significantly higher than that of the areas distant from mercury mines (>5 kilometers, 0-0.75 mg/kg). The LS-SVM classification model of ALDC samples was established based on the original spectra, smoothed spectra, second-derivative (D2) spectra, and standard normal transformation (SNV) spectra, respectively. The prediction accuracy of D2-LS-SVM was the highest (0.950). FT-NIR combined with LS-SVM modeling can quickly and accurately identify the contaminated ALDC. Compared with traditional methods which rely on naked eye observation of plants, this method is objective and more sensitive and applicable.
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Affiliation(s)
- Lu Xu
- College of Material and Chemical Engineering, Tongren University, Tongren 554300, Guizhou, China
| | - Qiong Shi
- The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central University for Nationalities, Wuhan 430074, China
| | - Bang-Cheng Tang
- College of Material and Chemical Engineering, Tongren University, Tongren 554300, Guizhou, China
| | - Shunping Xie
- Technology Center, China Tobacco Guizhou Industrial Co., Ltd., Guiyang 550009, Guizhou, China
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23
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An indirect ELISA-inspired dual-channel fluorescent immunoassay based on MPA-capped CdTe/ZnS QDs. Anal Bioanal Chem 2019; 411:5437-5444. [PMID: 31300858 DOI: 10.1007/s00216-019-01917-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/22/2019] [Accepted: 05/14/2019] [Indexed: 01/11/2023]
Abstract
To meet the need for high-throughput immunoassays, many multiplex fluorescent immunoassays have been proposed. Most of them need different kinds of fluorescent label indicators during the test. In this work, a novel indirect ELISA-inspired dual-channel fluorescent immunoassay based on 3-mercaptopropionic acid capped CdTe/ZnS quantum dots (QDs) was constructed. The ELISA wells were coated with two kinds of antigen-QD complex. When the primary antibodies were present in a sample, they mediated the binding of a secondary antibody-DNA-gold nanoparticle complex to the antigen-QD complex. Then the gold nanoparticles quenched the fluorescence of the QDs and a decrease in fluorescence intensity was observed. Thus, the amount of primary antibody could be estimated from the decrease of fluorescence intensity. Owing to the wide absorption range and the relatively narrow emission band of the QDs, the dual-channel fluorescent immunoassay system could work at the same excitation wavelength and the emission wavelengths of each channel had no interference. As a result, two different kinds of primary antibody could be detected at the same time in one ELISA well, which simplified the operation and greatly improved the efficiency. Besides, only one type of secondary antibody needs to be added to the prepared microtiter plates, which further simplified the operation during the detection procedure. This dual-channel fluorescent immunoassay system will provide new insights into high-throughput immunodetection. Graphical abstract.
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Tang Z, Yang J, Li G, Hu Y. Synthesis of sulfur-rich nitrogen dots from a single source precursor and its application in dual-mode sensing. Talanta 2019; 195:550-557. [DOI: 10.1016/j.talanta.2018.11.079] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/14/2018] [Accepted: 11/22/2018] [Indexed: 01/22/2023]
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25
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A portable ratiometric fluorescent strip for sensitive determination of mercuric ions. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.01.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Jin H, Zhang M, Wei M, Cheng JH. A voltammetric biosensor for mercury(II) using reduced graphene oxide@gold nanorods and thymine-Hg(II)-thymine interaction. Mikrochim Acta 2019; 186:264. [DOI: 10.1007/s00604-019-3372-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 03/20/2019] [Indexed: 01/19/2023]
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27
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Zhang D, Yao Y, Wu J, Protsak I, Lu W, He X, Xiao S, Zhong M, Chen T, Yang J. Super Hydrophilic Semi-IPN Fluorescent Poly(N-(2-hydroxyethyl)acrylamide) Hydrogel for Ultrafast, Selective, and Long-Term Effective Mercury(II) Detection in a Bacteria-Laden System. ACS APPLIED BIO MATERIALS 2019; 2:906-915. [DOI: 10.1021/acsabm.8b00761] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Dong Zhang
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yingchun Yao
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jiahui Wu
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Iryna Protsak
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Wei Lu
- Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
| | - Xiaomin He
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Shengwei Xiao
- Department of Polymer Science and Engineering, School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Mingqiang Zhong
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Tao Chen
- Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Jintao Yang
- College of Materials Science & Engineering, Zhejiang University of Technology, Hangzhou 310014, China
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28
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Chen B, Liu J, Yang T, Chen L, Hou J, Feng C, Huang CZ. Development of a portable device for Ag + sensing using CdTe QDs as fluorescence probe via an electron transfer process. Talanta 2018; 191:357-363. [PMID: 30262071 DOI: 10.1016/j.talanta.2018.08.088] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/25/2018] [Accepted: 08/31/2018] [Indexed: 02/03/2023]
Abstract
Ag+ as one of the most commonly seen toxic heavy metal ions is involved in numerous vital biological processes, which would cause fatal damages and environmental contamination when Ag+ is excessive. In the present work, CdTe quantum dots (QDs) with green, orange, and red emission capped by mercaptoacetic acid (TGA) were synthesized at one time by controlling the synthesis time and utilized for Ag+ detection. Both fluorescence spectral red-shift and intensity decrease could be used for Ag+ discrimination. Fluorescence lifetime, Zeta potential, and XRD, etc. were carried out to analyze the detection mechanism. Results displayed that surface passivation and electron transfer due to binding effects of Ag+ to Te atom on traps of QDs could be relied on to explain the sensing mechanism. Additionally, in accordance with PCA analysis, Ag+ could be also be successfully differentiated from Hg2+ and the other metal ions. Importantly, a home-made portable device based on a 32 bit embed Micro Control Unit (MCU) system was first proposed for Ag+ detection. The power supply system adopt the mini-sized lithium cell instead of the power supply system, which ensure its practical applicability. The relative position of light source and detector is set at 90° to minimize the interference. According to the detection results, the linear detection range using the device was from 5 nM to 200 nM (with a larger coefficient of determination, R2), and the detection limit was calculated to be about 5 nM, which indicated that this proposed method and device could fulfil the practical application requirements.
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Affiliation(s)
- Bin Chen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Chongqing Key Laboratory of Non-linear Circuit and Intelligent Information Processing, College of Electronic and Information Engineering, Southwest University, Chongqing 400715, China; Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, China
| | - Junjie Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, China
| | - Tong Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, China
| | - Lin Chen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, China
| | - Jia Hou
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, China
| | - Changhao Feng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Chongqing Key Laboratory of Non-linear Circuit and Intelligent Information Processing, College of Electronic and Information Engineering, Southwest University, Chongqing 400715, China; Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, China
| | - Cheng Zhi Huang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, China.
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29
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Liu Y, Ouyang Q, Li H, Chen M, Zhang Z, Chen Q. Turn-On Fluoresence Sensor for Hg 2+ in Food Based on FRET between Aptamers-Functionalized Upconversion Nanoparticles and Gold Nanoparticles. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6188-6195. [PMID: 29847117 DOI: 10.1021/acs.jafc.8b00546] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In this study, a turn-on nanosensor for detecting Hg2+ was developed based on the fluorescence resonance energy transfer (FRET) between long-strand aptamers-functionalized upconversion nanoparticles (UCNPs) and short-strand aptamers-functionalized gold nanoparticles (GNPs). In the absence of Hg2+, FRET between UCNPs and GNPs occurred because of the specific matching between two aptamers, resulting in the fluorescence quenching of UCNPs. In the presence of Hg2+, long-stranded aptamers fold back into a hairpin structure due to the stable binding interactions between Hg2+ and thymine, leading to the release of GNPs from UCNPs, resulting in the quenched fluorescence restoration. Under the optimized conditions, the nanosensor achieved a linear detection range of 0.2-20 μM and a low detection limit (LOD) of 60 nM. Meanwhile, it showed good selectivity and has been applied to detecting Hg2+ in tap water and milk samples with good precision.
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Affiliation(s)
- Yan Liu
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Qin Ouyang
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Huanhuan Li
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Min Chen
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Zhengzhu Zhang
- State Key Laboratory of Tea Plant Biology and Utilization , Anhui Agricultural University , Hefei 210036 , China
| | - Quansheng Chen
- School of Food and Biological Engineering , Jiangsu University , Zhenjiang 212013 , China
- State Key Laboratory of Tea Plant Biology and Utilization , Anhui Agricultural University , Hefei 210036 , China
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30
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Cai N, Yang D, He Y, Chen F. Enhanced chemiluminescence of the fluorescein-KIO4
system by CdTe quantum dots for determination of catechol. LUMINESCENCE 2018; 33:871-876. [DOI: 10.1002/bio.3484] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 02/12/2018] [Accepted: 02/22/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Na Cai
- The Key Laboratory of Luminescence and Real-time Analytical Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering; Southwest University; Chongqing P. R. China
| | - DongQin Yang
- The Key Laboratory of Luminescence and Real-time Analytical Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering; Southwest University; Chongqing P. R. China
| | - YanYan He
- Zunyishi Naibai Middle School; Guizhou P. R. China
| | - FuNan Chen
- The Key Laboratory of Luminescence and Real-time Analytical Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering; Southwest University; Chongqing P. R. China
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31
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Luo L, Song T, Wang H, Yuan Q, Zhou S. A highly selective fluorescence sensing platform for nanomolar Hg(II) detection based on cytosine derived quantum dot. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 193:95-101. [PMID: 29223059 DOI: 10.1016/j.saa.2017.11.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 11/09/2017] [Accepted: 11/20/2017] [Indexed: 06/07/2023]
Abstract
Inspired by low toxicity and good biocompatibility of biomass derived quantum dot (QD), we herein developed a cytosine derived quantum dot, namely cyt-dot, via a one-step hydrothermal synthesis. The as-prepared cyt-dot emits blue fluorescence (FL) containing abundant oxygen (20.6at.%) and nitrogen (24.1at.%) contents. The cyt-dot based sensing platform shows exclusive selectivity for Hg(II) while being insensitive towards Fe(III) and Ag(I), which are important interference that usually cannot be ruled out. The detection limit for Hg(II) is of 11nM, which is very close to the guideline value of 10nM allowed by the U.S. Environmental Protection Agency in drinking water. In real water sample analyses, the present sensing platform can fulfil satisfied recoveries ranging from 100% to 108%. Besides, the acidity of solution has almost no effect on the sensing performance of the cyt-dot in a pH range of 5-8, suggesting its potential applications in sensing and bio-imaging.
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Affiliation(s)
- Liang Luo
- Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ting Song
- Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haoqiang Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Qunhui Yuan
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.
| | - Shenghai Zhou
- College of Chemistry and Chemical Engineering, Hebei Normal University for Nationalities, Chengde 067000, China; Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China
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32
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Pan X, Zhang Y, Sun X, Pan W, Wang J. A green emissive carbon-dot-based sensor with diverse responsive manners for multi-mode sensing. Analyst 2018; 143:5812-5821. [DOI: 10.1039/c8an01552j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Multi-mode sensing for Hg2+, lemon yellow, H2O2 and Fe2+ achieved by a green emissive carbon-dot-based sensor with diverse responsive manners.
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Affiliation(s)
- Xiaohua Pan
- College of Chemical and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- PR China
| | - Yan Zhang
- College of Chemical and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- PR China
| | - Xiaobo Sun
- College of Chemical and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- PR China
| | - Wei Pan
- College of Chemical and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- PR China
| | - Jinping Wang
- College of Chemical and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- PR China
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