1
|
Ran M, Qi H, Jing T, Li J, Li W, Zhang J, Luo C, Zhu X, Gao Y. Ultrasensitive pH-switchablenitrogen doped carbon dots for MnO 4- detection and fluorescent anti-counterfeiting. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 323:124907. [PMID: 39094272 DOI: 10.1016/j.saa.2024.124907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Revised: 07/27/2024] [Accepted: 07/29/2024] [Indexed: 08/04/2024]
Abstract
Herein, high-efficiency green fluorescence nitrogen doped CDs (G-CDs) were prepared using acetaminophen and ethylenediamine as precursors. The G-CDs exhibited good anti-photobleaching, salttolerance and low cytotoxicity. Interestingly, the G-CDs revealed excellent fluorescence stability in the pH range of 6-12, however, the intensity of the G-CDs was almost completely quenched in other pH values. The MnO4- demonstrated strong fluorescence quenching capability on our G-CDs with the mechanism involving dynamic quenching caused by energy transfer. G-CDs exhibited a strong linear relationship with MnO4- concentration in the range of 0-75 μmol/L, with a low limit detection of 7.6 nmol/L. What was even more interesting was that the G-CDs displayed bright green solid-state fluorescence, and exhibited potential application in anti-counterfeiting.
Collapse
Affiliation(s)
- Maoxia Ran
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China
| | - Haiyan Qi
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China.
| | - Tao Jing
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China
| | - Jun Li
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China
| | - Wenbo Li
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China
| | - Jiayu Zhang
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China
| | - Chao Luo
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China
| | - Xiaochen Zhu
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China
| | - Yang Gao
- College of Chemistry and Chemical Engineering, Qiqihar University, No. 42, Wenhua Street, Qiqihar 161006, China
| |
Collapse
|
2
|
Peng L, Guo H, Wu N, Liu Y, Wang M, Liu B, Tian J, Wei X, Yang W. Ratiometric fluorescent sensor based on metal-organic framework for selective and sensitive detection of CO 32. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 299:122844. [PMID: 37196552 DOI: 10.1016/j.saa.2023.122844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/12/2023] [Accepted: 05/06/2023] [Indexed: 05/19/2023]
Abstract
Carbonate ion (CO32-) is an anion essential for the maintenance of life activities and is of great importance to human health. Here, a novel ratiometric fluorescent probe Eu/CDs@UiO-66-(COOH)2 (ECU) was prepared by introducing europium ions (Eu3+) and carbon dots (CDs) into the UiO-66-(COOH)2 parent framework under the guidance of a post-synthetic modification strategy and used for the detection of CO32- ion in the aqueous environment. Interestingly, when CO32- ions were added to the ECU suspension, the characteristic emission of carbon dots at 439 nm was significantly enhanced, while the characteristic emission of Eu3+ ions at 613 nm was reduced. Therefore, the detection of CO32- ions can be realized through the peak height ratio of the two emissions. The probe had a low detection limit (about 1.08 μM) and a wide linear range (0-350 μM) for the detection of carbonate. In addition, the presence of CO32- ions can cause a significant ratiometric luminescence response and resulted obvious red-to-blue color shift of the ECU under UV light, which will facilitate visual analysis by the naked eye.
Collapse
Affiliation(s)
- Liping Peng
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China
| | - Hao Guo
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China.
| | - Ning Wu
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China
| | - Yinsheng Liu
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China
| | - Mingyue Wang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China
| | - Bingqing Liu
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China
| | - Jiaying Tian
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China
| | - Xiaoqin Wei
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China
| | - Wu Yang
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China; Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou 730070, PR China.
| |
Collapse
|
3
|
Naik VM, Bhosale SV, Kolekar GB. A brief review on the synthesis, characterisation and analytical applications of nitrogen doped carbon dots. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:877-891. [PMID: 35174374 DOI: 10.1039/d1ay02105b] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Since their discovery in 2004, fluorescent carbon nanoparticles have been tremendously studied due to their tunable optical properties. Recent studies on the synthesis and application of doped carbon dots highlight the effortless doping strategy with high quantum yields and applications in diverse fields. Among these, nitrogen doped carbon dots (NCDs) have been extensively investigated for their potential analytical and biological applications. This review features the synthetic methods and important characterisation studies required to verify successful synthesis of nitrogen doped carbon dots. Analytical applications of NCDs in metal ion, biomolecule, temperature, pH and gas sensing along with cell imaging and drug delivery applications are also discussed.
Collapse
Affiliation(s)
- Vaibhav M Naik
- P. E. S's. Ravi S. Naik College of Arts and Science, Farmagudi, Ponda, Goa, India
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur-416004, Maharashtra, India.
| | - Sheshanath V Bhosale
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa 403206, India.
| | - Govind B Kolekar
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur-416004, Maharashtra, India.
| |
Collapse
|
4
|
Yang C, Du C, Su R, Wang J, Li Y, Ma X, Li Z, Sun C. A signal-on fluorescent aptasensor by sensitized Tb 3+ luminescence for detection of melamine in milk. Talanta 2022; 236:122842. [PMID: 34635232 DOI: 10.1016/j.talanta.2021.122842] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/29/2021] [Accepted: 08/31/2021] [Indexed: 10/20/2022]
Abstract
A fluorescent aptasensor based on sensitized terbium(III) luminescence was constructed to detect melamine in milk. Tb3+ as the fluorescence probe can be sensitized by a guanine-rich single-stranded DNA sequence, so the complementary sequence of the polythymidine aptamer (cDNA) was modified with six consecutive guanine bases (G6). In the absence of melamine, melamine aptamer combined with cDNA to form a double helix structure, and G6 hybridized with the extended cytosine bases in the aptamer, resulting in low fluorescence intensity of Tb3+. In the presence of melamine, cDNA was released due to the specific recognition of melamine to the aptamer, resulting in stronger sensitized fluorescence intensity of Tb3+. Under the optimum conditions, the linear concentration of melamine in the milk ranged from 1.0 μg/mL to 10.0 μg/mL. This aptasensor can be used for the accurate and rapid detection of melamine in milk with a detection limit of 0.02 μg/mL, and has the advantages of high sensitivity, high efficiency, simple operation and low cost.
Collapse
Affiliation(s)
- Chuanyu Yang
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Caiyi Du
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Ruifang Su
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Junyang Wang
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Ying Li
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Xinyue Ma
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Zhihong Li
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun, 130062, China
| | - Chunyan Sun
- Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun, 130062, China.
| |
Collapse
|
5
|
Yu C, Li L, Ding Y, Liu H, Cui H, Zhang F, Lin J, Duan Y. A sensitive molecularly imprinted electrochemical aptasensor for highly specific determination of melamine. Food Chem 2021; 363:130202. [PMID: 34304106 DOI: 10.1016/j.foodchem.2021.130202] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 05/19/2021] [Accepted: 05/22/2021] [Indexed: 12/29/2022]
Abstract
An electrochemical aptamer sensor based on gold nanoparticles (AuNPs) was developed for highly specific sensing of melamine (MEL), which combines molecularly imprinted polymers (MIPs) and aptamers. AuNPs were synthesized by simple reduction of sodium citrate and characterized by transmission electron microscopy. The MIP membranes with particular recognition sites were formed by electropolymerization of dopamine (DA) with polythymine (poly T) aptamers as functional monomers and melamine as template molecules. Under optimal experimental conditions, this molecularly imprinted electrochemical aptamer sensor (MIEAS) exhibits a linear relationship between 10-12 M and 10-4 M for detecting MEL with the detection limit of 6.7 × 10-13 M. Moreover, this sensor displays excellent selectivity, reproducibility and stability. The milk samples analysis has confirmed the potential application of this MIEAS to quantitative detection of melamine.
Collapse
Affiliation(s)
- Chenhong Yu
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Li Li
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Yaping Ding
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China.
| | - Huajie Liu
- School of Chemical Science and Engineering, Tongji University, Shanghai 200092, PR China.
| | - Hanyue Cui
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Fenfen Zhang
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, PR China
| | - Jiaxin Lin
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| | - Yingchun Duan
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, PR China
| |
Collapse
|
6
|
Cerra S, Salamone TA, Sciubba F, Marsotto M, Battocchio C, Nappini S, Scaramuzzo FA, Li Voti R, Sibilia C, Matassa R, Beltrán AM, Familiari G, Fratoddi I. Study of the interaction mechanism between hydrophilic thiol capped gold nanoparticles and melamine in aqueous medium. Colloids Surf B Biointerfaces 2021; 203:111727. [PMID: 33819818 DOI: 10.1016/j.colsurfb.2021.111727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/12/2021] [Accepted: 03/24/2021] [Indexed: 11/17/2022]
Abstract
In the last years, intense efforts have been made in order to obtain colloidal-based systems capable of pointing out the presence of melamine in food samples. In this work, we reported about the recognition of melamine in aqueous solution, using gold nanoparticles stabilized with 3-mercapto-1-propanesulfonate (AuNPs-3MPS), with the aim of deepening how the recognition process works. AuNPs were synthesized using a wet chemical reduction method. The synthesized AuNPs-3MPS probe was fully characterized, before and after the recognition process, by both physicochemical (UV-vis, FT-IR, 1H-NMR, DLS and ζ-potential) and morphostructural techniques (AFM, HR-TEM). The chemical and electronic structure was also investigated by SR-XPS. The sensing method is based on the melamine-induced aggregation of AuNPs; the presence of melamine was successfully detected in the range of 2.5-500 ppm. The results achieved also demonstrate that negatively charged AuNPs-3MPS are potentially useful for determining melamine contents in aqueous solution. SR-XPS measurements allowed to understand interaction mechanism between the probe and the analyte. The presence of sulfonate groups allows a mutual interaction mediated by electrostatic bonds between nanoparticles surface thiols and positively charged amino groups of melamine molecules.
Collapse
Affiliation(s)
- Sara Cerra
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy.
| | - Tommaso A Salamone
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy
| | - Fabio Sciubba
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy
| | - Martina Marsotto
- Department of Sciences and CISDiC, Roma Tre University, Via della Vasca Navale 79, 00146, Rome, Italy
| | - Chiara Battocchio
- Department of Sciences and CISDiC, Roma Tre University, Via della Vasca Navale 79, 00146, Rome, Italy
| | - Silvia Nappini
- IOM CNR, Laboratorio TASC, S.S. 14 Km 163.5 AREA Science Park Basovizza, Trieste, 34149, Italy
| | - Francesca A Scaramuzzo
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Roberto Li Voti
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Concita Sibilia
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Antonio Scarpa 14, 00161, Rome, Italy
| | - Roberto Matassa
- Department of Anatomical, Histological, Forensic and Orthopaedic Sciences, Section of Human Anatomy, Sapienza University of Rome, Via A. Borelli 50, 00161, Rome, Italy
| | - Ana Maria Beltrán
- Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, Universidad de Sevilla, Virgen de África 7, 41011, Seville, Spain
| | - Giuseppe Familiari
- Department of Anatomical, Histological, Forensic and Orthopaedic Sciences, Section of Human Anatomy, Sapienza University of Rome, Via A. Borelli 50, 00161, Rome, Italy
| | - Ilaria Fratoddi
- Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, 00185, Rome, Italy.
| |
Collapse
|
7
|
Azarian S, Shaghaghi M, Dehghan G, Sheibani N. A rapid, simple and ultrasensitive spectrofluorimetric method for the direct detection of metformin in real samples based on a nanoquenching approach. LUMINESCENCE 2020; 36:658-667. [PMID: 33185014 DOI: 10.1002/bio.3982] [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: 07/27/2020] [Revised: 10/08/2020] [Accepted: 11/07/2020] [Indexed: 11/07/2022]
Abstract
Metformin (MET), as an oral antidiabetic and antihyperglycemic agent, is widely used to treat type II diabetes mellitus. Because of its increasing consumption, developing a fast, simple, and selective method to determine its concentration in biological samples (serum and urine) and pharmaceutical formulations (tablets) is of great interest. In this study, we used a FRET-based fluorescent nanosensor (Tb-phen-AgNPs system) for sensitive detection of MET in tablet and serum samples. This method is based on the enhancing effect of MET on the emission intensity of the Tb-phen complex, which is quenched by AgNPs via energy transfer process (turn off-on mode). A good linear relationship between the MET concentration and enhanced emission intensity of the Tb-phen-AgNPs system was observed in the range of (0.75-3.7) × 10-6 M under optimum conditions. Limit of detection and limit of quantitation were calculated to be 0.43 × 10-6 M and 1.31 × 10-6 M, respectively. This method was successfully used to determine MET concentrations in pharmaceutical dosage form and in spiked serum sample. The obtained recoveries from pharmaceutical formulation and serum sample were in the range 86.75-98.97% and 85.10-100.96%, respectively. Collectively, our results indicated that the method described here is simple, sensitive, cost effective, and free from interference. Therefore, it can be used as an effective and routine method for the direct and rapid determination of MET levels in biological samples such as serum.
Collapse
Affiliation(s)
- Sina Azarian
- Department of Animal Biology, Faculty of Natural Science, University of Tabriz, Tabriz, Iran
| | - Masoomeh Shaghaghi
- Department of Chemistry, Payame Noor University, P. O. Box, Tehran, Iran
| | - Gholamreza Dehghan
- Department of Animal Biology, Faculty of Natural Science, University of Tabriz, Tabriz, Iran
| | - Nader Sheibani
- Departments of Ophthalmology and Visual Sciences, Cell and Regenerative Biology, and Biomedical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| |
Collapse
|
8
|
Determination of melamine and melamine–Cu(II) complexes in milk using a DNA-Ag hydrocolloid as the sensor. Food Chem 2020; 311:125889. [DOI: 10.1016/j.foodchem.2019.125889] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/01/2019] [Accepted: 11/10/2019] [Indexed: 02/05/2023]
|
9
|
Wang S, Fu J, Zhang F, Huan R, Liu T, Zeng X. Highly Selective Detection of Metronidazole by Self-Assembly via 0D/2D N-C QDs/g-C 3N 4 Nanocomposites Through FRET Mechanism. NANOSCALE RESEARCH LETTERS 2020; 15:87. [PMID: 32307591 PMCID: PMC7167395 DOI: 10.1186/s11671-020-3294-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 03/04/2020] [Indexed: 06/11/2023]
Abstract
A 0D/2D (0-dimensional/2-dimensional) nanostructure was designed by self-assembly of N-C QDs and carboxylated g-C3N4 nanosheets and used as a fluorescence resonance energy transfer (FRET) fluorescent sensor. The N-C QDs/g-C3N4 nanosheets were synthesized via the amino group on the N-C QD surface and the -COOH of the carboxylated g-C3N4 nanosheets. The mechanism of detection of metronidazole (MNZ) by N-C QDs/g-C3N4 nanocomposites is based on FRET between negatively charged N-QDs and positively charged carboxylated g-C3N4 nanoparticles. N-C QDs/g-C3N4 nanostructures displayed good responses for the detection of MNZ at normal temperature and pressure. The decrease in the fluorescence intensity showed a good linear relationship to MNZ concentration within 0-2.6 × 10-5 mol/L, and the detection limit was 0.66 μM. The novel FRET sensor will have a great potential in clinical analysis and biological studies.
Collapse
Affiliation(s)
- Shan Wang
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, People's Republic of China.
| | - Jing Fu
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, People's Republic of China
| | - Fang Zhang
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, People's Republic of China
| | - Ruirui Huan
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, People's Republic of China
| | - Ting Liu
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, People's Republic of China
| | - Xingguo Zeng
- School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang, 712000, People's Republic of China
| |
Collapse
|