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Pu ZF, Wen QL, Wu BC, Li CH, Li RS, Ling J, Cao Q. Synthesis of shape-controlled covalent organic frameworks for light scattering detection of iron and chromium ions. Talanta 2024; 279:126682. [PMID: 39116734 DOI: 10.1016/j.talanta.2024.126682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 07/25/2024] [Accepted: 08/05/2024] [Indexed: 08/10/2024]
Abstract
Fabricating covalent organic frameworks with different morphologies based on the same structural motifs is both interesting and challenging. Here, a TTA-TFP-COF was synthesized by both solvothermal and room temperature methods, with 2,4,6-Tris(4-aminophenyl)-1,3,5-triazine (TTA) and 1,3,5-tris(4-formylphenyl)-benzene (TFP) as raw material. Using different synthesis conditions and adding aniline and benzaldehyde as regulators in the synthesis process, we found that these processes could slow down the reaction speed, increase the exchange and metathesis reactions of dynamic reversible reactions, and improve the reversibility of the reaction system. Thus, controllable synthesis of TTA-TFP-COF with different morphologies, including micro-particles, hollow tubes with controllable diameters, and micro-flowers was achieved. Our further study found that metal ions, Fe3+ and Cr3+ ions, could coordinate with N and O in TTA-TFP-COF and partially destroy the structure of TTA-TFP-COF. The particle size of the TTA-TFP-COF became smaller, thus resulting in the decrease of the light scattering intensity of the COF. An excellent linear relationship exists between the light scattering changes (ΔI) and metal ions concentration (c) from 2.0 to 350.0 μM for Fe3+ and 40.0-800.0 μM for Cr3+, respectively. Thus, rapid and selective analytical methods for detecting metal ions were developed by TTA-TFP-COF here.
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Affiliation(s)
- Zheng-Fen Pu
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650500, China
| | - Qiu-Lin Wen
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650500, China; School of Chemistry and Chemical Engineering, Kunming University, Kunming, 650214, China
| | - Bi-Chao Wu
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650500, China
| | - Chun-Hua Li
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650500, China
| | - Rong Sheng Li
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650500, China
| | - Jian Ling
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650500, China.
| | - Qiue Cao
- Key Laboratory of Medicinal Chemistry for Natural Resource (Yunnan University), Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming, 650500, China.
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2
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Zhou Q, Wang X, Tang K, Chen Y, Wang R, Lei H, Yang Z, Zhang Z. Developing portable and controllable fluorescence capillary imprinted sensor for visual detection Crohn's disease biomarkers. Talanta 2024; 278:126402. [PMID: 38924985 DOI: 10.1016/j.talanta.2024.126402] [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: 02/24/2024] [Revised: 05/25/2024] [Accepted: 06/09/2024] [Indexed: 06/28/2024]
Abstract
Simultaneous detection of multiple biomarker levels is essential to improve the accuracy of early diagnosis. Introducing capillary will simplify procedure, less time, and reduce reagent consumption for point-of-care testing of biomarkers. Here, we developed a portable and controllable smartphone-integrated fluorescence capillary imprinted sensing platform for the accuracy visual detection of Crohn's disease biomarkers (lysozyme, Fe3+) using single-excitation/double-signal detection. A novel controllable capillary coating strategy was developed by static gas-driven coating method for synthesis uniform fluorescence capillary imprinted sensor (Si-CD/g-CdTe@MIP capillary sensor). When Fe3+ and lysozyme were added, the fluorescence intensity of Si-CD/g-CdTe@MIP capillary sensor was quenched at 426 nm and enhanced at 546 nm, respectively. This Si-CD/g-CdTe@MIP capillary sensor has high sensitivity and selectivity for quantification lysozyme and Fe3+ simultaneously with the detection limit of 0.098 nM and 0.20 nM, respectively. In addition, the smartphone-integrated Si-CD/g-CdTe@MIP capillary sensor was applied for the intelligent detection of lysozyme and Fe3+, in which the detection limit was calculated as 0.32 nM and 0.65 nM. The smartphone-integrated visual Si-CD/g-CdTe@MIP capillary sensor realized ultrasensitive microanalysis (18 μL/time) of biomarkers in health man and Crohn 's patients, providing a novel strategy for early diagnosis of Crohn 's disease.
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Affiliation(s)
- Qin Zhou
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, PR China; Ley Laboratory of Medicinal Resources Chemistry and Pharmacology in Wuling Mountainous of Hunan Province College, Jishou University, Jishou, 416000, PR China
| | - Xiangni Wang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, PR China; Ley Laboratory of Medicinal Resources Chemistry and Pharmacology in Wuling Mountainous of Hunan Province College, Jishou University, Jishou, 416000, PR China
| | - Kangling Tang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, PR China
| | - Yu Chen
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, PR China
| | - Ruoyan Wang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, PR China; Ley Laboratory of Medicinal Resources Chemistry and Pharmacology in Wuling Mountainous of Hunan Province College, Jishou University, Jishou, 416000, PR China
| | - Huibin Lei
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, PR China
| | - Zhaoxia Yang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, PR China
| | - Zhaohui Zhang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou, 416000, PR China; Ley Laboratory of Medicinal Resources Chemistry and Pharmacology in Wuling Mountainous of Hunan Province College, Jishou University, Jishou, 416000, PR China.
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Ma Y, Mao L, Cui C, Hu Y, Chen Z, Zhan Y, Zhang Y. Nitrogen-doped carbon dots as fluorescent probes for sensitive and selective determination of Fe 3. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 316:124347. [PMID: 38678843 DOI: 10.1016/j.saa.2024.124347] [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: 01/04/2024] [Revised: 04/07/2024] [Accepted: 04/23/2024] [Indexed: 05/01/2024]
Abstract
At present, the contamination of water resources by heavy metal ions has posed a significant threat to human survival. Therefore, it is particularly critical to develop low-cost, easy-to-use, and highly efficient heavy metal detection technologies. In this work, a fast and cost-effective fluorescent probe for nitrogen-doped carbon dots (N-CDs) was prepared using one-step hydrothermal method with citric acid (CA) as carbon source, and melamine as nitrogen source. The structural and optical characterizations of the resulting N-CDs were investigated in details. The results showed that the quantum yield of the prepared fluorescent probe was as high as 45 %, and an average fluorescence lifetime was about 7.80 ns. N-CDs have excellent water solubility and dispersibility, with an average size of 2.58 nm. N-CDs exhibited excellent specific responsiveness to Fe3+ and can be used as an effective method for detecting Fe3+ at low-concentrations (the concentrations of N-CDs as low as 0.24 μg/mL) using fluorescent probes. The linear response of the fluorescent probe N-CDs to Fe3+ was formed in the concentration range of 20-80 μM, and the detection limit was 3.18 μM. In addition, in the actual water samples analysis, the recovery rate reached 97.05-100.58 %. The prepared of N-CDs provide available Fe3+ fluorescent probes in the environment.
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Affiliation(s)
- Yulin Ma
- Ministry-of- Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Linhan Mao
- Ministry-of- Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Congcong Cui
- Ministry-of- Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yong Hu
- Ministry-of- Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Zhaoxia Chen
- Ministry-of- Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yuan Zhan
- Ministry-of- Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Yuhong Zhang
- Ministry-of- Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
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Cai Z, Li H, Yang X, Zhang M, Guo J, Su Y, Liu T. Blue-emitting tryptophan-protected gold nanoclusters acted as a sensitive nanosensor for fluorescence sensing and visual imaging detection of furaltadone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 308:123748. [PMID: 38091651 DOI: 10.1016/j.saa.2023.123748] [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: 10/02/2023] [Revised: 11/09/2023] [Accepted: 12/08/2023] [Indexed: 01/13/2024]
Abstract
Herein, blue-emitting gold nanoclusters (Au NCs) were carried out through tryptophan as the protecting and reducing agents. In aqueous solution of Au NCs@tryptophan, the addition of furaltadone guaranteed the interaction of furaltadone with tryptophan around Au NCs. The propinquity of furaltadone to Au NCs caused that the fluorescence of Au NCs was weakened by furaltadone based on the inner filter effect (IFE). Under the optimal measurement conditions, the logarithm of relative fluorescence intensity of Au NCs@tryptophan was linearly carried out with the furaltadone amount increasing from 0.5 to 100 μM, the corresponding detection limit was 0.087 μM. The fluorescence change of Au NCs@tryptophan displayed excellent selectivity and sensitivity for furaltadone than other possible substance in the human body. In view of Au NCs@tryptophan, the as-performed fluorescence nanosensor suggested outstanding ability for furaltadone sensing in real samples. Obviously, this nanoprobe of furaltadone could implement the naked-eye visual fluorescence determination of furaltadone.
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Affiliation(s)
- Zhifeng Cai
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, PR China.
| | - Huinan Li
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, PR China
| | - Xin Yang
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, PR China
| | - Ming Zhang
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, PR China
| | - Jinhao Guo
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, PR China
| | - Yani Su
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, PR China
| | - Taotao Liu
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, PR China
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Sushma, Sharma S, Ghosh KS. Applications of Functionalized Carbon-Based Quantum Dots in Fluorescence Sensing of Iron(III). J Fluoresc 2024:10.1007/s10895-024-03611-1. [PMID: 38411860 DOI: 10.1007/s10895-024-03611-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 01/30/2024] [Indexed: 02/28/2024]
Abstract
Iron, an essential trace element exhibits detrimental effects on human health when present at higher or lower concentration than the required. Therefore, there is a pressing demand for sensitive and selective detection of Fe3+ in water, food etc. Unfortunately, in several instances, the traditional approaches suffer from a number of shortcomings like complicated procedures, limited sensitivity, poor selectivity and more expensive and time consuming. The scope of optical tuning and excellent photophysical properties of carbon- based nanomaterials like carbon dots (C-dots) and graphene dots (g-dots) have made them promising optical sensors of metal ions. Moreover, high surface area, superior stability of such materials contributes towards the fruitful development of sensors. The present review offered critical information on the fabrication and fluorimetric applications of these functional nanomaterials for sensitive and selective detection of Fe3+. An in-depth discussion on fluorescent C-dots made from naturally occurring materials and chemical techniques were presented. Effect of doping in C-dots was also highlighted in terms of improved fluorescence response and selectivity. In a similar approach g-dots were also discussed. Many of these sensors exhibited great selectivity, superior sensitivity, high quantum yield, robust chemical and photochemical stability and real-time applicability. Further improvement in these factors can be targeted to develop new sensors.
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Affiliation(s)
- Sushma
- Department of Chemistry, National Institute of Technology Hamirpur, Hamirpur, H.P. 177005, India
| | - Shivani Sharma
- Department of Chemistry, National Institute of Technology Hamirpur, Hamirpur, H.P. 177005, India
| | - Kalyan Sundar Ghosh
- Department of Chemistry, National Institute of Technology Hamirpur, Hamirpur, H.P. 177005, India.
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Han L, Guo Y, Zhang H, Wang Z, Zhang F, Wang Y, Li X, Wang Y, Ye J. Preparation of carbon quantum dot fluorescent probe from waste fruit peel and its use for the detection of dopamine. RSC Adv 2024; 14:1813-1821. [PMID: 38192308 PMCID: PMC10772540 DOI: 10.1039/d3ra06799h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/26/2023] [Indexed: 01/10/2024] Open
Abstract
Carbon quantum dots (CQDs), as a new type of fluorescent nanomaterial, are widely used in the detection of small molecules. Abnormal dopamine secretion can lead to diseases such as Parkinson's disease and schizophrenia. Therefore, it is highly significant to detect dopamine levels in the human body. Using discarded fruit peels to prepare carbon quantum dots can achieve the reuse of kitchen waste, reduce pollution, and create value. Nitrogen-doped carbon quantum dots (N-CQDs) were prepared using the hydrothermal method, with orange peel as the raw material. The fluorescence quantum yield of N-CQDs reached a high value of 35.37% after optimizing the temperature, reaction time, and ethylenediamine dosage. N-CQDs were characterized using various techniques, including ultraviolet visible (UV-vis) spectroscopy, fluorescence spectrophotometer (PL), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). These analyses confirmed the successful doping of nitrogen in the CQDs. The DA concentration ranged from 0 to 300 μmol L-1, and the linear equation for fluorescence quenching of N-CQDs was F/F0 = -0.0056c + 0.98647, with an R2 value of 0.99071. The detection limit was 0.168 μmol L-1. The recovery and precision of dopamine in rabbit serum were 98% to 103% and 2% to 6%, respectively. The prepared N-CQDs could be used as a fluorescent probe to effectively detect DA.
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Affiliation(s)
- Li Han
- School of Biological and Chemical Engineering, Qilu Institute of Technology Jinan 250200 P. R. China
| | - Yingkai Guo
- Jinan Engineering Consulting Institute Jinan China
| | - Haohao Zhang
- School of Biological and Chemical Engineering, Qilu Institute of Technology Jinan 250200 P. R. China
| | - Zifan Wang
- School of Biological and Chemical Engineering, Qilu Institute of Technology Jinan 250200 P. R. China
| | - Fan Zhang
- School of Biological and Chemical Engineering, Qilu Institute of Technology Jinan 250200 P. R. China
| | - Yiran Wang
- School of Biological and Chemical Engineering, Qilu Institute of Technology Jinan 250200 P. R. China
| | - Xingqi Li
- School of Biological and Chemical Engineering, Qilu Institute of Technology Jinan 250200 P. R. China
| | - Ying Wang
- School of Biological and Chemical Engineering, Qilu Institute of Technology Jinan 250200 P. R. China
| | - Jiajia Ye
- School of Biological and Chemical Engineering, Qilu Institute of Technology Jinan 250200 P. R. China
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Zhang M, He H, Huang Y, Huang R, Wu Z, Liu X, Deng H. Machine learning integrated high quantum yield blue light carbon dots for real-time and on-site detection of Cr(VI) in groundwater and drinking water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166822. [PMID: 37683863 DOI: 10.1016/j.scitotenv.2023.166822] [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: 06/12/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/10/2023]
Abstract
The safety of groundwater and drinking water is directly related to the well-being of human beings and ecosystems. On-site monitoring and timely response to heavy metals in these water sources are crucial for water supply security. Fluorescent probes combined with machine learning technology have been applied to on-site detection of heavy metals. However, they were primarily focused on industrial-level detection and lacked the sensitivity required for detecting Cr(VI) in groundwater and drinking water. In this study, we developed an machine learning-integrated approach using high-quantum-yield (QY) N-doped blue-light carbon dots (N-BCDs) for instant detection of Cr(VI) in groundwater and drinking water. N-BCDs were synthesized within 3 min using a household microwave oven with citric acid and 1,2-diaminobenzene, resulting in a QY of approximately 90 %. The fluorescence of N-BCDs was quenched via the internal filter effect (IFE), enabling the detection of Cr(VI) within 1 min, with a detection limit of 0.1574 μg L-1 for Cr(VI) concentrations ranging from 0 to 60 μg L-1. We employed machine learning methods to determine Cr(VI) concentrations from simple shots, based on the red-green-blue (RGB) feature and Kmeans feature extraction. These features were input into four models (Ridge, XGB, SVR, and Linear), achieving a fitness of 95.2 %. Furthermore, the accuracies for Cr(VI) concentration identification in actual groundwater and drinking water were as high as 95.71 % and 96.81 %, respectively. Our work successfully extended the detection range of Cr(VI) to the μg level, significantly improving the practical applicability of the method and providing a new approach for on-site detection of Cr(VI) in groundwater and drinking water.
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Affiliation(s)
- Mengyuan Zhang
- School of Environmental Science and Engineering South China University of Technology, Guangzhou 510006, China
| | - Haijun He
- Guangzhou Marine Geological Survey, Guangzhou 511458, China
| | - Yanquan Huang
- School of Environmental Science and Engineering South China University of Technology, Guangzhou 510006, China
| | - Renfeng Huang
- School of Environmental Science and Engineering South China University of Technology, Guangzhou 510006, China
| | - Zhen Wu
- School of Environmental Science and Engineering South China University of Technology, Guangzhou 510006, China
| | - Xueming Liu
- School of Environmental Science and Engineering South China University of Technology, Guangzhou 510006, China.
| | - Hong Deng
- School of Environmental Science and Engineering South China University of Technology, Guangzhou 510006, China.
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He M, Xiao Y, Wei Y, Zheng B. Semiquantitative and visual detection of ferric ions in real samples using a fluorescent paper-based analytical device constructed with green emitting carbon dots. RSC Adv 2023; 13:31720-31727. [PMID: 37908650 PMCID: PMC10613948 DOI: 10.1039/d3ra05320b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 10/20/2023] [Indexed: 11/02/2023] Open
Abstract
A simple and portable paper-based analytical device was developed for visual and semiquantitative detection of ferric ion in real samples using green emitting carbon dots (CDs), which were prepared via microwave method using sodium citrate, urea and sodium hydroxide as raw materials and then loaded on the surface of paper substrate. When Fe3+ exists, the green fluorescence of CDs was quenched and significant color change from green to dark blue were observed, resulting the visual detection of Fe3+ with a minimum distinguishable concentration of 100 μM. By analyzing the intensity changes of green channels of test paper with the help of smartphone, the semiquantitative detection was realized within the range of 100 μM to 1200 μM. The proposed paper-based analytical devices have great application prospects in on site detection of Fe3+ in real samples.
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Affiliation(s)
- Mengyuan He
- College of Chemistry and Chemical Engineering, Xinyang Normal University Xinyang 464000 China
| | - Yu Xiao
- College of Chemistry and Chemical Engineering, Xinyang Normal University Xinyang 464000 China
| | - Yuanhang Wei
- College of Chemistry and Chemical Engineering, Xinyang Normal University Xinyang 464000 China
| | - Bo Zheng
- College of Chemistry and Chemical Engineering, Xinyang Normal University Xinyang 464000 China
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Guo Z, Zheng HY, Huang ZY, Liu YZ, Liu YH, Chen Y, Gao J, Hu Y, Huang C. Solvothermal synthesis of bifunctional carbon dots for tartrazine and Fe(III) detection from chamomile residue by ternary DES pretreatment. Food Chem 2023; 426:136604. [PMID: 37348402 DOI: 10.1016/j.foodchem.2023.136604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/28/2023] [Accepted: 06/09/2023] [Indexed: 06/24/2023]
Abstract
A ternary deep eutectic solvent (DES) consisting of choline chloride, lactic acid, and urea in a molar ratio of 1:2:2 was used to pretreat chamomile residue, followed by carbon dots (CDs) preparation using a one-pot solvothermal method. The CDs prepared under the suitable conditions had a high quantum yield of 47.34% and could be used as a bifunctional fluorescent probe for the detection of tartrazine and Fe(III). The concentration of tartrazine or Fe(III) had a good linear relationship with the fluorescence intensity of CDs that the determination coefficient (R2) was 0.9957 and 0.9943, and the limit of detection (LOD) was 40 nM and 119 nM, respectively. After verifying the different fluorescence quenching mechanisms of CDs by these two substances, a quantitative analysis was performed on real samples with recoveries of 90.70%∼104.29%. Overall, this study provided a promising technology for chemical conversion from low-cost chamomile residue to attractive bifunctional fluorescent probe.
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Affiliation(s)
- Zheng Guo
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China
| | - Han-Yi Zheng
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China
| | - Zhong-Ying Huang
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China
| | - Yue-Zhen Liu
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China
| | - Yao-Hua Liu
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China
| | - Yun Chen
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan 528437, People's Republic of China
| | - Jing Gao
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan 528437, People's Republic of China
| | - Yong Hu
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan 528437, People's Republic of China.
| | - Chao Huang
- School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan 528437, People's Republic of China.
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