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Wang E, Ma H, Lu J, Wang F, Ren J. Recent progress in the fluorescent probes for hydrazine detection. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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2
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Wang Z, Zhu Y, Wu Y, Ding W, Li X. Tunable fluorescent amino-functionalized Ti 3C 2T x MXene quantum dots for ultrasensitive Fe 3+ ion sensing. NANOSCALE 2022; 14:9498-9506. [PMID: 35748806 DOI: 10.1039/d2nr02088b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The development of sensors with high sensitivity, good selectivity and reproducibility are of great importance for the detection of Fe3+ in contaminated water for environmental monitoring. In this work, a reflux approach has been adopted to synthesize Ti3C2Tx quantum dots (QDs) based on the cutting effect of tetramethylammonium hydroxide (TMAOH) on Ti3C2Tx at high temperature. The surface-functionalized Ti3C2Tx QDs contained abundant amino groups and exhibited tunable pH-dependent emission, which was attributed to the protonation and deprotonation of the surface terminations. The linearity of the radiometric fluorescence intensity versus pH indicates its great potential as a dual-emission ratiometric pH sensor. Additionally, the Ti3C2Tx QDs exhibited tunable excitation-dependent emission behavior, which was related to the degree of passivation by the amino groups on the surface. Furthermore, the fluorescence intensity of the Ti3C2Tx QDs shows a linear response toward Fe3+ in the nanomolar to micromolar range with a low detection limit of 2 nM, originating from the oxidation and reduction between Fe3+ and Ti3C2Tx. This ultra-sensitive and selective detection capability demonstrated the environmental application potential for Ti3C2Tx QDs as a nanoprobe to monitor Fe3+.
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Affiliation(s)
- Zhiwei Wang
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China.
- Key Laboratory of Optoelectronic Devices and Systems, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Yuanhang Zhu
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China.
| | - Yuchen Wu
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China.
- Key Laboratory of Optoelectronic Devices and Systems, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Weiyuan Ding
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China.
- Key Laboratory of Optoelectronic Devices and Systems, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Xiuting Li
- Institute for Advanced Study, Shenzhen University, Shenzhen, 518060, China.
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Gogoi J, Shishodia S, Chowdhury D. Tunable electrical properties of carbon dot doped photo-responsive azobenzene-clay nanocomposites. RSC Adv 2020; 10:37545-37554. [PMID: 35521280 PMCID: PMC9057113 DOI: 10.1039/d0ra07386e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 09/28/2020] [Indexed: 12/15/2022] Open
Abstract
The development of photo-responsive nanocomposite materials is important in the fabrication of optoelectronic devices. In this work, we fabricated a carbon dot doped azobenzene–clay nanocomposite which possesses different ac conductivity with and without UV treatment. At first, azobenzene nanoclusters were synthesised and then successfully used to make an azobenzene–clay nanocomposite. It was observed that there is a small change in the ac conductivity of the azobenzene–clay nanocomposite with and without UV treatment. However, this change in ac photoconductivity can be enhanced in the azobenzene–clay nanocomposite by doping with electron-rich cysteine and methionine carbon dots. Hence, ac conductivity properties of the carbon-doped azobenzene–clay nanocomposite can be tuned using UV light. Impedance measurements were determined using Electrochemical Impedance Spectroscopy. Mechanistic insight into the phenomenon is also discussed in the paper. Thus fabrication of tunable carbon dot doped photo-responsive azobenzene–clay nanocomposites will lead to the use of carbon dot doped azobenzene–clay nanocomposites in photo-switchable optoelectronic devices. We demonstrate successful fabrication of an azobenzene–clay nanocomposite doped with electron-rich cysteine and methionine carbon dots with photo-switchable ac conductivity.![]()
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Affiliation(s)
- Jahnabi Gogoi
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India +91 361 2279909 +91 361 2912073
| | - Shubham Shishodia
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India +91 361 2279909 +91 361 2912073
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory, Physical Sciences Division, Institute of Advanced Study in Science and Technology Paschim Boragaon, Garchuk Guwahati 781035 India +91 361 2279909 +91 361 2912073
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Li R, Hou X, Yuan M, Long Y, Chen S. Carbon Dots Synthesized and its Applications in the Detection of Chlortetracycline and Water Based on the Aggregation‐Induced Emission. ChemistrySelect 2020. [DOI: 10.1002/slct.201904094] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Rong Li
- Department of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan PR China
| | - Xinyan Hou
- Department of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan PR China
| | - Min Yuan
- Department of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan PR China
| | - Yunfei Long
- Department of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan PR China
| | - Shu Chen
- Department of Chemistry and Chemical Engineering Hunan University of Science and Technology Xiangtan PR China
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Yang P, Zhu Z, Zhang T, Zhang W, Chen W, Cao Y, Chen M, Zhou X. Orange-Emissive Carbon Quantum Dots: Toward Application in Wound pH Monitoring Based on Colorimetric and Fluorescent Changing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1902823. [PMID: 31518068 DOI: 10.1002/smll.201902823] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/29/2019] [Indexed: 05/18/2023]
Abstract
Monitoring of wound pH is critical for interpreting wound status, because early identification of wound infection or nonhealing wounds is conducive to administion of therapies at the right time. Here, novel orange-emissive carbon quantum dots (O-CDs) are synthesized via microwave-assisted heating of 1,2,4-triaminobenzene and urea aqueous solution. The as-prepared O-CDs exhibit distinctive colorimetric response to pH changing, and also display pH-sensitive fluorescence. Benefiting from the response of O-CDs over a wound-relevant pH range (5-9), medical cotton cloth is selected to immobilize O-CDs through hydrogen bond interactions, the resultant O-CDs-coated cloth with emission at 560 nm shows a high response to pH variation in the range of 5-9 via both fluorescence and visible colorimetric changes. Moreover, the sensitivity of fluorescence to pH is capable of establishing an analytical mode for determining pH value. Further, the O-CDs-based pH indicator possesses not only superior biocompatibility and drug compatibility but also excellent resistance leachability and high reversibility. Importantly, the usage of O-CDs-coated cloth to detect pH is free from the interference of blood contamination and long-term storage, thus providing a valuable strategy for wound pH monitoring through visual response and quantitative determination.
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Affiliation(s)
- Pei Yang
- College of Materials Science and Engineering, Fast-Growing Tree and Agro-Fibre Materials Engineering Center, Nanjing Forestry University, Nanjing, 210037, Jiangsu, P. R. China
| | - Ziqi Zhu
- College of Materials Science and Engineering, Fast-Growing Tree and Agro-Fibre Materials Engineering Center, Nanjing Forestry University, Nanjing, 210037, Jiangsu, P. R. China
| | - Tao Zhang
- College of Materials Science and Engineering, Fast-Growing Tree and Agro-Fibre Materials Engineering Center, Nanjing Forestry University, Nanjing, 210037, Jiangsu, P. R. China
| | - Wei Zhang
- College of Materials Science and Engineering, Fast-Growing Tree and Agro-Fibre Materials Engineering Center, Nanjing Forestry University, Nanjing, 210037, Jiangsu, P. R. China
| | - Weimin Chen
- College of Materials Science and Engineering, Fast-Growing Tree and Agro-Fibre Materials Engineering Center, Nanjing Forestry University, Nanjing, 210037, Jiangsu, P. R. China
| | - Yizhong Cao
- College of Materials Science and Engineering, Fast-Growing Tree and Agro-Fibre Materials Engineering Center, Nanjing Forestry University, Nanjing, 210037, Jiangsu, P. R. China
| | - Minzhi Chen
- College of Materials Science and Engineering, Fast-Growing Tree and Agro-Fibre Materials Engineering Center, Nanjing Forestry University, Nanjing, 210037, Jiangsu, P. R. China
| | - Xiaoyan Zhou
- College of Materials Science and Engineering, Fast-Growing Tree and Agro-Fibre Materials Engineering Center, Nanjing Forestry University, Nanjing, 210037, Jiangsu, P. R. China
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Wang H, Yang L, Chu S, Liu B, Zhang Q, Zou L, Yu S, Jiang C. Semiquantitative Visual Detection of Lead Ions with a Smartphone via a Colorimetric Paper-Based Analytical Device. Anal Chem 2019; 91:9292-9299. [DOI: 10.1021/acs.analchem.9b02297] [Citation(s) in RCA: 216] [Impact Index Per Article: 43.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Haiqian Wang
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, People’s Republic of China
| | - Liang Yang
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, People’s Republic of China
- State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, People’s Republic of China
| | - Suyun Chu
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, People’s Republic of China
- State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, People’s Republic of China
| | - Bianhua Liu
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, People’s Republic of China
- State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, People’s Republic of China
| | - Qikai Zhang
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, People’s Republic of China
| | - Lanmei Zou
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, People’s Republic of China
| | - Shaoming Yu
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009, People’s Republic of China
| | - Changlong Jiang
- Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031, People’s Republic of China
- State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Hefei, Anhui 230031, People’s Republic of China
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Li B, Ma H, Zhang B, Qian J, Cao T, Feng H, Li W, Dong Y, Qin W. Dually emitting carbon dots as fluorescent probes for ratiometric fluorescent sensing of pH values, mercury(II), chloride and Cr(VI) via different mechanisms. Mikrochim Acta 2019; 186:341. [PMID: 31076885 DOI: 10.1007/s00604-019-3437-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 04/11/2019] [Indexed: 01/20/2023]
Abstract
The authors describe the preparation of carbon dots (CDs) that display both blue (~ 410 nm) and yellow (~ 565 nm) emission peaks. The CDs was synthesized by solvothermal treatment of o-phenylenediamine in aqueous ethyl alcohol at pH ~7.0. The CDs are shown to be useful fluorescent probes for pH values in that the ratio of fluorescences at 565 and 410 nm strongly depends on the pH value in the range from 4.5-6.5 and 10.0-13.0, respectively. The blue fluorescence is quenched by 91% by 100 µM solutions of Hg(II) through an electron transfer process, and is restored by 97% an addition of chloride (0.5 mM). The yellow fluorescence, in contrast, is hardly affected. The ratio of fluorescences at 414 and 565 nm drops linearly in the 30 to 60 μM of Hg(II) concentration range, and the limit of detection is 60 nM. Fluorescence is linearly restored in the 70 to 180 μM chloride concentration range, and the LOD is 2.8 nM. Both the blue and the yellow emission are reduced by Cr(VI) (chromate) due to an inner filter effect at pH 3.0. The ratio of fluorescences (410/565 nm) drops linearly in the 20 to 250 μM Cr(VI) concentration range, and the LOD is 260 nM. The method was utilized to analysis of chloride in salt lake brine and of Cr(VI) in spiked tap water. Graphical abstract Schematic presentation of carbon dots with pH-dependent dual emission (at ~ 410 nm and ~ 565 nm). They are shown to be viable fluorescent probes for ratiometric sensing of pH values, mercury(II), chloride and Cr(VI) via different mechanisms.
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Affiliation(s)
- Bo Li
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Xining, 810008, People's Republic of China.,Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt, Lake Resources, Xining, 810008, People's Republic of China
| | - Hong Ma
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Bo Zhang
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Xining, 810008, People's Republic of China.,Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt, Lake Resources, Xining, 810008, People's Republic of China
| | - Jing Qian
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Ting Cao
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou, 730000, People's Republic of China
| | - Haitao Feng
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Xining, 810008, People's Republic of China.,Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt, Lake Resources, Xining, 810008, People's Republic of China
| | - Wu Li
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Xining, 810008, People's Republic of China.,Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining, 810008, People's Republic of China
| | - Yaping Dong
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Qinghai Institute of Salt Lakes, Xining, 810008, People's Republic of China. .,Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt, Lake Resources, Xining, 810008, People's Republic of China.
| | - Wenwu Qin
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou, 730000, People's Republic of China.
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8
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Zhou Y, Liu Y, Li Y, He Z, Xu Q, Chen Y, Street J, Guo H, Nelles M. Multicolor carbon nanodots from food waste and their heavy metal ion detection application. RSC Adv 2018; 8:23657-23662. [PMID: 35540293 PMCID: PMC9081756 DOI: 10.1039/c8ra03272f] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 06/23/2018] [Indexed: 11/21/2022] Open
Abstract
Multicolor carbon dots (C-dots) have excellent performance characteristics, high photoluminescence efficiency, ease of fabrication and low toxicity. C-dots have been used in a wide variety of fields including bioimaging, biomedicine, photocatalysis and environmental monitoring. The mass production of multicolor CDs using low-cost, facile methods is an important issue for future industrial applications. In this article, we reported a simple and highly effective way to prepare the multicolor C-dots and use them to detect heavy metal iron ions. Hydrochar acquired from food waste processed with hydrothermal carbonization (HTC) was used as the carbonaceous material for this process. Four colors of C-dots were obtained and included blue, green, yellow and red. These multicolor C-dots could be used as fluorescence probes with unique selectivity to detect the Fe3+ ion. The luminescence response ranged from 1 to 50 μM with a correlation coefficient of 0.9968. This discovery not only shows the high value-added products which can be obtained from food waste but can also lead to new developments in carbonaceous materials which can be used as “green resources”. Multicolor carbon dots produced from green carbonaceous materials by disposing of food waste through the HTC process could be used as fluorescent probes to detect iron ions.![]()
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Affiliation(s)
- Ying Zhou
- Faculty of Agricultural and Environmental Sciences
- Department Waste Management
- University of Rostock
- 18059 Rostock
- Germany
| | - Yao Liu
- Research Institute for New Materials Technology
- Chongqing University of Arts and Sciences
- Chongqing 402160
- China
| | - Yeqing Li
- State Key Laboratory of Heavy Oil Processing
- Beijing Key Laboratory of Biogas Upgrading Utilization
- China University of Petroleum-Beijing
- China
| | - Ziying He
- State Key Laboratory of Heavy Oil Processing
- Beijing Key Laboratory of Biogas Upgrading Utilization
- China University of Petroleum-Beijing
- China
| | - Quan Xu
- State Key Laboratory of Heavy Oil Processing
- Beijing Key Laboratory of Biogas Upgrading Utilization
- China University of Petroleum-Beijing
- China
| | | | - Jason Street
- Department of Sustainable Bioproducts
- Mississippi State University
- USA
| | - Hao Guo
- Chongqing Institute of Forensic Science
- Chongqing 400021
- China
| | - Michael Nelles
- Faculty of Agricultural and Environmental Sciences
- Department Waste Management
- University of Rostock
- 18059 Rostock
- Germany
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Deka MJ, Chowdhury D. Chiral carbon dots and their effect on the optical properties of photosensitizers. RSC Adv 2017. [DOI: 10.1039/c7ra10611d] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
In this work, we have successfully prepared intrinsically chiral carbon dots from chiral precursors. We have also demonstrated that the chirality of these carbon dots can affect the optical properties of photosensitizer molecules like azobenzene.
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Affiliation(s)
- Manash Jyoti Deka
- Material Nanochemistry Laboratory
- Physical Sciences Division
- Institute of Advanced Study in Science and Technology
- Guwahati-781035
- India
| | - Devasish Chowdhury
- Material Nanochemistry Laboratory
- Physical Sciences Division
- Institute of Advanced Study in Science and Technology
- Guwahati-781035
- India
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