1
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Chen ZJ, Huang AJ, Luo L, Xu ZL, Wang H. Simple dual-readout immunosensor based on phosphate-triggered and potassium permanganate for visual detection of fenitrothion. Biosens Bioelectron 2024; 246:115872. [PMID: 38039731 DOI: 10.1016/j.bios.2023.115872] [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: 10/23/2023] [Revised: 11/19/2023] [Accepted: 11/21/2023] [Indexed: 12/03/2023]
Abstract
Multicolor-based visual immunosensor is a promising tool for rapid analysis without the use of bulky instruments. Herein, an anti-fenitrothion nanobody-alkaline phosphatase fusion protein (VHHjd8-ALP) was employed to develop a multicolor visual immunosensor (MVIS) and a ratiometric fluorescence MVIS (RFMVIS, respectively). After one-step competitive immunoassay, the VHHjd8-ALP bound to microplate catalyzed phenyl phosphate disodium salt (ArP) into phenol. Under high alkaline condition (pH 12), the phenol reduced KMnO4 to intermediate (K2MnO4) and further to MnO2 in alkaline condition (pH 12), accompanied by a visible color transition of purple-green-yellow, which can be used for semiquantitative visual analysis or qualitative detection by measuring RGB value. RFMVIS was proposed on the basis of MVIS to further improve sensitivity. The CdTe quantum dot and fluorescein were used as signal probes to develop the fluorescent immunosensor. The CdTe dots with red emission (644 nm) was quenched by oxidation of KMnO4, whereas the fluorescein with green emission (520 nm) remained constant, accompanied by a fluorescent color transition of green-yellow-red. By measuring the ratio of the fluorescence intensity (I644/I520), the ratiometric fluorescence immunosensor was developed for qualitative analysis. The two visual immunosensors were sensitive and simple, and they showed good accuracy and practicability in the recovery test, thus are ideal tools for rapid screening.
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Affiliation(s)
- Zi-Jian Chen
- School of Food & Pharmaceutical Engineering, Zhaoqing University, Zhaoqing, 526061, People's Republic of China; Laboratory of Quality & Safety Risk Assessment for Agro-products (Zhaoqing), Ministry of Agriculture and Rural Affairs, Zhaoqing, 526061, People's Republic of China; Guangdong Engineering Technology Research Center of Food & Agricultural Product Safety Analysis and Testing, Zhaoqing, 526061, People's Republic of China
| | - Ai-Jun Huang
- School of Food & Pharmaceutical Engineering, Zhaoqing University, Zhaoqing, 526061, People's Republic of China; Laboratory of Quality & Safety Risk Assessment for Agro-products (Zhaoqing), Ministry of Agriculture and Rural Affairs, Zhaoqing, 526061, People's Republic of China; Guangdong Engineering Technology Research Center of Food & Agricultural Product Safety Analysis and Testing, Zhaoqing, 526061, People's Republic of China
| | - Lin Luo
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
| | - Hongwu Wang
- School of Food & Pharmaceutical Engineering, Zhaoqing University, Zhaoqing, 526061, People's Republic of China; Laboratory of Quality & Safety Risk Assessment for Agro-products (Zhaoqing), Ministry of Agriculture and Rural Affairs, Zhaoqing, 526061, People's Republic of China; Guangdong Engineering Technology Research Center of Food & Agricultural Product Safety Analysis and Testing, Zhaoqing, 526061, People's Republic of China.
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2
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Shen J, Fan Z. Ce 4+/Ce 3+ as the switch of AIE-copper nanoclusters for highly selective detection of ascorbic acid in soft drinks. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 302:123070. [PMID: 37390716 DOI: 10.1016/j.saa.2023.123070] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 06/04/2023] [Accepted: 06/21/2023] [Indexed: 07/02/2023]
Abstract
An ultrasimple "turn-on" sensor for indirectly detecting ascorbic acid (AA) was prepared using N-acetyl-L-cysteine stabilized copper nanoclusters (NAC-CuNCs) via the AIE (aggregation-induced emission) effect controlled by Ce4+/Ce3+ redox reaction. This sensor fully utilizes the different properties of Ce4+ and Ce3+. Non-emissive NAC-CuNCs were synthesized by a facile reduction method. NAC-CuNCs easily aggregate in the presence of Ce3+ due to AIE, resulting in fluorescence enhancement. However, this phenomenon cannot be observed in the presence of Ce4+. Ce4+ possesses strong oxidizing ability and produces Ce3+ by reacting with AA via a redox reaction, followed by switching on the luminescence of NAC-CuNCs. Moreover, the fluorescence intensity (FI) of NAC-CuNCs increases with the concentration of AA in the range of 4-60 µM, with the limit of detection (LOD) as low as 0.26 µM. This probe with excellent sensitivity and selectivity was successfully used in the determination of AA in soft drinks.
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Affiliation(s)
- Jingxiang Shen
- School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030000, People's Republic of China; Department of Chemistry, Changzhi University, Changzhi 046011, People's Republic of China
| | - Zhefeng Fan
- School of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030000, People's Republic of China.
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3
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Naqvi SS, Anwar H, Siddiqui A, Shah MR. Sensitive and highly selective colorimetric biosensing of vitamin-C and vitamin-B1 by flavoring agent-based silver nanoparticles. J Biol Inorg Chem 2022; 27:471-483. [PMID: 35821138 DOI: 10.1007/s00775-022-01944-5] [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: 01/30/2022] [Accepted: 06/07/2022] [Indexed: 11/25/2022]
Abstract
A sensitive scheme was established for the detection of vitamin C (Ascorbic acid) and vitamin B1 (Thiamin HCl) using Maltol capped AgNPs (McAgNPs) as colorimetric sensor. The designed scheme showed an instant alteration in color from yellow to orange and green for vitamin-C and vitamin B1 sequentially. The probe was sensitive in a concentration range of (0-1 µM) with limit of detection 0.064 and 0.038 µM for vitamin C and vitamin B1 sequentially. The interaction mechanism between vitamin C and vitamin B1 and McAgNPs was evaluated by visible spectroscopy, FTIR, and AFM. Vitamin C attaches on the surface of nanoparticles by C=O group, while OH, C-S-C, and NH2 groups are involved in the binding of vitamin B1 with McAgNPs. The Vit-C/Vit-B1-McAgNPs complexes were stable over a wide range of pHs. The size of McAgNPs increased after the interaction of vitamin C/vitamin B1 from 30-40 nm to 500 and 400 nm sequentially. The scheme was successfully applied for the detection of vitamin C and vitamin B1 in urine, plasma, water, and commercial pharmaceutical tablets with good recoveries. The scheme was ascertained to be more sensitive than many other formerly described schemes.
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Affiliation(s)
- Syeda Sumra Naqvi
- Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Gulshan-E-Iqbal Campus, Karachi, 75300, Pakistan.
| | - Humera Anwar
- Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Gulshan-E-Iqbal Campus, Karachi, 75300, Pakistan
| | - Asma Siddiqui
- Department of Chemistry, Federal Urdu University of Arts, Science and Technology, Gulshan-E-Iqbal Campus, Karachi, 75300, Pakistan
| | - Muhammad Raza Shah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi, 75270, Pakistan
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4
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Zhu Q, Du J, Li J, Wang J, Yang R, Li Z, Qu L. Methyl viologen induced fluorescence quenching of CdTe quantum dots for highly sensitive and selective "off-on" sensing of ascorbic acid through redox reaction. J Fluoresc 2022; 32:1405-1412. [PMID: 35438370 DOI: 10.1007/s10895-022-02925-2] [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: 10/18/2021] [Accepted: 03/01/2022] [Indexed: 11/30/2022]
Abstract
A turn-on fluorescent sensor based on CdTe quantum dots (QDs) is designed for highly sensitive and selective ascorbic acid (AA) detection. CdTe shows a strong emission centered at 578 nm. When assembled with poly(sodium 4-styrenesulfonate) (PSS) and methyl viologen (Mv2+) through electrostatic interaction, the emission is found to be effectively quenched. In the presence of AA, Mv2+ is reduced to Mv+, making the fluorescence of CdTe QDs restored. Under the optimal conditions, the proposed AA sensing method shows a linear proportional response from 0.8 µM to 20 µM, with the detecting limit as low as 50 nM. The developed method was successfully applied in the analysis of AA in human serum samples and cell lysates with satisfactory results.
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Affiliation(s)
- Qianqian Zhu
- College of Chemistry, Green catalysis center, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, 450001, Zhengzhou, China
| | - Jingjing Du
- College of Chemistry, Green catalysis center, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, 450001, Zhengzhou, China
| | - Jianjun Li
- College of Chemistry, Green catalysis center, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, 450001, Zhengzhou, China
| | - Jizhong Wang
- Key Laboratory of Southern Farmland Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Hunan division of GRG Metrology and Test, 410000, Changsha, China
| | - Ran Yang
- College of Chemistry, Green catalysis center, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, 450001, Zhengzhou, China.
| | - Zhaohui Li
- College of Chemistry, Green catalysis center, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, 450001, Zhengzhou, China
| | - Lingbo Qu
- College of Chemistry, Green catalysis center, Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications, Zhengzhou Key Laboratory of Functional Nanomaterial and Medical Theranostic, Zhengzhou University, 450001, Zhengzhou, China.,Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan, Education Ministry of P.R. China, Henan, China
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5
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Goryacheva OA, Wegner KD, Sobolev AM, Häusler I, Gaponik N, Goryacheva IY, Resch-Genger U. Influence of particle architecture on the photoluminescence properties of silica-coated CdSe core/shell quantum dots. Anal Bioanal Chem 2022; 414:4427-4439. [PMID: 35303136 DOI: 10.1007/s00216-022-04005-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 12/25/2022]
Abstract
Light-emitting nanoparticles like semiconductor nanocrystals (termed quantum dots, QDs) are promising candidates for biosensing and bioimaging applications based on their bright and stable photoluminescent properties. As high-quality QDs are often synthesized in organic solvents, strategies needed to be developed to render them water-dispersible without affecting their optical properties and prevent changes in postmodification steps like the biofunctionalization with antibodies or DNA. Despite a large number of studies on suitable surface modification procedures, the preparation of water-soluble QDs for nanobiotechnology applications still presents a challenge. To highlight the advantages of surface silanization, we systematically explored the influence of the core/multishell architecture of CdSe/CdS/ZnS QDs and the silanization conditions on the optical properties of the resulting silanized QDs. Our results show that the optical properties of silica-coated CdSe/CdS/ZnS QDs are best preserved in the presence of a thick CdS (6 monolayers (ML)) intermediate shell, providing a high photoluminescence quantum yield (PL QY), and a relatively thick ZnS (4.5 ML) external shell, effectively shielding the QDs from the chemical changes during silica coating. In addition to the QD core/shell architecture, other critical parameters of the silica-coating process, that can have an influence on the optical properties of the QD, include the choice of the surfactant and its concentration used for silica coating. The highest PL QY of about 46% was obtained by a microemulsion silica-coating procedure with the surfactant Brij L4, making these water-dispersible QDs to well-suited optical reporters in future applications like fluorescence immunoassays, biomedicine, and bioimaging.
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Affiliation(s)
- Olga A Goryacheva
- Department of General and Inorganic Chemistry, Chemistry Institute, Saratov State University, Astrakhanskaya 83, 410012, Saratov, Russia. .,Physical Chemistry, Technische Universität Dresden, Zellescher Weg 19, 01062, Dresden, Germany.
| | - K David Wegner
- Division Biophotonics, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany
| | - Aleksandr M Sobolev
- Department of General and Inorganic Chemistry, Chemistry Institute, Saratov State University, Astrakhanskaya 83, 410012, Saratov, Russia.,Division Biophotonics, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany
| | - Ines Häusler
- AG Strukturforschung/Elektronenmikroskopie, Institut Für Physik, Humboldt-Universität Zu Berlin, Newtonstraße 15, 12489, Berlin, Germany
| | - Nikolai Gaponik
- Physical Chemistry, Technische Universität Dresden, Zellescher Weg 19, 01062, Dresden, Germany
| | - Irina Y Goryacheva
- Department of General and Inorganic Chemistry, Chemistry Institute, Saratov State University, Astrakhanskaya 83, 410012, Saratov, Russia
| | - Ute Resch-Genger
- Division Biophotonics, Federal Institute for Materials Research and Testing (BAM), Richard-Willstätter-Straße 11, 12489, Berlin, Germany.
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6
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Shenashen MA, Emran MY, El Sabagh A, Selim MM, Elmarakbi A, El-Safty SA. Progress in sensory devices of pesticides, pathogens, coronavirus, and chemical additives and hazards in food assessment: Food safety concerns. PROGRESS IN MATERIALS SCIENCE 2022; 124:100866. [DOI: 10.1016/j.pmatsci.2021.100866] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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7
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Ma F, Luo J, Li X, Liu S, Yang M, Chen X. A "switch-on" fluorescence assay based on silicon quantum dots for determination of ascorbic acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 249:119343. [PMID: 33359942 DOI: 10.1016/j.saa.2020.119343] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/09/2020] [Accepted: 12/10/2020] [Indexed: 06/12/2023]
Abstract
Water dispersible silicon quantum dots (SiQDs) showing blue fluorescence were synthesized with 3-aminopropyltriethoxysilane (APTES) as silicon source. Based on the synthesized SiQDs as the photoluminescence unit, MnO2 nanosheets (NS) as the quencher, a "switch-on" fluorescence assay for the determination of ascorbic acid (AA) was designed. The fluorescence of SiQDs can be effectively quenched by MnO2 NS because of the internal filtration effect. In the presence of AA, MnO2 is reduced to Mn2+, so that the fluorescence of SiQDs is partially recovered. The recovered fluorescence intensity was related to the concentration of AA. Under the optimal experimental conditions, the linear response range of the assay to AA is 1-80 µM, and the detection limit is 0.48 µM. The method for the determination of AA has the advantages of simple, low cost, good selectivity and sensitivity. The assay has been successfully applied to the quantification of AA in beverage (mizone) samples, which proves the practicability of the assay.
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Affiliation(s)
- Fanghui Ma
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, China
| | - Junjun Luo
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, China
| | - Xiaoqing Li
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, China
| | - Shuping Liu
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, China
| | - Minghui Yang
- College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, China.
| | - Xiang Chen
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha 410008, China.
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8
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Ruangchaithaweesuk S, Srirattanasakunsuk P, Poomuang C, Kanokworrakarn A, Tuntulani T. Poly(methacrylic acid)‐Stabilized Silver Nanoclusters as Colorimetric Sensors for the Rapid and Sensitive Detection of Ascorbic Acid. ChemistrySelect 2021. [DOI: 10.1002/slct.202004547] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Songtham Ruangchaithaweesuk
- Department of Chemistry Faculty of Liberal Arts and Science Kasetsart University Kamphaeng Saen Campus Nakhon Pathom 73140 Thailand
| | - Pattraporn Srirattanasakunsuk
- Department of Chemistry Faculty of Liberal Arts and Science Kasetsart University Kamphaeng Saen Campus Nakhon Pathom 73140 Thailand
| | - Chutima Poomuang
- Department of Chemistry Faculty of Liberal Arts and Science Kasetsart University Kamphaeng Saen Campus Nakhon Pathom 73140 Thailand
| | - Amornrat Kanokworrakarn
- Department of Chemistry Faculty of Liberal Arts and Science Kasetsart University Kamphaeng Saen Campus Nakhon Pathom 73140 Thailand
| | - Thawatchai Tuntulani
- Department of Chemistry Faculty of Science Chulalongkorn University Bangkok 10330 Thailand
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9
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Tang Q, Fan YZ, Han L, Yang YZ, Li NB, Luo HQ. Redox induced dual-signal optical sensor of carbon dots/MnO 2 nanosheets based on fluorescence and second-order scattering for the detection of ascorbic acid. Mikrochim Acta 2020; 187:475. [PMID: 32737591 DOI: 10.1007/s00604-020-04459-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 07/16/2020] [Indexed: 01/04/2023]
Abstract
In order to detect ascorbic acid (AA) sensitively, a dual-signal optical sensor of a nanosystem with carbon dots (CDs)/MnO2 nanosheets based on fluorescence and second-order scattering (SOS) has been constructed. Here, MnO2 nanosheets, both as a fluorescence quencher and signal transducer of SOS, quench the blue fluorescence of CDs by an inner filter effect. Under the excitation of 300 nm, the nanosystem shows a fluorescence emission peak at 405 nm and a SOS peak at 610 nm, respectively. With the increase of AA , the lamellar structure of MnO2 nanosheets is etched into a smaller nanostructure, causing a decrease of the fluorescence recovery of CDs (405 nm) and decrease of the SOS signal of the MnO2 nanosheets (610 nm). According to the simultaneous changes of fluorescence and SOS signals, a dual-signal optical sensor toward AA is successfully constructed. Satisfactorily, the optical sensor for AA detection shows a detection limit of 88 and 105 nM for fluorescence and SOS, respectively. The practical application of the designed sensor is verified through the detection of AA content in vitamin C tablets, and satisfactory results are obtained Graphical Abstract A dual-signal sensor of fluorescence (FL) and second-order scattering (SOS) based on the carbon dot (CD) and MnO2 nanosheet system for ascorbic acid (AA) detection is constructed, in which CDs are used for the FL mode and MnO2 nanosheets are used for the SOS mode.
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Affiliation(s)
- Qian Tang
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
| | - Yu Zhu Fan
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
| | - Lei Han
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
| | - Yu Zhu Yang
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China
| | - Nian Bing Li
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China.
| | - Hong Qun Luo
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, People's Republic of China.
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10
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Li Y, Hao N, Luo S, Liu Q, Sun L, Qian J, Cai J, Wang K. Simultaneous detection of TNOS and P35S in transgenic soybean based on magnetic bicolor fluorescent probes. Talanta 2020; 212:120764. [PMID: 32113537 DOI: 10.1016/j.talanta.2020.120764] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 01/14/2020] [Accepted: 01/19/2020] [Indexed: 12/25/2022]
Abstract
A magnetic-separation-dual-targets fluorescent biosensor was fabricated to detect terminator nopaline synthase (TNOS) and promoter of cauliflower mosaic virus 35s (P35S) in transgenic soybean based on incorporation of bicolor CdTe quantum dots carried by silica nanospheres. In this protocol, the fixed probes for TNOS or P35S were magnetized firstly with Fe3O4@Au magnetic nanosphere by Au-S covalent bonding to achieve magnetized probes. Meanwhile, the capture probes for TNOS or P35S were functionalized with green or red fluorescent microspheres respectively to obtain fluorescently-labeled probes, which could emit relative strong green or red fluorescent signal. Two terminals of TNOS or P35S were recognized by magnetized probes and fluorescently-labeled probes respectively to form the sandwiched structures in the process of biosensor development subsequently, and it was separated by a magnet instantly. The fluorescence intensities of remnant supernatant were measured and analyzed accordingly to achieve simultaneous detection of TNOS and P35S. This biosensor exhibited a good dynamic range, low limit of detection and excellent selectivity in detecting transgenic soybean.
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Affiliation(s)
- Yaqi Li
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, 212003, China
| | - Nan Hao
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Shilong Luo
- Sinograin Zhenjiang Grains & Oils Quality Testing Center, Zhenjiang, 212006, China
| | - Qian Liu
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Li Sun
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Jing Qian
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Jianrong Cai
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Kun Wang
- Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China; Key Laboratory of Sensor Analysis of Tumor Marker, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
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11
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Wang J, Liu X, Huang L, Jin J, Jiang C, Li D, Wen H, Hu J. Controllable and robust dual-emissive quantum dot nanohybrids as inner filter-based ratiometric probes for visualizable melamine detection. NANOSCALE 2020; 12:4562-4572. [PMID: 32043096 DOI: 10.1039/c9nr08849k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The ratiometric fluorescence technique is of great interest due to its visualization characteristics. The construction of a reliable fluorescent ratiometric nanoprobe for high-sensitivity visual quantification is highly sought after but it is limited by poor stability and controllability. Herein, we report a robust dual-emissive quantum dot nanohybrid with precise color tunability and demonstrate its potential as a two-signal-change ratiometric probe for visual detection. A novel assembly strategy was developed for spatially implanting hydrophobic green and red quantum dots (QDs) into a silica scaffold to form a dual-emissive hierarchical fluorescent silica nanohybrid. The fluorescence intensity ratio and color of the nanohybrid were precisely tailored by altering the amounts of green and red QDs. Particularly, after the alkylsilane-mediated phase transfer and exterior silica shell growth, the nanohybrid exhibited the well-preserved fluorescence features of the original QDs and robust optical/colloid stability. An inner filter-based ratiometric nanoprobe for the visual determination of melamine was ultimately devised by combining the spectra-overlapped two-colored fluorescent nanohybrid with analyte-specific gold nanoparticles. Furthermore, based on the reversible fluorescence signal changes in two-colored QDs induced by melamine, a logic gate strategy for melamine monitoring was constructed. The newly developed fluorescent ratiometric nanoprobe shows great prospects for the visual and quantitative determination of analytes in a complex biological matrix.
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Affiliation(s)
- Jing Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P.R. China.
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12
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Liu X, Chen D, Wang C, Tian N, Li Z, Zhang Y, Ding ZJ. A turn-on luminescence probe for highly selective detection of an anthrax biomarker. LUMINESCENCE 2020; 35:601-607. [PMID: 31916365 DOI: 10.1002/bio.3764] [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: 08/08/2019] [Revised: 10/21/2019] [Accepted: 12/11/2019] [Indexed: 01/14/2023]
Abstract
Highly selective detection of Bacillus anthrax spores has attracted worldwide attention because Bacillus anthrax spores not only are harmful to the health of human beings and animals, but also can be used as biological warfare agents. Here, we report a simple platform by mixing EuCl3 ·6H2 O and sodium polyacrylate in aqueous solution and further investigate its luminescence response towards Bacillus anthrax biomarker dipicolinic acid (DPA) as a turn-on luminescence probe. Importantly, our probe has good sensitivity, lower detection limit, excellent selectivity as well as great anti-interference ability due to the great luminescence enhancement of Eu3+ . Moreover, a test paper is constructed to realize the purpose of portable detection. These results indicate that our probe is an excellent candidate for sensing DPA.
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Affiliation(s)
- Xiao Liu
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Guangrong Dao 8, Hongqiao District, Tianjin, China
| | - Dong Chen
- Beijing Institute of Pharmaceutical Chemistry, Beijing, China
| | - Chenchen Wang
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Guangrong Dao 8, Hongqiao District, Tianjin, China
| | - Nianjuan Tian
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Guangrong Dao 8, Hongqiao District, Tianjin, China
| | - Zhiqiang Li
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Guangrong Dao 8, Hongqiao District, Tianjin, China
| | - Ying Zhang
- National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Guangrong Dao 8, Hongqiao District, Tianjin, China
| | - Zhi-Jun Ding
- Beijing Institute of Pharmaceutical Chemistry, Beijing, China
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13
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14
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Yu W, Jiang C, Xie B, Wang S, Yu X, Wen K, Lin J, Wang J, Wang Z, Shen J. Ratiometric fluorescent sensing system for drug residue analysis: Highly sensitive immunosensor using dual-emission quantum dots hybrid and compact smartphone based-device. Anal Chim Acta 2019; 1102:91-98. [PMID: 32044000 DOI: 10.1016/j.aca.2019.12.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 12/09/2019] [Accepted: 12/15/2019] [Indexed: 01/23/2023]
Abstract
Immunoassays such as the enzyme-linked immunosorbent assay (ELISA) are utilized extensively for detecting protein biomarkers and small molecules in healthcare, environmental monitoring, and food analysis. Unfortunately, the current strategies for immunoassays often require sophisticated apparatus such as a microplate reader, which might not be available in resource-limited areas. To mitigate this problem, we designed a compact smartphone based-device and a multicolor response immunosensor. First, we designed a compact and cost-effective 3D-printed attachment, where a light-emitting diode was used as a light excitation source and a smartphone captured the fluorescent emission signals. Second, by combining quantum dots hybrid and chemical redox reaction, multiple color responses were displayed in the presence of the analyte at different concentrations. Third, solutions with distinct tonality could be readily distinguished by the naked eye and they were suitable for quantitative analysis using the hue-saturation-lightness color space based on a smartphone application. The versatility of the proposed sensing system was demonstrated by implementing an indirect competitive ELISA for analyzing trace drug residues in foodstuffs. The multicolor response of this sensing strategy allows us to visually quantify drug residues in foodstuffs. Moreover, the smartphone-based immunosensor can assess the exact concentration of the analyte by using a self-designed mobile application. The proposed assay provides a highly sensitive performance that the limit of detection was 0.37 ng/mL by visual detection and 0.057 ng/mL using the compact device. Due to its advantages in terms of portability, straightforward visual detection, high sensitivity, and cost effectiveness, the proposed immunosensor has great potential for applications in areas without access to laboratories or expensive infrastructure.
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Affiliation(s)
- Wenbo Yu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, And Beijing Laboratory for Food Quality and Safety, Beijing, 100193, People's Republic of China
| | - Chengxin Jiang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Bing Xie
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, And Beijing Laboratory for Food Quality and Safety, Beijing, 100193, People's Republic of China
| | - Siyuan Wang
- Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing, 100083, People's Republic of China
| | - Xuezhi Yu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, And Beijing Laboratory for Food Quality and Safety, Beijing, 100193, People's Republic of China
| | - Kai Wen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, And Beijing Laboratory for Food Quality and Safety, Beijing, 100193, People's Republic of China
| | - Jianhan Lin
- Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing, 100083, People's Republic of China
| | - Jing Wang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.
| | - Zhanhui Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, And Beijing Laboratory for Food Quality and Safety, Beijing, 100193, People's Republic of China.
| | - Jianzhong Shen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, And Beijing Laboratory for Food Quality and Safety, Beijing, 100193, People's Republic of China.
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15
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Ratiometric fluorometric and visual determination of cyanide based on the use of carbon dots and gold nanoclusters. Mikrochim Acta 2019; 186:809. [DOI: 10.1007/s00604-019-3803-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 09/07/2019] [Indexed: 12/12/2022]
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16
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Li Z, Chen H, Li B, Xie Y, Gong X, Liu X, Li H, Zhao Y. Photoresponsive Luminescent Polymeric Hydrogels for Reversible Information Encryption and Decryption. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1901529. [PMID: 31728289 PMCID: PMC6839628 DOI: 10.1002/advs.201901529] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/21/2019] [Indexed: 05/04/2023]
Abstract
Conventional luminescent information is usually visible under either ambient or UV light, hampering their potential application in smart confidential information protection. In order to address this challenge, herein, light-triggered luminescence ON-OFF switchable hybrid hydrogels are successfully constructed through in situ copolymerization of acrylamide, lanthanide complex, and diarylethene photochromic unit. The open-close behavior of the diarylethene ring in the polymer could be controlled by UV and visible light irradiation, where the close form of the ring features fluorescence resonance energy transfer with the lanthanide complex. The hydrogel-based blocks with tunable emission colors are then employed to construct 3D information codes, which can be read out under a 254 nm UV lamp. The exposure to 300 nm UV light leads to the luminescence quenching of the hydrogels, thus erasing the encoded information. Under visible light (>450 nm) irradiation, the luminescence is recovered to make the confidential information readable again. Thus, by simply alternating the exposure to UV and visible lights, the luminescence signals could become invisible and visible reversibly, allowing for reversible multiple information encryption and decryption.
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Affiliation(s)
- Zhiqiang Li
- National‐Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources UtilizationTianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyGuangrong Dao 8, Hongqiao DistrictTianjin300130P. R. China
| | - Hongzhong Chen
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University21 Nanyang LinkSingapore637371Singapore
| | - Bin Li
- National‐Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources UtilizationTianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyGuangrong Dao 8, Hongqiao DistrictTianjin300130P. R. China
| | - Yanmiao Xie
- College of ComputerNankai UniversityNo. 38 Tongyan Road, Jinnan DistrictTianjin300350P. R. China
| | - Xiaoli Gong
- College of ComputerNankai UniversityNo. 38 Tongyan Road, Jinnan DistrictTianjin300350P. R. China
| | - Xiao Liu
- National‐Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources UtilizationTianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyGuangrong Dao 8, Hongqiao DistrictTianjin300130P. R. China
| | - Huanrong Li
- National‐Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources UtilizationTianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyGuangrong Dao 8, Hongqiao DistrictTianjin300130P. R. China
| | - Yanli Zhao
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University21 Nanyang LinkSingapore637371Singapore
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Shi H, Zhang L, Yu G, Liu Y, Chen L. Molecularly imprinted mesoporous silica incorporating C 3N 4 dots and CdTe quantum dots as ratiometric fluorescent probe for determination of Malachite Green. Mikrochim Acta 2019; 186:556. [PMID: 31327059 DOI: 10.1007/s00604-019-3670-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 07/06/2019] [Indexed: 01/27/2023]
Abstract
A new dual-emission ratiometric fluorescent probe was synthesized and successfully used for the determination of Malachite Green (MG) in fish farming water. The ratiometric fluorescent probe was successfully composited by sol-gel method using C3N4 and CdTe quantum dots as fluorescent materials combined with mesoporous molecularly imprinted polymers. MG quenches the red fluorescence of the CdTe QDs (with excitation/emission wavelengths at 350/680 nm) while the blue fluorescence of C3N4 (with excitation/emission wavelengths at 350/458 nm) remains unchanged. The change of fluorescence color and fluorescence intensity ratio can be successfully used for quantification of malachite green. In addition, the mesoporous structure has a large surface and good adsorption capacity for malachite green. The normalized intensity of fluorescence increases linearly in the 50-1000 ng·mL-1 MG concentration range, and the detection limit is 10 ng·mL-1. The imprinting factor is 3.2. The nanoprobe was applied to the determination of MG in fish farming water samples. Recoveries and relative standard deviations were 92.5-97.8% and 2.5-6.2%, respectively. Graphical abstract Schematic representation of synthesis of molecularly imprinted mesoporous silica ratiometric fluorescent probes incorporating C3N4 dots and CdTe quantum dots for determination of malachite green.
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Affiliation(s)
- Han Shi
- Department of Chemistry, College of Science, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, People's Republic of China
| | - Liang Zhang
- Department of Chemistry, College of Science, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, People's Republic of China
| | - Guoliang Yu
- Fiber Inspection Bureau of Heilongjiang Province, 100 Zhujiang Street, Nangang District, Harbin, 150030, People's Republic of China
| | - Yuting Liu
- Department of Chemistry, College of Science, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, People's Republic of China
| | - Ligang Chen
- Department of Chemistry, College of Science, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, People's Republic of China.
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18
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Double quantum dots-nanoporphyrin fluorescence-visualized paper-based sensors for detecting organophosphorus pesticides. Talanta 2019; 199:46-53. [DOI: 10.1016/j.talanta.2019.02.023] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 01/24/2019] [Accepted: 02/04/2019] [Indexed: 11/23/2022]
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19
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Manganese(II)-doped zinc/germanium oxide nanoparticles as a viable fluorescent probe for visual and time-resolved fluorometric determination of ascorbic acid and its oxidase. Mikrochim Acta 2019; 186:466. [DOI: 10.1007/s00604-019-3580-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 06/02/2019] [Indexed: 01/06/2023]
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20
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Huang X, Cui B, Ma Y, Yan X, Xia L, Zhou N, Wang M, He L, Zhang Z. Three-dimensional nitrogen-doped mesoporous carbon nanomaterials derived from plant biomass: Cost-effective construction of label-free electrochemical aptasensor for sensitively detecting alpha-fetoprotein. Anal Chim Acta 2019; 1078:125-134. [PMID: 31358210 DOI: 10.1016/j.aca.2019.06.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/28/2019] [Accepted: 06/03/2019] [Indexed: 11/26/2022]
Abstract
We synthesized three kinds of nitrogen-doped nanoporous carbon nanomaterials (represented by N-mC) through a cost-effective method, that is, pyrolysis of plant biomasses (grass, flower, and peanut shells). We further explored their potential as sensitive bioplatforms for electrochemical label-free aptasensors to facilitate the early detection of alpha-fetoprotein (AFP). Chemical structure characterizations revealed that rich functional groups coexisted in as-synthesized N-mC nanomaterials, such as C-C, C-O, C=O, C-N, and COOH. Among the three kinds of N-mC nanomaterials, the one derived from grass (N-mCg) exhibited the lowest carbon defect degree, the highest ID/IG ratio in the Raman spectra, and the largest specific surface area (186.2 m2 g-1). Consequently, N-mCg displayed excellent electrochemical activity and strong affinity toward aptamer strands, further endowing the corresponding aptasensor with sensitive detection ability for AFP. Electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) were used to investigate the whole detection procedure for AFP. The EIS and DPV results showed that the fabricated N-mCg-based aptasensor possessed an extremely low limit of detection of 60.8 and 61.8 fg·mL-1 (s/n = 3), respectively, for detecting AFP within a wide linear range from 0.1 pg mL-1 to 100 ng mL-1. Moreover, the aptasensor displayed acceptable selectivity and applicability, high reproducibility, and excellent stability in serum samples of cancer patients. Therefore, the proposed cost-effective and label-free strategy based on the nitrogen-doped nanoporous carbon derived from plant biomass is a promising approach for the early detection of various tumor markers.
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Affiliation(s)
- Xiaoyu Huang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, No. 1, Jianshe East Road, Zhengzhou, 450052, PR China
| | - Bingbing Cui
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, No. 136, Science Avenue, Zhengzhou, 450001, PR China
| | - Yashen Ma
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, No. 136, Science Avenue, Zhengzhou, 450001, PR China
| | - Xu Yan
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, No. 1, Jianshe East Road, Zhengzhou, 450052, PR China
| | - Lei Xia
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, No. 1, Jianshe East Road, Zhengzhou, 450052, PR China
| | - Nan Zhou
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, No. 1, Jianshe East Road, Zhengzhou, 450052, PR China.
| | - Minghua Wang
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, No. 136, Science Avenue, Zhengzhou, 450001, PR China
| | - Linghao He
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, No. 136, Science Avenue, Zhengzhou, 450001, PR China
| | - Zhihong Zhang
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, No. 136, Science Avenue, Zhengzhou, 450001, PR China.
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21
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Ražić S, Segundo MA, Gauglitz G. European analytical column number 47. Anal Bioanal Chem 2019; 411:3695-3698. [PMID: 31134314 DOI: 10.1007/s00216-019-01881-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Slavica Ražić
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, Belgrade, 11222, Serbia.
| | - Marcela A Segundo
- Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, R Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Günter Gauglitz
- Institute for Physical and Theoretical Chemistry, University Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
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22
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Redox modulated fluorometric sensing of ascorbic acid by using a hybrid material composed of carbon dots and CoOOH nanosheets. Mikrochim Acta 2019; 186:368. [DOI: 10.1007/s00604-019-3483-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 05/05/2019] [Indexed: 12/19/2022]
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23
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Selective and high-sensitive label-free detection of ascorbic acid by carbon nitride quantum dots with intense fluorescence from lone pair states. Talanta 2019; 196:530-536. [DOI: 10.1016/j.talanta.2019.01.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/23/2018] [Accepted: 01/02/2019] [Indexed: 12/20/2022]
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24
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Huang D, Li X, Chen M, Chen F, Wan Z, Rui R, Wang R, Fan S, Wu H. An electrochemical sensor based on a porphyrin dye-functionalized multi-walled carbon nanotubes hybrid for the sensitive determination of ascorbic acid. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.04.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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25
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Efficient dual-mode colorimetric/fluorometric sensor for the detection of copper ions and vitamin C based on pH-sensitive amino-terminated nitrogen-doped carbon quantum dots: effect of reactive oxygen species and antioxidants. Anal Bioanal Chem 2019; 411:2619-2633. [DOI: 10.1007/s00216-019-01710-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/15/2019] [Accepted: 02/19/2019] [Indexed: 12/31/2022]
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26
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Molaei MJ. Carbon quantum dots and their biomedical and therapeutic applications: a review. RSC Adv 2019; 9:6460-6481. [PMID: 35518468 PMCID: PMC9061119 DOI: 10.1039/c8ra08088g] [Citation(s) in RCA: 196] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 02/14/2019] [Indexed: 12/19/2022] Open
Abstract
In recent years, nano carbon quantum dots (CQDs) have received increasing attention due to their properties such as small size, fluorescence emission, chemical stability, water solubility, easy synthesis, and the possibility of functionalization. CQDs are fluorescent 0D carbon nanostructures with sizes below 10 nm. The fluorescence in CQDs originates from two sources, the fluorescence emission from bandgap transitions of conjugated π-domains and fluorescence from surface defects. The CQDs can emit fluorescence in the near-infrared (NIR) spectral region which makes them appropriate for biomedical applications. The fluorescence in these structures can be tuned with respect to the excitation wavelength. The CQDs have found applications in different areas such as biomedicine, photocatalysis, photosensors, solar energy conversion, light emitting diodes (LEDs), etc. The biomedical applications of CQDs include bioimaging, drug delivery, gene delivery, and cancer therapy. The fluorescent CQDs have low toxicity and other exceptional physicochemical properties in comparison to heavy metals semiconductor quantum dots (QDs) which make them superior candidates for biomedical applications. In this review, the synthesis routes and optical properties of the CQDs are clarified and recent advances in CQDs biomedical applications in bioimaging (in vivo and in vitro), drug delivery, cancer therapy, their potential to pass blood-brain barrier (BBB), and gene delivery are discussed.
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Affiliation(s)
- Mohammad Jafar Molaei
- Faculty of Chemical and Materials Engineering, Shahrood University of Technology Shahrood Iran
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27
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Cobalt oxyhydroxide modified with poly-β-cyclodextrin and a cyanine dye as a nanoplatform for two-photon imaging of ascorbic acid in living cells and tissue. Mikrochim Acta 2019; 186:201. [PMID: 30796531 DOI: 10.1007/s00604-019-3320-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 02/13/2019] [Indexed: 01/26/2023]
Abstract
This article describes the development of several nanoconjugates composed of cobalt (III) oxyhydroxide and DEASPI/βCDP, where DEASPI stands for the dye trans-4-[p-(N,N-diethylamino)styryl]-N-methylpyridinium, and βCDP stands for β-cyclodextrin. The material enables sensitive fluorometric detection and 3D imaging of ascorbic acid (AA) in biological samples. A nanomicelle composed of DEASPI and βCDP was prepared to act as a two-photon absorbance (TPA) nanofluorophore with desirable two-photon-sensitized fluorescence, high penetration depth, and excellent cell-permeability). The CoOOH nanoflakes were placed on the surface of the nanomicelle to act as both a quencher of fluorescence and as the recognition unit for AA. In the presence of AA, the CoOOH nanoflakes are reduced to Co (II), and this triggers the recovery of fluorescence. This new nanoprobe exhibits amplified two-photon fluorescence (excitation at 840 nm; emission at 565 nm), high sensitivity, and good selectivity. In-vitro imaging of endogenous AA was demonstrated in living HeLa cells. It was also employed to 3D imaging of exogenous AA in tissue by two-photon excitation microscopy to a depth of up to 320 μm. In our perception, this nanoprobe represents a valuable tool for elucidating the roles of AA in biochemical and clinical studies. Graphical abstract Schematic presentation of the preparation of a novel Poly β-Cyclodextrin/TPdye conjugated with cobalt oxyhydroxide nanoplatform and its application for high sensitive and two-photon 3D imaging of ascorbic acid (AA) in living cells and deep tissues.
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28
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Abd Ali LI, Qader AF, Salih MI, Aboul-Enein HY. Sensitive spectrofluorometric method for the determination of ascorbic acid in pharmaceutical nutritional supplements using acriflavine as a fluorescence reagent. LUMINESCENCE 2019; 34:168-174. [PMID: 30637913 DOI: 10.1002/bio.3589] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/29/2018] [Accepted: 12/12/2018] [Indexed: 12/22/2022]
Abstract
An easily performed, specific, sensitive, rapid, reliable and inexpensive procedure for the spectrofluorometric quantitation of ascorbic acid was proposed using acriflavine as a fluorescence quenching reagent. The procedure was based on the determined quenching effect of ascorbic acid on the natural fluorescence signal of acriflavine and the reaction between ascorbic acid and acriflavine in Britton-Robinson buffer solution (pH 6) to produce an ion-associated complex. The reduction in acriflavine fluorescence intensity was detected at 505 nm, while excitation occurred at 265 nm. The relationship between quenching fluorescence intensity (∆F) and concentration of ascorbic acid was linear (R2 = 0.9967) within the range 2-10 μg/ml and with a detection limit of 0.08 μg/ml. No significant interference was detected from other materials often found in pharmaceutical nutritional tablets. The obtained results were compared with those from high-performance liquid chromatography and appeared in good agreement, with no important differences in precision or accuracy. The proposed spectrofluorimetric method was used to determine the amount of ascorbic acid in a number of commercial pharmaceutical nutritional supplement tablets with a 95% confidence performance.
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Affiliation(s)
- Layth I Abd Ali
- Department of Chemistry, Faculty of Science & Health, Koya University, Koya, Kurdistan Region - F.R., Iraq
| | - Aryan F Qader
- Department of Chemistry, Faculty of Science & Health, Koya University, Koya, Kurdistan Region - F.R., Iraq
| | - Musher I Salih
- Department of Chemistry, Faculty of Science & Health, Koya University, Koya, Kurdistan Region - F.R., Iraq
| | - Hassan Y Aboul-Enein
- Pharmaceutical and Medicinal Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Center, Dokki, Cairo, Egypt
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29
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Tannic acid-derivatized graphitic carbon nitride quantum dots as an “on-off-on” fluorescent nanoprobe for ascorbic acid via copper(II) mediation. Mikrochim Acta 2019; 186:87. [DOI: 10.1007/s00604-018-3203-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 12/20/2018] [Indexed: 01/26/2023]
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30
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Lu Q, Chen X, Liu D, Wu C, Liu M, Li H, Zhang Y, Yao S. A turn-on fluorescent probe for vitamin C based on the use of a silicon/CoOOH nanoparticle system. Mikrochim Acta 2019; 186:72. [DOI: 10.1007/s00604-018-3181-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 12/14/2018] [Indexed: 12/13/2022]
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31
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Kanagasubbulakshmi S, Kadirvelu K. Photoinduced holes transfer based visual determination of dopamine in human serum. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 206:512-519. [PMID: 30176427 DOI: 10.1016/j.saa.2018.08.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 08/22/2018] [Accepted: 08/26/2018] [Indexed: 06/08/2023]
Abstract
A simple unexplored strategy was followed to construct ratiometric fluorescence-based sensing system for the detection of dopamine (DA) in human serum. Ratiometric fluorescence system was constructed through bonding energy transfer (TBET) by conjugating carboxyl functionalized CdTe quantum dots (QDs) and amine-capped Carbon quantum dots (CQDs). The photophysical properties of sensing system were characterized by standard methods. Photoluminescence (PL) of sensing system under excitonic wavelength (350 nm) depends on dual emission at 440 and 595 nm that corresponds to CQDs and CdTe QDs respectively. The developed sensing system was utilized for visual determination of DA, an unquenched blue fluorescence of CQDs in ratiometric system reveals the visual color differentiation for DA binding with CdTe QDs among the possible interferences (Alanine, Glycine, Glucose, Sucrose, Urea and Ascorbic acid). The limit of detection (LOD) and quantification (LOQ) was calculated as 8.1 and 27.2 nm respectively by using regression analysis. Photoinduced holes transfer (PHT) might have attributed the possible sensing mechanism for DA that quench the photoluminescence sequentially to enhance the sensing performance of QDs. The matrix interferences and reliability of the developed sensing platform were evaluated by testing DA spiked human serum and the sensing response was found to be field deployable.
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Affiliation(s)
- S Kanagasubbulakshmi
- DRDO-BU Center for Life Sciences, Bharathiar University Campus, Coimbatore 641046, Tamil Nadu, India
| | - K Kadirvelu
- DRDO-BU Center for Life Sciences, Bharathiar University Campus, Coimbatore 641046, Tamil Nadu, India.
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32
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Singha D, Das T, Satyanarayana L, Roy P, Nandi M. Rhodamine functionalized mesoporous silica as a chemosensor for the efficient sensing of Al3+, Cr3+ and Fe3+ ions and their removal from aqueous media. NEW J CHEM 2019. [DOI: 10.1039/c9nj03010g] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Rhodamine incorporated mesoporous silica acts as a selective chemosensor for Al3+, Cr3+ and Fe3+ ions and it is used for their separation from an aqueous medium.
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Affiliation(s)
- Debdas Singha
- Integrated Science Education and Research Centre
- Siksha Bhavana
- Visva-Bharati University
- India
| | - Trisha Das
- Integrated Science Education and Research Centre
- Siksha Bhavana
- Visva-Bharati University
- India
| | - Lanka Satyanarayana
- Analytical Chemistry Department
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007
- India
| | - Partha Roy
- Department of Chemistry
- Jadavpur University
- Kolkata-700 032
- India
| | - Mahasweta Nandi
- Integrated Science Education and Research Centre
- Siksha Bhavana
- Visva-Bharati University
- India
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Mustard seeds derived fluorescent carbon quantum dots and their peroxidase-like activity for colorimetric detection of H 2O 2 and ascorbic acid in a real sample. Anal Chim Acta 2018; 1054:145-156. [PMID: 30712585 DOI: 10.1016/j.aca.2018.12.024] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 12/17/2018] [Indexed: 11/21/2022]
Abstract
Herein, we were synthesized fluorescent carbon quantum dots via facile one-step hydrothermal treatment of mustard seeds (M-CQDs). It showed excellent optical property with fluorescent quantum yield 4.6%. The as-prepared M-CQDs exhibited peroxidase-like mimetic activity and catalyzed the oxidation of chromogenic substrate 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H2O2 to produce a blue color reaction mixture with the prominent peak at 652 nm. Furthermore, the peroxidase-like catalytic performance of M-CQDs followed the steady-state kinetics behavior and exhibited similar catalytic activity as that of natural enzyme Horseradish peroxidase (HRP). In addition to this, the double reciprocal plot showed a parallel line which suggested the occurrence of Ping-Pong type of mechanism. The H2O2 dependent oxidation of TMB was helpful for the colorimetric detection of H2O2 in the linear range of 0.02-0.20 mM with the limit of detection (LOD) of 0.015 mM. Interestingly, the oxidized TMB (ox-TMB) was further reduced to native TMB by the reducing agent ascorbic acid. Hence M-CQDs showed its potential towards the selective and sensitive detection of ascorbic acid in the linear range of 10-70 μM having a correlation coefficient of 0.998 with LOD of 3.26 μM. The practical feasibility of the proposed detection method of AA was also investigated in common fresh fruits.
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Zhang LJ, Xia L, Xie HY, Zhang ZL, Pang DW. Quantum Dot Based Biotracking and Biodetection. Anal Chem 2018; 91:532-547. [DOI: 10.1021/acs.analchem.8b04721] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Li-Juan Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, The Institute for Advanced Studies, and Wuhan Institute of Biotechnology, Wuhan University, Luojia Hill, Wuhan 430072, P.R. China
| | - Li Xia
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, The Institute for Advanced Studies, and Wuhan Institute of Biotechnology, Wuhan University, Luojia Hill, Wuhan 430072, P.R. China
| | - Hai-Yan Xie
- School of Life Science, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Zhi-Ling Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, The Institute for Advanced Studies, and Wuhan Institute of Biotechnology, Wuhan University, Luojia Hill, Wuhan 430072, P.R. China
| | - Dai-Wen Pang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, The Institute for Advanced Studies, and Wuhan Institute of Biotechnology, Wuhan University, Luojia Hill, Wuhan 430072, P.R. China
- College of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, P.R. China
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35
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Miao Y, Gu C, Zhu Y, Yu B, Shen Y, Cong H. Recent Progress in Fluorescence Imaging of the Near‐Infrared II Window. Chembiochem 2018; 19:2522-2541. [DOI: 10.1002/cbic.201800466] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Indexed: 01/16/2023]
Affiliation(s)
- Yawei Miao
- Institute of Biomedical Materials and EngineeringCollege of Materials Science and EngineeringLaboratory for New Fiber Materials and Modern Textile, Growing Base for State Key LaboratoryCollege of Chemistry and Chemical EngineeringQingdao University Qingdao 266071 P.R. China
| | - Chuantao Gu
- Institute of Biomedical Materials and EngineeringCollege of Materials Science and EngineeringLaboratory for New Fiber Materials and Modern Textile, Growing Base for State Key LaboratoryCollege of Chemistry and Chemical EngineeringQingdao University Qingdao 266071 P.R. China
| | - Yaowei Zhu
- Institute of Biomedical Materials and EngineeringCollege of Materials Science and EngineeringLaboratory for New Fiber Materials and Modern Textile, Growing Base for State Key LaboratoryCollege of Chemistry and Chemical EngineeringQingdao University Qingdao 266071 P.R. China
| | - Bing Yu
- Institute of Biomedical Materials and EngineeringCollege of Materials Science and EngineeringLaboratory for New Fiber Materials and Modern Textile, Growing Base for State Key LaboratoryCollege of Chemistry and Chemical EngineeringQingdao University Qingdao 266071 P.R. China
| | - Youqing Shen
- Institute of Biomedical Materials and EngineeringCollege of Materials Science and EngineeringLaboratory for New Fiber Materials and Modern Textile, Growing Base for State Key LaboratoryCollege of Chemistry and Chemical EngineeringQingdao University Qingdao 266071 P.R. China
- Center for Bionanoengineering and Key Laboratory of Biomass, Chemical Engineering of Ministry of EducationCollege of Chemical and Biological EngineeringZhejiang University Hangzhou 310027 P.R. China
| | - Hailin Cong
- Institute of Biomedical Materials and EngineeringCollege of Materials Science and EngineeringLaboratory for New Fiber Materials and Modern Textile, Growing Base for State Key LaboratoryCollege of Chemistry and Chemical EngineeringQingdao University Qingdao 266071 P.R. China
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36
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Liang SS, Deng X, Fan YY, Li J, Wang M, Zhang ZQ. A ratiometric fluorometric heparin assay based on the use of CdTe and polyethyleneimine-coated carbon quantum dots. Mikrochim Acta 2018; 185:519. [PMID: 30361934 DOI: 10.1007/s00604-018-3061-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 10/19/2018] [Indexed: 12/15/2022]
Abstract
CdTe quantum dots (QDs) were integrated with polyethyleneimine-coated carbon dots (PEI-CDs) to form a dually emitting probe for heparin. The red fluorescence of the CdTe QDs is quenched by the PEI-CDs due to electrostatic interactions. In the presence of heparin, the blue fluorescence of PEI-CDs remains unaffected, while its quenching effect on the fluorescence of CdTe QDs is strongly reduced. A ratiometric fluorometric assay was worked out. The ratio of the fluorescences at 595 and 436 nm serves as the analytical signal. Response is linear in the concentration range of 50-600 ng·mL-1 (0.1-1.2 U·mL-1) of heparin. The limit of detection is 20 ng·mL-1 (0.04 U·mL-1). This makes the method a valuable tool for heparin monitoring during postoperative and long-term care. This assay is relatively free from the interference by other analogues which commonly co-exist with heparin in samples, and it is more robust than single-wavelength based assays. Graphical abstract In the presence of heparin, the fluorescence of polyethyleneimine-coated carbon dots (PEI-CDs) at 436 nm remains unaffected, while its quenching effect on the fluorescence of CdTe at 595 nm is strongly reduced.
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Affiliation(s)
- Si-Si Liang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Shaanxi Normal University, Xi'an, 710062, China.,Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an, 710062, China.,School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China.,Department of Chemistry and Chemical Engineering, Ankang University, Ankang, 725000, Shaanxi, China
| | - Xu Deng
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Shaanxi Normal University, Xi'an, 710062, China.,Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an, 710062, China.,School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Yao-Yao Fan
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Shaanxi Normal University, Xi'an, 710062, China.,Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an, 710062, China.,School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Jun Li
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Shaanxi Normal University, Xi'an, 710062, China.,Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an, 710062, China.,School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Man Wang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Shaanxi Normal University, Xi'an, 710062, China.,Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an, 710062, China.,School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Zhi-Qi Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Shaanxi Normal University, Xi'an, 710062, China. .,Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, Shaanxi Normal University, Xi'an, 710062, China. .,School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China.
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37
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Guo H, Li J, Li Y, Wu D, Ma H, Wei Q, Du B. Exciton energy transfer-based fluorescent sensor for the detection of Hg 2+ through aptamer-programmed self-assembly of QDs. Anal Chim Acta 2018; 1048:161-167. [PMID: 30598146 DOI: 10.1016/j.aca.2018.10.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 09/17/2018] [Accepted: 10/09/2018] [Indexed: 11/15/2022]
Abstract
Herein, an original exciton energy transfer-based sensitive fluorescence sensor for the determination of Hg2+ has been designed through DNA aptamer-programmed self-assembly of CdTe quantum dots (QDs). In this work, CdTe QDs were applied as fluorescence signal source. The two pieces of T-rich aptamer played a role as molecular recognition probes which could bind to the target Hg2+ specifically. The extent of Hg2+-triggered self-assembly of QDs depended on the concentration of Hg2+, which resulted in an exciton energy transfer effect between QDs, giving an obvious fluorescence signal decrease and red-shift of the fluorescent peak. Based on this principle, we could detect the Hg2+ in two different signal modes. The limit of detection (LOD) was 3.33 nM. The proposed sensing method exhibited its application in detecting Hg2+ in real water samples with satisfactory performance. The results indicated that this proposed sensor will be of great potential in biological and analytical fields.
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Affiliation(s)
- Huan Guo
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Jingshuai Li
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Yuewen Li
- School of Resources and Environment, University of Jinan, Jinan, 250022, PR China
| | - Dan Wu
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Hongmin Ma
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Qin Wei
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Bin Du
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China.
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38
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Chen A, Peng X, Pan Z, Shao K, Wang J, Fan M. Visual Assay of Glutathione in Vegetables and Fruits Using Quantum Dot Ratiometric Hybrid Probes. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:6431-6438. [PMID: 29863863 DOI: 10.1021/acs.jafc.8b00662] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Future food safety monitoring with simple, fast, and visual methods has become increasingly important. Accordingly, this work was designed to construct a new-style dual-emission ratiometric fluorescent probe (CdSe@SiO2@CdTe) for visual assay of glutathione (GSH) with a "turn on" strategy. After adding Hg2+, the red fluorescence of the outer CdTe quantum dots (QDs) was quenched through both electron transfer and ion-binding processes. Upon the addition of GSH, the red fluorescence occurred again owing to the strong affinity between GSH and Hg2+, whereas the inner green fluorescence of CdSe QDs was unchanged, leading to a clearly recognizable fluorescence color change (from green to orange-red). In the concentration range from 0.1 to 10 μM, the relative fluorescence intensity ratios ( I619/ I535) showed an excellent linear correlation with the concentration of GSH, and the detection limit was as low as 42 nM under optimal conditions. Meanwhile, the ratiometric hybrid probes were successfully applied for direct visual sensing GSH in real vegetable and fruit samples.
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Affiliation(s)
- Aimin Chen
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
- Departments of Chemical and Petroleum Engineering , University of Wyoming , Laramie , Wyoming 82071 , United States
| | - Xiao Peng
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Zaifa Pan
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Kang Shao
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Jing Wang
- College of Chemical Engineering , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Maohong Fan
- Departments of Chemical and Petroleum Engineering , University of Wyoming , Laramie , Wyoming 82071 , United States
- School of Energy Resources , University of Wyoming , Laramie , Wyoming 82071 , United States
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