1
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Wei B, Zhu W, Li K, Liu Q, Zhang J, Kou H, Xu C, He L, Wang H. Natural collagen peptides-encapsulated gold nanoclusters for the simultaneous detection of multiple antibiotics in milk and molecular logic operations. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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2
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Huang W, Wang Y, Wang L, Pan C, Shen G. Colorimetric detection of ciprofloxacin in aqueous solution based on an unmodified aptamer and the aggregation of gold nanoparticles. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:90-98. [PMID: 33300899 DOI: 10.1039/d0ay01811b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A colorimetric method is described for detection of the antibiotic ciprofloxacin (CIP) in aqueous solutions based on an unmodified CIP-aptamer and gold nanoparticles (AuNPs), which are regarded as a probe and an indicator, respectively. In the absence of CIP, aptamers can hybridize with poly dimethyl diallyl ammonium chloride (PDDA) to form a 'duplex' structure through electrostatic interactions, and AuNPs remain dispersed in solution, leading to a red solution and an obvious absorption peak at 520 nm. Contrarily, the CIP-aptamer can specifically bind to CIP after the introduction of CIP into the solution. Then PDDA is thus free to aggregate AuNPs. The solution turns blue from red accordingly, presenting a strong absorption at 650 nm. Hence, the concentration of CIP can be quantified through the changes of the absorption. This sensitive and selective colorimetric method for CIP detection has a good linear response (R = 0.9935) in the 20 to 300 nM CIP concentration range, with a limit of detection (LOD) of 0.215 nM. Importantly, the proposed aptasensor demonstrates great application potential in CIP determination in aqueous samples.
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Affiliation(s)
- Weiwen Huang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.
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3
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Pavão e Pavão D, Nascimento Botelho C, Nunes Fernandes R, Costa dos Santos C, Santos Damos F, Cássia Silva Luz R. A Simple, Cost‐effective, and Environmentally Friendly Method for Determination of Ciprofloxacin in Drugs and Urine Samples Based on Electrogenerated Chemiluminescence. ELECTROANAL 2020. [DOI: 10.1002/elan.201900355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | | | | | - Flavio Santos Damos
- Department of ChemistryFederal University of Maranhão 65080-805 São Luís MA Brazil
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4
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Cao L, Li Z, Jia R, Chen L, Wu Y, Di J. Sensitive Photoelectrochemical Determination of Ciprofloxacin Using an Indium Tin Oxide Photoelectrode Modified with Small Gold Nanoparticles. ANAL LETT 2020. [DOI: 10.1080/00032719.2019.1709481] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ling Cao
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, China
| | - Zheng Li
- Yuhang District Center for Disease Control and Prevention, Hangzhou, Zhejiang Province, China
| | - Rui Jia
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, China
| | - Li Chen
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, China
| | - Ying Wu
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, China
| | - Junwei Di
- College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, China
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5
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Xia H, Peng M, Li N, Liu L. CdSe quantum dots-sensitized FRET system for ciprofloxacin detection. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2019.137085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Ultrasensitive ciprofloxacin assay based on the use of a fluorescently labeled aptamer and a nanocomposite prepared from carbon nanotubes and MoSe 2. Mikrochim Acta 2019; 186:507. [PMID: 31270699 DOI: 10.1007/s00604-019-3629-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 06/19/2019] [Indexed: 12/20/2022]
Abstract
A nanocomposite was prepared from carbon nanotubes and MoSe2 (CNT-MoSe2). This nanomaterial quenches the fluorescence of fluorescein-labeled aptamers. When ciprofloxacin (CIP) binds to the aptamer, an aptamer/G-quadruplex complex will be formed and the interaction between labeled aptamer and CNT-MoSe2 nanostructures is weakened. This leads to significant fluorescence recovery. Under optimized experimental conditions, the limit of detection is 0.63 ng mL-1 with a good linearity in the range from 0.63 to 80 ng mL-1. The assay was applied to the determination of CIP in spiked milk, and the recoveries range between 94.3 and 97.0% (n = 3). Conceivably, the method is a generic approach that can be extended to the determination of other analyte for which adequate aptamers are available. Graphical abstract Schematic presentation of CNT-MoSe2 quenching based aptamer assay for the detection of ciprofloxacin. The assay exhibits good selectivity, stability and reproducibility, and low limit of detection.
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7
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Kayal S, Mandal A, Pramanik P, Halder M. Hypothesizing the applicability of the principle of linear combination in predicting sensing behaviors of quantum dots: A deeper understanding of the precise tuning of quantum dot properties with capping composition. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.12.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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8
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Zhu S, Cao H, Yan X, Sun J, Qiu J, Qu X, Zuo YN, Wang X, Zhao XE. A convenient fluorescent assay for quinolones based on their inhibition towards the oxidase-like activity of Cu2+. NEW J CHEM 2019. [DOI: 10.1039/c8nj06285d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work reports on a novel and convenient fluorescent assay for four quinolones including nalidixic acid, cinoxacin, ciprofloxacin and moxifloxacin, with Cu2+-triggered and quinolone-inhibited oxidation of o-phenylenediamine.
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Affiliation(s)
- Shuyun Zhu
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu City
- China
| | - Han Cao
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu City
- China
| | - Xiaolu Yan
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu City
- China
| | - Jing Sun
- Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources
- Northwest Institute of Plateau Biology
- Chinese Academy of Sciences
- Xining City
- China
| | - Jiayi Qiu
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu City
- China
| | - Xiaoqing Qu
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu City
- China
| | - Ya-Nan Zuo
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu City
- China
| | - Xiao Wang
- Shandong Key Laboratory of TCM Quality Control Technology
- Shandong Analysis and Test Center
- Qilu University of Technology (Shandong Academy of Sciences)
- 19 Keyuan Street
- Jinan 250014
| | - Xian-En Zhao
- College of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu City
- China
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9
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Detection of ciprofloxacin through surface plasmon resonance nanosensor with specific recognition sites. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1302-1318. [DOI: 10.1080/09205063.2018.1457417] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Song Y, Bai J, Zhang R, He H, Li C, Wang J, Li S, Peng Y, Ning B, Wang M, Gao Z. Michael-Addition-Mediated Photonic Crystals Allow Pretreatment-Free and Label-Free Sensoring of Ciprofloxacin in Fish Farming Water. Anal Chem 2017; 90:1388-1394. [DOI: 10.1021/acs.analchem.7b04655] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yanqiu Song
- College
of Food Science and Engineering, Shandong Agricultural University, Tai’an 271018, P. R. China
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Jialei Bai
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Rong Zhang
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Houluo He
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Chao Li
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Jiang Wang
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Shuang Li
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Yuan Peng
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Baoan Ning
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
| | - Minglin Wang
- College
of Food Science and Engineering, Shandong Agricultural University, Tai’an 271018, P. R. China
| | - Zhixian Gao
- Tianjin
Key Laboratory of Risk Assessment and Control Technology for Environment
and Food Safety, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P. R. China
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11
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Simultaneous detection of folic acid and methotrexate by an optical sensor based on molecularly imprinted polymers on dual-color CdTe quantum dots. Anal Chim Acta 2017; 996:64-73. [DOI: 10.1016/j.aca.2017.10.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 09/27/2017] [Accepted: 10/03/2017] [Indexed: 12/28/2022]
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12
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Okan M, Sari E, Duman M. Molecularly imprinted polymer based micromechanical cantilever sensor system for the selective determination of ciprofloxacin. Biosens Bioelectron 2017; 88:258-264. [DOI: 10.1016/j.bios.2016.08.047] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/04/2016] [Accepted: 08/16/2016] [Indexed: 10/21/2022]
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13
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Sadeghi S, Jahani M, Belador F. The development of a new optical sensor based on the Mn doped ZnS quantum dots modified with the molecularly imprinted polymers for sensitive recognition of florfenicol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 159:83-89. [PMID: 26828536 DOI: 10.1016/j.saa.2016.01.043] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Revised: 01/21/2016] [Accepted: 01/23/2016] [Indexed: 06/05/2023]
Abstract
The Mn doped ZnS quantum dots (Mn:ZnS QDs) capped with the florfenicol molecularly imprinted polymer (Mn:ZnS QDs@MIP) were prepared via the sol-gel surface imprinting approach using 3-aminopropyltriethoxysilane (APTES) as the functional monomer and tetraethoxysilane (TEOS) as the cross-linker for the optosensing of the florfenicol. Transmission electron microscopy (TEM), X-ray diffractometer, IR spectroscopy, UV-Vis absorption spectrophotometry, and spectrofluorometry were used to elucidate the formation, morphology, and identification of the products. To illustrate the usefulness of the new imprinted material, the non-imprinted coated Mn:ZnS QDs (Mn:ZnS QDs@NIP) were synthesized without the presence of the florfenicol. It was revealed that the fluorescence (FL) intensity of the Mn:ZnS QDs@MIP increased with increasing the FF concentration. Under the optimal conditions, changes in the FL intensity in the presence of the target molecule showed a linear response in the concentration range of 30-700 μmol L(-1) with a detection limit of 24 μmol L(-1). The developed method was finally applied successfully to the determination of FF in different meat samples with satisfactory recoveries.
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Affiliation(s)
- Susan Sadeghi
- Department of Chemistry, Faculty of Science, University of Birjand, Birjand, Iran.
| | - Moslem Jahani
- Department of Chemistry, Faculty of Science, University of Birjand, Birjand, Iran
| | - Foroogh Belador
- Department of Chemistry, Faculty of Science, University of Birjand, Birjand, Iran
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14
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Abstract
At this post-genomic era, the focus of life science research has shifted from life genetic information to general biofunctions. Biomolecular sensors based on QDs will play an important role in the identification and detection of biomolecules.
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Affiliation(s)
| | - Jinzhi Lv
- Shanxi Normal University
- Linfen 041004
- PR China
| | - Yan Li
- Shanxi Normal University
- Linfen 041004
- PR China
| | - Guiqin Yan
- Shanxi Normal University
- Linfen 041004
- PR China
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15
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Pedram P, Mahani M, Torkzadeh-Mahani M, Hasani Z, Ju H. Cadmium sulfide quantum dots modified with the human transferrin protein siderophiline for targeted imaging of breast cancer cells. Mikrochim Acta 2015. [DOI: 10.1007/s00604-015-1593-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Li D, Jia S, Fodjo EK, Xu H, Kong C, Wang Y. Highly sensitive “turn-on” fluorescence probe for the detection of sparfloxacin in human serum using silica-functionalized CdTe quantum dots. RSC Adv 2015. [DOI: 10.1039/c5ra21587k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The hydrophilic carboxyl-capped CdTe@SiO2 quantum dots (SQDs) can served as a “turn-on” photoluminescence (PL) probe for highly sensitive and selective detection of sparfloxacin in human serum.
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Affiliation(s)
- Dan Li
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Shaojie Jia
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Essy Kouadio Fodjo
- Laboratory of Physical Chemistry
- University Felix Houphouet Boigny
- 22 BP 582 Abidjan 22
- Cote d’Ivoire
| | - Hu Xu
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
| | - Cong Kong
- East China Sea Fisheries Research Institute
- Chinese Academy of Fishery Sciences
- China
| | - Yuhong Wang
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- P. R. China
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17
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Gore AH, Vatre SB, Anbhule PV, Han SH, Patil SR, Kolekar GB. Direct detection of sulfide ions [S2-] in aqueous media based on fluorescence quenching of functionalized CdS QDs at trace levels: analytical applications to environmental analysis. Analyst 2013; 138:1329-33. [PMID: 23334151 DOI: 10.1039/c3an36825d] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, simple but highly selective fluorescent probe is developed for the direct detection of sulfide ions [S(2-)] based on the fluorescence quenching of the functionalized CdS QDs in aqueous solution at trace levels and successfully applied for quantitation of S(2-) from water samples in a complex matrix exclusive of pretreatment by standard addition method.
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Affiliation(s)
- Anil H Gore
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, 416 004, Maharashtra, India
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18
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Aucélio RQ, Peréz-Cordovés AI, Xavier Lima JL, Ferreira ABB, Esteva Guas AM, da Silva AR. Determination of lapachol in the presence of other naphthoquinones using 3MPA-CdTe quantum dots fluorescent probe. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 100:155-160. [PMID: 22591798 DOI: 10.1016/j.saa.2012.04.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 03/20/2012] [Accepted: 04/05/2012] [Indexed: 05/31/2023]
Abstract
3MPA-CdTe QDs in aqueous dispersion was used as a fluorescent probe for the determination of lapachol, a natural naphthoquinone found in plants of the Bignoniaceae family genus Tabebuia. Working QDs dispersions (4.5×10(-8) mol L(-1) of QDs) was prepared in aqueous media containing Tris-HCl buffer pH 7.4 and methanol (10% in volume). The excitation was made at 380 nm with signal measurement at 540 nm. To establish a relationship between fluorescence (corrected to inner filter effect) and concentration of lapachol, a Stern-Volmer model was used. The linear range obtained was from 1.0×10(-5) to 1.0×10(-4) mol L(-1). The limit of detection (x(b)-3s(b)) was 8.0×10(-6) mol L(-1). The 3MPA-CdTe QDs probe was tested in the determination of lapachol in urine, previously cleansed in an acrylic polymer. The average recovery was satisfactory.
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Affiliation(s)
- Ricardo Q Aucélio
- Chemistry Department, Pontifícia Universidade Católica do Rio de Janeiro, 22451-900 Rio de Janeiro, RJ, Brazil
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19
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Gore AH, Gunjal DB, Kokate MR, Sudarsan V, Anbhule PV, Patil SR, Kolekar GB. Highly selective and sensitive recognition of cobalt(II) ions directly in aqueous solution using carboxyl-functionalized CdS quantum dots as a naked eye colorimetric probe: applications to environmental analysis. ACS APPLIED MATERIALS & INTERFACES 2012; 4:5217-5226. [PMID: 22948013 DOI: 10.1021/am301136q] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Quantum dots (QDs) are usually used as fluorescent probe, and they are difficult to use in colorimetric detection. However, in this report carboxyl-functionalized CdS (COF-CdS) QDs were synthesized in aqueous solution for colorimetric detection following a classic method. On the basis of inducing the aggregation of COF-CdS QDs, a simple naked eye colorimetric method with high sensitivity and selectivity was developed for the sensing of Co(2+) ions in aqueous solutions. The Co(2+) ions induced COF-CdS QDs results in a marked enhancement of the UV-vis absorption spectra at 360 nm, and the process was accompanied by a visible color change from colorless to yellowish brown within 5 min, which proves a sensitive detection of Co(2+) ions. The sensing of Co(2+) ions can therefore be easily achieved by a UV-vis spectrophotometer or even by the naked eye. Under the optimized circumstances, this method yields excellent sensitivity (LOD = 0.23 μg mL(-1)) and selectivity toward Co(2+) ions. The calibration plot of (A - A(0)) at 360 nm against concentration of Co(2+) ions was linear over the range from 0.5 to 14 μg mL(-1) with a correlation coefficient of 0.9996. The accuracy and reliability of the method were further ascertained by recovery studies via standard addition method with percent recoveries in the range of 99.63-102.46%. The plausible mechanism for the color change reaction has also been discussed. Our attempt may provide a cost-effective, rapid, and simple solution for the inspection of Co(2+) ions in the presence of a complex matrix from environmental aqueous samples.
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Affiliation(s)
- Anil H Gore
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur-416 004, Maharashtra, India
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20
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Gao C, Liu Z, Chen J, Yan Z. A novel fluorescent assay for oxytetracycline hydrochloride based on fluorescence quenching of water-soluble CdTe nanocrystals. LUMINESCENCE 2012; 28:378-83. [DOI: 10.1002/bio.2393] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 03/11/2012] [Accepted: 05/15/2012] [Indexed: 11/06/2022]
Affiliation(s)
| | - Zhen Liu
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing; 210009; China
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21
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Hu M, Yu H, Wei F, Xu G, Yang J, Cai Z, Hu Q. Citrate-capped Mn-modified CdSe/CdS quantum dots as luminescent probes for levodopa detection in aqueous solution. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 91:130-135. [PMID: 22366624 DOI: 10.1016/j.saa.2012.01.081] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 01/13/2012] [Accepted: 01/30/2012] [Indexed: 05/31/2023]
Abstract
A novel kind of citrate capped Mn-modified CdSe/CdS quantum dots (QDs) was developed. The Mn-modified CdSe/CdS QDs had a narrow, symmetric emission and strong fluorescence with quantum yield over 41%. The interaction between the QDs and levodopa was investigated. The results showed that levodopa selectively quenched the fluorescence intensity of the QDs. Based on the fluorescence quenching of the synthesized QDs by levodopa, a simple, rapid and specific quantitative method for levodopa was proposed. The factors affecting the fluorescence detection for levodopa were studied. Under the optimum conditions, the quenched intensity of the fluorescence versus levodopa concentration from 1 to 100 μM gave a linear response with an excellent correlation coefficient of 0.9996, and the limit of detection (3σ/K) was 2 × 10(-7)M. The contents of levodopa in pharmaceutical tablets were determined by the proposed method and the results agreed with the claimed values.
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Affiliation(s)
- Miao Hu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 210029, PR China
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22
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Liu L, Xiao L, Zhu HY. Preparation and characterization of CS–Fe3O4@ZnS:Mn magnetic-fluorescent nanoparticles in aqueous media. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.04.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Wei G, Yan M, Ma L, Zhang H. The synthesis of highly water-dispersible and targeted CdS quantum dots and it is used for bioimaging by confocal microscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 85:288-292. [PMID: 22041502 DOI: 10.1016/j.saa.2011.10.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 09/29/2011] [Accepted: 10/07/2011] [Indexed: 05/31/2023]
Abstract
Synthesis of a highly dispersed hydrophilic CdS nanocrystals and their use as fluorescence labeling for live cell imaging is reported here. By carefully manipulating the surface of CdS nanocrystals, the dispersions of CdS-MAA-PEI-FA nanocrystals with high photostability is prepared. The receptor-mediated delivery of folic acid conjugated quantum dots into folate-receptor-positive cell lines such as CBRH7919 liver cancer cells was demonstrated by confocal microscopy. In the future, the further modified CdS nanoparticles can be used for the tissue imaging in vivo studies.
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Affiliation(s)
- Guangcheng Wei
- Department of Pharmacy Science, Binzhou Medical College, Yantai, 264003, China
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24
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Gore AH, Mote US, Tele SS, Anbhule PV, Rath MC, Patil SR, Kolekar GB. A novel method for ranitidine hydrochloride determination in aqueous solution based on fluorescence quenching of functionalised CdS QDs through photoinduced charge transfer process: spectroscopic approach. Analyst 2011; 136:2606-12. [PMID: 21519628 DOI: 10.1039/c0an01038c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel method for the quantitative determination of ranitidine hydrochloride (RNH) based on the fluorescence quenching of functionalised CdS quantum dots (QDs) by RNH in aqueous solution was proposed. The method is simple, rapid, specific and highly sensitive with good precision. The thioglycolic acid (TGA)-capped CdS QDs were synthesized from cadmium nitrate and sodium sulfide in alkaline solution. Under the optimal conditions, the Stern-Volmer calibration plot of F(0)/F against concentration of RNH was linear in the range of 0.50-15.0 μg mL(-1) with a correlation coefficient of 0.996. The limit of detection (LOD) was 0.38 μg mL(-1). The method was satisfactorily applied to the direct determination of RNH in pharmaceutical formulations with no significant interference from excipients. The results were found to be in good agreement with those obtained by the reference method and the claimed value. The accuracy and reliability of the method were further ascertained by recovery studies via the standard-addition method, with percentage recoveries in the range of 98.47 to 102.30%. The possible fluorescence quenching mechanism for the reaction was also discussed.
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Affiliation(s)
- Anil Hanumant Gore
- Fluorescence Spectroscopy Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur, Maharashtra, India
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Zhu K, Li J, Wang Z, Jiang H, Beier RC, Xu F, Shen J, Ding S. Simultaneous detection of multiple chemical residues in milk using broad-specificity antibodies in a hybrid immunosorbent assay. Biosens Bioelectron 2011; 26:2716-9. [DOI: 10.1016/j.bios.2010.09.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 09/06/2010] [Accepted: 09/06/2010] [Indexed: 10/19/2022]
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Dong W, Shen HB, Liu XH, Li MJ, Li LS. CdSe/ZnS quantum dots based fluorescence quenching method for determination of paeonol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:537-542. [PMID: 21147020 DOI: 10.1016/j.saa.2010.11.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 11/17/2010] [Accepted: 11/18/2010] [Indexed: 05/30/2023]
Abstract
Aqueous polymethylmethacrylate (PMMA)-capped CdSe/ZnS quantum dots were used as fluorescence probes for paeonol determination. Based on the fluorescence quenching of aqueous CdSe/ZnS quantum dots caused by paeonol, a simple, sensitive and rapid method was developed. Under the optimal conditions, with excitation and emission wavelengths at 350 nm and 620 nm, respectively, the calibration plot of F0-F with concentration of paeonol was linear in the range of 25.04-175.2 mg L(-1) with correlation coefficient of 0.9986. The limit of detection was 0.017 mg L(-1). The concentration of paeonol in paeonol ointment was determined by the proposed method and the result agreed with the claimed value. Furthermore, the possible fluorescence quenching mechanism was discussed.
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Affiliation(s)
- Wei Dong
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
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Wei L, Li G, Li H. Study on the enhanced fluorescent spectrum of ciprofloxacin+Al(III)+La(III)+cetyltrimethylammonium bromide system and its application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:1486-1491. [PMID: 20202893 DOI: 10.1016/j.saa.2010.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Revised: 01/25/2010] [Accepted: 02/03/2010] [Indexed: 05/28/2023]
Abstract
The fluorescence of ciprofloxacin (CIP) in HAc-NaAc buffer solution and the presence of cetyltrimethylammonium bromide (CTMAB) enhanced visibly with adding Al(III) and La(III). This enhanced fluorescence spectra were studied, and a new co-luminescence system of CIP+Al(III)+La(III)+CTMAB was discovered. There was a linear relationship between the enhanced fluorescence intensity and the concentration of CIP in the range of 0.50-80.2microgl(-1) under the optimized condition. A novel enhanced fluorescence method for the determination of trace CIP was established by using this co-luminescence system. The detection limit of the proposed method was 0.17microgl(-1) for CIP. This method is simple, rapid and sensitive. The CIP in milk samples were analyzed by the proposed method with satisfactory results. The relative standard deviation and the recovery were in ranges of 3.21-4.34% and 97.1-100.1%, respectively. The mechanism of the co-luminescence reaction and the reasons for fluorescence enhancement has been discussed.
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Affiliation(s)
- Leilei Wei
- College of Public Health, University of South China, Hengyang 421001, PR China.
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Liao P, Yan ZY, Xu ZJ, Sun X. A novel fluorescent assay for edaravone with aqueous functional CdSe quantum dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 72:1066-1070. [PMID: 19201257 DOI: 10.1016/j.saa.2008.12.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Accepted: 12/26/2008] [Indexed: 05/27/2023]
Abstract
Aqueous thiol-capped CdSe QDs with a narrow, symmetric emission were prepared under a low temperature. Based on the fluorescence enhancement of thiol-stabilized CdSe quantum dots (QDs) caused by edaravone, a simple, rapid and specific quantitative method was proposed to the edaravone determination. The concentration dependence of fluorescence intensity followed the binding of edaravone to surface of the thiol-capped CdSe QDs was effectively described by a modified Langmuir-type binding isotherm. Factors affecting the fluorescence detection for edaravone with thiol-stabilized CdSe QDs were studied, such as the effect of pH, reaction time, the concentration of CdSe QDs and so on. Under the optimal conditions, the calibration plot of C/(I-I(0)) with concentration of edaravone was linear in the range of (1.45-17.42) microg/mL (0.008-0.1 micromol/L) with correlation coefficient of 0.998. The limit of detection (LOD) (3sigma/kappa) was 0.15 microg/mL (0.0009 micromol/mL). Possible interaction mechanism was discussed.
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Affiliation(s)
- Ping Liao
- Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, Nanjing 210009, China
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