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Montaseri Z, Tamaddon AM, Raee MJ, Farvadi F. Exploring the Effects of Various Capping Agents on Zinc Sulfide Quantum Dot Characteristics and In-vitro Fate. ChemistryOpen 2023; 12:e202300094. [PMID: 37803419 PMCID: PMC10558426 DOI: 10.1002/open.202300094] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/29/2023] [Indexed: 10/08/2023] Open
Abstract
The choice of capping agents used during the synthesis process of quantum dots (QDs) can significantly influence their fate and fundamental properties. Hence, choosing an appropriate capping agent is a critical step in both synthesis and biomedical application of QDs. In this research, ZnS QDs were synthesized via chemical precipitation process and three commonly employed capping agents, namely mercaptoethanol (ME), mercaptoacetic acid (MAA), and cysteamine (CA), were used to stabilize the QDs. This study was aimed to examine how these capping agents impact the physicochemical and optical characteristics of ZnS QDs, as well as their interactions with biological systems. The findings revealed that the capping agents had considerable effects on the behavior and properties of ZnS QDs. MAA-QD exhibited superior crystal lattice, smaller size, and significant quantum yield (QY). In contrast, CA-QDs demonstrated the lowest QY and the highest tendency for aggregation. ME-QDs exhibited intermediate characteristics, along with an acceptable level of cytotoxicity, rapid uptake by cells, and efficient escape from lysosomes. Consequently, it is advisable to select capping agents in accordance with the specific objectives of the research.
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Affiliation(s)
- Zohre Montaseri
- Center for Nanotechnology in Drug DeliveryShiraz University of Medical SciencesShirazIran
- Department of Pharmaceutical NanotechnologyShiraz University of Medical SciencesShirazIran
| | - Ali Mohammad Tamaddon
- Center for Nanotechnology in Drug DeliveryShiraz University of Medical SciencesShirazIran
- Department of Pharmaceutical NanotechnologyShiraz University of Medical SciencesShirazIran
| | - Mohammad Javad Raee
- Center for Nanotechnology in Drug DeliveryShiraz University of Medical SciencesShirazIran
| | - Fakhrossadat Farvadi
- Center for Nanotechnology in Drug DeliveryShiraz University of Medical SciencesShirazIran
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2
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Azizi B, Farhadi K, Samadi N. Functionalized carbon dots from zein biopolymer as a sensitive and selective fluorescent probe for determination of sumatriptan. Microchem J 2019. [DOI: 10.1016/j.microc.2019.02.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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3
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Baghel M, Rajput SJ. Stress degradation of edaravone: Separation, isolation and characterization of major degradation products. Biomed Chromatogr 2017; 32. [PMID: 29171029 DOI: 10.1002/bmc.4146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 11/01/2017] [Accepted: 11/10/2017] [Indexed: 12/13/2022]
Abstract
In the present study the International Conference on Harmonization-prescribed stress degradation was carried out to study the degradation profile of edaravone. To establish a Quality by Design (QbD)-assisted stability-indicating assay, the reaction solutions in which different degradation products were formed were mixed. Plackett Burman and central composite design were used to screen and optimize experimental variables to resolve edaravone and its impurities with good peak symmetry using an RP C18 column. The method was validated according to International Conference on Harmonization guidelines. Seven unknown and two known degradation products were identified and characterized by LC-MS/MS. Two major degradation products formed under thermal degradation were isolated and characterized as 4-(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl-4-(4,5-dihydro-5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one and 3-hydroxy-dihydro-thiazolo[1-(2-methyl-buta-1,3dienyl)-1-phenylhydrazine]5-one. The degradation pathways of degradants were proposed based on m/z values.
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Affiliation(s)
- Madhuri Baghel
- Centre of Relevance and Excellence in Novel Drug Delivery Systems, Faculty of Pharmacy, G.H. Patel Building, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - Sadhana J Rajput
- Centre of Relevance and Excellence in Novel Drug Delivery Systems, Faculty of Pharmacy, G.H. Patel Building, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
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4
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Photoluminescence investigation of MPA–ZnS QDs interaction with selenite ion. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1182-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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5
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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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Yan Z, Chen J, Xiao A, Shu J, Chen J. Effects of representative quantum dots on microorganisms and phytoplankton: a comparative study. RSC Adv 2015. [DOI: 10.1039/c5ra23730k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this paper, we put forward more effective and convenient approaches to prepare three kinds of high-quality CQDs. Then we assessed their effects on Staphylococcus aureus and Microcystis aeruginosa.
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Affiliation(s)
- Zhengyu Yan
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
| | - Jiao Chen
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
| | - An Xiao
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
| | - Juan Shu
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
| | - Jianqiu Chen
- School of Science
- Key Laboratory of Drug Quality Control and Pharmacovigilance
- Ministry of Education
- China Pharmaceutical University
- Nanjing
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7
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A fluorescent probe for detecting thiamine using the luminescence intensity of nanoparticles. J Fluoresc 2014; 24:1025-30. [PMID: 24737227 DOI: 10.1007/s10895-014-1377-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 03/19/2014] [Indexed: 12/12/2022]
Abstract
Determination of molecules and biomolecules using nanoparticles is promising in the development of analytical techniques. Modified Eu-doped Y2O3 nanoparticles (Y2O3:Eu NPs) by captopril have been used as a probe for thiamine (vitamin B1) determination. According to the fluorescence enhancement of modified Eu-doped Y2O3 nanoparticles caused by thiamine, a simple and sensitive method were proposed for its detection. The increase in modified Y2O3:Eu NPs fluorescence signal as a function of thiamine concentration was found to be linear in the concentration range of 0-44 μM. The limit of detection (LOD) of thiamine by this method was 0.144 μM. All the measurements were performed in natural pH, at the room temperature under ambient conditions. Possible interaction mechanism was discussed.
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Shamsipur M, Rajabi HR. Pure zinc sulfide quantum dot as highly selective luminescent probe for determination of hazardous cyanide ion. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 36:139-45. [DOI: 10.1016/j.msec.2013.12.001] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 11/16/2013] [Accepted: 12/02/2013] [Indexed: 10/25/2022]
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Torabi B, Shemirani F. A new approach to highly sensitive determination of retinoic acid isomers by preconcentration with CdSe quantum dots. Talanta 2014; 120:34-9. [PMID: 24468339 DOI: 10.1016/j.talanta.2013.11.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 11/12/2013] [Accepted: 11/13/2013] [Indexed: 11/24/2022]
Abstract
Unusual amounts of retinoic acid (RA) isomers play an important role in abnormal morphological development of mammals; such as rat embryos. Each isomer of RA has a unique function in first steps of embryonic life. In the current study, a new method for preconcentration and simultaneous determination of all-trans retinoic acid, 13-cis retinoic acid, 9-cis retinoic acid and 9,13-di-cis retinoic acid in rat whole rudimentary embryo culture (RWEC) has been developed. RA isomers were extracted from samples by conjugation to appropriate amount of surface modified CdSe quantum dots (QDs) prior to HPLC/UV determination. In order to quickly release of the analytes with unchanged form, separated RA-QD conjugation were irradiated by intensive near infrared wavelength (NIR). Low energy NIR irradiation results in maintaining the primary forms of RA isomers during the release. The conjugation and release mechanisms were described and experimental parameters were investigated in detail. Under optimized conditions, the method was linear in the range of 0.040-34.600 pmol g(-1) for all-trans RA (R(2)=0.9996), 0.070-34.200 pmol g(-1) for 13-cis RA (R(2)=0.9992), 0.050-35.300 pmol g(-1) for 9,13-di-cis RA (R(2)=0.9998) and 0.050-32.900 pmol g(-1) for 9-cis RA (R(2)=0.9990). The present method can be useful for retinoic acid monitoring in clinical studies.
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Affiliation(s)
- Behzad Torabi
- Department of Analytical Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran
| | - Farzaneh Shemirani
- Department of Analytical Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.
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10
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Yu YY, Zheng XX, Bian TT, Li YJ, Wu XW, Yang DZ, Jiang SS, Tang DQ. Development and application of a LC-MS/MS assay for the simultaneous quantification of edaravone and taurine in beagle plasma. J Sep Sci 2013; 36:3837-44. [DOI: 10.1002/jssc.201300983] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Revised: 09/30/2013] [Accepted: 10/02/2013] [Indexed: 12/31/2022]
Affiliation(s)
- Yan-yan Yu
- Department of Pharmaceutical Analysis; Xuzhou Medical College; Xuzhou Jiangsu China
- Key Laboratory of New Drug and Clinical Application; Xuzhou Medical College; Xuzhou Jiangsu China
| | - Xiao-xiao Zheng
- Key Laboratory of New Drug and Clinical Application; Xuzhou Medical College; Xuzhou Jiangsu China
| | - Ting-ting Bian
- Key Laboratory of New Drug and Clinical Application; Xuzhou Medical College; Xuzhou Jiangsu China
| | - Yin-jie Li
- Key Laboratory of New Drug and Clinical Application; Xuzhou Medical College; Xuzhou Jiangsu China
| | - Xiao-wen Wu
- Key Laboratory of New Drug and Clinical Application; Xuzhou Medical College; Xuzhou Jiangsu China
| | - Dong-zhi Yang
- Department of Pharmaceutical Analysis; Xuzhou Medical College; Xuzhou Jiangsu China
- Key Laboratory of New Drug and Clinical Application; Xuzhou Medical College; Xuzhou Jiangsu China
| | - Shui-shi Jiang
- Nanjing Yoko Pharmaceutical Co. Ltd; Nanjing Jiangsu China
| | - Dao-quan Tang
- Department of Pharmaceutical Analysis; Xuzhou Medical College; Xuzhou Jiangsu China
- Key Laboratory of New Drug and Clinical Application; Xuzhou Medical College; Xuzhou Jiangsu China
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11
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Wu D, Chen Z. ZnS quantum dots-based fluorescence spectroscopic technique for the detection of quercetin. LUMINESCENCE 2013; 29:307-13. [DOI: 10.1002/bio.2545] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 04/28/2013] [Accepted: 05/07/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Dudu Wu
- School of Pharmacy; Guangdong Medical College; Dongguan 523808 People's Republic of China
| | - Zhi Chen
- Center of Analysis; Guangdong Medical College; Dongguan 523808 People's Republic of China
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12
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Rajabi HR, Shamsipur M, Khosravi AA, Khani O, Yousefi MH. Selective spectrofluorimetric determination of sulfide ion using manganese doped ZnS quantum dots as luminescent probe. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 107:256-262. [PMID: 23434552 DOI: 10.1016/j.saa.2013.01.045] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2012] [Revised: 01/11/2013] [Accepted: 01/17/2013] [Indexed: 06/01/2023]
Abstract
This work reports a spectrofluorimetric method for selective and sensitive determination of sulfide ion in aqueous solution. The ultra-small zinc sulfide quantum dots (QDs) doped with manganese (ZnS:Mn) were synthesized by using a simple and fast procedure based on the co-precipitation of nanoparticles in aqueous solution in the presence of 2-mercaptoethanol, as capping agent. The nanoparticles have exhibited two strong fluorescent emissions at about 424 and 594 nm. Luminescent surface-capped ZnS:Mn QDs, with particle size below 5 nm, have been applied for determination of sulfide anions in water samples. Under the optimum conditions, the fluorescence intensity of ZnS:Mn QDs is linearly proportional to the sulfide ion concentration in the range 1.2×10(-6) to 2.6×10(-5) mol L(-1) with a detection limit as 3.3×10(-7) mol L(-1). The relative standard deviation for five replicate measurements (for 8.0×10(-6) mol L(-1) of S(2-)) was obtained to be 2.6%. It was founded that the interference of the other anions was negligible on the quantitive determination of sulfide ion.
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13
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Photoactivation by visible light of CdTe quantum dots for inline generation of reactive oxygen species in an automated multipumping flow system. Anal Chim Acta 2012; 735:69-75. [DOI: 10.1016/j.aca.2012.05.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 05/17/2012] [Accepted: 05/18/2012] [Indexed: 11/18/2022]
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14
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Freeman R, Willner I. Optical molecular sensing with semiconductor quantum dots (QDs). Chem Soc Rev 2012; 41:4067-85. [DOI: 10.1039/c2cs15357b] [Citation(s) in RCA: 393] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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15
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Bardhan M, Misra T, Ganguly T. Quantization of bovine serum albumin by fluorescence enhancement effects and corresponding binding of macrocyclic host-protein assembly. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2011; 106:113-9. [PMID: 22115956 DOI: 10.1016/j.jphotobiol.2011.10.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 10/15/2011] [Accepted: 10/27/2011] [Indexed: 11/17/2022]
Abstract
The present paper reports the investigations on the spectroscopic behavior of the binary complexes of the dye aurintricarboxylic acid (ATA) with protein bovine serum albumin (BSA) and 18-crown 6 (CW) (ATA·BSA, ATA·CW) and the ternary complex ATA·CW·BSA by using UV-vis steady state and time resolved fluorescence spectroscopy. The primary aim of the work is to determine the protein (BSA) quantization by fluorescence enhancement method and investigate the 'enhancer' activity of crown ether (CW) on it to increase the resolution. Steady state and time resolved fluorescence measurements demonstrated how fluorescence intensity of ATA could be used for the determination of the protein BSA in aqueous solution. The binding of dye (probe/fluorescent medicinal molecule) with protein and the denaturing effect in the polar environment of acetonitrile of the dye protein complex act as drug binding as well as drug release activity. Apart from its basic research point of view, the present study also possesses significant importance and applications in the field of medicinal chemistry.
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Affiliation(s)
- Munmun Bardhan
- Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, West Bengal, India
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Wang Y, Yang H, Xia Z, Tong Z, Zhou L. One-Pot Synthesis of CdSe Quantum Dots Using Selenium Dioxide as a Selenium Source in Aqueous Solution. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.7.2316] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Effects of Metallic Ions on Photoluminescence Properties of CdSe/PAMAM Nanocomposites and their Application in Fingerprint Detection. ACTA ACUST UNITED AC 2011. [DOI: 10.4028/www.scientific.net/amr.295-297.900] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uniform and well-dispersed photoluminescent semiconductor CdSe(Cadmium selenium) QDs(Quantum dots) werein-situprepared stabilized by G4.0-NH2PAMAM dendrimers in water and effects of metallic ions such as Zn2+, Cd2+, Cu2+, Ag+, Pb2+, K+, Na+on the photoluminescence(PL) properties of CdSe QDs were studied using spectrophotometric titration. The results show that Zn2+and Cd2+ions enhance the PL intensity of CdSe QDs, Cu2+, Ag+and Pb2+ions quench the PL intensity, while K+and Na+ions have no obvious effects. Those are attributed to the surface modification of CdSe QDs. Excess Cd2+ions can reduce the non-combination centers, increase the passivation of PAMAM on the surface of CdSe QDs, and form a Schottky-like barrier which enhanced the PL efficiency. Excess Zn2+ions can also increase the PL intensity of CdSe QDs in the same way as Cd2+ions because of the much similar lattice parameters of CdSe and ZnSe. However, a CuSe, Ag2Se or PbSe shell on CdSe QDs emerges due to the substitution of Cd2+ions, which leads to the decrease of band-edge emmiting of CdSe QDs. And the quenching effect of Ag+is stonger than Cu2+and Pb2+because of the lower solubility of Ag2Se formed on the surface of CdSe QDs. Oil latent fingerprints deposited on tinfoil surface treated with CdSe/dendrimer NCs(Nanocomposites)、Cd2+-CdSe/ PAMAM NCs and Zn2+-CdSe /PAMAM NCs emitted bright yellow photoluminescence under ultraviolet excitation of 365nm from an UV LED in the dark., among, fingerprint treated with Cd2+-CdSe/dendrimer NCs and Zn2+-CdSe /PAMAM NCs was detected with better resolving rate.
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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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Tang CR, Su ZH, Lin BG, Huang HW, Zeng YL, Li S, Huang H, Wang YJ, Li CX, Shen GL, Yu RQ. A novel method for iodate determination using cadmium sulfide quantum dots as fluorescence probes. Anal Chim Acta 2010; 678:203-7. [DOI: 10.1016/j.aca.2010.08.034] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 08/24/2010] [Accepted: 08/26/2010] [Indexed: 12/01/2022]
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20
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Citrate-stabilized CdSe/CdS quantum dots as fluorescence probe for protein determination. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s11771-010-0546-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Ogawa T, Aoyagi S, Miyasaka T, Sakai K. Fluorescence enhancement of fluorescein isothiocyanate-labeled protein a caused by affinity binding with immunoglobulin g in bovine plasma. SENSORS 2009; 9:8271-7. [PMID: 22408505 PMCID: PMC3292107 DOI: 10.3390/s91008271] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2009] [Revised: 09/29/2009] [Accepted: 10/15/2009] [Indexed: 01/12/2023]
Abstract
Fluorescence enhancement of fluorescein isothiocyanate-labeled protein A (FITC-protein A) caused by the binding with immunoglobulin G (IgG) in bovine plasma was studied. FITC-protein A was immobilized onto a glass surface by covalent bonds. An increase in fluorescence intensity was dependent on IgG concentration ranging from 20 to 78 μg/mL in both phosphate buffer saline and bovine plasma. This method requires no separation procedure, and the reaction time is less than 15 min. A fluorescence enhancement assay by the affinity binding of fluorescence-labeled reagent is thus available for the rapid determination of biomolecules in plasma.
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Affiliation(s)
- Takehito Ogawa
- Department of Chemical Engineering, Waseda University / 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan; E-Mail: (T.O.)
| | - Satoka Aoyagi
- Faculty of Life and Environmental Science, Shimane University / 1060 Nishikawatsu-cho, Matsue-shi, Shimane 690-8504, Japan; E-Mail: (S.A.)
| | - Takehiro Miyasaka
- Department of Medical Engineering, Himeji Dokkyo University / 7-2-1 Kamiono, Himeji-shi, Hyogo 670-8524, Japan; E-Mail: (T.M.)
| | - Kiyotaka Sakai
- Department of Chemical Engineering, Waseda University / 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan; E-Mail: (T.O.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +81-3-5286-3216; Fax: +81-3-3209-7957
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