1
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Fluorescence and Naked-Eye Detection of Pb2+ in Drinking Water Using a Low-Cost Ionophore Based Sensing Scheme. CHEMOSENSORS 2018. [DOI: 10.3390/chemosensors6040051] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Drinking water contamination of lead from various environmental sources, leaching consumer products, and intrinsic water-pipe infrastructure is still today a matter of great concern. Therefore, new highly sensitive and convenient Pb2+ measurement schemes are necessary, especially for in-situ measurements at a low cost. Within this work dye/ionophore/Pb2+ co-extraction and effective water phase de-colorization was utilized for highly sensitive lead measurements and sub-ppb naked-eye detection. A low-cost ionophore Benzo-18-Crown-6-ether was used, and a simple test-tube mix and separate procedure was developed. Instrumental detection limits were in the low ppt region (LOD = 3, LOQ = 10), and naked-eye detection was 500 ppt. Note, however, that this sensing scheme still has improvement potential as concentrations of fluorophore and ionophore were not optimized. Artificial tap-water samples, leached by a standardized method, demonstrated drinking water application. Implications for this method are convenient in-situ lead ion measurements.
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2
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Graphene oxide wrapped with gold nanorods as a tag in a SERS based immunoassay for the hepatitis B surface antigen. Mikrochim Acta 2018; 185:458. [PMID: 30218157 DOI: 10.1007/s00604-018-2989-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 09/01/2018] [Indexed: 10/28/2022]
Abstract
A composite consisting of graphene oxide and gold nanorods (GO-GNRs) was designed for the trace determination of hepatitis B surface antigen (HBsAg) using surface enhanced Raman spectroscopy (SERS). GO contains numerous carboxy and hydroxy groups on its surface and therefore can serve as the substrate for decoration with GNRs and for immobilizing antibody against HBsAg. The GNRs (carrying the SERS probe 2-mercaptopyridine) exhibit high SERS activity, and this improves the sensitivity of the biosensor. The antibody on the GO-GNRs binds HBsAg with high specificity, and it results in excellent selectivity. The SERS signal (measured at 1002 cm-1) increases in the 1-1000 pg·mL-1 HBsAg concentrations range, and the limit of detection is 0.05 pg·mL-1 (at an S/N ratio of 3). The immunoassay achieves the sensitive and selective determination of HBsAg in serum and expands the potential application of GO-GNR based SERS tag in clinical research. Graphical abstract A novel graphene oxide-gold nanorod (GO-GNRs) based surface-enhanced Raman scattering (SERS) tag for immunoassay was designed. It allows for sensitive and selective determination of HBsAg in serum. The method is expected to expand the potential application in the environment, in medicine and in food analysis.
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3
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Han N, Wang W, Lu D, Wang H, Ma X, Fan X, Li F. A novel, rapid, and sensitive homogeneous sandwich detection method of Glypican-3 as a serum marker for hepatocellular carcinoma. Chem Commun (Camb) 2017; 53:12209-12212. [PMID: 29077109 DOI: 10.1039/c7cc06305a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Based on multiple interactions and fluorescence quenching, we report a novel homogeneous detection method for Glypican-3 which shows a series of significant advantages, and has great potential in the clinical diagnosis of hepatocellular carcinoma and proteoglycan detection.
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Affiliation(s)
- Naihan Han
- National Glycoengineering Research Center
- and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Jinan 250100
- P. R. China
| | - Wenshuang Wang
- National Glycoengineering Research Center
- and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Jinan 250100
- P. R. China
| | - Danrong Lu
- National Glycoengineering Research Center
- and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Jinan 250100
- P. R. China
| | - Han Wang
- National Glycoengineering Research Center
- and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Jinan 250100
- P. R. China
| | - Xinying Ma
- Department of Chemistry and Chemical Engineering
- Heze University
- Heze 274015
- P. R. China
| | - Xiaopeng Fan
- Department of Hepatology
- Qilu Hospital
- Shandong University
- Jinan 250100
- P. R. China
| | - Fuchuan Li
- National Glycoengineering Research Center
- and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Jinan 250100
- P. R. China
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4
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Graphitic carbon nitride nanodots: As reductant for the synthesis of silver nanoparticles and its biothiols biosensing application. Biosens Bioelectron 2016; 89:411-416. [PMID: 27241178 DOI: 10.1016/j.bios.2016.05.064] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 05/20/2016] [Accepted: 05/21/2016] [Indexed: 12/31/2022]
Abstract
The graphitic carbon nitride nanodots (g-C3N4-dots) were synthesized by a simple electrochemical "tailoring" process from bulk graphitic carbon nitride (g-C3N4) under alkaline solution for the first time. Compared with the bulk g-C3N4, the novel g-C3N4-dots not only exhibit enhanced fluorescence and excellent dispersion stability in water but also show the reducibility for the reduction of Ag+ to AgNPs at 60°C. The biothiols can bound with Ag+ through formation of biothiol-Ag+ complex to consume the Ag+ and act as capping agent to prevent the growth of AgNPs, which cause the decrease of the absorption peak of the AgNPs. Therefore, an optical sensor was developed for the detection of biothiols based on the change of the plasmon resonance absorption peak of the AgNPs. The proposed method exhibits excellent sensitivity and selectivity to biothiols with low detection limit for cysteine (Cys), homocysteine (Hcy), and glutathione (GSH) with 11.5, 16.1, and 15.5nM, respectively. This method also has been successfully applied for the detection of biothiols in human serum with satisfactory results.
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Pal S, Lohar S, Mukherjee M, Chattopadhyay P, Dhara K. A fluorescent probe for the selective detection of creatinine in aqueous buffer applicable to human blood serum. Chem Commun (Camb) 2016; 52:13706-13709. [DOI: 10.1039/c6cc07291g] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A naphthalimide-based fluorescence light-up probe detects creatinine selectively in PBS buffer of pH 7.2 at 37 °C. It exhibits a ‘turn-on’ response to creatinine over a variety of biologically relevant ions and species and can also detect creatinine in human blood serum.
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Affiliation(s)
- Siddhartha Pal
- Department of Chemistry
- The University of Burdwan
- Burdwan 713104
- India
| | - Somenath Lohar
- Department of Chemistry
- The University of Burdwan
- Burdwan 713104
- India
| | | | | | - Koushik Dhara
- Department of Chemistry
- SambhuNath College
- Birbhum 731303
- India
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6
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Wang L, Yang L, Li L, Cao D. The synthesis and highly sensitive detection of water content in THF using a novel solvatochromic AIE polymer containing diketopyrrolopyrrole and triphenylamine. NEW J CHEM 2016. [DOI: 10.1039/c6nj00192k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The polymerN1with solvatochromism and AIE features functions as a qualitative and quantitative probe for low-level water content in THF.
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Affiliation(s)
- Lingyun Wang
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou
- China
| | - Lingling Yang
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou
- China
| | - Lin Li
- School of Food Science and Engineering
- South China University of Technology
- Guangzhou
- China
| | - Derong Cao
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Luminescent Materials and Devices
- South China University of Technology
- Guangzhou
- China
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7
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Santner J, Larsen M, Kreuzeder A, Glud RN. Two decades of chemical imaging of solutes in sediments and soils--a review. Anal Chim Acta 2015; 878:9-42. [PMID: 26002324 DOI: 10.1016/j.aca.2015.02.006] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 02/03/2015] [Accepted: 02/05/2015] [Indexed: 01/08/2023]
Abstract
The increasing appreciation of the small-scale (sub-mm) heterogeneity of biogeochemical processes in sediments, wetlands and soils has led to the development of several methods for high-resolution two-dimensional imaging of solute distribution in porewaters. Over the past decades, localised sampling of solutes (diffusive equilibration in thin films, diffusive gradients in thin films) followed by planar luminescent sensors (planar optodes) have been used as analytical tools for studies on solute distribution and dynamics. These approaches have provided new conceptual and quantitative understanding of biogeochemical processes regulating the distribution of key elements and solutes including O2, CO2, pH, redox conditions as well as nutrient and contaminant ion species in structurally complex soils and sediments. Recently these methods have been applied in parallel or integrated as so-called sandwich sensors for multianalyte measurements. Here we review the capabilities and limitations of the chemical imaging methods that are currently at hand, using a number of case studies, and provide an outlook on potential future developments for two-dimensional solute imaging in soils and sediments.
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Affiliation(s)
- Jakob Santner
- Rhizosphere Ecology and Biogeochemistry Group, Department of Forest and Soil Sciences, Institute of Soil Research, University of Natural Resources and Life Sciences Vienna, Konrad Lorenz-Strasse 24, 3430 Tulln, Austria.
| | - Morten Larsen
- Nordic Center for Earth Evolution (NordCEE), University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
| | - Andreas Kreuzeder
- Rhizosphere Ecology and Biogeochemistry Group, Department of Forest and Soil Sciences, Institute of Soil Research, University of Natural Resources and Life Sciences Vienna, Konrad Lorenz-Strasse 24, 3430 Tulln, Austria
| | - Ronnie N Glud
- Nordic Center for Earth Evolution (NordCEE), University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark; Scottish Marine Institute, Scottish Association for Marine Science, Oban, Scotland, PA37 1QA, UK; Greenland Climate Research Centre (CO Greenland Institute of Natural Resources), Kivioq 2, Box 570, 3900 Nuuk, Greenland; Arctic Research Centre, Aarhus University, 8000 Aarhus, Denmark
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8
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Lu Q, Liu Y, Hou Y, Wang H, Zhang Y, Yao S. Detection of thiocyanate through limiting growth of AuNPs with C-dots acting as reductant. Analyst 2015; 140:7645-9. [DOI: 10.1039/c5an01605c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have found that hydroxyl-rich carbon dots (C-dots) have the ability to reduce Au3+to form gold nanoparticles (AuNPs) which can be used as an optical sensor to detect SCN−in raw milk with satisfactory results.
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Affiliation(s)
- Qiujun Lu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Yalan Liu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Yuxin Hou
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Haiyan Wang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Youyu Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Shouzhuo Yao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
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9
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Hu XX, Su YT, Ma YW, Zhan XQ, Zheng H, Jiang YB. A near infrared colorimetric and fluorometric probe for organophosphorus nerve agent mimics by intramolecular amidation. Chem Commun (Camb) 2015; 51:15118-21. [DOI: 10.1039/c5cc04630k] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A carboxylic acid group was activated by nerve agent mimics to conduct intramolecular amidation in heptamethine chromophore, leading to large red-shifts of both absorption and excitation wavelengths in the near infrared region.
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Affiliation(s)
- Xiao-Xiao Hu
- Department of Chemistry
- College of Chemistry and Chemical Engineering, and the MOE Key Laboratory of Physical Laboratory of Spectrochemical Analysis & Instrumentation
- Xiamen University
- Xiamen
- China
| | - Yue-Ting Su
- Department of Chemistry
- College of Chemistry and Chemical Engineering, and the MOE Key Laboratory of Physical Laboratory of Spectrochemical Analysis & Instrumentation
- Xiamen University
- Xiamen
- China
| | - Yun-Wei Ma
- Department of Chemistry
- College of Chemistry and Chemical Engineering, and the MOE Key Laboratory of Physical Laboratory of Spectrochemical Analysis & Instrumentation
- Xiamen University
- Xiamen
- China
| | - Xin-Qi Zhan
- Basic Medicine Department
- Medical College of Xiamen University
- Xiamen
- China
| | - Hong Zheng
- Department of Chemistry
- College of Chemistry and Chemical Engineering, and the MOE Key Laboratory of Physical Laboratory of Spectrochemical Analysis & Instrumentation
- Xiamen University
- Xiamen
- China
| | - Yun-Bao Jiang
- Department of Chemistry
- College of Chemistry and Chemical Engineering, and the MOE Key Laboratory of Physical Laboratory of Spectrochemical Analysis & Instrumentation
- Xiamen University
- Xiamen
- China
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10
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Lu Q, Zhao J, Xue S, Yin P, Zhang Y, Yao S. A “turn-on” fluorescent sensor for ultrasensitive detection of melamine based on a new fluorescence probe and AuNPs. Analyst 2015; 140:1155-60. [DOI: 10.1039/c4an01847h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new fluorescence sensor for melamine was fabricated by combining a new fluorescent probe 7-(benzylamino)-9,9-dibutyl-9H-fluorene-2-carbaldehyde and AuNPs. This nanosensor has been applied to the determination of melamine in milk samples with satisfactory results.
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Affiliation(s)
- Qiujun Lu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Jiangna Zhao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Shanyan Xue
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Peng Yin
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Youyu Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
| | - Shouzhuo Yao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education)
- College of Chemistry and Chemical Engineering
- Hunan Normal University
- Changsha 410081
- PR China
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11
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Hakonen A, Beves JE, Strömberg N. Digital colour tone for fluorescence sensing: a direct comparison of intensity, ratiometric and hue based quantification. Analyst 2014; 139:3524-7. [DOI: 10.1039/c4an00063c] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Standard digital cameras combined with hue-parameter photoscopy demonstrate simple yet superior and high-performance quantitative fluorescence sensing and imaging of pH.
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Affiliation(s)
- Aron Hakonen
- Department of Applied Physics
- Chalmers University of Technology
- Gothenburg, Sweden
| | | | - Niklas Strömberg
- SP Technical Research Institute of Sweden
- Chemistry, Materials and Surfaces
- SE-501 15 Borås, Sweden
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12
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Kartha KK, Sandeep A, Nair VC, Takeuchi M, Ajayaghosh A. A carbazole–fluorene molecular hybrid for quantitative detection of TNT using a combined fluorescence and quartz crystal microbalance method. Phys Chem Chem Phys 2014; 16:18896-901. [DOI: 10.1039/c4cp03050h] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-assembled fluorescent rods and nanoparticles prepared from a carbazole–fluorene molecular hybrid have been used for the sensing of TNT.
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Affiliation(s)
- Kalathil K. Kartha
- Photosciences and Photonics Group
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Trivandrum 695 019, India
| | - Anjamkudy Sandeep
- Photosciences and Photonics Group
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Trivandrum 695 019, India
| | - Vijayakumar C. Nair
- Photosciences and Photonics Group
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Trivandrum 695 019, India
| | - Masayuki Takeuchi
- Organic Materials Group
- Polymer Materials Unit
- National Institute for Materials Science (NIMS)
- Tsukuba 305-0047, Japan
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Group
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Trivandrum 695 019, India
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13
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Jang YJ, Tsay OG, Murale DP, Jeong JA, Segev A, Churchill DG. Novel and selective detection of Tabun mimics. Chem Commun (Camb) 2014; 50:7531-4. [DOI: 10.1039/c4cc02689f] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Detection of nerve agent-related molecules based on BODIPY–salicylaldehyde oxime conjugation was studied.
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Affiliation(s)
- Yoon Jeong Jang
- Molecular Logic Gate Laboratory
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon, Republic of Korea
| | - Olga G. Tsay
- Molecular Logic Gate Laboratory
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon, Republic of Korea
| | - Dhiraj P. Murale
- Molecular Logic Gate Laboratory
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon, Republic of Korea
| | - Jeong A. Jeong
- Molecular Logic Gate Laboratory
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon, Republic of Korea
| | - Aviv Segev
- Department of Knowledge Service Engineering – Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon, Republic of Korea
| | - David G. Churchill
- Molecular Logic Gate Laboratory
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon, Republic of Korea
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14
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Fluorescence ratiometric properties induced by nanoparticle plasmonics and nanoscale dye dynamics. ScientificWorldJournal 2013; 2013:624505. [PMID: 23781159 PMCID: PMC3678464 DOI: 10.1155/2013/624505] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Accepted: 05/09/2013] [Indexed: 02/04/2023] Open
Abstract
Nanoscale transport of merocyanine 540 within/near the plasmon field of gold nanoparticles was recognized as an effective inducer of single-excitation dual-emission ratiometric properties. With a high concentration of the signal transducer (ammonium), a 700% increase in fluorescence was observed at the new red-shifted emission maximum, compared to a nanoparticle free sensor membrane. A previously nonrecognized isosbestic point is demonstrated at 581.4 ± 0.1 nm. The mechanism can be utilized for enhanced and simplified ratiometric optical chemical sensors and potentially for thin film engineering to make solar cells more effective and stable by a broader and more regulated absorption.
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15
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Facile preparation of glutathione-stabilized gold nanoclusters for selective determination of chromium (III) and chromium (VI) in environmental water samples. Anal Chim Acta 2013; 770:140-6. [PMID: 23498696 DOI: 10.1016/j.aca.2013.01.042] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 01/14/2013] [Accepted: 01/20/2013] [Indexed: 11/22/2022]
Abstract
A novel method for selective determination of Cr(III) and Cr(VI) in environmental water samples was developed based on target-induced fluorescence quenching of glutathione-stabilized gold nanoclusters (GSH-Au NCs). Fluorescent GSH-Au NCs were synthesized by a one-step approach employing GSH as reducing/protecting reagent. It was found that Cr(III) and Cr(VI) showed pH-dependent fluorescence quenching capabilities for GSH-Au NCs, and thus selective determination of Cr(III) and Cr(VI) could be achieved at different pHs. Addition of EDTA was able to effectively eliminate the interferences from other metal ions, leading to a good selectivity for this method. Under optimized conditions, Cr(III) showed a linear range of 25-3800 μg L(-1) and a limit of detection (LOD) of 2.5 μg L(-1). The Cr(VI) ion demonstrated a linear range of 5-500 μg L(-1) and LOD of 0.5 μg L(-1). The run-to-run relative standard deviations (n=5) for Cr(III) and Cr(VI) were 3.9% and 2.8%, respectively. The recoveries of Cr(III) and Cr(VI) in environmental water samples were also satisfactory (76.3-116%). This method, with its simplicity, low cost, high selectivity and sensitivity, could be used as a promising tool for chromium analysis in environmental water samples.
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Ding L, Zhang Z, Li X, Su J. Highly sensitive determination of low-level water content in organic solvents using novel solvatochromic dyes based on thioxanthone. Chem Commun (Camb) 2013; 49:7319-21. [DOI: 10.1039/c3cc43608j] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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17
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Hong X, Wang Z, Yang J, Zheng Q, Zong S, Sheng Y, Zhu D, Tang C, Cui Y. Silylated BODIPY dyes and their use in dye-encapsulated silica nanoparticles with switchable emitting wavelengths for cellular imaging. Analyst 2012; 137:4140-9. [DOI: 10.1039/c2an35389j] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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18
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Kumar R, Kumar S, Singh P, Hundal G, Hundal MS, Kumar S. A fluorescent chemosensor for detection of perchlorate ions in water. Analyst 2012; 137:4913-6. [DOI: 10.1039/c2an35901d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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19
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Ruedas-Rama MJ, Orte A, Hall EAH, Alvarez-Pez JM, Talavera EM. A chloride ion nanosensor for time-resolved fluorimetry and fluorescence lifetime imaging. Analyst 2012; 137:1500-8. [DOI: 10.1039/c2an15851e] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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