101
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Kim H, Na YJ, Song EJ, Kim KB, Bae JM, Kim C. A single colorimetric sensor for multiple target ions: the simultaneous detection of Fe2+ and Cu2+ in aqueous media. RSC Adv 2014. [DOI: 10.1039/c4ra02776k] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The receptor 1 provides a novel approach for the simultaneous colorimetric recognition of two metal ions Fe2+ and Cu2+.
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Affiliation(s)
- Hyun Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Yu Jeong Na
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Eun Joo Song
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Kyung Beom Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Jeong Mi Bae
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Cheal Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
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102
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Venkateswarulu M, Mukherjee T, Mukherjee S, Koner RR. Turn-on trivalent cation selective chemodosimetric probe to image native cellular iron pools. Dalton Trans 2014; 43:5269-73. [DOI: 10.1039/c3dt53141d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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103
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Zhang K, Yang L, Zhu H, Ma F, Zhang Z, Wang S. Selective visual detection of trace trinitrotoluene residues based on dual-color fluorescence of graphene oxide–nanocrystals hybrid probe. Analyst 2014; 139:2379-85. [DOI: 10.1039/c3an02380j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dual-color fluorescence nanohybrid probe comprising blue emissive fluorescent graphene oxide and red emissive nanocrystals has been developed for the visual detection of TNT residues in solution and on various surfaces.
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Affiliation(s)
- Kui Zhang
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei, China
| | - Lei Yang
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei, China
| | - Houjuan Zhu
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei, China
| | - Fang Ma
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei, China
| | - Zhongping Zhang
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei, China
| | - Suhua Wang
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei, China
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104
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Kaur K, Kaur M, Kaur A, Singh J, Singh N, Mittal SK, Kaur N. Polymer-based biocompatible fluorescent sensor for nano-molar detection of Zn2+ in aqueous medium and biological samples. Inorg Chem Front 2014. [DOI: 10.1039/c3qi00031a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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105
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Mukherjee M, Pal S, Sen B, Lohar S, Banerjee S, Banerjee S, Chattopadhyay P. Substituent effect on fluorescence signaling of the cell permeable HSO4− receptors through single point to ratiometric response in green solvent. RSC Adv 2014. [DOI: 10.1039/c4ra03551h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Effect of substituents on tuning of fluorescence signaling of the cell permeable HSO4− ions receptors through single point to ratiometric response in green solvent was systematically explored through analytical and biological studies.
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Affiliation(s)
| | - Siddhartha Pal
- Department of Chemistry
- Burdwan University
- Burdwan-713104, India
| | - Buddhadeb Sen
- Department of Chemistry
- Burdwan University
- Burdwan-713104, India
| | - Somenath Lohar
- Department of Chemistry
- Burdwan University
- Burdwan-713104, India
| | - Samya Banerjee
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore, India
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106
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Sen B, Mukherjee M, Pal S, Dhara K, Mandal SK, Khuda-Bukhsh AR, Chattopadhyay P. A water soluble FRET-based ratiometric chemosensor for Hg(ii) and S2−applicable in living cell staining. RSC Adv 2014. [DOI: 10.1039/c3ra47800a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new water soluble rhodamine-based ratiometric dual ‘off–on–off’ probe can selectively detect Hg2+ions in ppb level through time dependent FRET process with reversibility in presence of S2−anions.
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Affiliation(s)
- Buddhadeb Sen
- Department of Chemistry
- The University of Burdwan
- Burdwan 713104, India
| | - Manjira Mukherjee
- Department of Chemistry
- The University of Burdwan
- Burdwan 713104, India
| | - Siddhartha Pal
- Department of Chemistry
- The University of Burdwan
- Burdwan 713104, India
| | - Koushik Dhara
- Department of Chemistry
- Sambhu Nath College
- Birbhum 731303, India
| | - Sushil Kumar Mandal
- Molecular Biology and Genetics Laboratory
- Department of Zoology
- Kalyani University
- India
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107
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Sen B, Mukherjee M, Pal S, Mandal SK, Hundal MS, Khuda-Bukhsh AR, Chattopadhyay P. Development of a cell permeable ratiometric chemosensor and biomarker for hydrogen sulphate ions in aqueous solution. RSC Adv 2014. [DOI: 10.1039/c4ra00291a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
A newly designed benzimidazol-based water soluble ratiometric chemosensor selective for HSO4− ions behaves as an efficient biomarker for the detection of the distribution of HSO4− ions in living cells in HEPES buffer (1 mM; water : ethanol (v/v), 98 : 2).
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Affiliation(s)
- Buddhadeb Sen
- Department of Chemistry
- The University of Burdwan
- Burdwan 713104, India
| | - Manjira Mukherjee
- Department of Chemistry
- The University of Burdwan
- Burdwan 713104, India
| | - Siddhartha Pal
- Department of Chemistry
- The University of Burdwan
- Burdwan 713104, India
| | - Sushil Kumar Mandal
- Molecular Biology and Genetics Laboratory
- Department of Zoology
- Kalyani University
- India
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108
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Fegade U, Singh A, Chaitanya GK, Singh N, Attarde S, Kuwar A. Highly selective and sensitive receptor for Fe3+ probing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 121:569-574. [PMID: 24291434 DOI: 10.1016/j.saa.2013.11.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 10/29/2013] [Accepted: 11/03/2013] [Indexed: 06/02/2023]
Abstract
A new fluorescent receptor 1,1'-(4-methylbenzene-1,3-diyl)bis[3-(2-sulfanylphenyl)urea] (1) has been designed and synthesized. The receptor showed excellent selectivity for Fe(3+) in DMSO/H2O (8:2, v/v) solvent system over other commonly coexistent metal ions. The binding constant (Ka) of receptor with Fe(3+) was calculated to be 11,250 M(-1), 12,970 M(-1) and 12,970 M(-1) using Benesi-Hildebrand, Scatchard and Connor plot, respectively. The experimental results have been further supported by the detailed DFT calculations.
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Affiliation(s)
- Umesh Fegade
- School of Chemical Sciences, North Maharashtra University, Jalgaon 425001, MS, India; School of Environmental and Earth Sciences, North Maharashtra University, Jalgaon 425001, MS, India
| | - Ajnesh Singh
- Department of Chemistry, Indian Institute of Technology, Ropar, Rupnagar 140001, Punjab, India
| | - G Krishna Chaitanya
- School of Chemical Sciences, Swami Ramanand Teerth Marathwada University, Nanded 431 606, MS, India
| | - Narinder Singh
- Department of Chemistry, Indian Institute of Technology, Ropar, Rupnagar 140001, Punjab, India
| | - Sanjay Attarde
- School of Environmental and Earth Sciences, North Maharashtra University, Jalgaon 425001, MS, India
| | - Anil Kuwar
- School of Chemical Sciences, North Maharashtra University, Jalgaon 425001, MS, India.
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109
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Hao L, Li J, Kappler A, Obst M. Mapping of heavy metal ion sorption to cell-extracellular polymeric substance-mineral aggregates by using metal-selective fluorescent probes and confocal laser scanning microscopy. Appl Environ Microbiol 2013; 79:6524-34. [PMID: 23974141 PMCID: PMC3811491 DOI: 10.1128/aem.02454-13] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Biofilms, organic matter, iron/aluminum oxides, and clay minerals bind toxic heavy metal ions and control their fate and bioavailability in the environment. The spatial relationship of metal ions to biomacromolecules such as extracellular polymeric substances (EPS) in biofilms with microbial cells and biogenic minerals is complex and occurs at the micro- and submicrometer scale. Here, we review the application of highly selective and sensitive metal fluorescent probes for confocal laser scanning microscopy (CLSM) that were originally developed for use in life sciences and propose their suitability as a powerful tool for mapping heavy metals in environmental biofilms and cell-EPS-mineral aggregates (CEMAs). The benefit of using metal fluorescent dyes in combination with CLSM imaging over other techniques such as electron microscopy is that environmental samples can be analyzed in their natural hydrated state, avoiding artifacts such as aggregation from drying that is necessary for analytical electron microscopy. In this minireview, we present data for a group of sensitive fluorescent probes highly specific for Fe(3+), Cu(2+), Zn(2+), and Hg(2+), illustrating the potential of their application in environmental science. We evaluate their application in combination with other fluorescent probes that label constituents of CEMAs such as DNA or polysaccharides and provide selection guidelines for potential combinations of fluorescent probes. Correlation analysis of spatially resolved heavy metal distributions with EPS and biogenic minerals in their natural, hydrated state will further our understanding of the behavior of metals in environmental systems since it allows for identifying bonding sites in complex, heterogeneous systems.
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Affiliation(s)
- Likai Hao
- Center for Applied Geoscience, Eberhard Karls University of Tuebingen, Tuebingen, Germany
| | - Jianli Li
- College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi, People's Republic of China
| | - Andreas Kappler
- Center for Applied Geoscience, Eberhard Karls University of Tuebingen, Tuebingen, Germany
| | - Martin Obst
- Center for Applied Geoscience, Eberhard Karls University of Tuebingen, Tuebingen, Germany
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110
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Kim H, Kim KB, Song EJ, Hwang IH, Noh JY, Kim PG, Jeong KD, Kim C. Turn-on selective fluorescent probe for trivalent cations. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.08.025] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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111
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Li X, Gao X, Shi W, Ma H. Design strategies for water-soluble small molecular chromogenic and fluorogenic probes. Chem Rev 2013; 114:590-659. [PMID: 24024656 DOI: 10.1021/cr300508p] [Citation(s) in RCA: 1185] [Impact Index Per Article: 107.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xiaohua Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
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112
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Cho J, Pradhan T, Kim JS, Kim S. Bimodal Calix[2]triazole[2]arene Fluorescent Ionophore. Org Lett 2013; 15:4058-61. [DOI: 10.1021/ol401469z] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jihee Cho
- College of Pharmacy, Seoul National University, Seoul 151-742, Korea, and Department of Chemistry, Korea University, Seoul 136-701, Korea
| | - Tuhin Pradhan
- College of Pharmacy, Seoul National University, Seoul 151-742, Korea, and Department of Chemistry, Korea University, Seoul 136-701, Korea
| | - Jong Seung Kim
- College of Pharmacy, Seoul National University, Seoul 151-742, Korea, and Department of Chemistry, Korea University, Seoul 136-701, Korea
| | - Sanghee Kim
- College of Pharmacy, Seoul National University, Seoul 151-742, Korea, and Department of Chemistry, Korea University, Seoul 136-701, Korea
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113
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Han J, Zhou Z, Bu X, Zhu S, Zhang H, Sun H, Yang B. Employing aqueous CdTe quantum dots with diversified surface functionalities to discriminate between heme (Fe(II)) and hemin (Fe(III)). Analyst 2013; 138:3402-8. [PMID: 23671901 DOI: 10.1039/c3an00310h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The discrimination of ferrous and ferric states in the human body is one of the basic issues for disease control and prevention because Fe(II) and Fe(III) are a crucial redox pair during the process of material and energy metabolism. Herein, aqueous CdTe quantum dots (QDs) with diversified surface functionalities are applied to discriminate between heme (Fe(II)) and hemin (Fe(III)) by virtue of their difference in quenching QD fluorescence. In aqueous media, the interaction between QDs and heme/hemin mainly involves electrostatic interaction, which is greatly determined by the surface functionalities of the QDs. Thus, by combining the different fluorescence quenching behavior of carboxyl- and/or hydroxyl-functionalized QDs, heme and hemin are discriminated between. In comparison to the discrimination using QDs with single surface functionality, the current method has improved reliability and accuracy.
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Affiliation(s)
- Jishu Han
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P.R. China
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114
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Tang L, Guo J, Huang Z. Tune Metal Ion Selectivity by Changing Working Solvent: Fluorescent and Colorimetric Recognition of Cu2+by a Known Hg2+Selective Probe. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.4.1061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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115
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Abstract
DNAzymes have shown great promise as a general platform for detecting metal ions, as many metal-specific DNAzymes can be obtained using in vitro selection. While DNAzyme-based metal sensors have found many applications in the extracellular environment, no intracellular application of DNAzyme sensors has yet been reported. Here, we demonstrate a novel type of metal ion sensor for intracellular metal ion detection. The probe consists of a 13 nm gold nanoparticle (AuNP) core functionalized with a shell consisting of a uranyl-specific 39E DNAzyme whose enzyme strand contains a thiol at the 3' end for conjugation to the AuNP, and whose substrate strand is modified with a Cy3 fluorophore at the 5' end and a molecular quencher at the 3' end. In the absence of uranyl, the fluorescence of the Cy3 is quenched by both AuNP and the molecular quencher. In the presence of uranyl, the DNAzyme cleaves the fluorophore-labeled substrate strand, resulting in release of the shorter product strand containing the Cy3 and increased fluorescence. We demonstrate that this DNAzyme-AuNP probe can readily enter cells and can serve as a metal ion sensor within a cellular environment, making it the first demonstration of DNAzymes as intracellular metal ion sensors. Such a method can be generally applied to the detection of other metal ions using other DNAzymes selected through in vitro selection.
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Affiliation(s)
- Peiwen Wu
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Kevin Hwang
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Tian Lan
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yi Lu
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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116
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Pathak RK, Dessingou J, Hinge VK, Thawari AG, Basu SK, Rao CP. Quinoline driven fluorescence turn on 1,3-bis-calix[4]arene conjugate-based receptor to discriminate Fe3+ from Fe2+. Anal Chem 2013; 85:3707-14. [PMID: 23441956 DOI: 10.1021/ac400059w] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The synthesis and characterization of a triazole linked quinoline appended calix[4]arene conjugate, L, and its fluorescence turn on receptor property for Fe(3+) have been demonstrated. The selective and sensitive discrimination of Fe(3+) has been shown using fluorescence and absorption titration experiments. The Fe(3+) binding to L has been further shown by ITC and ESI MS. The mode of binding of Fe(3+) by calix[4]arene conjugate has been shown by absorption, (1)H NMR and visual color change and the species were modeled based on DFT computations. The {L + Fe(3+)} has been shown to label cells with fluorescence imaging. Moreover the utility of this conjugate has been demonstrated by the combination logic gate system.
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Affiliation(s)
- Rakesh Kumar Pathak
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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117
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Jeyanthi D, Iniya M, Krishnaveni K, Chellappa D. A ratiometric fluorescent sensor for selective recognition of Al3+ ions based on a simple benzimidazole platform. RSC Adv 2013. [DOI: 10.1039/c3ra43843k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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118
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Chereddy NR, Thennarasu S, Mandal AB. A highly selective and efficient single molecular FRET based sensor for ratiometric detection of Fe3+ ions. Analyst 2013; 138:1334-7. [DOI: 10.1039/c3an36577h] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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119
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Mukherjee M, Sen B, Pal S, Hundal MS, Mandal SK, Khuda-Bukhsh AR, Chattopadhyay P. A cell permeable Cr3+ selective chemosensor and its application in living cell imaging. RSC Adv 2013. [DOI: 10.1039/c3ra43305f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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120
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Hirayama T, Okuda K, Nagasawa H. A highly selective turn-on fluorescent probe for iron(ii) to visualize labile iron in living cells. Chem Sci 2013. [DOI: 10.1039/c2sc21649c] [Citation(s) in RCA: 211] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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121
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Sen S, Mukherjee M, Chakrabarty K, Hauli I, Mukhopadhyay SK, Chattopadhyay P. Cell permeable fluorescent receptor for detection of H2PO4− in aqueous solvent. Org Biomol Chem 2013; 11:1537-44. [DOI: 10.1039/c2ob27201f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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122
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Kumar M, Kumar N, Bhalla V. Thiacalix[4]crown based optical chemosensor for Fe3+, Li+and cysteine: a Fe3+/Li+ion synchronized allosteric regulation. Dalton Trans 2013; 42:981-6. [DOI: 10.1039/c2dt31940c] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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123
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Tiwari K, Mishra M, Singh VP. A highly sensitive and selective fluorescent sensor for Al3+ ions based on thiophene-2-carboxylic acid hydrazide Schiff base. RSC Adv 2013. [DOI: 10.1039/c3ra41573b] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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124
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Song EJ, Kang J, You GR, Park GJ, Kim Y, Kim SJ, Kim C, Harrison RG. A single molecule that acts as a fluorescence sensor for zinc and cadmium and a colorimetric sensor for cobalt. Dalton Trans 2013; 42:15514-20. [DOI: 10.1039/c3dt51635k] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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125
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Sen S, Mukherjee T, Chattopadhyay B, Moirangthem A, Basu A, Marek J, Chattopadhyay P. A water soluble Al3+ selective colorimetric and fluorescent turn-on chemosensor and its application in living cell imaging. Analyst 2012; 137:3975-81. [PMID: 22785321 DOI: 10.1039/c2an35560d] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An efficient water soluble fluorescent Al(3+) receptor, 1-[[(2-furanylmethyl)imino]methyl]-2-naphthol (1-H) was synthesized and characterized by physico-chemical and spectroscopic tools along with single crystal X-ray crystallography. High selectivity and affinity of 1-H towards Al(3+) in HEPES buffer (DMSO/water: 1/100) of pH 7.4 at 25 °C showed it to be suitable for detection of intracellular Al(3+) by fluorescence microscopy. Metal ions, viz. alkali (Na(+), K(+)), alkaline earth (Mg(2+), Ca(2+)), and transition-metal ions (Ni(2+), Zn(2+), Cd(2+), Co(2+), Cu(2+), Fe(3+), Cr(3+/6+), Hg(2+)) and Pb(2+), Ag(+) did not interfere. The lowest detection limit for Al(3+) was calculated to be 6.03 × 10(-7) M in 100 mM HEPES buffer (DMSO/water: 1/100). Theoretical calculations have also been included in support of the configuration of the probe-aluminium complex.
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Affiliation(s)
- Supriti Sen
- Department of Chemistry, The University of Burdwan, Golapbag, Burdwan-713104, India
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