1
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Sahu M, Ganguly M, Sharma P. Highly fluorescent quinone-capped silver hydrosol for environmental remediation and sensing applications. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 311:123981. [PMID: 38340445 DOI: 10.1016/j.saa.2024.123981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 01/22/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024]
Abstract
A metal-enhanced fluorescence was achieved from in situ-generated Ag0 nanoparticles in the proximity of 2-hydroxy benzaldehyde (2HB). Such nanoparticles eliminated methyl blue (MB) dye from water exclusively in the presence of Zn2+ and were proven to be an efficient adsorbent for environmental remediation (maximum uptake capacity 1065 mg·g-1). Ag was zero valent in the absorbent, while Zn2+ was in Zn(OH)2 form. Fe3+ brought back MB in the aqueous medium due to the strong interaction of MB with Fe3+ and the regeneration of blue color helped to design a selective and sensitive Fe3+ sensing platform colorimetrically (linear detection range 10-4-10-6 M; linear detection limit 10-6 M). The silver nanoparticle-induced metal-enhanced fluorescence was quenched efficiently with MB. Pb2+ restored the quenched fluorescence by removing MB from the proximity of the metalized surface of silver, and Pb2+ sensing was performed fluorometrically (linear detection range; 10-5-5 × 10-8 M limit of detection 5 × 10-8 M). Iron and lead were also estimated in a variety of natural water sources, including rainfall, drinking water from taps, and water from the Ganga River via spiking method.
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Affiliation(s)
- Mamta Sahu
- Department of Chemistry, Manipal University Jaipur, Dehmi Kalan, Jaipur 303007, Rajasthan, India
| | - Mainak Ganguly
- Department of Chemistry, Manipal University Jaipur, Dehmi Kalan, Jaipur 303007, Rajasthan, India.
| | - Priyanka Sharma
- Department of Chemistry, Manipal University Jaipur, Dehmi Kalan, Jaipur 303007, Rajasthan, India
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2
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Roy D, Pal A, Pal T. Electrochemical aspects of coinage metal nanoparticles for catalysis and spectroscopy. RSC Adv 2022; 12:12116-12135. [PMID: 35481094 PMCID: PMC9021847 DOI: 10.1039/d2ra00403h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 04/01/2022] [Indexed: 12/11/2022] Open
Abstract
Down scaling bulk materials can cause colloidal systems to evolve into microscopically dispersed insoluble particles. Herein, we describe the interesting applications of coinage metal nanoparticles (MNPs) as colloid dispersions especially gold and silver. The rich plasmon bands of gold and silver in the visible range are elaborated using the plasmon resonance and redox potential values of grown metal microelectrode (GME). The gradation of their standard reduction potential values (E 0), as evaluated from the Gibbs free energy change for bulk metal, is ascribed to the variation in their size. Also, the effect of nucleophiles in the electrolytic cell with metal nanoparticles (MNPs) is described. The nucleophile-guided reduction potential value is considered, which is applicable even for bulk noble metals. Typically, a low value (as low as E 0 = +0.40 V) causes the oxidation of metals at the O2 (air)/H2O interface. Under this condition, the oxidation of noble metal particles and dissolution of the noble metal in water are demonstrated. Thus, metal dissolution as a function of the size of metal nanoparticles becomes eventful and demonstrable with the addition of a surfactant to the solution. Interestingly, the reversal of the nobility of gold (Au) and silver (Ag) microelectrodes at the water/electrode interface is confirmed from the evolution of normal and inverted 'core-shell' structures, exploiting visible spectrophotometry and surface-enhanced Raman scattering (SERS) analysis. Subsequently, the effect of the size, shape, and facet- and support-selective catalysis of gold nanoparticles (NPs) and the effect of incident photons on current conversion without an applied potential are briefly discussed. Finally, the synergistic effect of the emissive behaviour of gold and silver clusters is productively exploited.
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Affiliation(s)
- Deblina Roy
- Department of Chemistry, National Institute of Technology Rourkela Odisha India
| | - Anjali Pal
- Department of Civil Engineering, Indian Institute of Technology Kharagpur Kharagpur 721302 India
| | - Tarasankar Pal
- Department of Chemical Sciences, University of Johannesburg P. O. Box 524, Auckland Park 2006, Kingsway Campus South Africa
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3
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Kokilavani S, Syed A, Thomas AM, Elgorban AM, Bahkali AH, Marraiki N, Raju LL, Das A, Khan SS. Development of multifunctional Cu sensitized Ag-dextran nanocomposite for selective and sensitive detection of mercury from environmental sample and evaluation of its photocatalytic and anti-microbial applications. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114742] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Kokilavani S, Syed A, Raju LL, Marraiki N, Al-Rashed S, Elgorban AM, Thomas AM, Khan SS. Highly selective and sensitive tool for the detection of Hg(II) using 3-(Trimethoxysilyl) propyl methacrylate functionalized Ag-Ce nanocomposite from real water sample. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 242:118738. [PMID: 32731149 DOI: 10.1016/j.saa.2020.118738] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 07/05/2020] [Accepted: 07/12/2020] [Indexed: 06/11/2023]
Abstract
Mercury and its derivates cause distinct toxicity and it is detrimental to the ecosystem where the excessive concentration contributes towards the environmental pollutants. The current study reported a colorimetric method for the detection of Hg(II) ion with high specificity and selectivity using Ag-Ce nanocomposite (NC) functionalized by 3-(Trimethoxysilyl) propyl methacrylate. The synthesized Ag-Ce NC was characterized by using double beam UV-visible spectrophotometer, zeta sizer, EDS, TEM, FT-IR, XRD and particle size analyzer. The synthesized particle possessed an average particle size of 27 ± 1 nm and zeta potential of -39.32 ± 3 mV. The brownish yellow colored Ag-Ce NC changed to colorless in presence of Hg(II) where the colorimetric detection was extremely specific and superior towards Hg(II) ion on comparing the tests with other metal ions. An excellent linear correlation was observed between absorbance (395 nm) and Hg(II) concentrations (1 nM-10 μM) (R2 = 0.988) with LOD of 0.03 nM. A cotton swab based probe was prepared for selective, elegant and low cost colorimetric method to detect Hg(II). The parametric study was performed for optimizing the suitable condition. The colorimetric probe developed by this study for Hg(II) detection using Ag-Ce NC shows excellent practical applicability.
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Affiliation(s)
- S Kokilavani
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India
| | - Asad Syed
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Lija L Raju
- Department of Zoology, Mar Ivanios College, Nalanchira, Thiruvananthapuram, India
| | - Najat Marraiki
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Sarah Al-Rashed
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdallah M Elgorban
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Ajith M Thomas
- Department of Botany and Biotechnology, St Xavier's College, Thumba, Thiruvananthapuram, India
| | - S Sudheer Khan
- Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India.
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5
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Liao L, Wang C, Zhuang S, Yan N, Zhao Y, Yang Y, Li J, Deng H, Wu Z. An Unprecedented Kernel Growth Mode and Layer‐Number‐Odevity‐Dependent Properties in Gold Nanoclusters. Angew Chem Int Ed Engl 2020; 59:731-734. [DOI: 10.1002/anie.201912090] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 10/23/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Lingwen Liao
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Chengming Wang
- Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Shengli Zhuang
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Nan Yan
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Yan Zhao
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Ying Yang
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Jin Li
- Tsinghua University-Peking University Joint Center for Life SciencesSchool of Life SciencesTsinghua University Beijing 100084 P. R. China
| | - Haiteng Deng
- MOE Key Laboratory of BioinformaticsSchool of Life SciencesTsinghua University Beijing 100084 P. R. China
| | - Zhikun Wu
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
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6
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Liao L, Wang C, Zhuang S, Yan N, Zhao Y, Yang Y, Li J, Deng H, Wu Z. An Unprecedented Kernel Growth Mode and Layer‐Number‐Odevity‐Dependent Properties in Gold Nanoclusters. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Lingwen Liao
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Chengming Wang
- Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Shengli Zhuang
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Nan Yan
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Yan Zhao
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Ying Yang
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
| | - Jin Li
- Tsinghua University-Peking University Joint Center for Life SciencesSchool of Life SciencesTsinghua University Beijing 100084 P. R. China
| | - Haiteng Deng
- MOE Key Laboratory of BioinformaticsSchool of Life SciencesTsinghua University Beijing 100084 P. R. China
| | - Zhikun Wu
- Key Laboratory of Materials PhysicsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsChinese Academy of Sciences Hefei 230031 P. R. China
- Institute of Physical Science and Information TechnologyAnhui University Hefei Anhui 230601 P. R. China
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7
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Ganguly M, Ariya PA. Novel Technology for the Removal of Brilliant Green from Water: Influence of Post-Oxidation, Environmental Conditions, and Capping. ACS OMEGA 2019; 4:12107-12120. [PMID: 31460324 PMCID: PMC6682118 DOI: 10.1021/acsomega.9b00757] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 05/20/2019] [Indexed: 05/24/2023]
Abstract
Chemical dyes are used in a wide range of anthropogenic activities and are generally not biodegradable. Hence, sustainable recycling processes are needed to avoid their accumulation in the environment. A one-step synthesis of Fecore-maghemiteshell (Fe-MM) for facile, instantaneous, cost-effective, sustainable, and efficient removal of brilliant green (BG) dye from water has been reported here. The homogenous and monolayer type of adsorption is, to our knowledge, the most efficient, with a maximum uptake capacity of 1000 mg·g-1, for BG on Fe-MM. This adsorbent was shown to be efficient in occurring in time-scales of seconds and to be readily recyclable (ca. 91%). As iron/iron oxide possesses magnetic behavior, a strong magnet could be used to separate Fe-MM coated with BG. Thus, the recycling process required a minimum amount of energy. Capping Fe-MM by hydrophilic clay minerals further enhanced the BG uptake capacity, by reducing unwanted aggregation. Interestingly, capping the adsorbent by hydrophobic plastic (low-density polyethylene) had a completely inverse effect on clay minerals. BG removal using this method is found to be quite selective among the five common industrial dyes tested in this study. To shed light on the life cycle analysis of the composite in the environment, the influence of selected physicochemical factors (T, pH, hν, O3, and NO2) was examined, along with four types of water samples (melted snow, rain, river, and tap water). To evaluate the potential limitations of this technique, because of likely competitive reactions with metal ion contaminants in aquatic systems, additional experiments with 13 metal ions were performed. To decipher the adsorption mechanism, we deployed four reducing agents (NaBH4, hydrazine, LiAlH4, and polyphenols in green tea) and NaBH4, exclusively, favored the generation of an efficient adsorbent via aerial oxidation. The drift of electron density from electron-rich Fecore to maghemite shells was attributed to be responsible for the electrostatic adsorption of N+ in BG toward Fe-MM. This technology is deemed to be environmentally sustainable in environmental remediation, namely, in waste management protocol.
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Affiliation(s)
- Mainak Ganguly
- Department
of Atmospheric and Oceanic Sciences, McGill
University, Montreal, Quebec H3A 0B9, Canada
| | - Parisa A. Ariya
- Department
of Atmospheric and Oceanic Sciences, McGill
University, Montreal, Quebec H3A 0B9, Canada
- Department
of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
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8
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Colorimetric detection of hydrogen peroxide and lactate based on the etching of the carbon based Au-Ag bimetallic nanocomposite synthesized by carbon dots as the reductant and stabilizer. Anal Chim Acta 2016; 947:23-31. [DOI: 10.1016/j.aca.2016.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 09/24/2016] [Accepted: 10/03/2016] [Indexed: 12/14/2022]
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9
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Gan Z, Lin Y, Luo L, Han G, Liu W, Liu Z, Yao C, Weng L, Liao L, Chen J, Liu X, Luo Y, Wang C, Wei S, Wu Z. Fluorescent Gold Nanoclusters with Interlocked Staples and a Fully Thiolate-Bound Kernel. Angew Chem Int Ed Engl 2016; 55:11567-71. [DOI: 10.1002/anie.201606661] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Zibao Gan
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Yuejian Lin
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry; Fudan University; Shanghai 200433 China
| | - Lun Luo
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 China
| | - Guangmei Han
- Institute of Intelligent Machines; Chinese Academy of Sciences; Hefei 230031 China
| | - Wei Liu
- National Synchrotron Radiation Facility; University of Science and Technology of China; Hefei 230029 China
| | - Zhengjie Liu
- Institute of Intelligent Machines; Chinese Academy of Sciences; Hefei 230031 China
| | - Chuanhao Yao
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Linhong Weng
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry; Fudan University; Shanghai 200433 China
| | - Lingwen Liao
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Jishi Chen
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Xu Liu
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 China
| | - Chengming Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; University of Science and Technology of China; Hefei 230026 China
| | - Shiqiang Wei
- National Synchrotron Radiation Facility; University of Science and Technology of China; Hefei 230029 China
| | - Zhikun Wu
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
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10
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Gan Z, Lin Y, Luo L, Han G, Liu W, Liu Z, Yao C, Weng L, Liao L, Chen J, Liu X, Luo Y, Wang C, Wei S, Wu Z. Fluorescent Gold Nanoclusters with Interlocked Staples and a Fully Thiolate-Bound Kernel. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606661] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zibao Gan
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Yuejian Lin
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry; Fudan University; Shanghai 200433 China
| | - Lun Luo
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 China
| | - Guangmei Han
- Institute of Intelligent Machines; Chinese Academy of Sciences; Hefei 230031 China
| | - Wei Liu
- National Synchrotron Radiation Facility; University of Science and Technology of China; Hefei 230029 China
| | - Zhengjie Liu
- Institute of Intelligent Machines; Chinese Academy of Sciences; Hefei 230031 China
| | - Chuanhao Yao
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Linhong Weng
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry; Fudan University; Shanghai 200433 China
| | - Lingwen Liao
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Jishi Chen
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Xu Liu
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
| | - Yi Luo
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Dalian 116024 China
| | - Chengming Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; University of Science and Technology of China; Hefei 230026 China
| | - Shiqiang Wei
- National Synchrotron Radiation Facility; University of Science and Technology of China; Hefei 230029 China
| | - Zhikun Wu
- Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 China
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11
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Ganguly M, Jana J, Pal A, Pal T. Synergism of gold and silver invites enhanced fluorescence for practical applications. RSC Adv 2016. [DOI: 10.1039/c5ra26430h] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synergism of gold and silver improves fluorescence behavior of gold–silver bimetallic clusters with practical applications.
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Affiliation(s)
| | - Jayasmita Jana
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Anjali Pal
- Department of Civil Engineering
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Tarasankar Pal
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
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12
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Ganguly M, Mondal C, Pal A, Pratik SM, Pal J, Pal T. Aggregation of nitroaniline in tetrahydrofuran through intriguing H-bond formation by sodium borohydride. Phys Chem Chem Phys 2015; 16:12865-74. [PMID: 24845227 DOI: 10.1039/c4cp00497c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The participation of sodium borohydride (NaBH4) in hydrogen bonding interactions and transient anion radical formation has been proved. Thus, the properties of NaBH4 are extended beyond the purview of its normal reducing capability and nucleophilic property. It is reported that ortho- and para-nitroanilines (NAs) form stable aggregates only in tetrahydrofuran (THF) in the presence of NaBH4 and unprecedented orange/red colorations are observed. The same recipe with nitrobenzene instead of nitroanilines (NAs) in the presence of NaBH4 evolves a transient rose red solution due to the formation of a highly fluorescent anion radical. Spectroscopic studies (UV-vis, fluorescence, RLS, Raman, NMR etc.) as well as theoretical calculations supplement the J-aggregate formation of NAs due to extensive hydrogen bonding. This is the first report where BH4(-) in THF has been shown to support such an aggregation process through H-bonding. It is further confirmed that stable intermolecular hydrogen bond-induced aggregation requires a geometrical match in both the nitro- and amino-functionalities attached to the phenyl ring with proper geometry. On the contrary, meta-nitroaniline remains as the odd man out and does not take part in such aggregation. Surprisingly, Au nanoparticles dismantle the J-aggregates of NA in THF. Explicit hydrogen bond formation in NA has been confirmed experimentally considering its promising applications in different fields including non-linear optics.
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Affiliation(s)
- Mainak Ganguly
- Department of Chemistry, Indian Institute of Technology, Kharagpur-721302, India.
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Ganguly M, Pal J, Mondal C, Pal A, Pal T. Imine (–CHN–) brings selectivity for silver enhanced fluorescence. Dalton Trans 2015; 44:4370-9. [DOI: 10.1039/c4dt04022h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong silver and gold stimulated fluorescence enhancement of alkaline salicylaldehyde solution have been observed. Ammonia or primary amine quantitatively eliminates gold enhanced fluorescence, keeping silver enhanced fluorescence unaffected.
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Affiliation(s)
| | - Jaya Pal
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Chanchal Mondal
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Anjali Pal
- Department of Civil Engineering
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Tarasankar Pal
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
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14
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Ganguly M, Jana J, Das B, Dhara S, Pal A, Pal T. Orange-red silver emitters for sensing application and bio-imaging. Dalton Trans 2015; 44:11457-69. [DOI: 10.1039/c5dt00928f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Strongly fluorescent HFL-containing Ag@Au particles are synthesized via a modified hydrothermal technique. This solution is used for sulfide sensing and cell imaging.
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Affiliation(s)
| | - Jayasmita Jana
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Bodhisatwa Das
- School of Medical Science & Technology
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Santanu Dhara
- School of Medical Science & Technology
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Anjali Pal
- Department of Civil Engineering
- Indian Institute of Technology
- Kharagpur-721302
- India
| | - Tarasankar Pal
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur-721302
- India
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15
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Ganguly M, Jana J, Mondal C, Pal A, Pal T. Green synthesis of highly fluorescent Au(i)@Ag2/Ag3-thiolate core–shell particles for selective detection of cysteine and Pb(ii). Phys Chem Chem Phys 2014; 16:18185-97. [DOI: 10.1039/c4cp01782j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Ganguly M, Mondal C, Pal J, Pal A, Negishi Y, Pal T. Fluorescent Au(i)@Ag2/Ag3giant cluster for selective sensing of mercury(ii) ion. Dalton Trans 2014; 43:11557-65. [DOI: 10.1039/c4dt01158a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ganguly M, Mondal C, Jana J, Pal A, Pal T. Selective dopamine chemosensing using silver-enhanced fluorescence. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4120-8. [PMID: 24650302 DOI: 10.1021/la404982t] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Condensation product of salicylaldehyde and 1,3 propylenediamine becomes a diiminic Schiff base, which is oxidized by AgNO3 in alkaline solution, and in turn, stable Ag(0) is produced at room temperature. Under this condition, the solution exhibits intense silver nanoparticle enhanced fluorescence (SEF) with the λ(em) at 412 nm. Dopamine is selectively detected down to the nanomolar level via exclusive fluorescence quenching of the SEF. Dopamine-infested solution regains the fluorescence [i.e., SEF in the presence of Hg(II) ions]. Thus dopamine and Hg(II) in succession demonstrate "turn off/on" fluorescence due to the change in the scattering cross section of Ag(0) and gives a quantitative measure of dopamine in real samples. The proposed method is free from interferences of common biocompetitors.
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Affiliation(s)
- Mainak Ganguly
- Department of Chemistry, Indian Institute of Technology , Kharagpur-721302, India
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Chen PC, Ma JY, Chen LY, Lin GL, Shih CC, Lin TY, Chang HT. Photoluminescent AuCu bimetallic nanoclusters as pH sensors and catalysts. NANOSCALE 2014; 6:3503-3507. [PMID: 24562311 DOI: 10.1039/c3nr06123j] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A facile and one-pot approach to the preparation of gold (Au) and copper (Cu) bimetallic nanoclusters (NCs) is unveiled. AuCu NCs reveal features of orange photoluminescence (PL), reversible pH-dependent PL properties, and efficient catalytic activity for degradation of methylene blue (MB).
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Affiliation(s)
- Po-Cheng Chen
- Department of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei, 10617, Taiwan.
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Ganguly M, Mondal C, Jana J, Pal A, Pal T. Photoproduced fluorescent Au(I)@(Ag2/Ag3)-thiolate giant cluster: an intriguing sensing platform for DMSO and Pb(II). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:348-357. [PMID: 24359547 DOI: 10.1021/la403848z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Synergistic evolution of fluorescent Au(I)@(Ag2/Ag3)-thiolate core-shell particles has been made possible under the Sun in presence of the respective precursor coinage metal compounds and glutathione (GSH). The green chemically synthesized fluorescent clusters are giant (∼600 nm) in size and robust. Among all the common water miscible solvents, exclusively DMSO exhibits selective fluorescence quenching (Turn Off) because of the removal of GSH from the giant cluster. Again, only Pb(II) ion brings back the lost fluorescence (Turn On) leaving aside all other metal ions. This happens owing to the strong affinity of the sulfur donor of DMSO for Pb(II). Thus, employing the aqueous solution containing the giant cluster, we can detect DMSO contamination in water bodies at trace level. Besides, a selective sensing platform has emerged out for Pb(II) ion with a detection limit of 14 × 10(-8) M. Pb(II) induced fluorescence recovery is again vanished by I(-) implying a promising route to sense I(-) ion.
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Affiliation(s)
- Mainak Ganguly
- Department of Chemistry, Indian Institute of Technology , Kharagpur-721302, West Bengal, India
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