1
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Jaswal V, Pachisia S, Chaudhary J, Rangan K, Sarkar M. Selective sensing of picric acid using a Zn(II)-metallacycle: experimental and theoretical validation of the sensing mechanism and quantitative analysis of sensitivity in contact mode detection. Dalton Trans 2024; 53:14710-14724. [PMID: 39158052 DOI: 10.1039/d4dt01771d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2024]
Abstract
A combination of N,N',N''-tris(3-pyridyl)-1,3,5-benzenetricarboxamide (L1) and p-chlorobenzoic acid (HL2) with Zn(NO3)2·6H2O resulted in the formation of a dinuclear metallacycle [ZnL1(L2)2(DMF)2]2 (1(DMF)4). In 1(DMF)4, the Zn(II) centre adopts a square pyramidal geometry, while one of the pyridyl N out of the three pyridyl groups in L1 remained uncoordinated. Solvated DMF molecules are present in 1(DMF)4. The structural and chemical nature of 1(DMF)4 is effective for it to act as a potential fluorescent probe for the detection of nitroaromatic compounds. It is observed that the probe, 1(DMF)4, could selectively detect picric acid (PA) among various aromatic compounds in solution (DMSO), while the solid state (contact mode) detection showed a positive sensing response for the nitrophenols (PA: 87% quenching efficiency, 2,4-dinitrophenol (2,4-DNP): 57% quenching efficiency and 4-nitrophenol (4-NP): 40% quenching efficiency). The limit of detection (LOD) of PA by the probe in DMSO was found to be 6.8 × 10-11 M while the LOD in contact mode detection was estimated to be 0.49 ng cm-2. The mechanism of selective detection of PA by 1(DMF)4 in DMSO was analyzed through photophysical studies, 1H-NMR experiments and also by density functional theory (DFT) calculations. The effective overlap of the absorption spectrum of 1(DMF)4 and emission spectrum of PA in DMSO suggests that the Förster resonance energy transfer (FRET) is responsible for quenching phenomena in DMSO. The DFT calculations and molecular docking studies showed the adduct formation due to the favorable interactions between 1(DMF)4 and PA in DMSO, while negligible interactions were observed between 1(DMF)4 with other aromatic compounds. The experimental and DFT studies showed that the efficient sensing ability of PA by 1(DMF)4 in the solid-state was due to photoelectron transfer (PET) and FRET phenomena described herein.
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Affiliation(s)
- Vishakha Jaswal
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan 333031, India.
| | - Sanya Pachisia
- Department of Chemistry, University of Delhi, India
- Department of Chemistry, University of California, Irvine, California, USA
| | - Jagrity Chaudhary
- Department of Chemistry, Purdue University, West Lafayette, Indiana, USA
| | - Krishnan Rangan
- Department of Chemistry, BITS Pilani, Hyderabad Campus, Jawahar Nagar Shameerpet Mandal, Ranga Reddy District, Hyderabad 500078, India
| | - Madhushree Sarkar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani, Pilani Campus, Rajasthan 333031, India.
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2
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Nair RR, Debnath S, Ghosh R, Bhattacharya A, Raju M, Chatterjee PB. Label-Free Detection of Unbound Bilirubin and Nitrophenol Explosives in Water by a Mechanosynthesized Dual Functional Zinc Complex: Recognition of Picric Acid in Various Common Organic Media. Chemistry 2024; 30:e202303068. [PMID: 38150640 DOI: 10.1002/chem.202303068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Indexed: 12/29/2023]
Abstract
High levels of unconjugated bilirubin (UB) in serum lead to asymptomatic and neonatal jaundice and brain dysfunctions. Herein, we have reported the detection of UB at as low as 1 μM in an aqueous alkaline medium using a Zn(II) complex. The specificity of the complex has been validated by the HPLC in the concentration window 6-90 μM, which is rare. The sensory response of the probe at physiological pH against nitro explosives developed it as an instant-acting fluorosensor for picric acid (PA) and 2,4-dinitrophenol (2,4-DNP). Spectroscopic titration provided a binding constant of 4×105 M-1 with PA. The naked eye detection was found to be 15 μM. The solid-state photoluminescent nature of the complex enabled it for PA sensing in the solid phase. Interestingly, the probe remained fluorescent in various volatile and non-volatile organic solvents. As a result, it can also detect PA and 2,4-DNP in a wide range of common organic media. NMR studies revealed the coordination of PA, 2,4-DNP, and UB to the Zn(II) center of the probe, which is responsible for the observed quenching of the probe with the analytes.
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Affiliation(s)
- Ratish R Nair
- Analytical & Environmental Science Division and Centralized Instrument Facility, CSIR-CSMCRI, G. B. Marg, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Snehasish Debnath
- Analytical & Environmental Science Division and Centralized Instrument Facility, CSIR-CSMCRI, G. B. Marg, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Riya Ghosh
- Analytical & Environmental Science Division and Centralized Instrument Facility, CSIR-CSMCRI, G. B. Marg, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Arnab Bhattacharya
- Analytical & Environmental Science Division and Centralized Instrument Facility, CSIR-CSMCRI, G. B. Marg, Bhavnagar, India
| | - M Raju
- Analytical & Environmental Science Division and Centralized Instrument Facility, CSIR-CSMCRI, G. B. Marg, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Department of Chemistry, Koneru Lakshmaiah Education Foundation, Bowrampet, Hyderabad, India
| | - Pabitra B Chatterjee
- Analytical & Environmental Science Division and Centralized Instrument Facility, CSIR-CSMCRI, G. B. Marg, Bhavnagar, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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3
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Goyal H, Annan I, Ahluwalia D, Bag A, Gupta R. Discriminative 'Turn-on' Detection of Al 3+ and Ga 3+ Ions as Well as Aspartic Acid by Two Fluorescent Chemosensors. SENSORS (BASEL, SWITZERLAND) 2023; 23:1798. [PMID: 36850396 PMCID: PMC9964346 DOI: 10.3390/s23041798] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/01/2023] [Accepted: 02/02/2023] [Indexed: 06/17/2023]
Abstract
In this work, two Schiff-base-based chemosensors L1 and L2 containing electron-rich quinoline and anthracene rings were designed. L1 is AIEE active in a MeOH-H2O solvent system while formed aggregates as confirmed by the DLS measurements and fluorescence lifetime studies. The chemosensor L1 was used for the sensitive, selective, and reversible 'turn-on' detection of Al3+ and Ga3+ ions as well as Aspartic Acid (Asp). Chemosensor L2, an isomer of L1, was able to selectively detect Ga3+ ion even in the presence of Al3+ ions and thus was able to discriminate between the two ions. The binding mode of chemosensors with analytes was substantiated through a combination of 1H NMR spectra, mass spectra, and DFT studies. The 'turn-on' nature of fluorescence sensing by the two chemosensors enabled the development of colorimetric detection, filter-paper-based test strips, and polystyrene film-based detection techniques.
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Affiliation(s)
- Hina Goyal
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ibrahim Annan
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | | | - Arijit Bag
- Department of Applied Chemistry, Maulana Abul Kalam Azad University of Technology, Nadia 742149, India
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi 110007, India
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4
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Kose A, Erkan S, Tümer M. A series of phenanthroline-imine compounds: Computational, OLED properties and fluorimetric sensing of nitroaromatic compounds. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:122006. [PMID: 36283207 DOI: 10.1016/j.saa.2022.122006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 10/10/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
In this study, Schiff base compounds (1-5) were synthesized by the reaction of 5-amino-1,10-phenanthroline with various aldehydes. The molecular structures of the synthesized compounds were characterized by FT-IR, 1H/13C NMR and mass spectroscopic methods. Single crystals of 1 were obtained and their molecular structures in crystalline form were determined by single crystal X-ray diffraction study. The sensor properties of the synthesized compounds against nitroaromatic compounds [nitrobenzene (NB), 4-nitrophenol (NP), 2,4-dintrophenol (DNP) and 1,3,5-trinitrophenol (TNP)] were investigated by fluorescence spectroscopy. Compound 3 have highest sensitivity for the sensing of 1,3,5-trinitrophenol (TNP) (Ksv: 4.63 × 104 M-1) with LOD of 4.01 µM while compound 5 showed the highest sensitivity for 2,4-dinitrophenol (DNP) (Ksv: 5.71 × 104 M-1) with LOD of 4.75 µM. In addition, the structural parameters (bond angles/lengths), contour diagrams of HOMO/LUMO molecular orbitals, molecular electrostatic potential (MEP) maps, non-linear optical (NLO) and OLED properties were investigated by computational studies. According to the HOMO and LUMO energies, the NLO property of the molecule (5) is higher than both other molecules and the reference substance urea.
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Affiliation(s)
- Ayşegül Kose
- Department of Property Protection and Safety, Elbistan Vocational School, Istiklal University, Kahramanmaras, Turkey.
| | - Sultan Erkan
- Chemistry Department, Cumhuriyet University, Sivas 58140, Turkey
| | - Mehmet Tümer
- Chemistry Department, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
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5
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Singh D, Tomar S, Singh S, Chaudhary G, Singh AP, Gupta R. A fluorescent pH switch probe for the ‘turn-on’ dual-channel discriminative detection of magnesium and zinc ions. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114334] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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6
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Singh D, Ibrahim A, Gupta R. Coumarin‐Based Reversible Fluorescent Chemosensors for the Sequential Detection of Copper and Citrate Ions. ChemistrySelect 2022. [DOI: 10.1002/slct.202203326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Affiliation(s)
- Devender Singh
- Department of Chemistry University of Delhi Delhi 110007 India
| | - Annan Ibrahim
- Department of Chemistry University of Delhi Delhi 110007 India
| | - Rajeev Gupta
- Department of Chemistry University of Delhi Delhi 110007 India
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7
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Singh Rana V, Anand V, Shekhar Sarkar S, Sandhu N, Verma M, Naidu S, Kumar K, Yadav RK, Shrivastava R, Singh AP. A novel pyrene-based Aggregation Induced Enhanced Emission active Schiff base fluorophore as a selective “turn-on” sensor for Sn2+ ions and its application in lung adenocarcinoma cells. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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8
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Guo R, Wang G, Liu X, Yang X, Liu W, Liu W. A novel acylhydrazone Zn coordination polymer for the determination of picric acid. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Turn-on fluorescent detection of nickel and zinc ions by two related chemosensors containing naphthalimide ring(s). J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132901] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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10
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Goyal H, Gupta R. Sensing and formation of a stable gel in the presence of picric acid by a low-molecular-weight-gelator. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Abbasi A, Shakir M. Simple One-step Solid-state Synthesis of Highly Crystalline N Doped Carbon Dots As Selective Turn Off-sensor for Picric Acid and Metanil Yellow. J Fluoresc 2022; 32:1239-1246. [PMID: 35353276 DOI: 10.1007/s10895-022-02928-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 03/06/2022] [Indexed: 01/20/2023]
Abstract
A simple one-step solid-state pyrolysis method has been employed to synthesize highly crystalline nitrogen-doped carbon dots using adipic acid and urea as carbon and nitrogen sources. The prepared carbon dots displayed UV emission ( λex = 290 nm and λem = 370 nm) and blue fluorescence emission ( λex = 360 nm and λem = 420 nm). These crystalline nitrogen-doped carbon dots exhibited a quantum yield of 6% with tryptophan as standard at 370 nm emission and 14% with quine sulfate as standard at 420 nm emission. The synthesized carbon dots were spherical, having a mean particle diameter of 2.56 ± 0.57 nm. The prepared carbon dots have large functional groups on their surface, which renders excellent water solubility to them. Carbon dots was used as selective and sensitive turn off sensor for detection of picric acid Metanil yellow with the linear response for picric acid ranging from 2 μM to 22 μM and 2-45 μM with a detection limit of 0.06 μM and 0.45 μM and for Metanil yellow ranging from 1 μM to 30 μM with a detection limit of 0.32 μM. The mechanism for detecting metanil yellow is proposed to be the inner filter effect. At the same time, it is both the inner filter effect and FRET for picric acid. The actual sample application of carbon dots as a nanosensor was tested to detect metanil yellow as an adulterant in turmeric powder.
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Affiliation(s)
- Ambreen Abbasi
- Division of Inorganic Chemistry, Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India
| | - Mohammad Shakir
- Division of Inorganic Chemistry, Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, India.
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12
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Pachisia S, Gupta R, Gupta R. Molecular Assemblies Offering Hydrogen-Bonding Cavities: Influence of Macrocyclic Cavity and Hydrogen Bonding on Dye Adsorption. Inorg Chem 2022; 61:3616-3630. [PMID: 35156802 DOI: 10.1021/acs.inorgchem.1c03747] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This work presents a set of Hg macrocycles of amide-phosphine-based ligands offering H-bonding cavities of different dimensions. Such macrocycles are shown to selectively adsorb anionic dyes followed by neutral dyes as well as Prontosil, a biologically relevant antibiotic, within their cavities with the aid of H-bonding-assisted encapsulation. Kinetic experiments supported by spectroscopic and docking studies illustrate the importance of the cavity structure as well as H-bonds for the selective adsorption of dyes.
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Affiliation(s)
- Sanya Pachisia
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ruchika Gupta
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi 110007, India
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13
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Dhivya R, Kavitha V, Gomathi A, Keerthana P, Santhalakshmi N, Viswanathamurthi P, Haribabu J. Dinitrobenzene ether reactive turn-on fluorescence probes for the selective detection of H 2S. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 14:58-66. [PMID: 34889907 DOI: 10.1039/d1ay01700d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two novel fluorescent probes, namely, 3-(2,4-dinitrophenoxy)-2-(4-(diphenylamino)phenyl)-4H-chromen-4-one (P1) and 3-(2,4-dinitrophenoxy)-2-(pyren-1-yl)-4H-chromen-4-one (P2), were designed and synthesized here. The probes (P1 and P2) were found to be highly selective and sensitive toward hydrogen sulfide (H2S) in the presence of a wide range of anions. The new probes (P1 and P2) were fully characterized by analytical, NMR spectroscopy (1H and 13C), and ESI mass spectrometry. The sensing capability of chemodosimeters (P1 and P2) toward H2S was confirmed by fluorescence studies. The 'turn-on' fluorescence was used to calculate the detection limit of probes (LOD), which were found to be 2.4 and 1.2 μM for P1 and P2, respectively. Moreover, the probes were tested for their cytotoxicity against HeLa cells using the MTT assay and found to be non-cytotoxic in nature; hence, the probes P1 and P2 were successfully utilized to visualize H2S in the living cells.
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Affiliation(s)
- Rajasekaran Dhivya
- Department of Chemistry, Periyar University, Salem, Tamil Nadu 636011, India.
| | | | - Asaithambi Gomathi
- Department of Chemistry, Periyar University, Salem, Tamil Nadu 636011, India.
| | - Ponmudi Keerthana
- Department of Chemistry, Periyar University, Salem, Tamil Nadu 636011, India.
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14
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Prabha D, Singh D, Kumar P, Gupta R. Selective Detection of Picric Acid and Pyrosulfate Ion by Nickel Complexes Offering a Hydrogen-Bonding-Based Cavity. Inorg Chem 2021; 60:17889-17899. [PMID: 34809423 DOI: 10.1021/acs.inorgchem.1c02479] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work describes the synthesis and characterization of three mononuclear nickel complexes supported with amide-based pincer ligands. All three complexes presented an H-bonding-based cavity due to the migration of amidic protons to the appended heterocyclic rings that formed H-bonds with the metal-ligated solvent molecule(s). These complexes functioned as the nanomolar chemosensors for the detection of picric acid and pyrosulfate ion as inferred by the detailed absorption and emission spectral studies while further supported with FTIR, NMR, and mass spectra of the isolated products. We also illustrate a few practical detection methods for the sensing of picric acid in the solution state as the naked-eye colorimetric methods and in the solid state by employing polystyrene films.
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Affiliation(s)
- Divya Prabha
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Devender Singh
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Pramod Kumar
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi 110007, India
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15
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Yadav S, Vijayan P, Gupta R. Ruthenium complexes of N/O/S based multidentate ligands: Structural diversities and catalysis perspectives. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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17
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Kumar P, Kumar V, Gupta R. Dipicolinamide and isophthalamide based fluorescent chemosensors: recognition and detection of assorted analytes. Dalton Trans 2021; 49:9544-9555. [PMID: 32627772 DOI: 10.1039/d0dt01508c] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This perspective focuses on a variety of fluorescent receptors based on dipicolinamide and isophthalamide groups and their significant roles in the molecular recognition, sensing and detection of assorted analytes ranging from metal ions, anions, neutral molecules, drugs and explosives. Both the "turn-on" and "turn-off" nature of sensing highlights noteworthy applications in many fields encompassing biological, medicinal, environmental and analytical disciplines.
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Affiliation(s)
- Pramod Kumar
- Department of Chemistry, University of Delhi, Delhi-110007, India.
| | - Vijay Kumar
- Department of Chemistry, University of Delhi, Delhi-110007, India.
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi-110007, India.
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18
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Levine M. Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry. Front Chem 2021; 9:616815. [PMID: 33937184 PMCID: PMC8085505 DOI: 10.3389/fchem.2021.616815] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 01/11/2021] [Indexed: 01/02/2023] Open
Abstract
The detection of pesticides in real-world environments is a high priority for a broad range of applications, including in areas of public health, environmental remediation, and agricultural sustainability. While many methods for pesticide detection currently exist, the use of supramolecular fluorescence-based methods has significant practical advantages. Herein, we will review the use of fluorescence-based pesticide detection methods, with a particular focus on supramolecular chemistry-based methods. Illustrative examples that show how such methods have achieved success in real-world environments are also included, as are areas highlighted for future research and development.
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Affiliation(s)
- Mindy Levine
- Ariel University, Department of Chemical Sciences, Ariel, Israel
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19
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Yadav S, Vijayan P, Yadav S, Gupta R. Ruthenium complexes of phosphine-amide based ligands as efficient catalysts for transfer hydrogenation reactions. Dalton Trans 2021; 50:3269-3279. [PMID: 33587074 DOI: 10.1039/d0dt04401f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work presents three mononuclear Ru(ii) complexes of tridentate phosphine-carboxamide based ligands providing a NNP coordination environment. The octahedral Ru(ii) ion shows additional coordination with co-ligands; CO, Cl and CH3OH. All three Ru(ii) complexes were thoroughly characterized including their crystal structures. These Ru(ii) complexes were utilized as catalysts for the transfer hydrogenation of assorted carbonyl compounds, including some challenging biologically relevant substrates, using isopropanol as the hydrogen source. The binding studies illustrated the coordination of the isopropoxide ion by replacing a Ru-ligated chloride ion followed by the generation of the Ru-H intermediate that was isolated and characterized and was found to be involved in the catalysis.
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Affiliation(s)
- Samanta Yadav
- Department of Chemistry, University of Delhi, Delhi - 110 007, India.
| | | | - Sunil Yadav
- Department of Chemistry, University of Delhi, Delhi - 110 007, India.
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi - 110 007, India.
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20
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Pachisia S, Kishan R, Yadav S, Gupta R. Half-Sandwich Ruthenium Complexes of Amide-Phosphine Based Ligands: H-Bonding Cavity Assisted Binding and Reduction of Nitro-substrates. Inorg Chem 2021; 60:2009-2022. [PMID: 33459009 DOI: 10.1021/acs.inorgchem.0c03505] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present synthesis and characterization of two half-sandwich Ru(II) complexes supported with amide-phosphine based ligands. These complexes presented a pyridine-2,6-dicarboxamide based pincer cavity, decorated with hydrogen bonds, that participated in the binding of nitro-substrates closer to the Ru(II) centers, which is further supported with binding and docking studies. These ruthenium complexes functioned as the noteworthy catalysts for the borohydride mediated reduction of assorted nitro-substrates. Mechanistic studies not only confirmed the intermediacy of [Ru-H] in the reduction but also asserted the involvement of several organic intermediates during the course of the catalysis. A similar Ru(II) complex that lacked pyridine-2,6-dicarboxamide based pincer cavity substantiated its unique role both in the substrate binding and the subsequent catalysis.
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Affiliation(s)
- Sanya Pachisia
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ram Kishan
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Samanta Yadav
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi 110007, India
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21
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Parvathy P, Dheepika R, Abhijnakrishna R, Imran P, Nagarajan S. Fluorescence quenching of triarylamine functionalized phenanthroline-based probe for detection of picric acid. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112780] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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22
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Yang Y, Ren G, Li W, Gu D, Liang Z, Liu Y, Pan Q. Three coordination complexes based on mixed ligand strategy: Coordination diversities and nitrobenzene detections. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Klapec DJ, Czarnopys G, Pannuto J. Interpol review of detection and characterization of explosives and explosives residues 2016-2019. Forensic Sci Int Synerg 2020; 2:670-700. [PMID: 33385149 PMCID: PMC7770463 DOI: 10.1016/j.fsisyn.2020.01.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 01/23/2020] [Indexed: 02/06/2023]
Abstract
This review paper covers the forensic-relevant literature for the analysis and detection of explosives and explosives residues from 2016-2019 as a part of the 19th Interpol International Forensic Science Managers Symposium. The review papers are also available at the Interpol website at: https://www.interpol.int/Resources/Documents#Publications.
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Affiliation(s)
- Douglas J. Klapec
- United States Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, Forensic Science Laboratory, 6000 Ammendale Road, Ammendale, MD, 20705, USA
| | - Greg Czarnopys
- United States Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, Forensic Science Laboratory, 6000 Ammendale Road, Ammendale, MD, 20705, USA
| | - Julie Pannuto
- United States Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, Forensic Science Laboratory, 6000 Ammendale Road, Ammendale, MD, 20705, USA
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Singhal D, Althagafi I, Kumar A, Yadav S, Prasad AK, Pratap R. Thieno[3,2-c]pyran: an ESIPT based fluorescence “turn-on” molecular chemosensor with AIE properties for the selective recognition of Zn2+ ion. NEW J CHEM 2020. [DOI: 10.1039/d0nj02236e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Thieno[3,2-c]pyran was synthesized as a fluorescent turn-on chemosensor for the selective recognition of Zn2+ ions with a low detection limit (0.67 μM), and it also exhibited AIE properties.
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Affiliation(s)
- Divya Singhal
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
| | | | - Ashish Kumar
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
| | - Saroj Yadav
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
| | - Ashok K. Prasad
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
| | - Ramendra Pratap
- Department of Chemistry
- University of Delhi, North Campus
- Delhi-110007
- India
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25
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Rajak R, Saraf M, Verma SK, Kumar R, Mobin SM. Dy(III)-Based Metal-Organic Framework as a Fluorescent Probe for Highly Selective Detection of Picric Acid in Aqueous Medium. Inorg Chem 2019; 58:16065-16074. [PMID: 31718173 DOI: 10.1021/acs.inorgchem.9b02611] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A dysprosium metal-organic framework, {[Dy(μ2-FcDCA)1.5(MeOH)(H2O)]·0.5H2O}n (1), where FcDCA = 1,1'-ferrocene dicarboxylic acid, was prepared by slow-diffusion technique at room temperature. The crystal structure analysis of 1 by single-crystal X-ray diffraction reveals different binding modes of FcDCA linkers coordinated with Dy(III) metal ions, which forms continuous porous two-dimensional (2D) infinite framework. The resulting 2D layers are linked by π···π interactions to build three-dimensional (3D) supramolecular framework. Observably, this thermally stable 3D architecture was topologically simplified as a three-connected uninodal net with fes topology. Furthermore, the practical applicability of 1 was investigated as a fluorescence sensor for the sensitive detection of picric acid in aqueous medium with an impressive detection limit of 0.71 μM with quenching constant (KSV) quantified to be 8.55 × 104 M-1. The distinguished selectivity in the presence of other nitroaromatics suggests the possible incorporation of 1 in real-world futuristic diagnostic kits. Additionally, the electrochemical behavior of 1 exhibits reversible in nature attributed to the ferrocene/ferrocenium cation.
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26
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Nath J, Tarai A, Baruah JB. Copper(II), Zinc(II), and Cadmium(II) Formylbenzoate Complexes: Reactivity and Emission Properties. ACS OMEGA 2019; 4:18444-18455. [PMID: 31720548 PMCID: PMC6844117 DOI: 10.1021/acsomega.9b02779] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 10/17/2019] [Indexed: 05/11/2023]
Abstract
Synthesis, characterization, reactivity, and sensing properties of 4-formylbenzoate complexes of copper(II), zinc(II), and cadmium(II) possessing the 1,10-phenanthroline ancillary ligand are studied. The crystal structures of the (1,10-phenanthroline)bis(4-formylbenzoate)(aqua)copper(II) and (1,10-phenanthroline)bis(4-formylbenzo-ate)zinc(II) and a novel molecular complex comprising an assembly of mononuclear and dinuclear species of (1,10-phenanthroline)bis(4-formylbenzoate)cadmium(II) are reported. These zinc and cadmium complexes are fluorescent; they show differentiable sensitivity to detect three positional isomers of nitroaniline. The mechanism of sensing of nitroanilines by 1,10-phenanthroline and the complexes are studied by fluorescence titrations, photoluminescence decay, and dynamic light scattering. A plausible mechanism showing that 1,10-phenanthroline ligand-based emission quenched by electron transfer from the excited state of 1,10-phenanthroline to nitroaniline is supported by density functional theory calculations. In an anticipation to generate a fluorescent d10-copper(I) formylbenzoate complex by a mild reducing agent such as hydroxylamine hydrochloride for similar sensing of nitroaromatics as that of the d10-zinc and cadmium 4-formylbenzoate complexes, reactivity of d9-copper(II) with hydroxylamine hydrochloride in the presence of 4-formylbenzoic acid and 1,10-phenanthroline is studied. It did not provide the expected copper(I) complex but resulted in stoichiometry-dependent reactions of 4-formylbenzoic acid with hydroxylamine hydrochloride in the presence of copper(II) acetate and 1,10-phenanthroline. Depending on the stoichiometry of reactants, an inclusion complex of bis(1,10-phenanthroline)(chloro)copper(II) chloride with in situ-formed 4-((hydroxyimino)methyl)benzoic acid or copper(II) 4-(hydroxycarbamoyl)benzoate complex was formed. The self-assembly of the inclusion complex has the bis(1,10-phenanthroline)(chloro)copper(II) cation encapsulated in hydrogen-bonded chloride-hydrate assembly with 4-((hydroxyimino)methyl)benzoic acid.
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27
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Kumar G, Pachisia S, Kumar P, Kumar V, Gupta R. Zn‐ and Cd‐based Coordination Polymers Offering H‐Bonding Cavities: Highly Selective Sensing of S
2
O
7
2−
and Fe
3+
Ions. Chem Asian J 2019; 14:4594-4600. [DOI: 10.1002/asia.201901142] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/28/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Gulshan Kumar
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Sanya Pachisia
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Pramod Kumar
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Vijay Kumar
- Department of ChemistryUniversity of Delhi Delhi 110007 India
| | - Rajeev Gupta
- Department of ChemistryUniversity of Delhi Delhi 110007 India
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28
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Experimental and theoretical exploration of sensing and magnetic properties of a triply bridged dicopper(II) complex: The first discrete metal complex to sense picric acid in pure water. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111987] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Kumar S, Arora A, Kaushal J, Oswal P, Kumar A, Kumar P. Developing a simple and water soluble thiophene-functionalized Ru(II)-polypyridyl complex for ferric ion detection. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.107500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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30
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Kumar V, Kumar P, Kumar S, Singhal D, Gupta R. Turn-On Fluorescent Sensors for the Selective Detection of Al 3+ (and Ga 3+) and PPi Ions. Inorg Chem 2019; 58:10364-10376. [PMID: 31342750 DOI: 10.1021/acs.inorgchem.9b01550] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rationally designed multiple hydroxyl-group-based chemosensors L1-L4 containing arene-based fluorophores are presented for the selective detection of Al3+ and Ga3+ ions. Changes in the absorption and emission spectra of L1-L4 in ethanol were easily observable upon the addition of Al3+ and Ga3+ ions. Competitive binding studies, detection limits, and binding constants illustrate significant sensing abilities of these chemosensors with L4, showing the best results. The interaction of Al3+/Ga3+ ions with chemosensor L4 was investigated by fluorescence lifetime measurements, whereas Job's plot, high-resolution mass spectrometry, and 1H NMR spectral titrations substantiated the stoichiometry between L4 and Al3+/Ga3+ ions. The solution-generated [L-M3+] species further detected pyrophosphate ion (PPi) by exhibiting emission enhancement and a visible color change. The binding of Al3+/Ga3+ ions with chemosensor L4 was further supported by density functional theory studies. Reversibility for the detection of Al3+/Ga3+ ions was achieved by utilizing a suitable proton source. The multiionic response, reversibility, and optical visualization of the present chemosensors make them ideal for practical applications for real samples, which have been illustrated by paper-strip as well as polystyrene film-based detection.
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Affiliation(s)
- Vijay Kumar
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
| | - Pramod Kumar
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
| | - Sushil Kumar
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
| | - Divya Singhal
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
| | - Rajeev Gupta
- Department of Chemistry , University of Delhi , New Delhi 110007 , India
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31
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Tang Q, Sun Y, Li HY, Wu JQ, Liang YN, Zhang Z. Hexanuclear 3d − 4f metal-organic cages assembled from a carboxylic acid-functionalized tris-triazamacrocycle for highly selective fluorescent sensing of picric acid. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4814] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Qi Tang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; School of Chemistry and Pharmacy of Guangxi Normal University; Guilin 541004 People's Republic of China
| | - Yao Sun
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; School of Chemistry and Pharmacy of Guangxi Normal University; Guilin 541004 People's Republic of China
| | - Hong-Yan Li
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; School of Chemistry and Pharmacy of Guangxi Normal University; Guilin 541004 People's Republic of China
| | - Ji-Qing Wu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; School of Chemistry and Pharmacy of Guangxi Normal University; Guilin 541004 People's Republic of China
| | - Yu-Ning Liang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; School of Chemistry and Pharmacy of Guangxi Normal University; Guilin 541004 People's Republic of China
| | - Zhong Zhang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources; School of Chemistry and Pharmacy of Guangxi Normal University; Guilin 541004 People's Republic of China
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32
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Ghosh TK, Jana S, Ghosh A. Exploitation of the Flexidentate Nature of a Ligand To Synthesize Zn(II) Complexes of Diverse Nuclearity and Their Use in Solid-State Naked Eye Detection and Aqueous Phase Sensing of 2,4,6-Trinitrophenol. Inorg Chem 2018; 57:15216-15228. [PMID: 30516050 DOI: 10.1021/acs.inorgchem.8b02497] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three Zn(II) complexes, [Zn2(HL)2(NO3)2]·H2O (1), [(Zn4L2)(μ3-OH)2](NO3)2·0.5H2O (2), and [(Zn6L2)( o-van)2(μ3-OCH3)2(μ3-OH)2](NO3)2 (3), have been synthesized by exploiting the flexidentate nature of a multidentate Schiff base ligand, H2L ( N, N'-bis(3-methoxysalicylidene)diethylenetriamine), by changing the reaction conditions and stoichiometry of the reactants. All three complexes are highly fluorescent in solution as well as in solid and have been used as luminescence sensors toward nitrophenol explosives in both the media. In aqueous/methanol medium, these complexes show very high selectivity and sensitivity with detection limit in ppb (2.03) or nM level (8.89 nM) for picric acid. The yellow color of all three Zn(II) complexes changes to red on mixing with small amount (∼5%) of picric acid in solid state, revealing the potential of these complexes for practical use in naked eye detection of 2,4,6-trinitrophenol (TNP) or picric acid in ambient light. In order to identify the host-guest interactions between Zn(II) complex and TNP, single crystals of the adduct of TNP with Zn(II) complex, [Zn2(HL)2(H2O)2][C6H2N3O7]2 (4), were grown. Its X-ray crystal structure reveals that two picrate ions are attached to a dinuclear host with the help of H-bonding and π···π interactions, throwing light into the quenching mechanism and selectivity of detection.
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Affiliation(s)
- Tanmoy Kumar Ghosh
- Department of Chemistry, University College of Science , University of Calcutta , 92, A.P.C. Road , Kolkata 700 009 , India
| | - Subrata Jana
- Department of Chemistry, University College of Science , University of Calcutta , 92, A.P.C. Road , Kolkata 700 009 , India
| | - Ashutosh Ghosh
- Department of Chemistry, University College of Science , University of Calcutta , 92, A.P.C. Road , Kolkata 700 009 , India
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33
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A highly selective sensor for Cu2+ and Fe3+ ions in aqueous medium: Spectroscopic, computational and cell imaging studies. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.07.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Gupta V, Mandal SK. Coordination driven self-assembly of [2 + 2 + 2] molecular squares: synthesis, crystal structures, catalytic and luminescence properties. Dalton Trans 2018; 47:9742-9754. [DOI: 10.1039/c8dt01367e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ten molecular squares were prepared through coordination-driven self-assembly and their catalytic activity and luminescence properties are reported.
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Affiliation(s)
- Vijay Gupta
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Mohali
- India
| | - Sanjay K. Mandal
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Mohali
- India
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35
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Kumar P, Kumar V, Pandey S, Gupta R. Detection of sulfide ion and gaseous H2S using a series of pyridine-2,6-dicarboxamide based scaffolds. Dalton Trans 2018; 47:9536-9545. [DOI: 10.1039/c8dt01351a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This work presents a series of pyridine-2,6-dicarboxamide based scaffolds with different appendages and their roles as chemosensors for the selective detection of S2− ion, as well as gaseous H2S, in primarily aqueous media.
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Affiliation(s)
- Pramod Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Vijay Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Saurabh Pandey
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
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