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Sambamoorthy S, Thamaraichelvan G, Karikalan A, Kumar SS. Heterocyclic fluorescent Schiff base chemosensors for the detection of Fe(III) and Cu(II) ions. LUMINESCENCE 2024; 39:e4739. [PMID: 38685743 DOI: 10.1002/bio.4739] [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: 11/07/2023] [Revised: 03/04/2024] [Accepted: 03/12/2024] [Indexed: 05/02/2024]
Abstract
Two new Schiff bases were synthesized from 1-(2,4-dihydroxyphenyl)ethanone and pyridine derivatives. Both compounds were characterized using infrared, UV-Vis., 1H NMR, 13C NMR and mass spectral studies. Density functional theory (DFT) calculations were performed for both the Schiff bases with 6-31G(d, p) as the basis set. Vibrational frequencies calculated using the theoretical method were in good agreement with the experimental values. Both the Schiff bases were highly fluorescent in nature. The cation-recognizing profile of the compounds was investigated in aqueous methanol medium. The Schiff base 4-(1-(pyridin-4-ylimino)ethyl)benzene-1,3-diol (PYEB) was found to interact with Fe(III) and Cu(II) ions, whereas the Schiff base 4,4'-((pyridine-2,3-diylbis(azanylylidene))bis(ethan-1-yl-1-ylidene))bis(benzene-1,3-diol) (PDEB) was found to detect Cu(II) ions. The mechanism of recognition was established as combined excited state intramolecular proton transfer (ESIPT)-chelation-enhanced fluorescence (CHEF) effect and chelation-enhanced quenching (CHEQ) process for the detection of Fe(III) and Cu(II) ions, respectively. The stability constant of the metal complexes formed during the sensing process was determined. The limit of detection for Fe(III) and Cu(II) ions with respect to Schiff base PYEB was found to be 1.64 × 10-6 and 2.16 × 10-7 M, respectively. With respect to Schiff base PDEB, the limit of detection for Cu(II) ion was found to be 4.54 × 10-4 M. The Cu(II) ion sensing property of the Schiff base PDEB was applied in bioimaging studies for the detection of HeLa cells.
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Affiliation(s)
- Santhi Sambamoorthy
- PG and Research Department of Chemistry, Seethalakshmi Ramaswami College, Affiliated to Bharathidasan University, Tiruchirappalli, India
| | - Geetha Thamaraichelvan
- PG and Research Department of Chemistry, Seethalakshmi Ramaswami College, Affiliated to Bharathidasan University, Tiruchirappalli, India
| | - Abinaya Karikalan
- PG and Research Department of Chemistry, Seethalakshmi Ramaswami College, Affiliated to Bharathidasan University, Tiruchirappalli, India
| | - Saranya Srinivasa Kumar
- PG and Research Department of Chemistry, Seethalakshmi Ramaswami College, Affiliated to Bharathidasan University, Tiruchirappalli, India
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2
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Sharma V, Savita S, Patra GK. A highly sensitive triazole-based perfectly water soluble novel bis-Schiff base reversible fluorescent-colorimetric chemosensor for fast detection of Pb 2+ ions. RSC Adv 2024; 14:3289-3303. [PMID: 38249676 PMCID: PMC10797601 DOI: 10.1039/d3ra06185j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 01/04/2024] [Indexed: 01/23/2024] Open
Abstract
A reversible fluorescent-colorimetric azino bis-Schiff base receptor for the detection of Pb2+ in aqueous medium has been developed for the first time. Receptor L exhibits an excellent selective and rapid fluorescent-colorimetric response towards Pb2+. The sensitivity of the fluorescent-based assay (0.53 nM) and colorimetric assay (1.0 nM) for Pb2+ is sufficiently good in comparison to previously reported literature. From 1H NMR data, Job plot measurement and the ESI-MS spectrum, a 1 : 2 stoichiometric complexation between L and Pb2+ has been established. Receptor L shows a remarkable detection ability in a wide pH range of 4-8 and it has been successfully utilised in the determination of Pb2+ in aqueous solution of bovine serum albumin protein and in real samples. The geometry of L has been optimized by both DFT studies and NMR, FTIR and mass spectra. Moreover, we have studied molecular docking of the probe L.
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Affiliation(s)
- Vanshika Sharma
- Department of Chemistry, Guru Ghasidas Vishwavidyalaya Bilaspur C.G. India +91 7587312992
| | - Sandhya Savita
- Department of Chemistry, Guru Ghasidas Vishwavidyalaya Bilaspur C.G. India +91 7587312992
| | - Goutam Kumar Patra
- Department of Chemistry, Guru Ghasidas Vishwavidyalaya Bilaspur C.G. India +91 7587312992
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3
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Niu X, He H, Ran H, Wu Z, Tang Y, Wu Y. Rapid colorimetric sensor for ultrasensitive and highly selective detection of Fumonisin B1 in cereal based on laccase-mimicking activity of silver phosphate nanoparticles. Food Chem 2023; 429:136903. [PMID: 37487390 DOI: 10.1016/j.foodchem.2023.136903] [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: 03/10/2023] [Revised: 06/26/2023] [Accepted: 07/03/2023] [Indexed: 07/26/2023]
Abstract
Ag3PO4 nanoparticles (NPs) was prepared through a facile coprecipitation method, and was first found to have excellent laccase-mimicking catalytic activity. The study confirms that Fumonisin B1 (FB1) can effectively hinder the production of superoxide anion (O2-) between Ag3PO4 NPs and dissolved oxygen, and further inhibit laccase-mimicking activity of Ag3PO4 NPs. Thus, a novel rapid colorimetric sensor for FB1 analysis in cereal was first established using laccase-mimicking activity as sensing signal. The absorbance variation of sensing solution is directly related to the amount of FB1, and the color change is further combined with smartphone for quantitively analysis of FB1. The limit of detection (LOD) of the sensor is determined as low as 1.73 μg·L-1, which is far lower than the maximum residue limits (MRLs) of FB1 set by European Commission and US Food and Drug Administration (FDA). The average recovery of 87.8-104.5% for FB1 detection was obtained in cereal.
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Affiliation(s)
- Xiaojuan Niu
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China; College of Life Sciences, Guizhou Normal University, Guiyang 550001, China
| | - Huanhuan He
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
| | - Hang Ran
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
| | - Zhen Wu
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China
| | - Yue Tang
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China
| | - Yuangen Wu
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China; Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
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Huang Y, Chen W, Dong M, Li N, Chen L, Ling L, Xu Q, Lin M, Xing Z. A novel fluorescence probe for the recognition of Cd 2+ and its application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 301:122979. [PMID: 37295381 DOI: 10.1016/j.saa.2023.122979] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/21/2023] [Accepted: 06/02/2023] [Indexed: 06/12/2023]
Abstract
A facile fluorescence probe BQBH was synthesized and investigated on its spectrum property. The result showed that the BQBH had high sensitivity and selectivity for Cd2+ with lowest detection determined as 0.14 μM by fluorescence response. The 1: 1 binding ratio between BQBH and Cd2+ was determined by Job's plot, and the binding details were further confirmed by 1H NMR titration, FT-IR spectrum and HRMS analysis. The applications including on test paper, smart phone and cell image were all also investigated.
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Affiliation(s)
- Yuntong Huang
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Weizhong Chen
- Department of Medical Laboratory, Chaozhou People's Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong 521000, China
| | - Mingyou Dong
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China; Modern Industrial College of Biomedicine and Great Health, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Nana Li
- Department of Chemistry, Xinzhou Teachers University, Xinzhou, Shanxi 034000, China
| | - Lianghui Chen
- Modern Industrial College of Biomedicine and Great Health, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Li Ling
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Qijiang Xu
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China; Modern Industrial College of Biomedicine and Great Health, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China.
| | - Min Lin
- Department of Medical Laboratory, Chaozhou People's Hospital Affiliated to Shantou University Medical College, Chaozhou, Guangdong 521000, China
| | - Zhiyong Xing
- School of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China; Modern Industrial College of Biomedicine and Great Health, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China.
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Liu Q, Li S, Wang Y, Yang L, Yue M, Liu Y, Ye F, Fu Y. Sensitive fluorescence assay for the detection of glyphosate with NACCu 2+ complex. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 882:163548. [PMID: 37080305 DOI: 10.1016/j.scitotenv.2023.163548] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 04/11/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Glyphosate is widely used as an herbicide in weed control. However, the excessive use and residue of glyphosate adversely affect the environment. Thus, a rapid and highly sensitive system must be developed for glyphosate detection. Herein, a novel turn-on fluorescent probe was designed and synthesized for glyphosate, that is N-butyl-1,8-naphthalimide-4-hydrazino-6-isopropyl-chromone (NAC). The fluorescence of NAC was quenched by the addition of Cu2+ to form NACCu2+ complex in dimethyl sulfoxide/2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid (DMSO/HEPES, 9/1, v/v, pH = 7.0). Upon the addition of glyphosate, the fluorescence of NACCu2+ was recovered through chelation between Cu2+ and glyphosate. The NACCu2+ complex exhibited the desired linearity of glyphosate concentration under optimum conditions in the range of 0-40 μM with a low detection limit of 36 nM. Based on competitive coordination, NACCu2+ exhibited good sensitivity and selectivity for glyphosate. Moreover, NAC was successfully utilized to detect glyphosate in tap water, local water from Songhua River, soil, maize, and soybean with convenient operations, indicating a promising application in pesticide residue detection.
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Affiliation(s)
- Qiuhuan Liu
- College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, PR China
| | - Shijie Li
- College of Life Science, Northeast Agricultural University, Harbin 150030, PR China
| | - Yujiong Wang
- College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, PR China
| | - Liu Yang
- College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, PR China
| | - Mingli Yue
- College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, PR China
| | - Yulong Liu
- College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, PR China
| | - Fei Ye
- College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, PR China
| | - Ying Fu
- College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, PR China.
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6
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Pyrene derived imine functionalized moiety for highly selective colorimetric detection of Cu2+ ion real time sample with supportive DFT studies. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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7
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Sharma S, Chayawan, Jayaraman A, Debnath J, Sundar Ghosh K. 2-hydroxy-naphthalene hydrazone based dual-functional chemosensor for ultrasensitive colorimetric detection of Cu2+ and highly selective fluorescence sensing and bioimaging of Al3+. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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8
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Kim D, Kim G, Han J, Jung O. Advances in
2D
coordination networks for single‐crystal‐to‐single crystal applications beyond confined pores. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Dongwon Kim
- Department of Chemistry Pusan National University Pusan Korea
| | - Gyeongwoo Kim
- Department of Chemistry Pusan National University Pusan Korea
| | - Jihun Han
- Department of Chemistry Pusan National University Pusan Korea
| | - Ok‐Sang Jung
- Department of Chemistry Pusan National University Pusan Korea
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Kumar A, Virender, Mohan B, Solovev AA, Saini M, Kumar Sharma H. Development of 2-Hydroxy-Naphthaldehyde Functionalized Schiff Base Chemosensor for Spectroscopic and Colorimetric Detection of Cu2+ and Pd2+ ions. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107561] [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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10
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Bhalla P, Tomer N, Bhagat P, Malhotra R. Chromone functionalized pyridine chemosensor for cupric ions detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 264:120279. [PMID: 34438118 DOI: 10.1016/j.saa.2021.120279] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/04/2021] [Accepted: 08/10/2021] [Indexed: 06/13/2023]
Abstract
A new Schiff base 2-ethoxy-3-{[(6-{[(2-ethoxy-4-hydroxy-2H-chromen-3-yl)methylidene]amino}pyridine-2-yl)imino]methyl}-2H-chromen-4-ol (CD) was synthesized as a result of the condensation of 2,6-diaminopyridine and 3-formyl chromone in 1:2 M ratio and used for cupric ions detection and characterized through FTIR, HRMS and 1H NMR spectral techniques. The sensing capability of Schiff base for cupric ions as compared to other transition metal ions was examined by absorbance and emission studies. A considerable decrease in emission intensity appeared in Schiff base in the case of cupric ions while irrelevant changes were examined for the rest of the ions. The binding stoichiometry was obtained as 1:2 for CD: Cu2+ complex intended from the job's plot which was confirmed through HRMS spectral technique. DFT calculations were carried for the confirmation of structural relationships and absorption-emission data. The Regression coefficient, Limit of detection, and Association constant were obtained as 98.7%, 1.2 × 10-6 M, and 3.26 × 104 M-1 respectively using Benesi-Hildebrand (B-H) equation. The sensing power of Schiff base CD to recognize cupric ions was unaltered by the addition of the rest of metal ions, which was authenticated through interference studies. Schiff base CD and its complex with cupric ions were found stable over an extensive time period as revealed by time-reliant studies. The data collected by pH studies revealed that the preferred pH range for detecting cupric ions by Schiff base CD was 6 to 11. The Schiff base was finally utilized for sensing cupric ions in a variety of spiked samples of water like canal water, tap water, groundwater, distilled water.
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Affiliation(s)
- Parul Bhalla
- Department of Chemistry, Guru Jambheshwar University of Science and Technology, Hisar 125001, India
| | - Nisha Tomer
- Department of Chemistry, Guru Jambheshwar University of Science and Technology, Hisar 125001, India
| | - Pooja Bhagat
- Department of Chemistry, AND College, University of Delhi, Kalkaji, New Delhi 110019, India
| | - Rajesh Malhotra
- Department of Chemistry, Guru Jambheshwar University of Science and Technology, Hisar 125001, India.
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11
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Sun F, Yang L, Li S, Wang Y, Wang L, Li P, Ye F, Fu Y. New Fluorescent Probes for the Sensitive Determination of Glyphosate in Food and Environmental Samples. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:12661-12673. [PMID: 34672544 DOI: 10.1021/acs.jafc.1c05246] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this paper, a dual-functional probe, 2-(benzothiazol)-4-(3-hydroxy-4-methylphenyl) imino phenol (BHMH), was synthesized and characterized for the simultaneous detection of Cu2+ and Fe3+ in dimethyl sulfoxide/4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (DMSO/HEPES) (1:4, v/v, pH = 6.0). The limits of detections (LODs) for Cu2+ and Fe3+ were 9.05 and 48 nM, respectively. Based on the competitive coordination, the complex BHMH-Cu2+/Fe3+ exhibited good sensitivity and selectivity for glyphosate. The LODs of BHMH-Cu2+ and BHMH-Fe3+ for glyphosate were 0.41 and 0.63 μM, respectively. The probe quantitatively detected glyphosate in tap water, Songhua River water, local water and soil, and food samples. The colorimetric on-site glyphosate sensing through the probe BHMH-Cu2+ was also studied based on smartphones. BHMH and BHMH-Cu2+/Fe3+ exhibited outstanding imaging capabilities for Cu2+, Fe3+, and glyphosate in living cells with low cytotoxicity, especially the first time for glyphosate.
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Affiliation(s)
- Fang Sun
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Liu Yang
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Shijie Li
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yubo Wang
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Ludi Wang
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Ping Li
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Fei Ye
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Ying Fu
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin 150030, People's Republic of China
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Özdemir Ö. A new 2-hydroxynaphthalene based Schiff base receptor for detection of Cu2+, Fe3+, HSO4−, CN− ions and D–amino acids in aqueous DMSO solution. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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13
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A chromone based Schiff base: An efficient colorimetric sensor for specific detection of Cu (II) ion in real water samples. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129549] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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14
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Implementation of biomolecular logic gate using DNA and electrically doped GaAs nano-pore: a first principle paradigm. J Mol Model 2021; 27:23. [PMID: 33410979 DOI: 10.1007/s00894-020-04623-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 11/26/2020] [Indexed: 12/16/2022]
Abstract
One of the emerging areas of today's research arena is molecular modeling and molecular computing. The molecular logic gate can be theoretically implemented from single-strand DNA which consists of four basic nucleobases. In this study, the electronic transmission characteristics of DNA chain are investigated to form the logic gate. This biomolecular single-strand DNA chain is passed through an electrically doped gallium-arsenide nano-pore to achieve reasonably improved transmission along <1 1 1> direction. Current-voltage characteristic and device density of states with HOMO-LUMO plot of the device are explained along with the conductivity of the device to confirm the characteristics of some important logic gates like a universal gate. Ultimately the property of resistivity proves the law of Boolean logic of AND gate and universal logic gate, viz., NAND and NOR gate. All the electronic properties of the Boolean logic gate are explored based on the first principle approach by non-equilibrium Green's function coupled with density functional theory in room temperature.
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Onça LO, de Souza JCP, Dos Santos IGN, Santos EDS, Soares SM, Diniz PHGD. A new highly selective colorimetric Schiff base chemosensor for determining the copper content in artisanal cachaças. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 243:118783. [PMID: 32818693 DOI: 10.1016/j.saa.2020.118783] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/18/2020] [Accepted: 07/19/2020] [Indexed: 06/11/2023]
Abstract
This work demonstrated the feasibility of applying the Schiff base 5-bromo-2-salicyl-beta-alanine as a colorimetric chemosensor for the spectrophotometric quantification of the copper content in artisanal cachaças. For this, the experimental conditions were optimized to obtain an efficient, sensitive, reversible, and highly selective chemosensor to Cu2+ ions. The complex stoichiometry was 1:1, with a formation constant of 5.82 × 102 L mol-1 and molar absorptivity of 5.82 × 103 mol L-1 cm-1. Then, a spectrophotometric analytical method was developed and validated according to the Brazilian legislation. The linearity of the analytical curve was demonstrated by ANOVA, at a confidence level of 95%. The limits of detection and quantification were 0.0659 and 0.200 mg L-1, respectively. The coefficients of variation for both the intra- and inter-day precisions were lower than 3.83%, and the accuracy presented a mean recovery of 100.55 ± 2.87%. The absence of a matrix effect was confirmed by the standard addition method, and the copper content in three artisanal cachaças from different geographical origins was estimated as lower than 2.93 mg L-1. This result was in accordance with the Brazilian legislation but reinforces the need to carry out stricter quality control to achieve exportation standards. Therefore, the proposed method can be considered a simple, selective, linear, precise, and accurate tool that involves only a simple complexation reaction through the addition of the chemosensor solution in a buffered medium. As a consequence, the simplicity, practicality, rapidity, and low cost of synthesis of the proposed Schiff base chemosensor are highlighted.
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Affiliation(s)
- Larissa Oliveira Onça
- Programa de Pós-Graduação em Química Pura e Aplicada (POSQUIPA), Centro das Ciências Exatas e das Tecnologias (CCET), Universidade Federal do Oeste da Bahia (UFOB), 47.810-059 Barreiras, BA, Brazil
| | - Joseana Caroline Palmeira de Souza
- Undergraduate Course of Chemistry, Centro das Ciências Exatas e das Tecnologias (CCET), Universidade Federal do Oeste da Bahia (UFOB), 47.810-059 Barreiras, BA, Brazil
| | - Izabela Gessyane Nogueira Dos Santos
- Undergraduate Course of Chemistry, Centro das Ciências Exatas e das Tecnologias (CCET), Universidade Federal do Oeste da Bahia (UFOB), 47.810-059 Barreiras, BA, Brazil
| | - Emerson de Sousa Santos
- Undergraduate Course of Chemistry, Centro das Ciências Exatas e das Tecnologias (CCET), Universidade Federal do Oeste da Bahia (UFOB), 47.810-059 Barreiras, BA, Brazil
| | - Sérgio Macêdo Soares
- Programa de Pós-Graduação em Química Pura e Aplicada (POSQUIPA), Centro das Ciências Exatas e das Tecnologias (CCET), Universidade Federal do Oeste da Bahia (UFOB), 47.810-059 Barreiras, BA, Brazil
| | - Paulo Henrique Gonçalves Dias Diniz
- Programa de Pós-Graduação em Química Pura e Aplicada (POSQUIPA), Centro das Ciências Exatas e das Tecnologias (CCET), Universidade Federal do Oeste da Bahia (UFOB), 47.810-059 Barreiras, BA, Brazil.
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16
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Chakraborty S, Ravindran V, Nidheesh PV, Rayalu S. Optical Sensing of Copper and Its Removal by Different Environmental Technologies. ChemistrySelect 2020. [DOI: 10.1002/slct.202002113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shampa Chakraborty
- CSIR-National Environmental Engineering Research Institute Nagpur Maharashtra India
| | - Vyshakh Ravindran
- CSIR-National Environmental Engineering Research Institute Nagpur Maharashtra India
| | - P. V. Nidheesh
- CSIR-National Environmental Engineering Research Institute Nagpur Maharashtra India
| | - Sadhana Rayalu
- CSIR-National Environmental Engineering Research Institute Nagpur Maharashtra India
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