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Han Y, Kong X, Bao R, Yi J, Liu L, Gu Y, Yi L. Synthesis of high quantum yield rhenium-doped carbonized polymer dots for dual sensing of Fe 3+ and Mo 6+ and anti-counterfeit ink applications. Talanta 2023; 265:124913. [PMID: 37451120 DOI: 10.1016/j.talanta.2023.124913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/28/2023] [Accepted: 07/02/2023] [Indexed: 07/18/2023]
Abstract
The bottom-up approach serves as an efficacious and noteworthy method for the synthesis of carbonized polymer dots (CPDs). In the present investigation, rhenium-doped CPDs (Re-CPDs) were successfully synthesized via a hydrothermal technique employing citric acid, urea, and NH4ReO4. Subsequent to a comprehensive series of characterizations, Re-CPDs demonstrated an average particle size of 2.67 nm, excitation/emission maxima of 377/461 nm, and an elevated quantum yield of 45.36% at 377 nm excitation. Through the selectivity analysis involving various metal ions, Re-CPDs displayed sensitivity towards Fe3+ and Mo6+ ions, with limits of detection (LODs) of 0.02 μM and 0.48 μM, respectively. Furthermore, Re-CPDs exhibited multi-chromatic fluorescence (450-550 nm) under excitation wavelengths (375-430 nm). As a result, by amalgamating Re-CPDs with sucrose, detection patterns capable of generating multi-chromatic fluorescence at excitation wavelengths of 375, 395, and 430 nm, respectively, were successfully devised. In summary, Re-CPDs hold considerable potential as a material for the detection of Fe3+ and Mo6+ ions, as well as for anti-counterfeiting ink applications.
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Affiliation(s)
- Yushu Han
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Xin Kong
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
| | - Rui Bao
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
| | - Jianhong Yi
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
| | - Liang Liu
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Ying Gu
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Lunzhao Yi
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
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Halko R, Hagarová I, Andruch V. Innovative approaches in cloud-point extraction. J Chromatogr A 2023; 1701:464053. [PMID: 37207414 DOI: 10.1016/j.chroma.2023.464053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/05/2023] [Accepted: 05/07/2023] [Indexed: 05/21/2023]
Abstract
Cloud-point extraction (CPE) is a pre-treatment technique for the extraction and preconcentration of different chemical compounds, such as metal ions, pesticides, drugs, phenols, vitamins etc., from various samples. CPE is based on the phenomenon of two phases (micellar and aqueous) forming after the heating of an aqueous isotropic solution of a non-ionic or zwitterionic surfactant above the cloud-point temperature. If analytes are added to the surfactant solution under suitable conditions, they should be extracted into the micellar phase, also called the surfactant-rich phase. Recently, the traditional CPE procedure is being increasingly replaced by improved CPE procedures. In this study, recent advances in CPE over the last three years (2020 - 2022), including the application of various innovative approaches, are reviewed. In addition to the basic principle of CPE, alternative extraction media in CPE, CPE supported by various auxiliary energies, a different modified CPE procedure and the use nanomaterials and solid-phase extraction in combination with CPE are presented and discussed. Finally, some future trends for improved CPE are presented.
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Affiliation(s)
- Radoslav Halko
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava IV, Slovak Republic.
| | - Ingrid Hagarová
- Institute of Laboratory Research on Geomaterials, Faculty of Natural Sciences, Comenius University Bratislava, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava IV, Slovak Republic
| | - Vasil Andruch
- Department of Analytical Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Košice 041 80, Slovak Republic
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Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction–Spectrophotometric Determination of Cobalt. Molecules 2022; 27:molecules27154725. [PMID: 35897901 PMCID: PMC9332315 DOI: 10.3390/molecules27154725] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 11/25/2022] Open
Abstract
The hydrophobic azo dye 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR, H2L) was studied as part of a system for the centrifuge-less cloud point extraction (CL-CPE) and spectrophotometric determination of traces of cobalt. The extracted 1:2 (Co:HTAR) complex, [CoIII(HL−)(L2−)]0, shows an absorption maximum at 553 nm and contains HTAR in two different acid–base forms. Optimum conditions for its formation and CL-CPE were found as follows: 1 × 10−5 mol L−1 of HTAR, 1.64% of Triton X-114, pH of 7.8, incubation time of 20 min at ca. 50 °C, and cooling time of 30 min at ca. −20 °C. The linear range, limit of detection, and apparent molar absorptivity coefficient were 5.4–189 ng mL−1, 1.64 ng mL−1, and 2.63 × 105 L mol−1 cm−1, respectively. The developed procedure does not use any organic solvents and can be described as simple, cheap, sensitive, convenient, and environmentally friendly. It was successfully applied to the analysis of artificial mixtures and real samples, such as steel, dental alloy, rainwater, ampoules of vitamin B12, and saline solution for intravenous infusion.
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Snigur D, Duboviy V, Barbalat D, Zhukovetska O, Chebotarev A, Bevziuk K. A rapid room-temperature cloud point extraction for spectrophotometric determination of Copper (II) with 6,7-dihydroxy-2,4-diphenylbenzopyrylium chloride. ANAL SCI 2022; 38:949-954. [PMID: 35587860 DOI: 10.1007/s44211-022-00116-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 04/11/2022] [Indexed: 12/01/2022]
Abstract
The conditions for the surfactant rich phase of Triton X-100 formation and the extraction of Copper (II) as a complex with 6,7-dihydroxy-2,4-diphenylbenzopyrylium chloride at room temperature have been optimized. It was shown that the sodium salt of p-toluic acid can be used as a chemical initiator of cloud point extraction. The optimal conditions for room temperature cloud point extraction were found to be: pH 5.0; 1 v/v.% Triton X-100; 3.75·10-2 M sodium salt of p-toluic acid and the addition of 0.5 M H2SO4 solution to pH 5.0. The formation of the surfactant rich phase begins instantly. The 2-propanol was proposed as a diluent for the surfactant rich phase. The calibration graph is linear in the range of Copper (II) concentrations of 6-870 μg/L, and the limit of detection and limit of determination are 1.8 and 6 μg/L, respectively. The proposed method was successfully applied for the spectrophotometric determination of Copper (II) in water samples with a relative standard deviation not exceeding 4.5%.
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Affiliation(s)
- Denys Snigur
- Department of Analytical and Toxicological Chemistry, Odessa I.I. Mechnikov National University, Odesa, 65082, Ukraine.
| | - Vitaliy Duboviy
- Department of Analytical and Toxicological Chemistry, Odessa I.I. Mechnikov National University, Odesa, 65082, Ukraine
| | - Dmytro Barbalat
- Department of Analytical and Toxicological Chemistry, Odessa I.I. Mechnikov National University, Odesa, 65082, Ukraine
| | - Olena Zhukovetska
- Department of Analytical and Toxicological Chemistry, Odessa I.I. Mechnikov National University, Odesa, 65082, Ukraine
| | - Alexandr Chebotarev
- Department of Analytical and Toxicological Chemistry, Odessa I.I. Mechnikov National University, Odesa, 65082, Ukraine
| | - Kateryna Bevziuk
- Department of Analytical and Toxicological Chemistry, Odessa I.I. Mechnikov National University, Odesa, 65082, Ukraine
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Fizer M, Fizer O, Barbalat D, Shishkina S, Snigur D. Structural peculiarities of new benzopyrylium dyes: X-ray, FT-IR, and DFT complex study. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132178] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Divarova VV, Saravanska A, Toncheva G, Milcheva N, Delchev VB, Gavazov K. Spectrophotometric Determination of Molybdenum(VI) as a Ternary Complex with 4-Nitrocatechol and Benzalkonium Chloride. Molecules 2022; 27:1217. [PMID: 35209004 PMCID: PMC8879126 DOI: 10.3390/molecules27041217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/04/2022] [Accepted: 02/09/2022] [Indexed: 01/06/2023] Open
Abstract
A new liquid-liquid extraction system for molybdenum(VI) was studied. It contains 4-nitrocatechol (4NC) as a complexing chromogenic reagent and benzalkonium chloride (BZC) as a source of heavy cations (BZ+), which are prone to form chloroform-extractable ion-association complexes. The optimum conditions for the determination of trace molybdenum(VI) were found: concentrations of 4NC and BZC (7.5 × 10-4 mol dm-3 and 1.9 × 10-4 mol dm-3, respectively), acidity (3.75 × 10-2 mol dm-3 H2SO4), extraction time (3 min), and wavelength (439 nm). The molar absorptivity, limit of detection, and linear working range were 5.5 × 104 dm3 mol-1 cm-1, 5.6 ng cm-3, and 18.6-3100 μg cm-3, respectively. The effect of foreign ions was examined, and the developed procedure was applied to the analysis of synthetic mixtures and real samples (potable waters and steels). The composition of the extracted complex was 1:1:2 (Mo:4NC:BZ). Three possible structures of its anionic part [MoVI(4NC)O2(OH)2]2- were discussed based on optimizations at the B3LYP/3-21G level of theory, and simulated UV/Vis absorption spectra were obtained with the TD Hamiltonian.
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Affiliation(s)
- Vidka V. Divarova
- Department of Chemical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 120 Buxton Bros Str., 4004 Plovdiv, Bulgaria; (V.V.D.); (A.S.); (N.M.)
| | - Antoaneta Saravanska
- Department of Chemical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 120 Buxton Bros Str., 4004 Plovdiv, Bulgaria; (V.V.D.); (A.S.); (N.M.)
| | - Galya Toncheva
- Faculty of Chemistry, University of Plovdiv ‘Paisii Hilendarskii’, 24 Tsar Assen St., 4004 Plovdiv, Bulgaria; (G.T.); (V.B.D.)
| | - Nikolina Milcheva
- Department of Chemical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 120 Buxton Bros Str., 4004 Plovdiv, Bulgaria; (V.V.D.); (A.S.); (N.M.)
| | - Vassil B. Delchev
- Faculty of Chemistry, University of Plovdiv ‘Paisii Hilendarskii’, 24 Tsar Assen St., 4004 Plovdiv, Bulgaria; (G.T.); (V.B.D.)
| | - Kiril Gavazov
- Department of Chemical Sciences, Faculty of Pharmacy, Medical University of Plovdiv, 120 Buxton Bros Str., 4004 Plovdiv, Bulgaria; (V.V.D.); (A.S.); (N.M.)
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Vosough M, Khayati GR, Sharafi S. Ammonia leaching of MoO3 concentrate: finding the reaction mechanism and kinetics analysis. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02098-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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