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Badea GE, Fodor A, Petrehele AIG, Maior I, Toderaș M, Morgovan CM. Evaluation of Phosphopolyoxometalates with Mixed Addenda (Mo, W, V) as Corrosion Inhibitors for Steels. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7600. [PMID: 38138742 PMCID: PMC10745015 DOI: 10.3390/ma16247600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 11/28/2023] [Accepted: 12/08/2023] [Indexed: 12/24/2023]
Abstract
Nowadays, choosing a corrosion inhibitor is not only based on efficiency, but must also consider the toxicity of the compound, the impact on the environment, and, obviously, the regulations in the field. In the last two decades, a special class of substances has begun to be studied, namely polyoxometalates (POMs). Their electronic properties and redox characteristics make the polyoxometalates potential candidates to be used in many electrochemical processes, and as potential corrosion inhibitors. Electrochemical methods such as a Tafel extrapolation plot, chronopotentiometry, or gravimetry have been used to establish the capacity of corrosion inhibition of S235 and SS304 steels in the presence of phosphovanadomolibdate acid (@PMoV) and phosphovanadotungstate acid (@PWV) in 0.5 M sulphuric acid solution. The inhibition efficiency for S235 steel is about 90.6% for @PMoV, and 69.5% for @PWV after 24 h of immersion. In the case of SS304 steel, polyoxometalates have similar effects: the inhibition degree, as a function of Flade potential, is 4.66 for @PMoV; better than 3.26 for @PWV, with both proving the passivant effect.
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Affiliation(s)
- Gabriela Elena Badea
- Department of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, Romania; (G.E.B.); (A.F.); (A.I.G.P.); (C.M.M.)
| | - Alexandrina Fodor
- Department of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, Romania; (G.E.B.); (A.F.); (A.I.G.P.); (C.M.M.)
| | - Anda Ioana Grațiela Petrehele
- Department of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, Romania; (G.E.B.); (A.F.); (A.I.G.P.); (C.M.M.)
| | - Ioana Maior
- Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Monica Toderaș
- Department of Physics, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, Romania
| | - Claudia Mona Morgovan
- Department of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 Universitatii Str., 410087 Oradea, Romania; (G.E.B.); (A.F.); (A.I.G.P.); (C.M.M.)
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Talukdar H, Saikia G, Das A, Sultana SY, Islam NS. Organic-Solvent-Free Oxidation of Styrene, Phenol and Sulfides with H2O2 over Eco-Friendly Niobium and Tantalum Based Heterogeneous Catalysts. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.01.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Molybdenum, Vanadium, and Tungsten-Based Catalysts for Sustainable (ep)Oxidation. Molecules 2022; 27:molecules27186011. [PMID: 36144747 PMCID: PMC9504910 DOI: 10.3390/molecules27186011] [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: 08/06/2022] [Revised: 08/26/2022] [Accepted: 09/08/2022] [Indexed: 11/17/2022] Open
Abstract
This article gives an overview of the research activity of the LAC2 team at LCC developed at Castres in the field of sustainable chemistry with an emphasis on the collaboration with a research team from the University of Zagreb, Faculty of Science, Croatia. The work is situated within the context of sustainable chemistry for the development of catalytic processes. Those processes imply molecular complexes containing oxido-molybdenum, -vanadium, -tungsten or simple polyoxometalates (POMs) as catalysts for organic solvent-free epoxidation. The studies considered first the influence of the nature of complexes (and related ligands) on the reactivity (assessing mechanisms through DFT calculations) with model substrates. From those model processes, the work has been enlarged to the valorization of biomass resources. A part concerns the activity on vanadium chemistry and the final part concerns the use of POMs as catalysts, from molecular to grafted catalysts, (ep)oxidizing substrates from fossil and biomass resources.
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Molybdenum-, Vanadium-, and Tungsten-Containing Materials for Catalytic Applications. MATERIALS 2022; 15:ma15051720. [PMID: 35268950 PMCID: PMC8911054 DOI: 10.3390/ma15051720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 02/23/2022] [Indexed: 02/04/2023]
Abstract
As chemists, we are still fascinated by the magic of nature [...]
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Heydari N, Bikas R, Shaterian M, Lis T. Green solvent free epoxidation of olefins by a heterogenised hydrazone-dioxidotungsten(vi) coordination compound. RSC Adv 2022; 12:4813-4827. [PMID: 35425511 PMCID: PMC8981271 DOI: 10.1039/d1ra09217k] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/27/2022] [Indexed: 12/19/2022] Open
Abstract
A new mononuclear tungsten coordination compound, [WO2L(CH3OH)] (1), was synthesized by the reaction of WCl6 and H2L (H2L = (E)-4-amino-N′-(5-bromo-2-hydroxybenzylidene)benzohydrazide) in methanol. Both the H2L and compound 1 were characterized by elemental analysis and UV-Vis, FT-IR and NMR spectroscopic methods. The molecular structure of compound 1 was also determined by single crystal X-ray analysis which confirmed the compound is a mononuclear coordination compound of cis-dioxidotungsten(vi) containing a free amine functionality on the ligand. Compound 1 was supported on propionyl chloride-functionalized silica gel by amidification reaction to obtain a heterogeneous catalyst. The obtained heterogeneous catalyst was characterized by FT-IR spectroscopy, thermal gravimetric analysis (TGA), diffuse-reflectance spectroscopy (DRS), X-ray diffraction analysis (XRD), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) and its catalytic activity was investigated in the epoxidation of olefins with hydrogen peroxide under solvent free conditions. The catalyst was successfully recovered several times and the recovered catalyst was also characterized by various methods including FT-IR, DRS, TGA, SEM and EDX analyses. The results indicated this heterogeneous catalytic system is an effective and selective catalyst for epoxidation of olefins and can be reused several times without significant change in its catalytic activity. In this study the solvent free catalytic oxidation of olefins by a new silica supported hydrazone-dioxidotungsten(vi) coordination compound is investigated.![]()
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Affiliation(s)
- Neda Heydari
- Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791, Zanjan, Iran
| | - Rahman Bikas
- Department of Chemistry, Faculty of Science, Imam Khomeini International University, 34148-96818, Qazvin, Iran
| | - Maryam Shaterian
- Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791, Zanjan, Iran
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, Wroclaw 50-383, Poland
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Sultana SY, Talukdar H, Borah BJ, Sharma M, Islam NS. Synthesis, structure and catalytic activity of new oxovanadium(V) complexes with deferiprone and N,N-donor ligands. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Talukdar H, Gogoi SR, Saikia G, Sultana SY, Ahmed K, Islam NS. A sustainable approach towards solventless organic oxidations catalyzed by polymer immobilized Nb(V)-peroxido compounds with H2O2 as oxidant. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wang Y, Gayet F, Daran JC, Guillo P, Agustin D. Replacement of Volatile Acetic Acid by Solid SiO 2@COOH Silica (Nano)Beads for (Ep)Oxidation Using Mn and Fe Complexes Containing BPMEN Ligand. Molecules 2021; 26:5435. [PMID: 34576906 PMCID: PMC8470966 DOI: 10.3390/molecules26185435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 11/30/2022] Open
Abstract
Mn and Fe BPMEN complexes showed excellent reactivity in catalytic oxidation with an excess of co-reagent (CH3COOH). In the straight line of a cleaner catalytic system, volatile acetic acid was replaced by SiO2 (nano)particles with two different sizes to which pending carboxylic functions were added (SiO2@COOH). The SiO2@COOH beads were obtained by the functionalization of SiO2 with pending nitrile functions (SiO2@CN) followed by CN hydrolysis. All complexes and silica beads were characterized by NMR, infrared, DLS, TEM, X-ray diffraction. The replacement of CH3COOH by SiO2@COOH (100 times less on molar ratio) has been evaluated for (ep)oxidation on several substrates (cyclooctene, cyclohexene, cyclohexanol) and discussed in terms of activity and green metrics.
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Affiliation(s)
- Yun Wang
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, Route de Narbonne, F-31077 Toulouse, France; (Y.W.); (F.G.); (J.-C.D.)
- Département de Chimie, Institut Universitaire de Technologie Paul Sabatier, Université de Toulouse, Av. Georges Pompidou, BP 20258, CEDEX, F-81104 Castres, France
| | - Florence Gayet
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, Route de Narbonne, F-31077 Toulouse, France; (Y.W.); (F.G.); (J.-C.D.)
- INPT, École Nationale Supérieure des Ingénieurs en Arts Chimiques et Technologiques, CS 44362, CEDEX 4, F-31030 Toulouse, France
| | - Jean-Claude Daran
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, Route de Narbonne, F-31077 Toulouse, France; (Y.W.); (F.G.); (J.-C.D.)
| | - Pascal Guillo
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, Route de Narbonne, F-31077 Toulouse, France; (Y.W.); (F.G.); (J.-C.D.)
- Département de Chimie, Institut Universitaire de Technologie Paul Sabatier, Université de Toulouse, Av. Georges Pompidou, BP 20258, CEDEX, F-81104 Castres, France
| | - Dominique Agustin
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, Route de Narbonne, F-31077 Toulouse, France; (Y.W.); (F.G.); (J.-C.D.)
- Département de Chimie, Institut Universitaire de Technologie Paul Sabatier, Université de Toulouse, Av. Georges Pompidou, BP 20258, CEDEX, F-81104 Castres, France
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Liu H, Zhuo Z, Zhang Y, Wei H, Zhang W, Li T, Mao Z, Wang W. Ligand coordination sphere effect of Schiff base
cis
‐dioxomolybdenum(VI) complexes in selective catalytic oxidation of alcohols. INT J CHEM KINET 2021. [DOI: 10.1002/kin.21530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Haiwen Liu
- School of Chemistry and Material Science Ludong University Yantai China
| | - Zihan Zhuo
- School of Chemistry and Material Science Ludong University Yantai China
| | - Yan Zhang
- School of Chemistry and Material Science Ludong University Yantai China
| | - Hang Wei
- School of Chemistry and Material Science Ludong University Yantai China
| | - Wenxin Zhang
- School of Chemistry and Material Science Ludong University Yantai China
| | - Tong Li
- School of Chemistry and Material Science Ludong University Yantai China
| | - Zuodong Mao
- School of Chemistry and Material Science Ludong University Yantai China
| | - Weili Wang
- School of Chemistry and Material Science Ludong University Yantai China
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Pseudohomogeneous metallic catalyst based on tungstate-decorated amphiphilic carbon quantum dots for selective oxidative scission of alkenes to aldehyde. Sci Rep 2021; 11:4411. [PMID: 33627721 PMCID: PMC7904908 DOI: 10.1038/s41598-021-83863-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 02/09/2021] [Indexed: 12/14/2022] Open
Abstract
Herein, we present an interesting role of tungstate-decorated amphiphilic carbon quantum dots (A-CQDs/W) in the selective oxidative cleavage of alkenes to aldehydes. In this work, for the first time, we disclose an unprecedented tungstate-based oxidative system incorporating A-CQDs as a bridge to the homogeneous catalyst for selective and efficient cleavage of a wide substrate scope of alkenes into aldehydes. The A-CQDs/W were synthesized via a one-step hydrothermal synthesis approach using 1-aminopropyl-3-methyl-imidazolium chloride and stearic acid for the surface modification, following by anion-exchange to immobilize WO4-2 to A-CQDs. The A-CQDs/W act as a pseudohomogeneous metallic catalyst (PMC) for selective oxidative scission of alkenes under phase transfer catalysts (PTC) free condition without over oxidation to acids, using water and H2O2 as a green oxidant. Thanks to the sub-nanometric size and novel engineered chemical structure, this PMC and reactants are in the same phase, besides they can be easily isolated from each other by extraction processes. The synthesized PMC exhibited excellent solubility and stability in various solvents. Interestingly, the system's high conversion efficiency was preserved even after eight catalytic cycles indicating the recyclability of the synthesized PMC. We believe that this study provides a significant and conceptually novel advance in oxidative cleavage chemistry.
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Nunes MS, Neves P, Gomes AC, Cunha-Silva L, Lopes AD, Valente AA, Pillinger M, Gonçalves IS. A silicododecamolybdate/pyridinium-tetrazole hybrid molecular salt as a catalyst for the epoxidation of bio-derived olefins. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120129] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Morales MD, Infantes-Molina A, Lázaro-Martínez J, Romanelli GP, Pizzio LR, Rodríguez-Castellón E. Heterogeneous acid catalysts prepared by immobilization of H3PW12O40 on silica through impregnation and inclusion, applied to the synthesis of 3H-1,5-benzodiazepines. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110842] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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