1
|
Béres KA, Homonnay Z, Kótai L. Hexakis(urea-O)iron Complex Salts as a Versatile Material Family: Overview of Their Properties and Applications. ACS Omega 2024; 9:11148-11167. [PMID: 38496982 PMCID: PMC10938395 DOI: 10.1021/acsomega.3c09635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 02/12/2024] [Accepted: 02/20/2024] [Indexed: 03/19/2024]
Abstract
Due to their Fe- and N-containing reactive urea ligand content, the hexakis(urea-O)iron(II) and hexakis(urea-O)iron(III) complexes were found to be versatile materials in various application fields of industry and environmental protection. In our present work, we have comprehensively reviewed the synthesis, structural and spectroscopic details, and thermal properties of hexakis(urea-O)iron(II) and hexakis(urea-O)iron(III) salts with different anions (NO3-, Cl-, Br- I-, I3-, ClO4-, MnO4-, SO42-, Cr2O72-, and S2O82-). We compared and evaluated the structural, spectroscopic (IR, Raman, UV-vis, Mössbauer, EPR, and X-ray), and thermogravimetric data. Based on the thermal behavior of these complexes, we evaluated the solid-phase quasi-intramolecular redox reactions of anions and urea ligands in these complexes and summarized the available information on the properties of the resulting simple and mixed iron-containing oxides. Furthermore, we give a complete overview of the application of these complexes as catalysts, reagents, absorbers, or agricultural raw materials.
Collapse
Affiliation(s)
- Kende Attila Béres
- Institute
of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar Tudósok krt. 2., H-1117 Budapest, Hungary
- Institute
of Chemistry, ELTE Eötvös
Loránd University, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary
| | - Zoltán Homonnay
- Institute
of Chemistry, ELTE Eötvös
Loránd University, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary
| | - László Kótai
- Institute
of Materials and Environmental Chemistry, HUN-REN Research Centre for Natural Sciences, Magyar Tudósok krt. 2., H-1117 Budapest, Hungary
| |
Collapse
|
2
|
Kótai L, Lázár K, Kiss LF, Szentmihályi K. Reaction of Partially Methylated Polygalacturonic Acid with Iron(III) Chloride and Characterization of a New Mixed Chloride-Polygalacturonate Complex. Molecules 2024; 29:890. [PMID: 38398642 PMCID: PMC10893460 DOI: 10.3390/molecules29040890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/06/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024] Open
Abstract
We have described a new route for the preparation of partially methylated polygalacturonic acid containing hydrolyzed (acidic) and unhydrolyzed (methyl esterified) carboxylate groups in a ratio of 1:1 (PGA, compound 1), and one of its basic FeIII-salts (compound 2) with a ~1:2 FeIII:GA stoichiometry (GA means galacturonic acid and methylated galacturonic acid units). The partially hydrolyzed pectin was transformed into compound 1 with the use of double ion exchange with a strongly acidic macroreticular sulfonated styrene-divinylbenzene copolymer as a hydrogen ion source. The reaction of compound 1 with FeCl3 resulted in compound 2. Compound 2 has a polymeric nature and contains binuclear FeIII(µ-O)(µ-OH)FeIII core units with two kinds of distorted octahedral iron geometries. The salt-forming acidic and methylated GA units of compound 1 are coordinated to FeIII centers in asymmetric bidentate-chelating and -bridging (via C=O group and glycosidic oxygen) modes, respectively. Two kinds of outer-sphere chloride anions were also detected by XPS in various chemical environments fixed by different sets of hydrogen bonds. We also observed a partial reduction of FeIII into FeII due to the ring-opening of the chain-end GA units of compound 1. This reaction provides a new route to determine the number of chain-ends in compound 2, and with the use of the number of GA units calculated from charge neutrality, the average length of these chains and the average molecular weight were also determined. The average molecular weight of the partially methylated polygalacturonic acid used in the industrial-scale production of commercial anti-anemic iron-polygalacturonate agents was ~50,000 g/mol. Compound 2 was also characterized by IR, Mössbauer, and X-ray photoelectron spectroscopy, and magnetic susceptibility measurements. These results on the structure and average molecular weight of basic iron(III) polygalacturonate provide a tool to design Fe-PGA complexes with tuned iron-releasing properties.
Collapse
Affiliation(s)
- László Kótai
- HUN-REN Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, H-1117 Budapest, Hungary
| | - Károly Lázár
- HUN-REN Centre for Energy Research, EKBI, Konkoly Thege Miklós Út, 29-33, H-1121 Budapest, Hungary;
| | | | - Klára Szentmihályi
- HUN-REN Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, H-1117 Budapest, Hungary
| |
Collapse
|
3
|
Lázár A, Molnár Z, Demény A, Kótai L, Trif L, Béres KAA, Bódis E, Bortel G, Aradi LEE, Karlik M, Szabó MZ, Pekker Á, Németh G, Kamaras K, Garvie LA, Németh P. Insights into the amorphous calcium carbonate (ACC) → ikaite → calcite transformations. CrystEngComm 2023. [DOI: 10.1039/d2ce01444k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Amorphous calcium carbonate (ACC) is a precursor material that plays a key role in polymorph selection and crystallization of carbonates. It is involved in the formation of the cryogenic carbonate...
Collapse
|
4
|
Béres KA, Homonnay Z, Kvitek L, Dürvanger Z, Kubikova M, Harmat V, Szilágyi F, Czégény Z, Németh P, Bereczki L, Petruševski VM, Pápai M, Farkas A, Kótai L. Thermally Induced Solid-Phase Quasi-Intramolecular Redox Reactions of [Hexakis(urea- O)iron(III)] Permanganate: An Easy Reaction Route to Prepare Potential (Fe,Mn)O x Catalysts for CO 2 Hydrogenation. Inorg Chem 2022; 61:14403-14418. [PMID: 36044722 PMCID: PMC9477215 DOI: 10.1021/acs.inorgchem.2c02265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Research on new reaction routes and precursors to prepare
catalysts
for CO2 hydrogenation has enormous importance. Here, we
report on the preparation of the permanganate salt of the urea-coordinated
iron(III), [hexakis(urea-O)iron(III)]permanganate
([Fe(urea-O)6](MnO4)3) via an affordable
synthesis route and preliminarily demonstrate the catalytic activity
of its (Fe,Mn)Ox thermal decomposition
products in CO2 hydrogenation. [Fe(urea-O)6](MnO4)3 contains O-coordinated urea ligands in octahedral
propeller-like arrangement around the Fe3+ cation. There
are extended hydrogen bond interactions between the permanganate ions
and the hydrogen atoms of the urea ligands. These hydrogen bonds serve
as reaction centers and have unique roles in the solid-phase quasi-intramolecular
redox reaction of the urea ligand and the permanganate anion below
the temperature of ligand loss of the complex cation. The decomposition
mechanism of the urea ligand (ammonia elimination with the formation
of isocyanuric acid and biuret) has been clarified. In an inert atmosphere,
the final thermal decomposition product was manganese-containing wuestite,
(Fe,Mn)O, at 800 °C, whereas in ambient air, two types of bixbyite
(Fe,Mn)2O3 as well as jacobsite (Fe,Mn)T-4(Fe,Mn)OC-62O4), with overall Fe to Mn stoichiometry of 1:3, were formed. These
final products were obtained regardless of the different atmospheres
applied during thermal treatments up to 350 °C. Disordered bixbyite
formed first with inhomogeneous Fe and Mn distribution and double-size
supercell and then transformed gradually into common bixbyite with
regular structure (and with 1:3 Fe to Mn ratio) upon increasing the
temperature and heating time. The (Fe,Mn)Ox intermediates formed under various conditions showed catalytic effect
in the CO2 hydrogenation reaction with <57.6% CO2 conversions and <39.3% hydrocarbon yields. As a mild solid-phase
oxidant, hexakis(urea-O)iron(III) permanganate, was
found to be selective in the transformation of (un)substituted benzylic
alcohols into benzaldehydes and benzonitriles. [Fe(urea-O)6](MnO4)3 is a selective solid-phase oxidant
of benzylic alcohols
into benzaldehydes and precursor in the preparation of (Fe,Mn)Ox catalysts for CO2 hydrogenation
into hydrocarbons. The urea ligands are in octahedral propeller-like
arrangement around the Fe3+ cation, and there are hydrogen
bonds between the permanganate anions and the urea ligands. A solid-phase
quasi-intramolecular redox reaction of the urea and the permanganate
resulted in (Fe,Mn)O, (Fe,Mn)2O3, and (Fe,Mn)T-4(Fe,Mn)OC-62O4 with an overall Fe to Mn stoichiometry of 1:3.
Collapse
Affiliation(s)
- Kende Attila Béres
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary.,György Hevesy PhD School of Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary
| | - Zoltán Homonnay
- György Hevesy PhD School of Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary
| | - Libor Kvitek
- Faculty of Science, Department of Physical Chemistry, Palacky University Olomouc, 17. Listopadu 12, Olomouc 77146, Czech Republic
| | - Zsolt Dürvanger
- Structural Chemistry and Biology Laboratory, Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary
| | - Martina Kubikova
- Faculty of Science, Department of Physical Chemistry, Palacky University Olomouc, 17. Listopadu 12, Olomouc 77146, Czech Republic
| | - Veronika Harmat
- Structural Chemistry and Biology Laboratory, Institute of Chemistry, ELTE Eötvös Loránd University, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary.,ELKH-ELTE Protein eModelling Research Group, Pázmány Péter s. 1/A, H-1117 Budapest, Hungary
| | - Fanni Szilágyi
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary.,Bay Zoltan Ltd. for Applied Research, Production Division (BAY-PROD), 1 Kondorfa, H-1116 Budapest, Hungary
| | - Zsuzsanna Czégény
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
| | - Péter Németh
- Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, ELKH, Budaörsi street 45, H-1112 Budapest, Hungary
| | - Laura Bereczki
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary
| | - Vladimir M Petruševski
- Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University, Skopje MK-1000, North Macedonia
| | - Mátyás Pápai
- Wigner Research Centre for Physics, H-1525 Budapest, P.O. Box 49, Hungary
| | - Attila Farkas
- Department of Organic Chemistry, Budapest University of Technology and Economics, Műegyetem rakpart 3, H-1111 Budapest, Hungary
| | - László Kótai
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt. 2, H-1117 Budapest, Hungary.,Deuton-X Ltd., Selmeci u. 89, H-2030, Érd, Hungary
| |
Collapse
|
5
|
Kaminwar NS, Tekale SU, Pokalwar RU, Kótai L, Pawar RP. An Efficient and Rapid Synthesis of 1,4-Dihydropyrano[2,3-c]Pyran and 1,4-Dihydropyrano[2,3-c]Quinoline Derivatives Using Copper Nanoparticles Grafted on Carbon Microspheres. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2021.1950194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | | | | | - László Kótai
- Research Centre for Natural Sciences, ELKH, Budapest, Hungary
| | - Rajendra P. Pawar
- Department of Chemistry, Shiv Chhatrapati College, Cidco, Aurangabad, India
| |
Collapse
|
6
|
Petrushevski VM, Béres KA, Bombicz P, Farkas A, Kótai L, Bereczki L. Structural and Raman spectroscopic characterization of tetrapyridinesilver(I) perrhenate, [Agpy4]ReO4. Maced J Chem Chem Eng 2022. [DOI: 10.20450/mjcce.2022.2490] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Tetrapyridinesilver(I) perrhenate [Agpy4]ReO4 was synthesized, and its crystal structure and Raman spectra were elucidated at low temperatures. The crystal lattice is constructed from isolated tetrahedral cations and anions having no argentophilic interactions. Weak hydrogen bonds are formed between the oxygens of the disordered perrhenate anions and the ortho-hydrogens of the pyridine ligands. No parallel π…π stacking interactions are observed, but C-H…π interactions of the pyridine ligands within columns of cations and between the columns appeared. Correlation analysis for Ag+, pyridine ligands, and perrhenate ions was performed, and the perrhenate ion and some of the AgN4 skeleton vibrational modes and pyridine ligand modes in the Raman spectrum of [Agpy4]ReO4 were assigned.
Collapse
|
7
|
Tekale S, Gore V, Kendrekar P, Thore S, Kótai L, Pawar R. COVID-19 Global Pandemic Fight by Drugs: A Mini-Review on Hope and Hype. MINI-REV ORG CHEM 2022. [DOI: 10.2174/1570193x18666210629103117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
:
Coronavirus disease 2019 (Covid-19), a serious disease caused by the Severe Acute Respiratory
Syndrome-Corona Virus-2 (SARS-CoV-2), was firstly identified in the city of Wuhan of
China in December 2019, which then spread and became a global issue due to its high transmission
rate. To date, the outbreak of COVID-19 has resulted in infection to 230,868,745 people and the death
of 4,732,669 patients. It has paralyzed the economy of all the countries worldwide. Considering the
possible mutations of SARS-CoV-2, the current medical emergency requires a longer time for drug
design and vaccine development. Drug repurposing is a promising option for potent therapeutics
against the pandemic. The present review encompasses various drugs or appropriate combinations of
already FDA-approved antimalarial, antiviral, anticancer, anti-inflammatory, and antibiotic therapeutic
candidates for use in the clinical trials as a ray of hope against COVID-19. It is expected to deliver
better clinical and laboratory outcomes of drugs as a prevention strategy for the eradication of the disease.
Collapse
Affiliation(s)
- Sunil Tekale
- Department of Chemistry, Deogiri College, Aurangabad-431005, Maharashtra, India
| | - Vishnu Gore
- Department of Chemistry, Deogiri College, Aurangabad-431005, Maharashtra, India
| | - Pravin Kendrekar
- Unit for Drug Discovery Research (UDDR), Department of Health and Environmental Sciences, Central University of Technology, Free State (CUT) Private Bag X20539, Bloemfontein, 9300, South Africa
| | - Shivaji Thore
- Department of Chemistry, Deogiri College, Aurangabad-431005, Maharashtra, India
| | - László Kótai
- Research Centre for Natural Sciences, ELKH, H-1117, Budapest, Hungary
| | - Rajendra Pawar
- Department of Chemistry, Shiv Chhatrapati College, Cidco, Aurangabad-431005, Maharashtra, India
| |
Collapse
|
8
|
Bereczki L, Fogaça LA, Dürvanger Z, Harmat V, Kamarás K, Németh G, Holló BB, Petruševski VM, Bódis E, Farkas A, Szilágyi IM, Kótai L. Dynamic disorder in the high-temperature polymorph of bis[diamminesilver(I)] sulfate—reasons and consequences of simultaneous ammonia release from two different polymorphs. J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.1953489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Laura Bereczki
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Budapest, Hungary
- Chemical Crystallography Research Laboratory, Research Centre for Natural Sciences, ELKH, Budapest, Hungary
| | - Lara Alexandre Fogaça
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Budapest, Hungary
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zsolt Dürvanger
- Laboratory of Structural Chemistry and Biology, Institute of Chemistry, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Veronika Harmat
- Laboratory of Structural Chemistry and Biology, Institute of Chemistry, ELTE Eötvös Loránd University, Budapest, Hungary
- MTA-ELTE Protein Modelling Research Group, Budapest, Hungary
| | - Katalin Kamarás
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Budapest, Hungary
| | - Gergely Németh
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Budapest, Hungary
| | | | - Vladimir M. Petruševski
- Faculty of Natural Sciences and Mathematics, Ss. Cyryl and Methodius University, Skopje, Macedonia
| | - Eszter Bódis
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Budapest, Hungary
| | - Attila Farkas
- Organic Chemistry Department, Budapest University of Technology and Economics, Budapest, Hungary
| | - Imre Miklós Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - László Kótai
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Budapest, Hungary
- Deuton-X Ltd, Érd, Hungary
| |
Collapse
|
9
|
Béres KA, Sajó IE, Lendvay G, Trif L, Petruševski VM, Barta-Holló B, Korecz L, Franguelli FP, László K, Szilágyi IM, Kótai L. Solid-Phase "Self-Hydrolysis" of [Zn(NH 3) 4MoO 4@2H 2O] Involving Enclathrated Water-An Easy Route to a Layered Basic Ammonium Zinc Molybdate Coordination Polymer. Molecules 2021; 26:4022. [PMID: 34209392 PMCID: PMC8272139 DOI: 10.3390/molecules26134022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 11/16/2022] Open
Abstract
An aerial humidity-induced solid-phase hydrolytic transformation of the [Zn(NH3)4]MoO4@2H2O (compound 1@2H2O) with the formation of [(NH4)xH(1-x)Zn(OH)(MoO4)]n (x = 0.92-0.94) coordination polymer (formally NH4Zn(OH)MoO4, compound 2) is described. Based on the isostructural relationship, the powder XRD indicates that the crystal lattice of compound 1@2H2O contains a hydrogen-bonded network of tetraamminezinc (2+) and molybdate (2-) ions, and there are cavities (O4N4(μ-H12) cube) occupied by the two water molecules, which stabilize the crystal structure. Several observations indicate that the water molecules have no fixed positions in the lattice voids; instead, the cavity provides a neighborhood similar to those in clathrates. The @ symbol in the notation is intended to emphasize that the H2O in this compound is enclathrated rather than being water of crystallization. Yet, signs of temperature-dependent dynamic interactions with the wall of the cages can be detected, and 1@2H2O easily releases its water content even on standing and yields compound 2. Surprisingly, hydrolysis products of 1 were observed even in the absence of aerial humidity, which suggests a unique solid-phase quasi-intramolecular hydrolysis. A mechanism involving successive substitution of the ammonia ligands by water molecules and ammonia release is proposed. An ESR study of the Cu-doped compound 2 (2#dotCu) showed that this complex consists of two different Cu2+(Zn2+) environments in the polymeric structure. Thermal decomposition of compounds 1 and 2 results in ZnMoO4 with similar specific surface area and morphology. The ZnMoO4 samples prepared from compounds 1 and 2 and compound 2 in itself are active photocatalysts in the degradation of Congo Red dye. IR, Raman, and UV studies on compounds 1@2H2O and 2 are discussed in detail.
Collapse
Affiliation(s)
- Kende Attila Béres
- Research Centre for Natural Sciences, Magyar Tudósok Krt 2, 1117 Budapest, Hungary; (K.A.B.); (G.L.); (L.T.); (L.K.); (F.P.F.)
| | - István E. Sajó
- Szentagothai Research Centre, Environmental Analytical and Geoanalytical Research Group, University of Pécs, Ifjúság Útja 20, 7624 Pécs, Hungary;
| | - György Lendvay
- Research Centre for Natural Sciences, Magyar Tudósok Krt 2, 1117 Budapest, Hungary; (K.A.B.); (G.L.); (L.T.); (L.K.); (F.P.F.)
| | - László Trif
- Research Centre for Natural Sciences, Magyar Tudósok Krt 2, 1117 Budapest, Hungary; (K.A.B.); (G.L.); (L.T.); (L.K.); (F.P.F.)
| | - Vladimir M. Petruševski
- Faculty of Natural Sciences and Mathematics, Ss. Cyryl and Methodius University, 1000 Skopje, North Macedonia;
| | - Berta Barta-Holló
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 3, 21000 Novi Sad, Serbia;
| | - László Korecz
- Research Centre for Natural Sciences, Magyar Tudósok Krt 2, 1117 Budapest, Hungary; (K.A.B.); (G.L.); (L.T.); (L.K.); (F.P.F.)
| | - Fernanda Paiva Franguelli
- Research Centre for Natural Sciences, Magyar Tudósok Krt 2, 1117 Budapest, Hungary; (K.A.B.); (G.L.); (L.T.); (L.K.); (F.P.F.)
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem Rakpart 3, 1111 Budapest, Hungary;
| | - Krisztina László
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, Műegyetem Rakpart 3, 1111 Budapest, Hungary;
| | - Imre Miklós Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Műegyetem Rakpart 3, 1111 Budapest, Hungary;
| | - László Kótai
- Research Centre for Natural Sciences, Magyar Tudósok Krt 2, 1117 Budapest, Hungary; (K.A.B.); (G.L.); (L.T.); (L.K.); (F.P.F.)
- Deuton-X Ltd., Selmeci u. 89, 2030 Érd, Hungary
| |
Collapse
|
10
|
Béres KA, Petruševski V, Holló BB, Németh P, Fogaça L, Paiva Franguelli F, Farkas A, Menyhárd A, Szilágyi IM, Kótai L. AgNO
3
⋅NH
4
NO
3
– an enigmatic double‐salt type “decomposition intermediate” of diamminesilver(I) permanganate. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kende Attila Béres
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Vladimir Petruševski
- Faculty of Natural Sciences and Mathematics Ss. Cyryl and Methodius University Skopje Macedonia
| | - Berta Barta Holló
- Department of Chemistry Biochemistry and Environmental Protection Faculty of Sciences University of Novi Sad Trg Dositeja Obradovića 3 21000 Novi Sad Serbia
| | - Péter Németh
- Institute for Geological and Geochemical Research Research Centre for Natural Sciences ELKH, Budaörsi street 45 1112 Budapest Hungary
- Research Institute of Biomolecular and Chemical Engineering University of Pannonia Egyetem út 10 8200 Veszprém Hungary
| | - Lara Fogaça
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3 1111 Budapest Hungary
| | - Fernanda Paiva Franguelli
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3 1111 Budapest Hungary
| | - Attila Farkas
- Department of Organic Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3 1111 Budapest Hungary
| | - Alfréd Menyhárd
- Department of Physical Chemistry and Materials Science Budapest University of Technology and Economics Műegyetem rakpart 3 1111 Budapest Hungary
| | - Imre Miklós Szilágyi
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3 1111 Budapest Hungary
| | - László Kótai
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
- Deuton-X Ltd. Selmeci. U. 89 H-2030 Érd Hungary
| |
Collapse
|
11
|
Majzik E, Franguelli FP, Lendvay G, Trif L, Németh C, Farkas A, Klébert S, Bereczki L, Szilágyi IM, Kótai L. Front Cover: Deuteration and Vibrational Spectra of Dimethylammonium Paratungstate‐B Hydrates (Z. Anorg. Allg. Chem. 6/2021). Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Eszter Majzik
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 Budapest 1117 Hungary
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3. Budapest 1111 Hungary
| | - Fernanda Paiva Franguelli
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 Budapest 1117 Hungary
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3. Budapest 1111 Hungary
| | - György Lendvay
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 Budapest 1117 Hungary
| | - László Trif
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 Budapest 1117 Hungary
| | - Csaba Németh
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 Budapest 1117 Hungary
| | - Attila Farkas
- Department of Organic Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3. Budapest 1111 Hungary
| | - Szilvia Klébert
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 Budapest 1117 Hungary
| | - Laura Bereczki
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 Budapest 1117 Hungary
| | - Imre Miklós Szilágyi
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3. Budapest 1111 Hungary
| | - László Kótai
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 Budapest 1117 Hungary
- Deuton-X Ltd Selmeci u. 89 Érd 2030 Hungary
| |
Collapse
|
12
|
Fogaca LA, Kováts É, Németh G, Kamarás K, Béres KA, Németh P, Petruševski V, Bereczki L, Holló BB, Sajó I, Klébert S, Farkas A, Szilágyi IM, Kótai L. Solid-Phase Quasi-Intramolecular Redox Reaction of [Ag(NH 3) 2]MnO 4: An Easy Way to Prepare Pure AgMnO 2. Inorg Chem 2021; 60:3749-3760. [PMID: 33647206 PMCID: PMC8034774 DOI: 10.1021/acs.inorgchem.0c03498] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Indexed: 11/29/2022]
Abstract
Two monoclinic polymorphs of [Ag(NH3)2]MnO4 containing a unique coordination mode of permanganate ions were prepared, and the high-temperature polymorph was used as a precursor to synthesize pure AgMnO2. The hydrogen bonds between the permanganate ions and the hydrogen atoms of ammonia were detected by IR spectroscopy and single-crystal X-ray diffraction. Under thermal decomposition, these hydrogen bonds induced a solid-phase quasi-intramolecular redox reaction between the [Ag(NH3)2]+ cation and MnO4- anion even before losing the ammonia ligand or permanganate oxygen atom. The polymorphs decomposed into finely dispersed elementary silver, amorphous MnOx compounds, and H2O, N2 and NO gases. Annealing the primary decomposition product at 573 K, the metallic silver reacted with the manganese oxides and resulted in the formation of amorphous silver manganese oxides, which started to crystallize only at 773 K and completely transformed into AgMnO2 at 873 K.
Collapse
Affiliation(s)
- Lara A. Fogaca
- Department
of Inorganic and Analytical Chemistry, Budapest
University of Technology and Economics, Müegyetem rakpart 3, Budapest H-1111, Hungary
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural
Sciences, Magyar Tudósok krt 2, Budapest H-1117, Hungary
| | - Éva Kováts
- Wigner
Research Centre for Physics (RCP), Institute for Solid State Physics
and Optics, Konkoly Thege u. 29−33, Budapest H-1121, Hungary
| | - Gergely Németh
- Wigner
Research Centre for Physics (RCP), Institute for Solid State Physics
and Optics, Konkoly Thege u. 29−33, Budapest H-1121, Hungary
| | - Katalin Kamarás
- Wigner
Research Centre for Physics (RCP), Institute for Solid State Physics
and Optics, Konkoly Thege u. 29−33, Budapest H-1121, Hungary
| | - Kende A. Béres
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural
Sciences, Magyar Tudósok krt 2, Budapest H-1117, Hungary
| | - Péter Németh
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural
Sciences, Magyar Tudósok krt 2, Budapest H-1117, Hungary
- Department
of Earth and Environmental Sciences, University
of Pannonia, Egyetem
út 10, Veszprém H-8200, Hungary
| | - Vladimir Petruševski
- Faculty
of Natural Sciences and Mathematics, Ss.
Cyril and Methodius University, Skopje 1000, Macedonia
| | - Laura Bereczki
- Chemical
Crystallography Research Laboratory, Research Centre for Natural Sciences, University of Novi Sad, Novi Sad 21000, Serbia
| | - Berta Barta Holló
- Department
of Chemistry, Biochemistry and Environmental Protection, Faculty of
Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad 21000, Serbia
| | - István
E. Sajó
- János
Szentágothai Research Centre, University
of Pécs, Ifjúság
útja 20, Pécs H-7624, Hungary
| | - Szilvia Klébert
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural
Sciences, Magyar Tudósok krt 2, Budapest H-1117, Hungary
| | - Attila Farkas
- Department
of Organic Chemistry, Budapest University
of Technology and Economics, Budapest H-1111, Hungary
| | - Imre M. Szilágyi
- Department
of Inorganic and Analytical Chemistry, Budapest
University of Technology and Economics, Müegyetem rakpart 3, Budapest H-1111, Hungary
| | - László Kótai
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural
Sciences, Magyar Tudósok krt 2, Budapest H-1117, Hungary
- Deuton-X Ltd., Selmeci
u2. 89, Érd H-2030, Hungary
| |
Collapse
|
13
|
Solt H, Németh P, Mohai M, Sajó IE, Klébert S, Franguelli FP, Fogaca LA, Pawar RP, Kótai L. Temperature-Limited Synthesis of Copper Manganites along the Borderline of the Amorphous/Crystalline State and Their Catalytic Activity in CO Oxidation. ACS Omega 2021; 6:1523-1533. [PMID: 33490812 PMCID: PMC7818585 DOI: 10.1021/acsomega.0c05301] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
Copper manganese oxides (CMO) with CuMn2O4 composition are well-known catalysts, which are widely used for the oxidative removal of dangerous chemicals, e.g., enhancing the CO to CO2 conversion. Their catalytic activity is the highest, close to those of the pre-crystalline and amorphous states. Here we show an easy way to prepare a stable CMO material at the borderline of the amorphous and crystalline state (BAC-CMO) at low temperatures (<100 °C) followed annealing at 300 °C and point out its excellent catalytic activity in CO oxidation reactions. We demonstrate that the temperature-controlled decomposition of [Cu(NH3)4](MnO4)2 in CHCl3 and CCl4 at 61 and 77 °C, respectively, gives rise to the formation of amorphous CMO and NH4NO3, which greatly influences the composition as well as the Cu valence state of the annealed CMOs. Washing with water and annealing at 300 °C result in a BAC-CMO material, whereas the direct annealing of the as-prepared product at 300 °C gives rise to crystalline CuMn2O4 (sCMO, 15-40 nm) and ((Cu,Mn)2O3, bCMO, 35-40 nm) mixture. The annealing temperature influences both the quantity and crystallite size of sCMO and bCMO products. In 0.5% CO/0.5% O2/He mixture the best CO to CO2 conversion rates were achieved at 200 °C with the BAC-CMO sample (0.011 mol CO2/(m2 h)) prepared in CCl4. The activity of this BAC-CMO at 125 °C decreases to half of its original value within 3 h and this activity is almost unchanged during another 20 h. The BAC-CMO catalyst can be regenerated without any loss in its catalytic activity, which provides the possibility for its long-term industrial application.
Collapse
Affiliation(s)
- Hanna
E. Solt
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
| | - Péter Németh
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
- Department
of Earth and Environmental Sciences, University
of Pannonia, Egyetem
út 10, Veszprém H-8200, Hungary
| | - Miklós Mohai
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
| | - István E. Sajó
- Szentágothai
Research Center, University of Pécs, Ifjúság útja
20, Pécs H-7624, Hungary
| | - Szilvia Klébert
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
| | - Fernanda Paiva Franguelli
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
- Department
of Inorganic and Analytical Chemistry, Budapest
University of Technology and Economics, Műegyetem rakpart 3, Budapest H-1111, Magyarország
| | - Lara Alexandre Fogaca
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
- Department
of Inorganic and Analytical Chemistry, Budapest
University of Technology and Economics, Műegyetem rakpart 3, Budapest H-1111, Magyarország
| | - Rajendra P. Pawar
- Organic
Chemistry Department, Deogiri College, Station Road, Aurangabad 431005, Maharastra, India
| | - László Kótai
- Institute
of Materials and Environmental Chemistry, Research Centre for Natural Sciences, ELKH, Magyar tudósok krt. 2, Budapest H-1117, Hungary
- Deuton-X
Ltd., Selmeci ut 89, Érd 2030, Hungary
| |
Collapse
|
14
|
Lendvay G, Majzik E, Bereczki L, Domján A, Trif L, Sajó IE, Franguelli FP, Farkas A, Klébert S, Bombicz P, Németh C, Szilágyi IM, Kótai L. (Me 2NH 2) 10[H 2-Dodecatungstate] polymorphs: dodecatungstate cages embedded in a variable dimethylammonium cation + water of crystallization matrix. RSC Adv 2021; 11:3713-3724. [PMID: 35424281 PMCID: PMC8694218 DOI: 10.1039/d0ra09997j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 12/26/2020] [Indexed: 11/21/2022] Open
Abstract
Two polymorphs and a solvatomorph of a new dimethylammonium polytungstate-decakis(dimethylammonium) dihydrogendodecatungstate, (Me2NH2)10(W12O42)·nH2O (n = 10 or 11)-have been synthesized. Their structures were characterized by single-crystal X-ray diffraction and solid-phase NMR methods. The shape of the dodecatungstate anions is essentially the same in all three structures, their interaction with the cations and water of crystallization, however, is remarkably variable, because the latter forms different hydrogen-bonded networks, and provides a highly versatile matrix. Accordingly, the N-H⋯O and C-H⋯O hydrogen bonds are positioned in each crystal lattice in a variety of environments, characteristic to the structure, which can be distinguished by solid-state 1H-CRAMPS, 13C, 15N CP MAS and 1H-13C heteronuclear correlation NMR. Thermogravimetry of the solvatomorphs also reflect the difference and multiformity of the environment of the water molecules in the different crystal lattices. The major factors behind the variability of the matrix are the ability of ammonium cations to form two hydrogen bonds and the rigidity of the polyoxometalate anion cage. The positions of the oxygen atoms in the latter are favourable for the formation of bifurcated and trifurcated cation-anion hydrogen bonds, some which are so durable that they persist after the crystals are dissolved in water, forming ion associates even in dilute solutions. The H atom involved in furcated hydrogen bonds cannot be exchanged by deuterium when the compound is dissolved in D2O. An obvious consequence of the versatility of the matrix is the propensity of these compounds to form multiple polymorphs.
Collapse
Affiliation(s)
- György Lendvay
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary
| | - Eszter Majzik
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary .,University of Technology and Economics, Department of Inorganic and Analytical Chemistry Budapest H-1111 Hungary
| | - Laura Bereczki
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary
| | - Attila Domján
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary
| | - László Trif
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary
| | - István E Sajó
- University of Pécs, János Szentágothai Research Centre Pécs H-7624 Hungary
| | - Fernanda Paiva Franguelli
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary .,University of Technology and Economics, Department of Inorganic and Analytical Chemistry Budapest H-1111 Hungary
| | - Attila Farkas
- University of Technology and Economics, Department of Organic Chemistry Budapest H-1111 Hungary
| | - Szilvia Klébert
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary
| | - Petra Bombicz
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary
| | - Csaba Németh
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary
| | - Imre Miklós Szilágyi
- University of Technology and Economics, Department of Inorganic and Analytical Chemistry Budapest H-1111 Hungary
| | - László Kótai
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences Budapest H-1117 Hungary .,Deuton-X Ltd. Selmeci u. 89 Érd H-2030 Hungary
| |
Collapse
|
15
|
Abstract
Molecular iodine contributes significantly to organic transformations in synthetic organic chemistry. It works effectively due to its mild Lewis acidic character, ability as an oxidizing agent, good moisture stability, and easy availability.
Collapse
Affiliation(s)
- Popat M. Jadhav
- Department of Chemistry, Deogiri College, Aurangabad 431 005, Maharashtra, India
| | - Ambadas B. Rode
- Regional Centre for Biotechnology, Faridabad-121 001, Haryana (NCR Delhi), India
| | - László Kótai
- Research Centre for Natural Sciences, ELKH, H-1117, Budapest, Hungary
| | - Rajendra P. Pawar
- Department of Chemistry, Shiv Chhatrapati College, Aurangabad 431005, Maharashtra, India
| | - Sunil U. Tekale
- Department of Chemistry, Deogiri College, Aurangabad 431 005, Maharashtra, India
| |
Collapse
|
16
|
Bhale SP, Yadav AR, Pathare PG, Tekale SU, Franguelli FP, Kótai L, Pawar RP. Synthesis, characterization and antimicrobial activity of transition metal complexes of 4-[(2-hydroxy-4-methoxyphenyl)methyleneamino]-2,4-dihydro-3H-1,2,4-triazole-3-thione. ECB 2020. [DOI: 10.17628/ecb.2020.9.430-435] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
17
|
Kauthale SS, Tekale SU, Kótai L, Kendrekar PS, Pawar RP. Synthesis of Pyran Annulated Heterocyclic Compounds under Catalyst Free Conditions Using Aqueous Ethylene Glycol. ORG PREP PROCED INT 2020. [DOI: 10.1080/00304948.2020.1812360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | | | - László Kótai
- Research Center for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Pravin S. Kendrekar
- Department of Health Sciences, Central University of Technology, Bloemfontein, South Africa
| | | |
Collapse
|
18
|
Majzik E, Franguelli FP, Lendvay G, Trif L, Németh C, Farkas A, Klébert S, Bereczki L, Szilágyi IM, Kótai L. Deuteration and Vibrational Spectra of Dimethylammonium Paratungstate‐B Hydrates. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000283] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Eszter Majzik
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3. 1111 Budapest Hungary
| | - Fernanda Paiva Franguelli
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3. 1111 Budapest Hungary
| | - György Lendvay
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
| | - László Trif
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Csaba Németh
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Attila Farkas
- Department of Organic Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3. 1111 Budapest Hungary
| | - Szilvia Klébert
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Laura Bereczki
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
| | - Imre Miklós Szilágyi
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Műegyetem rakpart 3. 1111 Budapest Hungary
| | - László Kótai
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences, ELKH Magyar tudósok krt. 2 1117 Budapest Hungary
- Deuton‐X Ltd Selmeci u. 89 2030 Érd Hungary
| |
Collapse
|
19
|
|
20
|
Enyedi NT, Makk J, Kótai L, Berényi B, Klébert S, Sebestyén Z, Molnár Z, Borsodi AK, Leél-Őssy S, Demény A, Németh P. Cave bacteria-induced amorphous calcium carbonate formation. Sci Rep 2020; 10:8696. [PMID: 32457467 PMCID: PMC7251137 DOI: 10.1038/s41598-020-65667-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 05/07/2020] [Indexed: 11/08/2022] Open
Abstract
Amorphous calcium carbonate (ACC) is a precursor of crystalline calcium carbonates that plays a key role in biomineralization and polymorph evolution. Here, we show that several bacterial strains isolated from a Hungarian cave produce ACC and their extracellular polymeric substance (EPS) shields ACC from crystallization. The findings demonstrate that bacteria-produced ACC forms in water-rich environment at room temperature and is stable for at least half year, which is in contrast to laboratory-produced ACC that needs to be stored in a desiccator and kept below 10 °C for avoiding crystallization. The ACC-shielding EPS consists of lipids, proteins, carbohydrates and nucleic acids. In particular, we identified large amount of long-chain fatty acid components. We suggest that ACC could be enclosed in a micella-like formula within the EPS that inhibits water infiltration. As the bacterial cells lyse, the covering protective layer disintegrates, water penetrates and the unprotected ACC grains crystallize to calcite. Our study indicates that bacteria are capable of producing ACC, and we estimate its quantity in comparison to calcite presumably varies up to 20% depending on the age of the colony. Since diverse bacterial communities colonize the surface of cave sediments in temperate zone, we presume that ACC is common in these caves and its occurrence is directly linked to bacterial activity and influences the geochemical signals recorded in speleothems.
Collapse
Affiliation(s)
- Nóra Tünde Enyedi
- Department of Microbiology, Faculty of Science, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary
| | - Judit Makk
- Department of Microbiology, Faculty of Science, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary
| | - László Kótai
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H-1117, Budapest, Hungary
- Deuton-X Ltd., Selmeci u. 89, H-2030, Érd, Hungary
| | - Bernadett Berényi
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H-1117, Budapest, Hungary
| | - Szilvia Klébert
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H-1117, Budapest, Hungary
| | - Zoltán Sebestyén
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H-1117, Budapest, Hungary
| | - Zsombor Molnár
- Department of Earth and Environmental Sciences, University of Pannonia, Egyetem út 10, H-8200, Veszprém, Hungary
| | - Andrea K Borsodi
- Department of Microbiology, Faculty of Science, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary
| | - Szabolcs Leél-Őssy
- Department of Physical and Applied Geology, Faculty of Science, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117, Budapest, Hungary
| | - Attila Demény
- Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Budaörsi út 45, H-1112, Budapest, Hungary
| | - Péter Németh
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H-1117, Budapest, Hungary.
- Department of Earth and Environmental Sciences, University of Pannonia, Egyetem út 10, H-8200, Veszprém, Hungary.
| |
Collapse
|
21
|
Landge S, Dahale S, Devadhe S, Desmukh D, Solanki P, Jadhav S, Kótai L, Bembalkar SR, Pawar RP. SEPARATION AND QUANTIFICATION OF STRUCTURALLY SIMILAR IMPURITIES BY HPLC METHOD OF VORTIOXETINE HYDROBROMIDE- AN ANTIDEPRESSANT DRUG. ECB 2020. [DOI: 10.17628/ecb.2020.9.114-118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
22
|
More YW, Tekale SU, Kaminwar NS, Kótai L, Pasinszki T, Kendrekar PS, Pawar RP. Synthesis of 3,4-Dihydropyrano[c]chromenes Using Carbon Microsphere Supported Copper Nanoparticles (Cu-NP/C) Prepared from Loaded Cation Exchange Resin as a Catalyst. Curr Org Synth 2020; 16:288-293. [PMID: 31975678 DOI: 10.2174/1570179415666181116104931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 10/22/2018] [Accepted: 10/27/2018] [Indexed: 11/22/2022]
Abstract
AIM AND OBJECTIVE The present study was performed with the aim to develop an efficient and environmentally benign protocol for the synthesis of biologically siginifcant 3, 4-dihydropyrano[c]chromenes using a new catalytic material. The protocol involves the use of a reusable, environment friendly materials and solvents with operational simplicity. MATERIALS AND METHODS Carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin were synthesized, characterized with well versed analytical techniques such as XRD, SEM and Raman spectroscopy and the synthesized material was used as a catalyst for the environmentally benign synthesis of 3,4-dihydropyrano[c]chromenes. RESULTS The formation of carbon microsphere supported copper nanoparticles (Cu-NP/C) prepared from loaded cation exchange resin was confirmed by XRD, SEM and Raman spectroscopy which was employed as a heterogeneous material for the synthesis of 3,4-dihydropyrano[c]chromenes. The products formed were characterized by the analysis of spectroscopic data - NMR, IR and mass. The safe catalytic system offers several advantages including operational simplicity, environmental friendliness, high yield, and reusability of catalyst and green chemical transformation. CONCLUSION Herein we report an easy and efficient protocol for the one-pot synthesis of dihydropyrano[ c]chromenes using environmentally benign MCR approach in ethanol as the green solvent. The method developed herein constitutes a valuable addition to the existing methods for the synthesis of titled compounds.
Collapse
Affiliation(s)
- Yogesh W More
- Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra), India
| | - Sunil U Tekale
- Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra), India
| | | | - László Kótai
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, H-1519, Hungary
| | - Tibor Pasinszki
- Department of Chemistry, School of Pure Sciences, College of Engineering, Science & Technology, Fiji National University, Nasinu 7222, Fiji
| | - Pravin S Kendrekar
- Department of Health Sciences, Central University of Technology, Bloemfontein, Free State-9300, South Africa
| | - Rajendra P Pawar
- Department of Chemistry, Deogiri College, Aurangabad 431005 (Maharashtra), India
| |
Collapse
|
23
|
Pathare PG, Tekale SU, Damale MG, Sangshetti JN, Shaikh RU, Kótai L, Pawar RP. PYRIDINE AND BENZOISOTHIAZOLE BASED PYRAZOLINES: SYNTHESIS, CHARACTERIZATION, BIOLOGICAL ACTIVITY, MOLECULAR DOCKING AND ADMET STUDY. ECB 2019. [DOI: 10.17628/ecb.2020.9.10-21] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
24
|
Kauthale S, Tekale S, Rode A, Patil R, Sangshetti J, Kótai L, Pawar RP. Eaton’s Reagent Catalyzed Synthesis, Invitro α-Amylase Inhibitory Activity and Molecular Docking Study of some Schiff’s Bases as Diabetic-II Inhibitors. ECB 2019. [DOI: 10.17628/ecb.2019.8.356-362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
25
|
Kovács GB, May NV, Bombicz PA, Klébert S, Németh P, Menyhárd A, Novodárszki G, Petrusevski V, Franguelli FP, Magyari J, Béres K, Szilágyi IM, Kótai L. An unknown component of a selective and mild oxidant: structure and oxidative ability of a double salt-type complex having κ 1O-coordinated permanganate anions and three- and four-fold coordinated silver cations. RSC Adv 2019; 9:28387-28398. [PMID: 35529631 PMCID: PMC9071043 DOI: 10.1039/c9ra03230d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 08/21/2019] [Indexed: 12/30/2022] Open
Abstract
Compounds containing redox active permanganate anions and complexed silver cations with reducing pyridine ligands are used not only as selective and mild oxidants in organic chemistry but as precursors for nanocatalyst synthesis in low-temperature solid-phase quasi-intramolecular redox reactions. Here we show a novel compound (4Agpy2MnO4·Agpy4MnO4) that has unique structural features including (1) four coordinated and one non-coordinated permanganate anion, (2) κ1O-permanganate coordinated Ag, (3) chain-like [Ag(py)2]+ units, (4) non-coordinated ionic permanganate ions and an [Ag(py)4]+ tetrahedra as well as (5) unsymmetrical hydrogen bonds between pyridine α-CHs and a permanganate oxygen. As a result of the oxidizing permanganate anion and reducing pyridine ligand, a highly exothermic reaction occurs at 85 °C. If the decomposition heat is absorbed by alumina or oxidation-resistant organic solvents (the solvent absorbs the heat to evaporate), the decomposition reaction proceeds smoothly and safely. During heating of the solid material, pyridine is partly oxidized into carbon dioxide and water; the solid phase decomposition end product contains mainly metallic Ag, Mn3O4 and some encapsulated carbon dioxide. Surprisingly, the enigmatic carbon-dioxide is an intercalated gas instead of the expected chemisorbed carbonate form. The title compound is proved to be a mild and efficient oxidant toward benzyl alcohols with an almost quantitative yield of benzaldehydes.
Collapse
Affiliation(s)
- Gréta Bettina Kovács
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary .,Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics Műegyetem Rakpart 3 Budapest H-1111 Hungary
| | - Nóra V May
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Petra Alexandra Bombicz
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Szilvia Klébert
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Péter Németh
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Alfréd Menyhárd
- Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics Budapest Hungary
| | - Gyula Novodárszki
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Vladimir Petrusevski
- Faculty of Natural Sciences and Mathematics, Ss. Cyril and Methodius University Skopje Republic of Macedonia
| | - Fernanda Paiva Franguelli
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - József Magyari
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad Trg Dositeja Obradovića 3 Novi Sad 21000 Serbia
| | - Kende Béres
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary
| | - Imre Miklós Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics Műegyetem Rakpart 3 Budapest H-1111 Hungary
| | - László Kótai
- Research Centre for Natural Sciences, Hungarian Academy of Sciences Magyar Tudósok krt. 2 Budapest H-1117 Hungary .,Deuton-X Ltd. Selmeci u. 89 Érd H-2030 Hungary
| |
Collapse
|
26
|
Sankhla R, Kothari S, Kótai L, Banerji KK. Kinetics and Mechanism of the Oxidative Regeneration of Carbonyl Compounds from Oximes by Cetyltrimethylammonium Permanganate. Journal of Chemical Research 2019. [DOI: 10.3184/030823401103169289] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The oxidative deoximination of several aldo- and keto-oximes by cetyltrimethylammonium permanganate (CTAP), in dichloromethane, proceeding through the formation of a cyclic intermediate, in the rate-determining step, has been proposed.
Collapse
Affiliation(s)
- Rekha Sankhla
- Department of Chemistry, J.N.V. University, Jodhpur 342005, India
| | - Seema Kothari
- Department of Chemistry, J.N.V. University, Jodhpur 342005, India
| | - László Kótai
- Chemical Research Center, Institute of Chemistry, Hungarian Academy of Sciences, H-1025, Budapest, Pusztaseri u. 59-67, Hungary
| | | |
Collapse
|
27
|
Dubey R, Kótai L, Banerji KK. Kinetics and mechanism of the oxidation of Substituted Benzylamines by Oxo(Salen)Manganese (V) Complexes. Journal of Chemical Research 2019. [DOI: 10.3184/030823403103173147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The oxidation of substituted benzylamines by oxo(salen) Mn(V) complexes, to the corresponding aldimine, proceeds through a hydride ion transfer from the amine to the oxidant.
Collapse
Affiliation(s)
- Rashmi Dubey
- Department of Chemistry, J.N.V. University, Jodhpur 342005, India
| | - László Kótai
- Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H-1025, Budapest, Pusztaseri u. 59-67, Hungary
| | | |
Collapse
|
28
|
Sankhla R, Kothari S, Kótai L, Banerji KK. Kinetics and Mechanism of the Oxidative Regeneration of Carbonyl Compounds from Oximes by Cetyltrimethylammonium Permanganate. Journal of Chemical Research 2019. [DOI: 10.3184/030823401103169397] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The oxidative deoximination of several aldo- and keto-oximes by cetyltrimethylammonium permanganate (CTAP), in dichloromethane, proceeding through the formation of a cyclic intermediate, in the rate-determining step, has been proposed.
Collapse
Affiliation(s)
- Rekha Sankhla
- Department of Chemistry, J.N.V. University, Jodhpur 342005, India
| | - Seema Kothari
- Department of Chemistry, J.N.V. University, Jodhpur 342005, India
| | - László Kótai
- Chemical Research Center, Institute of Chemistry, Hungarian Academy of Sciences, H-1025, Budapest, Pusztaseri u. 59-67, Hungary
| | | |
Collapse
|
29
|
Sajó IE, Bakos LP, Szilágyi IM, Lendvay G, Magyari J, Mohai M, Szegedi Á, Farkas A, Jánosity A, Klébert S, Kótai L. Unexpected Sequential NH 3/H 2O Solid/Gas Phase Ligand Exchange and Quasi-Intramolecular Self-Protonation Yield [NH 4Cu(OH)MoO 4], a Photocatalyst Misidentified before as (NH 4) 2Cu(MoO 4) 2. Inorg Chem 2018; 57:13679-13692. [PMID: 30351069 DOI: 10.1021/acs.inorgchem.8b02261] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[NH4Cu(OH)MoO4] as active photocatalyst in the decomposition of Congo Red when irradiated by UV or visible light has been prepared in an unusual ammonia/water ligand exchange reaction of [tetraamminecopper(II)] molybdate, [Cu(NH3)4]MoO4. [Cu(NH3)4]MoO4 was subjected to moisture of open air at room temperature. Light blue orthorhombic [Cu(NH3)(H2O)3]MoO4 was formed in 2 days as a result of an unexpected solid/gas phase ammonia-water ligand exchange reaction. This complex does not lose its last ammonia ligand on further standing in open air; however, a slow quasi-intramolecular (self)-protonation reaction takes place in 2-4 weeks, producing a yellowish-green microcrystalline material, which has been identified as a new compound, [NH4Cu(OH)MoO4], ( a = 10,5306 Å, b = 6.0871 Å, c = 8.0148 Å, β = 64,153°, C2, Z = 4). Mechanisms are proposed for both the sequential ligand exchange and the self-protonation reactions supported by ab initio quantum-chemical calculations and deuteration experiments as well. The [Cu(NH3)(H2O)3]MoO4 intermediate transforms into NH4Cu(OH)(H2O)2MoO4, which loses two waters and yields [NH4Cu(OH)MoO4]. Upon heating, both [Cu(NH3)4]MoO4 and [Cu(NH3)(H2O)3]MoO4 decompose, losing three NH3 and three H2O ligands, respectively, and stable [Cu(NH3)MoO4] is formed from both. The latter can partially be hydrated in boiling water into [NH4Cu(OH)MoO4. This compound can also be prepared in pure form by boiling the saturated aqueous solution of [Cu(NH3)4]MoO4. All properties of [NH4Cu(OH)MoO4] match those of the active photocatalyst described earlier in the literature under the formulas (NH4)2[Cu(MoO4)2] and (NH4)2Cu4(NH3)3Mo5O20.
Collapse
Affiliation(s)
- István E Sajó
- University of Pécs , János Szentágothai Research Centre , Pécs , H-7624 , Hungary
| | - László P Bakos
- Budapest University of Technology and Economics , Department of Inorganic and Analytical Chemistry , Müegyetem rakpart 3 , Budapest , H-1111 , Hungary
| | - Imre M Szilágyi
- Budapest University of Technology and Economics , Department of Inorganic and Analytical Chemistry , Müegyetem rakpart 3 , Budapest , H-1111 , Hungary
| | - György Lendvay
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - József Magyari
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences , University of Novi Sad , Trg Dositeja Obradovića 3 , Novi Sad , 21000 , Serbia
| | - Miklós Mohai
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - Ágnes Szegedi
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - Attila Farkas
- Budapest University of Technology and Economics , Department of Organic Chemistry , Müegyetem rakpart 3 , Budapest , H-1111 , Hungary
| | - Anna Jánosity
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - Szilvia Klébert
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary
| | - László Kótai
- Research Centre for Natural Sciences , Hungarian Academy of Sciences , Magyar Tudósok krt. 2 , Budapest , H-1519 , Hungary.,Deuton-X Ltd. , H-2030 , Érd , Selmeci u. 89, Hungary
| |
Collapse
|
30
|
Sajó IE, Kovács GB, Pasinszki T, Bombicz PA, May Z, Szilágyi IM, Jánosity A, Banerji KK, Kant R, Kótai L. The chemical identity of “[Ag(py)2]MnO4” organic solvent soluble oxidizing agent and new synthetic routes for the preparation of [Ag(py)n]XO4 (X = Mn, Cl, and Re, n = 2–4) complexes. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1493464] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- István E. Sajó
- János Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Gréta B. Kovács
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Tibor Pasinszki
- Department of Chemistry, Faculty of Sciences, College of Engineering, Science & Technology, Fiji National University, Nasinu, Suva, Fiji Islands
| | - Petra A. Bombicz
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Zoltán May
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Imre M. Szilágyi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Anna Jánosity
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | | | - Rajni Kant
- Department of Physics, X-ray Crystallography Laboratory, University of Jammu, Jammu-Tawi, India
| | - László Kótai
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- Deuton-X Ltd., Érd, Hungary
| |
Collapse
|
31
|
Bhosale HD, Shisodia SU, Ingle RD, Kendrekar PS, Shisodia AU, Kótai L, Pawar RP. AN EXPEDITIOUS AND GREEN APPROACH FOR THE SYNTHESIS OF 2-AMINO-4H-CHROMENES USING A CATALYST OF NATURAL ORIGIN. ECB 2018. [DOI: 10.17628/ecb.2018.7.120-122] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
32
|
Pasinszki T, Krebsz M, Lajgut GG, Kocsis T, Kótai L, Kauthale S, Tekale S, Pawar R. Copper nanoparticles grafted on carbon microspheres as novel heterogeneous catalysts and their application for the reduction of nitrophenol and one-pot multicomponent synthesis of hexahydroquinolines. NEW J CHEM 2018. [DOI: 10.1039/c7nj03562d] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon microsphere-supported Cu nanoparticles were fabricated, characterized, and applied for synthesis.
Collapse
Affiliation(s)
- Tibor Pasinszki
- ELTE Eötvös Loránd University
- Institute of Chemistry
- Budapest
- Hungary
| | - Melinda Krebsz
- ELTE Eötvös Loránd University
- Institute of Chemistry
- Budapest
- Hungary
| | | | - Tünde Kocsis
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - László Kótai
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | | | - Sunil Tekale
- Department of Chemistry
- Deogiri College
- Aurangabad (MS)
- India
| | - Rajendra Pawar
- Department of Chemistry
- Deogiri College
- Aurangabad (MS)
- India
| |
Collapse
|
33
|
Swami MB, Kaminwar NS, More YW, Pathare PG, Kótai L, Kendrekar PK, Pawar RP. SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL ACTIVITIES OF 4-THIAZOLIDINONE AND 2-AZETIDINONE DERIVATIVES. ECB 2017. [DOI: 10.17628/ecb.2017.6.98-100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
34
|
Godse VWG, Rindhe SS, Kótai L, Bembalkar SR, Ingle RD, Pawar RP. L-Pyrrolidine-2-carboxylic acid sulfate (LPCAS): A new ionic liquid for the synthesis of 1,8-dioxooctahydroxanthenes. ECB 2017. [DOI: 10.17628/ecb.2017.6.1-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
35
|
Kótai L, Bálint S, Gács I, Lakatos G, Angyal A, Mehrotra RN. A Simple Method for Calculation of the Composition of Type I Clathrate Hydrates. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201100394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
36
|
Kótai L, Bálint S, Gács I, Lakatos G, Angyal A, Mehrotra RN. The Minimal Occupancy Level of the Clathrate Hydrate Host Lattice and the Intercalation Heat of the Guest Molecules in the Chlorine Hydrates. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201100393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
37
|
Kótai L, Sajó IE, Jakab E, Keresztury G, Németh C, Gács I, Menyhárd A, Kristóf J, Hajba L, Petrusevski VM, Ivanovski V, Timpu D, Sharma PK. Studies on the Chemistry of [Cd(NH3)4](MnO4)2. A Low Temperature Synthesis Route of the CdMn2O4+xType NOxand CH3SH Sensor Precursors. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100467] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
38
|
Kótai L, Sajó IE, Jakab E, Keresztury G, Pfeifer É, Kocsis L, Papp K, Gács I, Valyon J, Lippart J. A Convenient Procedure for the Acidic Activation of Mineral Bentonite: An Environmentally Friendly Method for the Preparation of Bleaching Earths. CHEM LETT 2008. [DOI: 10.1246/cl.2008.1110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
39
|
Kótai L, Gömöry Á, Gács I, Holly LS, Sajó IE, Tamics E, Aradi T, Bihátsi L. An Efficient Method for the Transformation of High Fatty Acid Containing Vegetable Oils to Biodiesel Fuels. CHEM LETT 2008. [DOI: 10.1246/cl.2008.1076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
40
|
Megyes T, Bálint S, Bakó I, Grósz T, Kótai L, Pálinkás G. Solution structure determination of tetranuclear platinum(II) cluster complex in acetic acid: X-ray diffraction and molecular dynamics simulation study. J Mol Liq 2008. [DOI: 10.1016/j.molliq.2008.04.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
41
|
Sajó I, Kótai L, Keresztury G, Gács I, Pokol G, Kristóf J, Soptrayanov B, Petrusevski V, Timpu D, Sharma P. Studies on the Chemistry of Tetraamminezinc(II) Dipermanganate ([Zn(NH3)4](MnO4)2): Low-Temperature Synthesis of the Manganese Zinc Oxide (ZnMn2O4) Catalyst Precursor. Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890180] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
42
|
Kótai L, Sajó IE, Gács I, Sharma PK, Banerji KK. Convenient Routes for the Preparation of Barium Permanganate and other Permanganate Salts. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200700142] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
43
|
|
44
|
Lukovits I, Fodor J, Gömöry A, István K, Keresztury G, Kótai L. Alkane isomers: presence in petroleum ether and complexity. SAR QSAR Environ Res 2006; 17:323-35. [PMID: 16815771 DOI: 10.1080/10659360600787791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The presence and absence of alkane isomers in petroleum and petroleum derivatives depend on the complexity of these structures. It was assumed that the more complex the structure is the less probable it is that that the molecule can be detected in any petroleum derivative. Complexity is a vague concept, which has not been defined in quantitative terms yet, and therefore there is no experimental method, which could be used to determine 'complexity'. Mass spectrometry and infrared spectroscopy in combination with gas chromatography were used to identify the various structural isomers of alkanes in petroleum ether. The isomers were categorised in quantitative terms by using topological indices and linear discriminant analysis. It was found that alkanes possessing a more complex, highly branched structure are less probable to be detected in petroleum ether than isomers with a simpler backbone structure. It was proposed that the experimental 'measure' of the complexity of isomer(i) should be proportional to 1/C(i), where C(i), denotes the concentration of isomer(i) in a (primary) petroleum derivative.
Collapse
Affiliation(s)
- I Lukovits
- Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, H-1525, Budapest, Hungary.
| | | | | | | | | | | |
Collapse
|
45
|
Kótai L, Sajó IE, May Z, Gács I, Fodor J. A Convenient Method to Prepare Alkali- and Chloride-free Ammonium Metavanadate (NH4VO3). CHEM LETT 2006. [DOI: 10.1246/cl.2006.384] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
46
|
Kótai L, Fodor J, Jakab E, Sajó I, Szabó P, Lónyi F, Valyon J, Gács I, Argay G, Banerji KK. A Thermally Induced Low-temperature Intramolecular Redox Reaction of bis(pyridine)silver(I) Permanganate and its hemipyridine Solvate. TRANSIT METAL CHEM 2006. [DOI: 10.1007/s11243-005-6322-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
47
|
Szentmihályi K, Hajdú M, Fodor J, Kótai L, Blázovics A, Somogyi A, Then M. In vitro study of elements in herbal remedies. Biol Trace Elem Res 2006; 114:143-50. [PMID: 17205997 DOI: 10.1385/bter:114:1:143] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2005] [Revised: 01/18/2006] [Accepted: 02/24/2006] [Indexed: 11/11/2022]
Abstract
Decreased glucose tolerance is a first sign of diabetes mellitus and therefore rigorous control must be taken in carbohydrate and lipid metabolisms. Herbal remedies (lyophilized extracts of Myrtilli folium and Phaseoli fructus sine seminibus (L1), Myrtilli folium, Phaseoli fructus sine seminibus, and Salviae folium (L2) are traditionally used in mid-European folk medicine and in common adjuvant therapy for the prevention of complications in type 2 diabetes. Significant iron (355.7 +/- 13.8 mg/kg) and zinc (84.73 +/- 1.83 mg/kg) concentration was found in L1 and chromium (3.82 +/- 2.71 mg/kg) in L2. Ion concentrations in teas made from L1 and L2 are relatively low because the quantities of metal ions in teas do not cover the daily need, although the teas are good sources for some elements. According to the Recommended Daily Allowances, the tea of L1 is a good source for iron and manganese, whereas for chromium, the tea of L2 is better. For evaluating the element bioavailability, an in vitro dialysis system was applied to determine the element transfer from tea of the lyophilized sample to the plasma (buffer pH=7.4). Measurements showed that the elements transferred between 6.90% (iron from tea of L2) and 90.05% (chromium from tea of L2) through the membrane from teas to the plasma. Metal ions in teas of herbal remedies might contribute to the favorable therapeutic effect of preventing complications, because they might transfer through the membranes in relatively high percentages.
Collapse
Affiliation(s)
- K Szentmihályi
- Institute of Material and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, 1525 Budapest, P.O. Box 17, Hungary
| | | | | | | | | | | | | |
Collapse
|
48
|
Shukla R, Kótai L, Sharma PK, Banerji KK. Kinetics and mechanism of the oxidative regeneration of carbonyl compounds from phenylhydrazones by tetramminecopper(2+) bis (permanganate). J Chem Res (S) 2003. [DOI: 10.3184/030823403103173660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
49
|
Shukla R, Kótai L, Sharma PK, Banerji KK. Kinetics and mechanism of the Oxidative regeneration of Carbonyl Compounds from Phenylhydrazones by Tetramminecopper(2+) Bis (Permanganate). Journal of Chemical Research 2003. [DOI: 10.1177/1747519803200300401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The oxidation of aldo- and keto-phenylhydrazones by tetraamminecopper(2+) bis(permanganate) (TACP), in aqueous acetic acid, proceeds through a mechanism involving the formation of a cyclic activated complex, in the rate-determining step.
Collapse
Affiliation(s)
| | - László Kótai
- Institute of Chemistry, Chemical Research Centre, Hungarian Academy of Sciences, H-1025, Budapest, Pusztaseri u. 59-67, Hungary
| | | | | |
Collapse
|
50
|
|