Search results for: Katarína Györyová

Items from 1 to 20 out of 24 results

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Synthesis, crystal structures, spectral, thermal and antimicrobial properties of new Zn(II) 5-iodo- and 5-bromosalicylates

Petra Košická, Katarína Győryová, Lukáš Smolko, Róbert Gyepes, more

Journal of Molecular Structure > 2018 > 1155 > C > 232-238

Two new analogous zinc(II) complexes containing 5-iodo- and 5-bromosalicylate ligands, respectively, were prepared in single-crystal form and characterized by IR spectroscopy, thermal analysis and elemental analysis. The solid-state structures of prepared complexes were determined by single crystal X-ray crystallography. Both complexes are isostructural and their crystal structures composed of neutral...

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Synthesis, thermal, spectral, and biological properties of zinc(II) 4-aminobenzoate complexes

Katarína Homzová, Katarína Győryová, Daniela Hudecová, Marián Koman, more

Journal of Thermal Analysis and Calorimetry > 2017 > 129 > 2 > 1065-1082

New zinc(II) 4-aminobenzoate complex compounds with general formula [Zn(4-NH₂benz)₂L₂]·nH₂O, where 4-NH₂benz = 4-aminobenzoate; L = nicotinamide (nad), isonicotinamide (inad), N-methylnicotinamide (mnad), thiourea (tu), urea (u), theophylline (tph), and caffeine (caf); n = 0–2; were synthesised and characterised by elemental analysis, thermal analysis, and IR spectroscopy. The thermal behaviour of...

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Synthesis, crystal structure, and spectroscopic and thermal properties of the polymeric compound catena‐poly[[bis(2,4‐dichlorobenzoato)zinc(II)]‐μ‐isonicotinamide]

Katarína Homzová, Katarína Györyová, Marián Koman, Milan Melník, more

Acta Crystallographica Section C > 71 > 9 > 814 - 819

Zinc(II) carboxylates with O‐, S‐ and N‐donor ligands are interesting for their structural features, as well as for their antibacterial and antifungal activities. The one‐dimensional zinc(II) coordination complex catena‐poly[[bis(2,4‐dichlorobenzoato‐κO)zinc(II)]‐μ‐isonicotinamide‐κ²N¹:O], [Zn(C₇H₃Cl₂O₂)₂(C₆H₆N₂O)]_n, has been prepared and characterized by IR spectroscopy, single‐crystal X‐ray analysis...

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Thermal behaviour and antimicrobial assay of some new zinc(II) 2-aminobenzoate complex compounds with bioactive ligands

Annamária Krajníková, Andrei Rotaru, Katarína Győryová, Katarína Homzová, more

Journal of Thermal Analysis and Calorimetry > 2015 > 120 > 1 > 73-83

New zinc(II) 2-aminobenzoate complexes with general formula Zn(2-NH ₂ benz) ₂ (L) ₂ (where 2-NH ₂ benz is 2-aminobenzoate, and L is phenazone, N -methylnicotinamide, nicotinamide and isonicotinamide) were prepared and characterized by elemental analysis and by FTIR spectroscopy. The stability and thermal behaviour of the compounds...

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Synthesis, thermal, spectral and biological properties of zinc(II) 4-hydroxybenzoate complexes

Katarína Homzová, Katarína Győryová, Zuzana Bujdošová, Daniela Hudecová, more

Journal of Thermal Analysis and Calorimetry > 2014 > 116 > 1 > 77-91

New zinc(II) 4-hydroxybenzoate complex compounds with general formula [Zn(4-OHbenz)₂L_n]·xH₂O, where 4-OHbenz = 4-hydroxybenzoate; L = isonicotinamide, N-methylnicotinamide, N,N-diethylnicotinamide, thiourea, urea, phenazone, theophylline, methyl-3-pyridylcarbamate; n = 2, 3; x = 0–3, 5, were synthesized and characterised by elemental analysis, thermal analysis and IR spectroscopy. The thermal behaviour...

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Thermal decomposition study and biological characterization of zinc(II) 2-chlorobenzoate complexes with bioactive ligands

Lenka Findoráková, Katarína Győryová, Daniela Hudecová, Dagmar Mudroňová, more

Journal of Thermal Analysis and Calorimetry > 2013 > 111 > 3 > 1771-1781

New zinc(II) 2-chlorobenzoates of general formula [Zn(2-ClC₆H₄COO)₂(L)₂] (where L = caffeine—caf, urea—u, methyl-3-pyridylcarbamate—mpc, phenazone—phen, theophylline—thp) were synthesised and characterised by elemental analysis and IR spectroscopy. The thermal behaviour of the complexes was studied by TG/DTG and DTA methods in nitrogen and in air atmosphere. During the thermal decomposition of the...

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Thermoanalytical investigation and biological properties of zinc(II) 4-chloro- and 5-chlorosalicylates with N-donor ligands

Zuzana Bujdošová, Katarína Győryová, Dagmar Mudroňová, Daniela Hudecová, more

Journal of Thermal Analysis and Calorimetry > 2012 > 110 > 1 > 167-176

New zinc(II) 4- and 5-chlorosalicylate complexes of general formula [Zn(X-sal)₂(L)_n(H₂O)_x] (where X-sal = 4-Clsalicylate, 5-Clsalicylate; L = N,N-diethylnicotinamide, isonicotinamide, theophylline; n = 1, 2; x = 0, 1, 2, 4) were prepared. The complexes were determined by elemental analysis and characterised by infrared spectroscopy. The thermal behaviour of the complexes was studied by simultaneous...

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Thermoanalytical, spectral and biological study of 4-bromobenzoatozinc(II) complexes containing bioactive organic ligands

Annamária Krajníková, Katarína Győryová, Jana Kovářová, Daniela Hudecová, more

Journal of Thermal Analysis and Calorimetry > 2012 > 110 > 1 > 177-185

New zinc(II) 4-bromobenzoate complex compounds with general formula [Zn(4-BrC₆H₄COO)₂L₂]·xH₂O (where L = urea, nicotinamide, phenazone or thiourea, x = 0–2) were prepared and characterized by elemental analysis, IR spectroscopy and thermal analysis. The thermal decomposition of hydrated compounds started with dehydration process. During the thermal decomposition, the neutral organic ligand, bis(4-bromophenyl)methanone...

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Preparation, Crystal Structure and Spectroscopic Properties of Dimeric [Zn(2-bromobenzoato)₂(phenazone)]₂ and Monomeric [Zn(2-bromobenzoato)₂(thiourea)₂]·2H₂O

Annamária Krajníková, Róbert Gyepes, Katarína Győryová, Jan Šubrt, more

Journal of Chemical Crystallography > 2011 > 41 > 7 > 1036-1043

The binuclear zinc complex bis(2-bromobenzoato-O)-bis(μ ₂-2-bromobenzoato-O,O′)-bis(phenazone-O)-dizinc(II) (I) and the mononuclear dihydrate bis(2-bromobenzoato-O)-bis(thiourea-S)-zinc(II) (II) have been synthesized and characterized by means of elemental analysis and spectroscopic methods (IR, ¹H and ¹³C NMR, EDS). The solid state structures of both compounds were determined by single-crystal...

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Structures and Characterization of [Zn(n-chlorosalicylato)₂(N-methylnicotinamide)₂(H₂O)₂] (n = 4 or 5) Ligand Isomers

Zuzana Bujdošová, Katarína Győryová, Milan Melník, Marian Koman, more

Journal of Chemical Crystallography > 2011 > 41 > 4 > 443-448

Two ligand isomers [Zn{4-ClC₆H₃-2-(OH)COO}₂(Menia)₂(H₂O)₂] (I) and [Zn{5-ClC₆H₃-2-(OH)COO}₂(Menia)₂(H₂O)₂] (II) (Menia = N-methylnicotinamide) were prepared and characterized by elemental analysis, IR spectroscopy and thermal analysis. The X-ray crystal structures of complexes (I) and (II) were determined. Compound (I) crystallizes in the triclinic space group $$ P\bar{1} $$ with a = 8.105(1)...

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Crystal Structures of Two Aromatic Zinc(II) Carboxylates: [Zn(4-Chlorosalicylato)₂(H₂O)₄]·2theophylline·(H₂O)₂ and Unique [Zn(5-Chlorosalicylato)₂(isonicotinamide)₂(H₂O)]

Zuzana Bujdošová, Katarína Győryová, Aleš Růžička, Milan Melník, more

Journal of Chemical Crystallography > 2011 > 41 > 7 > 1077-1084

The crystal structures of two zinc(II) 4-chloro- and 5-chlorosalicylate complexes, [Zn(4-ClC₆H₃-2-(OH)COO)₂(H₂O)₄]·2tph·(H₂O)₂ (I) and [Zn(5-ClC₆H₃-2-(OH)COO)₂(ina)₂(H₂O)] (II), where tph is theophylline and ina is isonicotinamide, have been determined using X-ray diffraction methods. Crystals of both (I) and (II) are triclinic, space group P-1, with Z = 1 in a cell with a = 7.2220(3), b = 8.59700(10),...

article

Thermal decomposition and antimicrobial activity of zinc(II) 2-bromobenzoates with organic ligands

Annamária Krajníková, Katarína Győryová, Daniela Hudecová, Jana Kovářová, more

Journal of Thermal Analysis and Calorimetry > 2011 > 105 > 2 > 451-460

New zinc(II) 2-bromobenzoate complex compounds with general formula Zn(2-BrC₆H₄COO)₂·nL·xH₂O (where L = urea, nicotinamide, N-methylnicotinamide, N,N-diethylnicotinamide, isonicotinamide, phenazone n = 0–2, x = 0–2) were prepared and characterized by elemental analysis, IR spectroscopy and thermal analysis. The thermal decomposition of hydrated compounds started with dehydration process. During the...

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Matrix assisted pulsed laser evaporation of zinc benzoate for ZnO thin films and non-isothermal decomposition kinetics

A. Rotaru, C. Constantinescu, Anca Mândruleanu, P. Rotaru, more

Thermochimica Acta > 2010 > 498 > 1-2 > 81-91

Zinc(II) coordination compounds may provide a better source for ZnO thin films obtaining, since ZnO was found as the final product of their thermal decomposition. Thin films of zinc benzoate have been obtained on silicon substrates by matrix assisted pulsed laser evaporation (MAPLE) technique, using a Nd:YAG laser working at 266nm. A comparative study of 1% zinc benzoate frozen solution in methanol...

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Crystal Structure and Physical Characterisation of [Zn₂(Benzoato)₄(Caffeine)₂]·2 Caffeine

Lenka Findoráková, Katarína Győryová, Marian Koman, Jan Moncol, more

Journal of Chemical Crystallography > 2010 > 40 > 2 > 145-150

The crystal structure of [Zn₂(benzoato)₄(caffeine)₂]·(caffeine)₂ was determined by direct method and Fourier technique. The structure was refined by full-matrix least-squares method to a weighted R factor of 0.0582. The structure consists of centrosymmetric dimeric units where the two zinc(II) atoms are coordinated by four bridging benzoates in a syn–syn arrangement and two caffeine ligands at the...

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Crystal Structure of [Zn(2-Bromobenzoato)₂]_n and [Zn(2-Bromobenzoato)₂(N-Methylnicotinamide)]₂

Annamária Krajníková, Róbert Gyepes, Katarína Győryová

Journal of Chemical Crystallography > 2010 > 40 > 8 > 650-655

The syntheses and structural characterizations of two novel 2-bromobenzoatozinc(II) complexes—[Zn(2-BrC₆H₄COO)₂]_n (I) and [Zn(2-BrC₆H₄COO)₂(mnad)]₂ (II), where mnad is N-methylnicotinamide are reported. Compound (I) crystallized with a monoclinic lattice (space group P2₁/c) and is polymeric in solid state. Its cell parameters are: a = 7.37220(10) Å, b = 19.9639(3) Å, c = 30.2756(5) Å, β = 94.7510(7)°,...

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Preparation, spectral, thermal, and biological properties of zinc(II) 4-chloro- and 5-chlorosalicylate complexes with methyl 3-pyridylcarbamate and phenazone

Zuzana Bujdošová, Katarína Györyová, Daniela Hudecová, Jana Kovářová, more

Chemical Papers > 2010 > 64 > 5 > 584-591

New zinc(II) 4-chloro- and 5-chlorosalicylate complex compounds of the general formula ((4- or 5-Cl)C₆H₃(2-OH)COO)₂Zn · L_n (where L = methyl 3-pyridylcarbamate, phenazone; n = 2, 4) were prepared and characterized by elemental analysis, thermal analysis (TG/DTG, DTA), and IR spectroscopy. During thermal decomposition, mpc, phen, chlorosalicylic acid, chlorophenol, carbon dioxide, and carbon monoxide...

article

Synthesis, spectral, thermal and structural study of bis(2-bromobenzoato-O,O′)-bis(methyl-3-pyridylcarbamate-N)-zinc(II)

Annamária Erdélyiová, Katarína Győryová, Róbert Gyepes, Ladislav Halás, more

Polyhedron > 2009 > 28 > 1 > 131-137

The new complex bis(2-bromobenzoato-O,O′)-bis(methyl-3-pyridylcarbamate-N)-zinc(II), [Zn(2-BrC ₆ H ₄ COO) ₂ mpc ₂ ] (1), has been prepared and characterized by elemental analysis, IR spectroscopy, thermal analysis and single-crystal X-ray diffraction. The bonding between the ligands and the central atom was investigated by DFT studies. The theoretical infrared spectrum...

article

Synthesis, biological and physicochemical properties of Zinc(II) salicylate and 5-chlorosalicylate complexes with theophylline and urea

Zuzana Bujdošová, Katarína Győryová, Jana Kovářová, Daniela Hudecová, more

Journal of Thermal Analysis and Calorimetry > 2009 > 98 > 1 > 151-159

New zinc(II) salicylate complex compounds of general formula (X-C₆H₃-2-(OH)COO)₂Zn · L_n · xH₂O (where X = H, 5-Cl; L = theophylline, urea; n = 2, 4; x = 1, 2, 4) were prepared and their thermal, spectral and biological properties were studied. It was found that the thermal decomposition of hydrated compounds starts with the release of water. During the thermal decomposition of anhydrous compounds,...

article

Novel zinc(II) benzoate complex compounds with caffeine and urea

Lenka Findoráková, Katarína Győryová, Jana Kovářová, V. Balek, more

Journal of Thermal Analysis and Calorimetry > 2009 > 95 > 3 > 923-928

Novel zinc(II) complex compounds of general formula Zn(C₆H₅COO)₂·L₂ (where L=caffeine (caf) and urea (u)) were synthesized and characterized by elemental analysis and IR spectroscopy. The thermal behaviour of the complexes was studied during heating in air by thermogravimetry. It was found that the thermal decomposition of the anhydrous Zn(II) benzoate compounds with bioactive ligands was initiated...

article

Use of emanation thermal analysis and evolved gas analysis in thermal study of zinc(II) benzoate complex compounds

Lenka Findoráková, Katarína Győryová, Eva Večerníková, Vladimír Balek

Journal of Thermal Analysis and Calorimetry > 2009 > 98 > 3 > 765-769

Thermal behaviours of three zinc(II) benzoate complex compounds (two new with caffeine and urea), namely Zn(C₆H₅COO)₂, Zn(C₆H₅COO)₂·caf₂, Zn(C₆H₅COO)₂·u₂, were characterized by using thermogravimetry (TG/DTG), differential thermal analysis (DTA), evolved gas analysis (EGA) with mass spectrometry (MS) detection and emanation thermal analysis (ETA). Temperature intervals of the stability of the compounds...

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Search results for: Katarína Györyová

Synthesis, crystal structures, spectral, thermal and antimicrobial properties of new Zn(II) 5-iodo- and 5-bromosalicylates

Synthesis, thermal, spectral, and biological properties of zinc(II) 4-aminobenzoate complexes

Synthesis, crystal structure, and spectroscopic and thermal properties of the polymeric compound catena‐poly[[bis(2,4‐dichlorobenzoato)zinc(II)]‐μ‐isonicotinamide]

Thermal behaviour and antimicrobial assay of some new zinc(II) 2-aminobenzoate complex compounds with bioactive ligands

Synthesis, thermal, spectral and biological properties of zinc(II) 4-hydroxybenzoate complexes

Thermal decomposition study and biological characterization of zinc(II) 2-chlorobenzoate complexes with bioactive ligands

Thermoanalytical investigation and biological properties of zinc(II) 4-chloro- and 5-chlorosalicylates with N-donor ligands

Thermoanalytical, spectral and biological study of 4-bromobenzoatozinc(II) complexes containing bioactive organic ligands

Preparation, Crystal Structure and Spectroscopic Properties of Dimeric [Zn(2-bromobenzoato)₂(phenazone)]₂ and Monomeric [Zn(2-bromobenzoato)₂(thiourea)₂]·2H₂O

Structures and Characterization of [Zn(n-chlorosalicylato)₂(N-methylnicotinamide)₂(H₂O)₂] (n = 4 or 5) Ligand Isomers

Crystal Structures of Two Aromatic Zinc(II) Carboxylates: [Zn(4-Chlorosalicylato)₂(H₂O)₄]·2theophylline·(H₂O)₂ and Unique [Zn(5-Chlorosalicylato)₂(isonicotinamide)₂(H₂O)]

Thermal decomposition and antimicrobial activity of zinc(II) 2-bromobenzoates with organic ligands

Matrix assisted pulsed laser evaporation of zinc benzoate for ZnO thin films and non-isothermal decomposition kinetics

Crystal Structure and Physical Characterisation of [Zn₂(Benzoato)₄(Caffeine)₂]·2 Caffeine

Crystal Structure of [Zn(2-Bromobenzoato)₂]_n and [Zn(2-Bromobenzoato)₂(N-Methylnicotinamide)]₂

Preparation, spectral, thermal, and biological properties of zinc(II) 4-chloro- and 5-chlorosalicylate complexes with methyl 3-pyridylcarbamate and phenazone

Synthesis, spectral, thermal and structural study of bis(2-bromobenzoato-O,O′)-bis(methyl-3-pyridylcarbamate-N)-zinc(II)

Synthesis, biological and physicochemical properties of Zinc(II) salicylate and 5-chlorosalicylate complexes with theophylline and urea

Novel zinc(II) benzoate complex compounds with caffeine and urea

Use of emanation thermal analysis and evolved gas analysis in thermal study of zinc(II) benzoate complex compounds

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