Hayati Sari | Tokat Gaziosmanpaşa Üniversity (original) (raw)
Papers by Hayati Sari
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Polymer Bulletin, 2019
In this work, we successfully synthesized silver-doped polyaniline (NPANI-Ag-X; X represents I − ... more In this work, we successfully synthesized silver-doped polyaniline (NPANI-Ag-X; X represents I − and BF 4 − dopants,) by using chemical oxidation polymerization in various solvent media, which are deionized water, dimethylformamide, acetonitrile, 1,4-dioxane, tetrahydrofuran and acetone to give new features into polyaniline (PANI). Then, the solvent effects on the formation of NPANI-Ag-X were investigated. Most of the solvents used in the syntheses show ligand properties and form complexes with metal ions. According to their stability, these complexes can inhibit the reactions of metal ions. Polymer samples were characterized by using scanning electron microscopy, X-ray diffractions, energy-dispersive X-ray analysis, Fourier transform infrared spectrometry, atomic absorption spectrometer, ultraviolet-visible spectrophotometers, thermal analysis (TGA, DTA) and electrical conductivity measurements. The experimental results obtained show that some properties such as crystallinity, conductivity, metal contents and surface area of PANI polymers have changed with the addition of silver to the polymer. Studies have also shown that these properties can be controlled by the exchange of metal ions and solution media. It was observed that the solvents were effective in adding metal to the polymer and the amount of metal in the synthesized polymers varied depending on the solvent used.
Bioorganic & medicinal chemistry letters, 2018
In this study, a series of polysubstituted methyl 5,5-diphenyl-1-(thiazol-2-yl)pyrrolidine-2-carb... more In this study, a series of polysubstituted methyl 5,5-diphenyl-1-(thiazol-2-yl)pyrrolidine-2-carboxylate derivatives were designed and synthesized by the cyclization reaction of methyl 1-(benzoylcarbamothioyl)-5,5-diphenylpyrrolidine-2-carboxylates and 2-bromo-1-(4-substituted phenyl)ethanones in 70-96% yield. The starting pyrrolidine derivatives were synthesized via a 1,3-dipolar cycloaddition reaction in 83-88% yield. The stereochemistry of one of these methyl 5,5-diphenyl-1-(thiazol-2-yl)pyrrolidine-2-carboxylate derivatives was characterized by a single crystal X-ray diffraction study and the acid dissociation constants of these compounds were determined. An antimicrobial screening was performed against different bacterial and fungal strains and against the M. tuberculosis H37Rv strain. Interesting antibacterial activity was observed for two compounds against the A. baumannii strain with MIC values of 31.25 µg/mL (Ampicillin: 125 µg/mL) and against the M. tuberculosis H37Rv stra...
Analytical Letters, Jan 6, 2003
Journal of Chemical & Engineering Data
Pakistan Journal of Agricultural Sciences
In this study, the heavy metal contents and egg quality characteristics of chicken eggs was studi... more In this study, the heavy metal contents and egg quality characteristics of chicken eggs was studied. The eggs have been collected at distances of 0-100 (Distance A), 100-200 (Distance B) and 200-300 m (Distance C) away from the edge of Tokat-Turhal road. The distance from roadway had no significant effect on egg Cu and Mn contents (P>0.05), although a significant effect on egg Cd and Pb content (P<0.05) was observed. There were no significant difference in egg shape index, egg shell thickness, breakage strength, egg albumin pH, albumin index, Haugh units and yolk index according to distance from the roadway (P> 0.05). Eggs obtained from distance A and B had significantly higher weight than obtained from distance C (P<0.05). Egg obtained from distance B had significantly lower egg shell colour scales than those of the other distances (P<0.01). And, egg yolk colour was showed a significant variation among the distances away from the roadway, and the highest yolk colour ...
Energy Conversion and Management, 2004
The present study deals with two subjects. The first one is to determine the thermal properties o... more The present study deals with two subjects. The first one is to determine the thermal properties of lauric acid (LA)stearic acid (SA), myristic acid (MA)palmitic acid (PA) and palmitic acid (PA)stearic acid (SA) eutectic mixtures as latent heat storage material. The properties ...
Journal of Chemical & Engineering Data, 2005
Calcium ion-selective electrodes based on the ionophore ETH1001 have been used to obtain free cal... more Calcium ion-selective electrodes based on the ionophore ETH1001 have been used to obtain free calcium ion levels, and hence by data fitting, metal-ligand stability constants in the presence of phthalate, maleate, malonate, oxalate, diglyconate, and tartrate under the conditions of a background ionic strength of 0.1 mol dm-3 NaCl and (25 (0.5)°C. The dissociation constants for the acids and the stability constants for calcium ion-ligand complexes, for comparison with the calcium ion-selective results, were separately determined with pH electrodes under the same conditions.
Transition Metal Chemistry, 2007
The stoichiometry and stability constant of metal complexes with 4-(3-methoxy-salicylideneamino)-... more The stoichiometry and stability constant of metal complexes with 4-(3-methoxy-salicylideneamino)-5-hydroxynaphthalene-2,7-disulfonic acid monosodium salt (H 2 L) and 4-(3-methoxysalicylideneamino)-5-hydroxy-6-(2,5dichlorophenylazo)-2,7-naphthalene disulfonic acid monosodium salt (H 2 L 1) were studied by potentiometric titration. The stability constants of H 2 L and H 2 L 1 Schiff bases have been investigated by potentiometric titration and u.v.-vis spectroscopy in aqueous media. The dissociation constants of the ligand and the stability constants of the metal complexes were calculated pH-metrically at 25°C and 0.1 M KCl ionic strength. The dissociation constants for H 2 L were obtained as 3.007, 7.620 and 9.564 and for H 2 L 1 , 4.000, 6.525, 9.473 and 10.423, respectively. The complexes were found to have the formulae [M(L) 2 ] for M = Co(II), Ni(II), Zn(II) and Cu(II). The stability of the complexes follows the sequence: Zn(II) < Co(II) < Cu(II) < Ni(II). The high stability of H 2 L 1 towards Cu(II) and Ni(II) over the other ions is remarkable, in particular over Cu(II), and may be of technological interest. Concentration distribution diagram of various species formed in solution was evaluated for ligands and complexes. The formation of the hydrogen bonds may cause this increased stability of ligands. The pH-metric data were used to find the stoichiometry, deprotonation and stability constants via the SUPERQUAD computer program.
Agrochimica, 2005
One of the most important sources of trace metals in agricultural soils is mineral fertilizer. A ... more One of the most important sources of trace metals in agricultural soils is mineral fertilizer. A large quantity of fertilizers containing trace metals has ben used under farming systems in Turkey and world since years. Inthis research, cadmium (Cd) lead (Pb), nickel (Ni), copper (Cu), zinc (Zn), iron (Fe), manganese (Mn) concentrations in sixteen solid fertilizer samples, which produced in different fertilizers factories in Turkey, were analysed and trace metals contamination risk was evaluated in Turkish soils. Phosphorus fertilizers contain trace metals at concentration above those found in all other fertilizers, and ammonium nitrates and urea fertilizers contained the lowest levels of trace metals. Trace metals concentrations, except Cd, in fertilizers were lower than the median soil trace metals values. Taking into consideration the calcareous and basic soil properties in Turkish soils, trace metal toxicity due to fertilizers use is not expected to be a major problem at present....
Journal of Food and Drug Analysis, 2020
Comparison of microwave, dry and wet digestion procedures for Comparison of microwave, dry and we... more Comparison of microwave, dry and wet digestion procedures for Comparison of microwave, dry and wet digestion procedures for the determination of trace metal contents in spice samples the determination of trace metal contents in spice samples
Bioorganic Chemistry, 2020
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Journal of Molecular Liquids, 2018
In this paper, five novel 1,4-naphthoquinone N-aroylthiourea derivatives were synthesized, by the... more In this paper, five novel 1,4-naphthoquinone N-aroylthiourea derivatives were synthesized, by the reaction of 2,3-diaminonaphthalene-1,4-dione and aroylisothiocyanates, in excellent yield (88-96%) and characterized by using FT-IR, 1 H/ 13 C NMR and HRMS. In addition, the molecular structure of one of the 1,4-naphthoquinone N-aroylthiourea compounds was characterized by single crystal X-ray diffraction studies. The absorption spectra of the compounds were determined in DMSO and the dyes have absorption in visible region in the range of 464-477 nm. The chemosensing ability of each of the prepared dyes was assessed by titrating them towards the anions; F
![Research paper thumbnail of Synthesis, crystal structure, DFT studies, acid dissociation constant, and antimicrobial activity of methyl 2-(4-chlorophenyl)-7a-((4-chlorophenyl)carbamothioyl)-1-oxo-5,5-diphenyl-3-thioxo-hexahydro-1H-pyrrolo[1,2-e]imidazole-6-carboxylate](https://attachments.academia-assets.com/97722475/thumbnails/1.jpg)
](Journal of Molecular Structure, 2018
, crystal structure, DFT studies, acid dissociation constant, and antimicrobial activity of methy... more , crystal structure, DFT studies, acid dissociation constant, and antimicrobial activity of methyl 2-(4-chlorophenyl)-7a-((4-chlorophenyl) carbamothioyl)-1-oxo-5,5-diphenyl-3-thioxo-hexahydro-1H-pyrrolo[1,2-e]imidazole-6-carboxylate
![Research paper thumbnail of Pt(II) and Ni(II) complexes of octahydropyrrolo[3,4-c]pyrrole N-benzoylthiourea derivatives: Synthesis, characterization, physical parameters and biological activity](https://attachments.academia-assets.com/97722478/thumbnails/1.jpg)
](Inorganica Chimica Acta, 2017
This is a PDF file of an unedited manuscript that has been accepted for publication. As a service... more This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Pt(II) and Ni(II) complexes of octahydropyrrolo[3,4-c]pyrrole N-benzoylthiourea derivatives: Synthesis, characterization, physical parameters and biological activity
Acta Chimica Slovenica, 2003
The deprotonation constants of 1-benzyl-4-piperazineglyoxime (BPGO) and 1-methyl-4piperazineglyox... more The deprotonation constants of 1-benzyl-4-piperazineglyoxime (BPGO) and 1-methyl-4piperazineglyoxime have been determined in 0.1 mol dm-3 NaCl at 25 °C potentiometrically (Molspin). The pK a values have been found as 9.79, 7.04 and 3.19 for BPGO and 9.56, 7.62 and 3.01 for MPGO in acidic medium. Protonation order of nitrogen atoms in the ligands has been determined by theoretical calculation (Semi-empirical AM1 method). In various pH conditions, the different complexes, which are formulated as MH
Http Dx Doi Org 10 1081 Al 120021095, Feb 2, 2007
Acta Chimica Slovenica, 2005
The dissociation constants of 1,2-bis(4-methylpiperazine)glyoxime (BMPGH2) and 1,2-bis(4-benzylpi... more The dissociation constants of 1,2-bis(4-methylpiperazine)glyoxime (BMPGH2) and 1,2-bis(4-benzylpiperazine)gly oxime (BBPGH2) were determined in 0.1 mol dm-3 NaCl and 0.001 mol dm-3 HCl at 25 °C potentiometrically. pK a values of BMPGH2 and BBPGH2 were obtained as 2.91
Trace Elements and Electrolytes, 2005
An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Polymer Bulletin, 2019
In this work, we successfully synthesized silver-doped polyaniline (NPANI-Ag-X; X represents I − ... more In this work, we successfully synthesized silver-doped polyaniline (NPANI-Ag-X; X represents I − and BF 4 − dopants,) by using chemical oxidation polymerization in various solvent media, which are deionized water, dimethylformamide, acetonitrile, 1,4-dioxane, tetrahydrofuran and acetone to give new features into polyaniline (PANI). Then, the solvent effects on the formation of NPANI-Ag-X were investigated. Most of the solvents used in the syntheses show ligand properties and form complexes with metal ions. According to their stability, these complexes can inhibit the reactions of metal ions. Polymer samples were characterized by using scanning electron microscopy, X-ray diffractions, energy-dispersive X-ray analysis, Fourier transform infrared spectrometry, atomic absorption spectrometer, ultraviolet-visible spectrophotometers, thermal analysis (TGA, DTA) and electrical conductivity measurements. The experimental results obtained show that some properties such as crystallinity, conductivity, metal contents and surface area of PANI polymers have changed with the addition of silver to the polymer. Studies have also shown that these properties can be controlled by the exchange of metal ions and solution media. It was observed that the solvents were effective in adding metal to the polymer and the amount of metal in the synthesized polymers varied depending on the solvent used.
Bioorganic & medicinal chemistry letters, 2018
In this study, a series of polysubstituted methyl 5,5-diphenyl-1-(thiazol-2-yl)pyrrolidine-2-carb... more In this study, a series of polysubstituted methyl 5,5-diphenyl-1-(thiazol-2-yl)pyrrolidine-2-carboxylate derivatives were designed and synthesized by the cyclization reaction of methyl 1-(benzoylcarbamothioyl)-5,5-diphenylpyrrolidine-2-carboxylates and 2-bromo-1-(4-substituted phenyl)ethanones in 70-96% yield. The starting pyrrolidine derivatives were synthesized via a 1,3-dipolar cycloaddition reaction in 83-88% yield. The stereochemistry of one of these methyl 5,5-diphenyl-1-(thiazol-2-yl)pyrrolidine-2-carboxylate derivatives was characterized by a single crystal X-ray diffraction study and the acid dissociation constants of these compounds were determined. An antimicrobial screening was performed against different bacterial and fungal strains and against the M. tuberculosis H37Rv strain. Interesting antibacterial activity was observed for two compounds against the A. baumannii strain with MIC values of 31.25 µg/mL (Ampicillin: 125 µg/mL) and against the M. tuberculosis H37Rv stra...
Analytical Letters, Jan 6, 2003
Journal of Chemical & Engineering Data
Pakistan Journal of Agricultural Sciences
In this study, the heavy metal contents and egg quality characteristics of chicken eggs was studi... more In this study, the heavy metal contents and egg quality characteristics of chicken eggs was studied. The eggs have been collected at distances of 0-100 (Distance A), 100-200 (Distance B) and 200-300 m (Distance C) away from the edge of Tokat-Turhal road. The distance from roadway had no significant effect on egg Cu and Mn contents (P>0.05), although a significant effect on egg Cd and Pb content (P<0.05) was observed. There were no significant difference in egg shape index, egg shell thickness, breakage strength, egg albumin pH, albumin index, Haugh units and yolk index according to distance from the roadway (P> 0.05). Eggs obtained from distance A and B had significantly higher weight than obtained from distance C (P<0.05). Egg obtained from distance B had significantly lower egg shell colour scales than those of the other distances (P<0.01). And, egg yolk colour was showed a significant variation among the distances away from the roadway, and the highest yolk colour ...
Energy Conversion and Management, 2004
The present study deals with two subjects. The first one is to determine the thermal properties o... more The present study deals with two subjects. The first one is to determine the thermal properties of lauric acid (LA)stearic acid (SA), myristic acid (MA)palmitic acid (PA) and palmitic acid (PA)stearic acid (SA) eutectic mixtures as latent heat storage material. The properties ...
Journal of Chemical & Engineering Data, 2005
Calcium ion-selective electrodes based on the ionophore ETH1001 have been used to obtain free cal... more Calcium ion-selective electrodes based on the ionophore ETH1001 have been used to obtain free calcium ion levels, and hence by data fitting, metal-ligand stability constants in the presence of phthalate, maleate, malonate, oxalate, diglyconate, and tartrate under the conditions of a background ionic strength of 0.1 mol dm-3 NaCl and (25 (0.5)°C. The dissociation constants for the acids and the stability constants for calcium ion-ligand complexes, for comparison with the calcium ion-selective results, were separately determined with pH electrodes under the same conditions.
Transition Metal Chemistry, 2007
The stoichiometry and stability constant of metal complexes with 4-(3-methoxy-salicylideneamino)-... more The stoichiometry and stability constant of metal complexes with 4-(3-methoxy-salicylideneamino)-5-hydroxynaphthalene-2,7-disulfonic acid monosodium salt (H 2 L) and 4-(3-methoxysalicylideneamino)-5-hydroxy-6-(2,5dichlorophenylazo)-2,7-naphthalene disulfonic acid monosodium salt (H 2 L 1) were studied by potentiometric titration. The stability constants of H 2 L and H 2 L 1 Schiff bases have been investigated by potentiometric titration and u.v.-vis spectroscopy in aqueous media. The dissociation constants of the ligand and the stability constants of the metal complexes were calculated pH-metrically at 25°C and 0.1 M KCl ionic strength. The dissociation constants for H 2 L were obtained as 3.007, 7.620 and 9.564 and for H 2 L 1 , 4.000, 6.525, 9.473 and 10.423, respectively. The complexes were found to have the formulae [M(L) 2 ] for M = Co(II), Ni(II), Zn(II) and Cu(II). The stability of the complexes follows the sequence: Zn(II) < Co(II) < Cu(II) < Ni(II). The high stability of H 2 L 1 towards Cu(II) and Ni(II) over the other ions is remarkable, in particular over Cu(II), and may be of technological interest. Concentration distribution diagram of various species formed in solution was evaluated for ligands and complexes. The formation of the hydrogen bonds may cause this increased stability of ligands. The pH-metric data were used to find the stoichiometry, deprotonation and stability constants via the SUPERQUAD computer program.
Agrochimica, 2005
One of the most important sources of trace metals in agricultural soils is mineral fertilizer. A ... more One of the most important sources of trace metals in agricultural soils is mineral fertilizer. A large quantity of fertilizers containing trace metals has ben used under farming systems in Turkey and world since years. Inthis research, cadmium (Cd) lead (Pb), nickel (Ni), copper (Cu), zinc (Zn), iron (Fe), manganese (Mn) concentrations in sixteen solid fertilizer samples, which produced in different fertilizers factories in Turkey, were analysed and trace metals contamination risk was evaluated in Turkish soils. Phosphorus fertilizers contain trace metals at concentration above those found in all other fertilizers, and ammonium nitrates and urea fertilizers contained the lowest levels of trace metals. Trace metals concentrations, except Cd, in fertilizers were lower than the median soil trace metals values. Taking into consideration the calcareous and basic soil properties in Turkish soils, trace metal toxicity due to fertilizers use is not expected to be a major problem at present....
Journal of Food and Drug Analysis, 2020
Comparison of microwave, dry and wet digestion procedures for Comparison of microwave, dry and we... more Comparison of microwave, dry and wet digestion procedures for Comparison of microwave, dry and wet digestion procedures for the determination of trace metal contents in spice samples the determination of trace metal contents in spice samples
Bioorganic Chemistry, 2020
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Journal of Molecular Liquids, 2018
In this paper, five novel 1,4-naphthoquinone N-aroylthiourea derivatives were synthesized, by the... more In this paper, five novel 1,4-naphthoquinone N-aroylthiourea derivatives were synthesized, by the reaction of 2,3-diaminonaphthalene-1,4-dione and aroylisothiocyanates, in excellent yield (88-96%) and characterized by using FT-IR, 1 H/ 13 C NMR and HRMS. In addition, the molecular structure of one of the 1,4-naphthoquinone N-aroylthiourea compounds was characterized by single crystal X-ray diffraction studies. The absorption spectra of the compounds were determined in DMSO and the dyes have absorption in visible region in the range of 464-477 nm. The chemosensing ability of each of the prepared dyes was assessed by titrating them towards the anions; F
Journal of Molecular Structure, 2018
, crystal structure, DFT studies, acid dissociation constant, and antimicrobial activity of methy... more , crystal structure, DFT studies, acid dissociation constant, and antimicrobial activity of methyl 2-(4-chlorophenyl)-7a-((4-chlorophenyl) carbamothioyl)-1-oxo-5,5-diphenyl-3-thioxo-hexahydro-1H-pyrrolo[1,2-e]imidazole-6-carboxylate
Inorganica Chimica Acta, 2017
This is a PDF file of an unedited manuscript that has been accepted for publication. As a service... more This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Pt(II) and Ni(II) complexes of octahydropyrrolo[3,4-c]pyrrole N-benzoylthiourea derivatives: Synthesis, characterization, physical parameters and biological activity
Acta Chimica Slovenica, 2003
The deprotonation constants of 1-benzyl-4-piperazineglyoxime (BPGO) and 1-methyl-4piperazineglyox... more The deprotonation constants of 1-benzyl-4-piperazineglyoxime (BPGO) and 1-methyl-4piperazineglyoxime have been determined in 0.1 mol dm-3 NaCl at 25 °C potentiometrically (Molspin). The pK a values have been found as 9.79, 7.04 and 3.19 for BPGO and 9.56, 7.62 and 3.01 for MPGO in acidic medium. Protonation order of nitrogen atoms in the ligands has been determined by theoretical calculation (Semi-empirical AM1 method). In various pH conditions, the different complexes, which are formulated as MH
Http Dx Doi Org 10 1081 Al 120021095, Feb 2, 2007
Acta Chimica Slovenica, 2005
The dissociation constants of 1,2-bis(4-methylpiperazine)glyoxime (BMPGH2) and 1,2-bis(4-benzylpi... more The dissociation constants of 1,2-bis(4-methylpiperazine)glyoxime (BMPGH2) and 1,2-bis(4-benzylpiperazine)gly oxime (BBPGH2) were determined in 0.1 mol dm-3 NaCl and 0.001 mol dm-3 HCl at 25 °C potentiometrically. pK a values of BMPGH2 and BBPGH2 were obtained as 2.91
Trace Elements and Electrolytes, 2005