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Öğe Excess Molar Volumes, Apparent Molar Volumes, Partial Molar Volumes of Methionine, An Amino Acid, in Water(Int Center Applied Thermodynamics, 2022) Vural, Ufuk Sancar; Uysal, SabanMethionine is an amino acid that is extremely important for human health. To better understand the biochemical events occurring in the human body, the excess molar properties of methionine and aqueous ethanol and aqueous methanol mixtures were determined at 298.15 K. Interactions between components in solutions are explained. Negative deviations from the ideal state have been observed in methionine solutions due to hydrogen bonds, dipole interactions, charge-transfer interactions.Öğe The improved diesel-like fuel from upgraded tire pyrolytic oil(Serbian Chemical Soc, 2022) Vural, Ufuk Sancar; Uysal, Saban; Yinanc, AbdullahTire pyrolytic oil (TPO) obtained from thermal pyrolysis of scrap tires is not a diesel equivalent fuel which can be used directly in vehicles due to its high density, viscosity, sulfur content, low flash point and low cetane index. It can only be used in a limited way by mixing with diesel fuel (DF) in amounts less than 30 %. In this study, the pyrolysis of scrap tires was carried out at a heating rates of 5 and 10 ??C min-1 in the range of 450???600 ??C, using a mixture of hierarchical zeolite (HZSM-5), mesoporous silica (MCM-41) and quicklime (CaO) as the catalyst. The obtained TPO and catalytic pyrolytic oil (CPO) were upgraded by pre-treatment, and distillation consisting of a mixture of Cu(I)-loadedmesoporous aluminosilicate (Cu(I)???MAS) and MCM-41, desulfurization and decolourization steps, respectively. To obtain diesel-like fuel, the upgraded catalytic pyrolytic oil (UCPO) and biodiesel (PBD) obtained from palm oil were blended in certain proportions. Density, viscosity, flash point and cetane index of the obtained diesel-like fuels were found within the limit values of diesel fuel.Öğe Investigation of [MSalen/salophen] (M = Cr3+, Fe3+ or Co3+) capped dinuclear complexes of two novel tetraoxocalix[2](m-hydroxymethyl)arene[2]triazine compounds(Taylor & Francis Inc, 2021) Aouled, Idriss Mahamoud; Uysal, SabanIn this work, (3,5-bis((4,6-dichloro-1,3,5-triazine-2-yl)oxy)phenyl)methanol was obtained by reacting cyanuric chloride with 3,5-dihydroxybenzyl alcohol at 0 degrees C. Then, s-triazine bridged calixarene codded as L1 was obtained by reacting the compounds with 3,5-dihydroxybenzyl alcohol. Targed ligands, which we code as L2 and L3, were obtained from the reaction of the L1 coded compound with 4-aminobenzoic acid or 4-hydroxybenzoic acid, respectively. [MSalen/Saloph] capped s-triazine bridged calixarene complexes were obtained from the reaction of the L2 or L3 codded ligand and the [(MSalen/Saloph)(2)O] (M = Cr3+, Fe3+, Co3+) starting complexes in 1,4-dioxane media. The ligands and complexes were characterized by using H-1-NMR, FT-IR spectroscopy, UV-Vis spectroscopies, magnetic susceptibility, TGA-DTA and elemental analysis techniques. Metal contents of the complexes were determined by using ICP-AES spectroscopy. Calixarenes can be used in many areas such as chiral phase transfer catalyst, recognition of enantiomers, stationary phase in chromatography, recovery of heavy and precious metals molecules or ions from environmental wastes.Öğe Investigation of thermal and magnetic properties of [MSalen/Saloph] (M = Cr3+, Fe3+ or Co3+) capped dinuclear complexes of two novel tetraoxocalix[2]arene[2]triazine ligands(Elsevier, 2023) Aouled, Idriss Mahamoud; Uysal, SabanIn this study, tetraoxocalix[2]arene[2]triazine compound as starting compound codded as C1 was synthesized by reacting of 2,4,6-trichloro-1,3,5-triazine with methyl-3,5-dihydroxybenzoate in two stages. sTriazine bridged calixarene ligands as target ligands, which we coded as C2 and C3, were obtained from the reaction of C1 coded compound with 4-aminobenzoic acid or 4-hydroxybenzoic acid at 1:2 mole ratio, respectively. [MSalen/Saloph] capped benzoic acid substitute tetraoksocalix[2] aren[2]triazine complexes were obtained from the reaction of C2 or C3 codded ligand with [(MSalen/Saloph) 2 O] (M = Cr 3 + , Fe 3 + and Co 3 + ) starting complexes in 1,4-dioxane media. The ligands obtained were characterized by using 1 HNMR , FT-IR spectroscopy and elemental analysis techniques. The complexes obtained were characterized by using FT-IR, UV-vis spectroscopies, elemental analysis, magnetic susceptibility, and TGA-DTA techniques. Metal contents of the complexes were determined by using ICP-OES spectroscopy. (c) 2023 Elsevier B.V. All rights reserved.Öğe The synthesis and characterization of (MSalen/salophen/saldeta/salpy) [M=Fe(III) or Cr(III)] capped heteromultinuclear schiff bases-dioxime Ni(II) complexes: Their thermal and magnetic behaviours(Elsevier Science Bv, 2018) Uysal, Saban; Koc, Ziya ErdemChlorophenylglyoxime and Ligand Complexes ([M(Salen/Salophen)](2)O, [M(Saldeta/Salpy)Cl] shortened as LC, M = Fe(III) or Cr(III)) have been synthesized. 3,5-dicarboxyanilinophenylglyoxime (5) and 4-carboxyphenylhydrazinophenylglyoxime (6) have been synthesized with the reaction of chlorophenylglyoxime and 5-aminoisophtalalic acid or 4-hydrazinobenzoic acid. [M(Salen/Salophen/Saldeta/ Salpy)-3,5-dicarboxyanilinophenyl-glyoxime)] (7-14) or [M(Salen/Salophen)-4-carboxyphenylhydrazinophenylglyoxime)] (15-22) have been synthesized from (5) or (6) and LCs. The new heterotrinuclear and pentanuclear complexes (23-38) have been obtained from (7-22) and Ni(II) salt. Then, heteronuclear and BF2+ capped vic-dioxime complexes (39-54) have been synthesized. The complexes have been characterized as low-spin (S=1/2) distorted octahedral [Fe-III(Salen/Salophen)], high-spin (S = 5/2) distorted octahedral [Fe-III(Saldeta/Salpy)] and (S = 3/2) distorted octahedral [Cr-III(Salen/Salophen/Saldeta/Salpy)] bridged by COO- groups. The structure of all ligand and complexes were identified by using elemental analysis, thermal analyses, magnetic susceptibility, LC-MS, ICP-AES, H-1-NMR and FT-IR spectral data. (C) 2018 Elsevier B.V. All rights reserved.Öğe The synthesis and characterization of [M(salen/salophen/saldeta)] [M=Cr(III), Mn(III) or Fe(III)] capped s-triazine cored tripodal trinuclear Schiff bases complexes(Springer, 2018) Isci, Berkman; Uysal, SabanLigand complexes ([M(salen/salophen)](2)O, [M(saldeta)]Cl shortened as LC, M=Cr(III), Mn(III) or Fe(III)), have been synthesized. 2,4,6-tris(4-formylphenoxy)-1,3,5-triazine (3) was synthesized with the reaction of p-hydroxybenzaldehyde (2) and cyanuric chloride (1). 2,4,6-tris(4-(4-carboxyphenylimino)phenoxy)-1,3,5-triazine (5) was synthesized with the reaction of 2,4,6-tris(4-formylphenoxy)-1,3,5-triazine (3) and 4-aminobenzoic acid (4). 2,4,6-tris(4-(4-carboxyphenylimino)phenoxy)-1,3,5-triazine was treated with SOCl2 in CH3CN, and 2,4,6-tris(4-(4-chloroformylphenylimino)phenoxy)-1,3,5-triazine (6) was obtained. 2,4,6-tris(4-(4-chloroformylphenylimino)phenoxy)-1,3,5-triazine was reacted with 4-aminobenzoic acid or 4-hydroxbenzoic acid in CH3CN, and 2,4,6-tris(4-(4-(4-carboxyphenylamido)phenylimino)phenoxy)-1,3,5-triazine (8) and 2,4,6-tris(4-(4-(4-carboxyphenylformato)phenylimino)phenoxy)-1,3,5-triazine (9) were obtained. s-Triazine cored tripodal trinuclear Schiff bases complexes were synthesized with the reaction of 8 and/or 9 and ligand complexes. The complexes have been characterized as low-spin (S=1/2) distorted octahedral Fe(III)Salen/Salophen, low-spin (S=1) distorted octahedral Mn(III)Salen/Salophen, high-spin (S=5/2) distorted octahedral Fe(III)Saldeta, high-spin (S=2) distorted octahedral Mn(III)Saldeta and (S=3/2) distorted octahedral Cr(III)Salen/Salophen/Saldeta bridged by COO- groups. The structure of all ligand and complexes were identified by using elemental analysis, thermal analyses (TGA-DTG), magnetic susceptibility, ESI-MS, ICP-AES, UV-Vis, H-1-NMR, C-13-NMR and FT-IR spectral data. [GRAPHICS] .Öğe Synthesis and Characterization of Cross Linked Acetoguanamine Polymer Complexes: Investigation of their Thermal and Magnetic Properties(Slovensko Kemijsko Drustvo, 2020) Guney, Gurkan; Uysal, Saban; Koc, Ziya ErdemIn this study, 2,4-diamino-6-methyl-1,3,5-triazine (acetoguanamine) was used as the starting material. 2,4-diamino-6-methyl-1,3,5-triazine was boiled under reflux with glutaraldehyde and terephthaldehyde in acetonitrile. And, s-triazine-containing polymer ligands (IV and V) were obtained by these condensation reactions. These target s-triazin containing polymer ligands we obtained were analyzed by H-1-NMR, FT-IR and elemental analysis. Then, polymeric metal (Co2+, Ni2+ and Cu2+) complexes of the polymeric ligands (VI-XI) were obtained from the interaction with CoCl2 center dot 6H(2)O, NiCl2 center dot 6H(2)O and CuCl2 center dot 2H(2)O at 60 degrees C in ethyl alcohol. The structures of these complexes were also illuminated and elucidated using FT-IR, elemental analysis and magnetic susceptibility analysis. The polymerization degrees of the polymeric ligands were determined by the molecular weight determination study with the viscometer.Öğe Synthesis and characterization of dopamine substitue tripodal trinuclear [(salen/salophen/salpropen)M] (M=Cr(III), Mn(III), Fe(III) ions) capped s-triazine complexes: Investigation of their thermal and magnetic properties(Elsevier Science Bv, 2016) Uysal, Saban; Koc, Ziya ErdemIn this work, we aimed to synthesize and characterize a novel tridirectional ligand including three catechol groups and its novel tridirectional-trinuclear triazine core complexes. For this purpose, we used melamine (2,4,6-triamino-1,3,5-triazine) (MA) as starting material. 2,4,6-tris(4-carboxybenzimino)-1,3,5-triazine (II) was synthesized by the reaction of an equivalent melamine (I) and three equivalent 4-carboxybenzaldehyde. 4,4',4 ''-((1E,1'E,1 '' E)-((1,3,5-triazine-2,4,6-triyl)tris(azanylylidene))tris(methanylylidene))tris(N-(3,4-dihydroxyphenethyl)benzamide) L (IV) was synthesized by the reaction of one equivalent (II) and three equivalent dopamine (3,4-dihydroxyphenethylamine) (DA) by using two different methods. (II, III, IV) and nine novel trinuclear Cr(III), Mn(III) and Fe(III) complexes of (IV) were characterized by means of elemental analyses, H-1 NMR, FT-IR spectrometry, LC-MS (ESI+) and thermal analyses. The metal ratios of the prepared complexes were performed using Atomic Absorption Spectrophotometry (AAS). We also synthesized novel tridirectional-trinuclear systems and investigated their effects on magnetic behaviors of [salen, salophen, salpropen Cr(III)/Mn(III)/Fe(III)] capped complexes. The complexes were determined to be low-spin distorted octahedral Mn(III) and Fe(III), and distorted octahedral Cr(III) all bridged by catechol group. (C) 2015 Elsevier B.V. All rights reserved.Öğe Synthesis and Characterization of Oxime Derivatives and their Some Transition Metal Complexes with Thiadiazole Groups: Biological Activities, and Molecular Docking Studies of the Ligands(Wiley-V C H Verlag Gmbh, 2024) Otaiwi, Ahmed Saleem; Mirghani, Ahmed Hamdi; Bostanci, Hayrani Eren; Coskun, Ahmet; Tahtaci, Hakan; Uysal, SabanThis study involved the synthesis and investigation of the anticancer and antioxidant capabilities of six newly developed ligands generated from 1,3,4-thiadiazole and diphenyl ether keto oxime which has never been synthesized before, together with their transition metal complexes. The obtained ligands were characterized using elemental analysis, FTIR, 1H NMR, 13C NMR, and mass spectroscopy. Polymeric complexes of the obtained ligands were synthesized by reacting all ligands with MCl2.nH2O (M: Mn2+/Co2+)/Ni2+/Cu2+)) salts. The polymeric complexes ' structures were determined using elemental analysis, ICP-AES, FTIR spectroscopy, UV-vis spectroscopy, magnetic susceptibility analysis, and thermogravimetric analysis. Subsequently, the ligands were examined for their anticancer properties. To achieve this objective, the HT-22 cell line, which consists of healthy mouse hippocampus neuronal cells, is utilized as the control group. Additionally, the MCF7 (breast cancer), MDA-MB-231 (breast cancer), C6 (rat glioma), HT-29 (colon cancer), and A549 (lung carcinoma) cell lines are employed in cell culture research as representatives of cancerous cell lines. Based on the cell culture investigations, some of the synthesized ligands showed moderate to good anti-cancer activity, especially for both colon cancer and brain tumors. Finally, a molecular docking analysis was conducted utilizing MOE software to ascertain the binding affinity between the synthesized ligands and the specific proteins of interest. This study includes the synthesis of transition metal complexes of six new ligands obtained from 1,3,4-thiadiazole and diphenyl ether keto oxime and the investigation of the anticancer and antioxidant properties of the ligands. Finally, a molecular docking analysis was performed to determine the binding affinity between the synthesized ligands and specific proteins of interest. imageÖğe The synthesis and characterization of pyridine cored dentrimeric s-Triazine Schiff bases: Investigation of their [MSalen/Salophen] (M = Cr3+, Fe3+, Co3+ and Zr4+) capped complexes(Elsevier, 2023) Kiymaz, Kubra; Uysal, SabanIn this study, 2,6-bis(4,6-dichloro-1,3,5-triazine-2-yl-amino)pyridine (III) was obtained by reacting cyanuric chloride with 2,6-diaminopyridine at 0 ?. Then, 2,6-bis(4,6-(4-formyphenoxy)-1,3,5-triazine-2-yl-amino)pyridine (IV) was obtained by reacting the compounds with 4-hydroxybenzaldehyde. The first tar-get ligand 2,6-bis(4,6-(4-(4-carboxybenzylimino) phenoxy)-1,3,5-triazine-2-yl amino) pyridine (V) and second target ligand 2,6-bis(4,6-(4-(3,5-dicarboxybenzylimino)phenoxy)-1,3,5-triazine-2-yl-amino) pyridine (VI) were obtained by reacting compound IV with 4-aminobenzoic acid or 5-aminoisophtalic acid, respectively. [MSalen/Saloph] capped complexes were obtained from the reaction of V and VI codded ligands and the [(MSalen/Saloph)(2)O] (M = Cr3+, Fe3+, Co3+ and Zr4+) starting complexes in 1,4-dioxane or DMF media, respectively. The ligands were characterized by using 1H-NMR, FT-IR spectroscopy, ESI-MS and elemental analysis techniques. The complexes were characterized by using FT-IR, MALDI-TOF spectrometer, UV-Vis spectroscopies, elemental analysis, magnetic susceptibility, and TGA-DTA techniques. Metal contents of the complexes were determined by using ICP-AES spectroscopy. (C) 2022 Elsevier B.V. All rights reserved.Öğe The synthesis and characterization of s-triazine bridged calixarene based a Schiff base: Investigation of its [MSalen/Salophen] (M = Cr3+, Fe3+ or Co3+) capped complexes(Elsevier, 2022) Aouled, Idriss Mahamoud; Uysal, SabanIn this study, 2,4-bis((4,6-dichloro-1,3,5-triazin-2-yl)oxy)benzaldehyde, was obtained by reacting cyanuric chloride with 2,4-dihydroxybenzaldehyde at 0 degrees C. Then, s-triazine bridged calixarene codded as TABCA1 was obtained by reacting the compounds with 2,4-dihydroxybenzaldehide. This s-triazine bridged calixarene ligand, which we coded as TABCA2, was obtained from the reaction of TABCA1 coded compound with 4-aminobenzoic acid at a 1:2 mole ratio, twice. [MSalen/Saloph] capped s-triazine bridged calixaren complexes were obtained from the reaction of TABCA2 codded ligand and the [(MSalen/Saloph)(2)O] (M=Cr3+, Fe3+ and Co3+) starting complexes in 1,4-dioxane media. The ligand obtained were characterized by using H-1 NMR, FT-IR spectroscopy and elemental analysis techniques. The complexes obtained were characterized by using FT-IR, UV-Vis spectroscopies, elemental analysis, magnetic susceptibility, and TGA-DTA techniques. Metal contents of the complexes were determined by using ICP-AES spectroscopy. (C) 2021 Elsevier B.V. All rights reserved.Öğe The synthesis and characterization of s-Triazine polymer complexes containing epoxy groups(Elsevier, 2020) Karakaya, Neslihan Orhan; Uysal, SabanIt has been synthesized in this study that s-triazine based monomeric complexes including epoxy groups and their polymeric structures. For this reason, cyanuric chloride (I) has been used as starting material. 5-(4,6-dicholoro-2-1,3,5-triazine-2-ylamino)isophtalic acid coded as III has been obtained from the reaction of 5-aminoisophtalic acid II and I at -5 degrees C with sodium bicarbonate in aqua/acetone media. Bis(oxiran-2-ylmethyl)-5-(4,6-dichloro-1,3,5-triazine-2-ylamino)izophtalate coded as V was synthesized from the reaction of epichlorohydrin (IV) and III in aqua/acetone media with KOH at 2 degrees C. In aqua/ ethanol media at 60 degrees C, monomeric metal complexes (VI, VII and VIII) were obtained from the reaction of V and/or Mn+2, Co+2 and Ni+2. s-Triazine based polymeric metal complexes (IX-XIV) were obtained from the reaction of the monomeric metal complexes and 3,4-dihydroxybenzaldehyde/o-phenylenediamine in 1,4-diaxane media with DIPEA at 60 degrees C. The structure of ligands, monomers and polymers were characterized using H-1 NMR and C-13 NMR, FTIR, ESI-MS, UV-vis spectrophotometers, TGA and elemental analyses. Metal contents in the prepared monomeric and polymeric complexes were determined by inductively coupled plasma atomic emission spectrophotometer (ICP-AES). Magnetic behaviors of the synthesized novel monomeric and polymeric complexes were also investigated. And, these compounds were determined to be high-spin distorted octahedral Mn(II), distorted octahedral Co(II) and distorted octahedral Ni(II). (C) 2019 Elsevier B.V. All rights reserved.Öğe Synthesis and characterization of schiff bases and their Ag(I) complexes containing 2,5,6-trisubstituted imidazothiadiazole derivatives: molecular docking and in vitro cytotoxic effects against nonsmall lung cancer cell line(John Wiley & Sons, 2025-01-20) Mirghani, Ahmed Hamdi; Pehlivanoglu, Suray; Alici, Hakan; Tahtaci, Hakan; Uysal, SabanIn this study, four novels 2,5,6-trisubstituted imidazothiadiazole derivative ligands and their Ag(I) complexes were synthesized and characterized using various spectroscopic analysis techniques. First, imidazo[2,1-b][1,3,4]thiadiazole derivative (3) was obtained from the reaction of 5-amino-1,3,4-thiadiazole-2-thiol with benzyl bromide in the presence of KOH in an ethanolic medium. In the next step, the resultant compound reacted sequentially with four substituted phenacyl bromide derivatives (4a–4d) under refluxed ethanol for 24 h to obtain substituted 2-(benzylthio)-6-phenylimidazo[2,1-b][1,3,4]thiadiazole derivatives (5–8). Compounds (9–12) were obtained by attaching a carbonyl group to carbon number 5 of the imidazothiadiazole group in these compounds with the help of Vilsmeier–Haack reagent. The resultant compounds were reacted in an ethanolic medium to synthesize the novel (13–16) ligands by adding ethylenediamine in a 1:2 molar ratio. The Ag(I) complexes of the resultant ligands were synthesized by mixing silver acetate with the ligands in a dimethyl sulfoxide medium to obtain (17–20) complexes. All the synthesized compounds were analyzed using FTIR, 1H NMR, 13C NMR, mass spectroscopy, magnetic susceptibility, ICP-OES, and thermogravimetric analysis techniques. The study also investigates the in vitro cytotoxic effect of the ligands and complexes on A549 (nonsmall cell lung cancer) cells using the MTT assay and shows that the 13, 15, and 16 ligands, together with their complexes, exhibit potent cytotoxicity. In addition, in silico molecular docking simulations were conducted both to support the in vitro cytotoxicity experiments and to ascertain the active binding sites and interactions of the ligands and complexes on the EGFR receptor. The result indicates that ligands and complexes may serve as promising candidates for further investigation as anticancer agents.Öğe Synthesis and characterization of tetra-armed-thiosemicarbazone and its salen/salophen capped transition metal complexes: Investigation of their thermal and magnetic properties(Taylor & Francis Inc, 2016) Uysal, Saban; Er, Mustafa; Tahtaci, HakanIn this work, we aimed to synthesize and characterize a novel tetra-directional ligand, (2E,2E)-2,2-((((2-(1,3-bis(4-((E)-(2-carbamothioylhydrazono)methyl)phenoxy)propan-2-ylidene)propane-1,3-diyl)bis(oxy))bis(4,1-phenylene))bis(methanylylidene))bis(hydrazinecarbothioamide) (5), including thiosemicarbazone group and its novel tetra-directional-tetra-nuclear Schiff base complexes. For this purpose, we used 1,4-dibromo-2,3-bis(bromomethyl)but-2-ene (2) as starting material. 4,4-((2-(1,3-Bis(4-formylphenoxy)propan-2-ylidene)propane-1,3-diyl) bis(oxy))dibenzaldehyde (3) was synthesized by the reaction of an equivalent 1,4-dibromo-2,3-bis(bromomethyl)but-2-ene (2) and 4 equivalents of 4-hydroxybenzaldehyde. Then, compound 5 was synthesized in high yield (86%) by a condensation reaction of compound 3 with thiosemicarbazide (4). Finally, four novel tetra-nuclear Cr(III) or Fe(III) complexes of compound 5 were synthesized. The synthesized compounds were characterized using elemental analyses, H-1 NMR, Fourier transform-infrared spectrometry, liquid chromatography-mass spectrometry (ESI+), and thermal analyses. The metal ratios of the prepared complexes were determined using an atomic absorption spectrophotometer. We also investigated their effects on the magnetic behaviors of [salen, salophen, Cr(III)/Fe(III)] capped complexes. The complexes were found to be low-spin distorted octahedral Fe(III) and distorted octahedral Cr(III), all bridged by thiosemicarbazone. [GRAPHICS]Öğe Synthesis and characterization of the Co(II) and Ni(II) complexes of 1,3,4-thiadiazole-derived ketones and secondary alcohols: thermal and magnetic properties(Taylor & Francis Ltd, 2021) Erdogan, Melih; Kiymaz, Kubra; Tahtaci, Hakan; Uysal, SabanCompounds containing both ketone and amide carbonyl groups were reduced with sodium borohydride (NaBH4). In this way, secondary alcohols, which are very important compounds for the synthesis of drugs, agricultural chemicals, food chemicals, and other chemicals, were obtained with regioselectivity. To do this, the starting compound 2-(5-amino-1,3,4-thiadiazol-2-yl)thio)-1-(3,4-dichlorophenyl)ethanone (3) was obtained. Subsequently, 10 ketone derivatives (5a-j) were synthesized from the reaction of 3 with the appropriate substituted acyl halide derivatives (4a-j). Then, secondary alcohol derivatives (6a-j), which came from the regioselective reduction of the ketone derivatives (5a-j), were synthesized with NaBH4. The molecular structures of ketone and alcohol derivatives were elucidated using H-1 NMR, C-13 NMR, FTIR, and MS. In the last step of the study, binuclear metal complexes of all alcohol and ketone derivatives were synthesized in DMF and characterized using FTIR and MS. The magnetic properties and thermal stability of these complexes were investigated using magnetic susceptibilities and determined using a Gouy magnetic susceptibility apparatus and a TGA analyzer, respectively. The complexes are distorted octahedral low-spin (S = 3/2) Co(II) and distorted octahedral (S = 1) Ni(II). Finally, the metal ratios of the complexes were determined by using ICP-AES.Öğe Synthesis and Characterizations of s-Triazine Polymeric Complexes Including Epoxy Groups: Investigation of Their Magnetic and Thermal Properties(Springer, 2019) Tekin, Oguzhan; Uysal, SabanWe aimed to synthesize and characterize novel salen/salophen capped polymeric complexes including oxirane groups. For this purpose, we used 2,4,6-trichloro-1,3,5-triazine (I) as starting material. 2,4-dichloro,6-(3,4-dihydroxyphenylethylamino)-1,3,5-triazine (II) was synthesized by the reaction of an equivalent (I) and an equivalent dopamine. 2-(3,4-bis(oxiran-2-ylmethoxy)phenethyl)amine,4,6-dichloro-1,3,5-triazin (III) was synthesized by the reaction of two equivalents of epichlorohydrin and an equivalent of (II). [(Salen/Salophen) (Cr(III)/Fe(III))] capped complexes of (III) were synthesized by reaction of the reactants, codded as IV, V, VI and VII. Then, these monomeric complexes were polymerized by using ethylenediamine and o-phenylenediamine in 1,4-dioxane media, codded as VIII, IX, X, XI, XII, XIII, XIV and XV. II and III, monomeric and polymeric complexes were characterized by means of elemental analyses, H-1-NMR (spectrometry) and C-13-NMR (spectrometry), FT-IR spectrometry, ESI-MS and thermal analyses. Metal content in the prepared polymeric complexes was determined by inductively coupled plasma atomic emission spectrophotometer (ICPAES). We also synthesized novel polymeric complexes and investigated their effects on magnetic behaviors of [Cr(III)/Fe(III)(salen/salophen)] capped complexes. The complexes were determined to be low-spin distorted octahedral Fe(III) and distorted octahedral Cr(III).Öğe Synthesis of bilaterally thiadiazole substituted vic-dioxime ligands and investigation of their polymeric metal complexes(Elsevier, 2024) Khalid, Omar; Salah, Mojahid; Mirghani, Ahmed Hamdi; Tahtaci, Hakan; Coskun, Ahmet; Uysal, SabanIn this study, three novels substituted 1,3,4-thiadiazole-derived vic-dioxime ligands and their corresponding polymeric transition metal (Co2+and Ni2+) complexes were synthesized and their structural characterizations were performed. For this purpose, 4,4 '-bis(chloroacetyldiphenyl) ether (OKS1) was obtained from the reaction of diphenyl ether with chloroacetyl chloride at a 1:2 molar ratio with the help of the Friedel-Crafts reaction. Our first starting oxime compound 2,2 '-(oxybis(4,1-phenylene))bis(N-hydroxy-2-oxoacetimidoyl) chloride (OKS2) was obtained from the reaction of OKS1 with butyl nitrite at a 1:2 molar ratio under the catalysis of HCl gas. Then, our final starting vic-dioxime compound 2,2 '-(oxybis(4,1-phenylene))bis(N-hydroxy-2-(hydroxyimino) acetimidoyl) chloride (OKS3) was obtained from the reaction of OKS2 with hydroxylamine hydrochloride in ethanol media at 40 degrees C. Then, our three original target vic-dioxime compounds (OKL1-OKL3) were synthesized from the reaction of substituted 2-amino-1,3,4-thiadiazole compounds with OKS3. Structural characterizations of all synthesized organic compounds were made using elemental analysis, FTIR, 1H and 13C NMR and mass spectroscopy methods. Target complexes were obtained from the reaction of all ligands with MCl2.nH2O (M: Co2+and Ni2+) salts, and their structures were elucidated using FTIR, magnetic susceptibility, thermogravimetric analysis, elemental analysis, and ICP-OES spectroscopy methods.
