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    The Novel Triazine Cored Tripodal and Trinuclear Schiff Base-Oxime Metal Complexes: Their Magnetic Properties and Thermal Decompositions
    (WILEY, 2011) Uysal, Saban; Coskun, Ahmet
    2,4,6-tris(4-hydroxybenzimino)-1,3,5-triazine [ 1,2] (III) have been synthesized by the reaction of 1 equiv melamine and three equiv 4-hydroxybenzaldehyde, and characterized by means of elemental analysis, H-1-NMR (nuclear magnetic resonance spectroscopy), Fourier transform infrared (FTIR) spectrscopy, liquid chromatography-mass spectroscopy (LC-MS). L (IV) has been synthesized by the reaction of one equiv (III) and three equiv 4-(thiophenoxy) phenyloxylohydroxymoyl chloride (II), and characterized by means of the same methods. Then, four novel trinuclear Fe(III) and Cr(III) complexes involving tetradentate Schiff bases N,N'-bis(salicylidene)ethylenediamine-(salenH(2)) or bis(salicylidene)-o-phenylenediamine-(salophen H-2) with L (IV) have been synthesized and characterized by means of elemental analysis, FTIR spectrscopy, LC-MS, thermal analyses. The metal ratios of the prepared complexes have been determined using AAS. The aim of the present study is synthesis of novel tridirectional-trinuclear systems and to present their effects on magnetic behavior of [salenFe(III)], [salophenFe(III)], [salenCr(III)], and [salophenCr(III)] capped complexes. The complexes have also been characterized as low-spin distorted octahedral Fe(III) and Cr(III) bridged by keton-oxime group.
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    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 Erdem
    Chlorophenylglyoxime 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.
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    The synthesis and characterization of 2,4,6-tris(3,4-dihydroxybenzimino)-1,3,5-triazine and its [salen/salophenFe(III)] and [salen/salophenCr(III)] capped complexes
    (SPRINGER, 2009) Uysal, Saban; Ucan, H. Ismet
    Four new trinuclear Fe(III) and Cr(III) complexes involving tetradentate Schiff bases N,N'-bis(salicylidene)ethylenediamine-(salenH(2)) or bis(salicylidene)-o-phenylenediamine-(salophenH(2)) with 2,4,6-tris(3,4-dihydroxybenzimino)-1,3,5-triazine have been synthesized and characterized by means of elemental analysis, H-1 N.M.R., FT-IR spectroscopy, thermal analyses and magnetic susceptibility measurements. The complexes have also been characterized as low-spin distorted octahedral Fe(III) and Cr(III) bridged by catechol group.
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    Synthesis and characterization of a new dioxime and its heterotrinuclear BF(2)(+) capped complexes
    (TAYLOR & FRANCIS INC, 2008) Uysal, Saban; Coskun, Ahmet; Koc, Ziya Erdem; Ucan, H. Ismet
    omega-Isonitrosoacetophenone (1), phenylglyoxime (2), chlorophenylglyoxime (1), dopaminophenylglyoxime (3) and [(salen/saloph)Fe](2)O (4) have been synthesized as described in the literature procedure. [Fe(III)(salen/saloph)dopaminophenylglyoxime)] (starting complexes) have been synthesized from dopaminophenylglyoxime and tetradentate schiff bases which contain dinuclear Fe(III) oxygen-bridges N,N'-bis(salicylidene)ethylenediamine (salenH(2)) and bis(salicylidene)-o-phenylenediamine (salophH(2)). The new heterotrinuclear complexes have been obtained from starting complexes and Co(II), Ni(II), Cu(II) salts. Then, heterotrinuclear vic-dioxime complexes containing BF(2)(+) capped have been synthesized. The complexes have been characterized as low-spin distorted octahedral Fe(III) bridged by o-hydroxyphenolic groups. The o-hydroxyphenolic groups play a role as bridges for weak antiferromagnetic intramolecular exchange. The structure of dioxime and its complexes were identified by using elemental analysis, ICP-AES, (1)H-NMR and IR spectral data.
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    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 Erdem
    In 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.
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    The Synthesis and Characterization of Melamine Based and [Fe/CrSalen] or [Fe/CrSalophen] Capped Polimer Schiff Base Complexes
    (SPRINGER, 2010) Uysal, Saban; Ucan, H. Ismet
    In this study, by using previously reported monomer complexes [(2-(4-carboxybenzimino)-4,6-diamino-1,3,5-triazine)(salen/salophenFeIII)], [(2-(4-carboxybenzimino)-4,6-diamino-1,3,5-triazine)(salen/salophenCrIII)], [(2-(3,4-dihydroxybenzimino)-4,6-diamino-1,3,5-triazine)(salen/salophenFeIII)] and [(2-(3,4-dihydroxybenzimino)-4,6-diamino-1,3,5-triazine)(salen/salophenCrIII)] obtained by Uysal and U double dagger an (J Inc Phenom Macrocycl Chem, in press), sixteen new polimer Fe(III) and Cr(III) complexes involving tetradentate Schiff bases N,N'-bis (salicylidene)ethylenediamine-(salenH(2)) or bis(salicylidene)-o-phenylenediamine-(salophenH(2)) with 2-(4-carboxybenzimino)-4,6-diamino-1,3,5-triazine or 2-(3,4-dihydroxybenzimino)-4,6-diamino-1,3,5-triazine (Uysal and U double dagger an, J Inc Phenom Macrocycl Chem, in press) and terephthaldehyde or glutaraldehyde have been synthesized and characterized by means of elemental analysis, H-1 N.M.R., FT-IR spectrscopy, MS, thermal analyses and magnetic susceptibility measurements. The complexes have also been characterized as low-spin distorted octahedral Fe(III) and Cr(III) bridged by catechol and/or COO- groups.
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    The synthesis and characterization of melamine based Schiff bases and its trinuclear [salen/salophenFe(III)] and [salen/salophenCr(III)] capped complexes
    (SPRINGER, 2009) Uysal, Saban; Ucan, H. Ismet
    Four new trinuclear Fe(III) and Cr(III) complexes involving tetradentate Schiff bases N, N'-bis(salicylidene)ethylenediamine-(salenH(2)) or bis(salicylidene)-o-phenylenediamine-(salophen H-2) with 2,4,6-tris(4-carboxybenzimino)-1,3,5-triazine have been synthesized and characterized by means of elemental analysis, H-1 NMR, FT-IR spectroscopy, LC-MS, thermal analyses and magnetic susceptibility measurements. The complexes have also been characterized as low-spin distorted octahedral Fe(III) and Cr(III) bridged by COO- group.
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    SYNTHESIS AND CHARACTERIZATION OF S-TRIAZINE CORED TRIPODAL KETO-OXIME AND ITS TRINUCLEAR COMPLEXES
    (TAYLOR & FRANCIS INC, 2012) Uysal, Saban
    2,4,6-Tris(4-hydroxybenzimino)-1,3,5-triazine (II) has been synthesized by the reaction of 1 equiv. melamine (I) and 3 equiv. 4-hydroxybenzaldehyde and characterized by means of elemental analysis, H-1 NMR, Fourier transform-infrared spectroscopy, and liquid chromatography-mass spectrometry (LC-MS). 2,4,6-tris(4-(2-phenyl-2-keto-hydroxyiminoyloxy)benzimino)-1,3,5-triazine L (III) has been synthesized by the reaction of 1 equiv. II and 3 equiv. chloroisonitrozoacetophenone and characterized by means of the same methods. Four novel trinuclear Fe(III) and Cr(III) complexes involving tetradentate Schiff bases N,N'-bis(salicylidene) ethylenediamine-(salenH(2)) or bis(salicylidene)-o-phenylenediamine(salophen H-2) with L (III) have been synthesized and characterized by means of elemental analysis, Fourier transform-infrared spectroscopy, LC-MS (ESI+), and thermal analyses. The metal ratios of the prepared complexes have been determined using atomic absorption spectroscopy. The aim of the present study is to synthesize novel tridirectional-trinuclear systems and to present their effects on magnetic behavior of [salen or salophenFe(III)/Cr(III)] capped complexes. The complexes have also been characterized as low-spin distorted octahedral Fe(III) and as distorted octahedral Cr(III) bridged by keton-oxime group.
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    The synthesis and characterization of single substitute melamine cored Schiff bases and their [Fe(III) and Cr(III)] complexes
    (SPRINGER, 2010) Uysal, Saban; Ucan, H. Ismet
    In this study, firstly, two single substitute novel ligands have been synthesized by reacting melamine with 3,4,-dihydroxybenzaldeyhde or 4-carboxybenzaldehyde. Then, eight new mono nuclear single substitute [Salen/Salophen Fe(III) and Cr(III)] complexes have been synthesized by reacting the ligands [2-(3,4-dihydroxybenzimino)-4,6-diamimo-1,3,5-triazine and 2-(4-carboxybenzimino)-4,6-diamimo-1,3,5-triazine)] with tetradentate Schiff bases N,N'-bis(salicylidene)ethylenediamine-(salenH(2)) or bis(salicylidene)-o-phenylenediamine-(salophen H-2). And then, all ligands and complexes have been characterized by means of elementel analysis, FT-IR spectroscopy, H-1 NMR, LC-MS, thermal analyses and magnetic suscebtibility measurements. Finally, metal ratios of the prepared complexes were determined using AAS. The complexes have also been characterized as disorted octahedral low-spin Fe(III) and Cr(III) bridged by catechol and COO- groups.
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    The Synthesis and Characterization of Star Shaped Metal Complexes of Triazine Cored Schiff Bases: Their Thermal Decompositions and Magnetic Moment Values
    (SPRINGER, 2011) Uysal, Saban; Kursunlu, Ahmed Nuri
    Tripodal ligand III, 2,4,6-tris(4-hydroxybenzimino)-1,3,5-triazine, was synthesized by reacting melamine with 4-hydroxybenzaldehyde. (E)-4-Bromo-2-((2-bromoethylimino)-methyl)phenol VI was obtained by reaction of 5-bromo-2-hydroxybenzaldehyde and 2-bromoethanamine hydrochloride. Melamine cored tripodal Schiff base VII (H(3)L) was synthesized by reacting III with VI. Tripodal metal complexes were obtained by reacting H(3)L and transition metal salts. The complexes were characterized by elemental analyses, FT-IR, (1)H NMR and LC-MS spectroscopy, thermal analyses and magnetic measurements. Finally, metal ratios of the complexes were determined by atomic absorption spectroscopy. The complexes are square-planar low-spin (S = 1/2) Co(II), diamagnetic square-planar Ni(II), square-planar (S = 1/2) Cu(II) and diamagnetic tetrahedral Zn(II).
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    Synthesis and Characterization of Tripodal Oxy-Schiff base (2,4,6-Tris(4-Carboxymethylenephenylimino-4 '-formylphenoxy)-1,3,5-triazine) and the Thermal and Magnetic Properties of its Fe(III)/Cr(III) Complexes
    (SPRINGER, 2011) Koc, Ziya Erdem; Uysal, Saban
    Eight new trinuclear Fe(III)/Cr(III) complexes involving tetradentate (N2O2) and pentadentate (N3O2) Schiff bases of (salenH(2)), (salophenH(2)), (saldetaH(2)) and (salpyrH(2)) with 2,4,6-tris(4-carboxymethylenephenylimino-4'-formylphenoxy)-1,3,5-triazine were synthesized. The structure of ligand and complexes were identified using elemental and thermal analysis, magnetic susceptibility, and LC-MS, ICP-AES, H-1 NMR and FT-IR spectral data. All complexes are tripodal-trinuclear. The complexes are low-spin (S = 1/2) distorted octahedral salen- or salophen-capped Fe(III), high-spin (S = 5/2) distorted octahedral saldeta- or salpyr-capped Fe(III) and distorted octahedral (S = 3/2) salen-, salophen-, saldeta- or salpyr-capped Cr(III).
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    Synthesis of melamine based polymer complexes and their thermal degradations and magnetic properties
    (SPRINGER, 2013) Uysal, Saban
    In this study, new polymer Fe(III) and Cr(III) complexes were synthesized. These polymer complexes were characterized by using elemental analysis, FT-IR spectroscopy, MS, thermal analyses and magnetic susceptibility measurement technics. Their thermal degradations were investigated, and co-polymerization was compared to aliphatic polymerization by using 1,2-dibromomethylbenzene and o-phenylenedialdehyde. Finally, metal ratios of the complexes were determined by using atomic absorption spectroscopy. The complexes are distorted octahedral low-spin (S = 1/2) Fe(III) and distorted octahedral (S = 3/2) Cr(III) bridged by COO- and catechol groups.
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    SYNTHESIS OF STAR-SHAPED MACROMOLECULAR SCHIFF BASE COMPLEXES HAVING MELAMINE CORES AND THEIR MAGNETIC AND THERMAL BEHAVIORS
    (TAYLOR & FRANCIS INC, 2012) Uysal, Saban; Koc, Ziya Erdem; Celikbilek, Seyma; Ucan, H. Ismet
    We aim to study magnetic and thermal behaviors of some melamine cored macromolecular Schiff base complexes. In this context, tripodal ligands were synthesized by reacting melamine with 4-carboxybenzaldehyde or 4-hydroxybenzaldehyde. Then, 16 new trinuclear Fe(III), Cr(III), Mn(III), and Al(III) complexes were synthesized by reacting the ligands [ tris-(4-carboxybenzimino)-1,3,5-triazine) or tris-(4-hydroxybenzimino)-1,3, 5-triazine)] with pentadentate Schiff bases N,N'-bis(1-hydroxy-2-benzyliden)-1,7diamino-4-azaheptane or N,N'-bis(salicylidene) pyridine-2,6-diamine. Later, ligands and complexes were characterized by means of elemental analysis, infrared spectroscopy, H-1 NMR, liquid chromatography-mass spectrometry, thermal analyses, and magnetic susceptibility measurements. Finally, metal ratios of the prepared complexes were determined by using atomic adsorption spectrometry. The complexes were also characterized as distorted octahedral high-spin d(3) (S = 3 x 1/2) Cr(III), high-spin d(5) (S = 5 x 1/2) Fe(III), low-spin d(4) (S = 2 x 1/2) Mn(III), and diamagnetic Al(III) bridged by -OH group of COO- or OH group of phenol.