Yazar "Ucan, H. Ismet" seçeneğine göre listele

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    Complexes of Iron(III) and Chrom(III) Salen and Saloph Schiff Bases with Bridging 2,4,6-tris(4-nitrophenylimino-4'-formylphenoxy)-1,3,5-triazine
    (TAYLOR & FRANCIS INC, 2008) Koc, Ziya Erdem; Ucan, H. Ismet
    Four new trinuclear Fe(III) and Cr(III) complexes involving tetradenta Schiff bases N,N'-bis(salicylidene)ethylenediamine-(salenH2) or bis(salicylidene)-o-phenylenediamine-(saloph H2) with 2,4,6-tris(4-nitrophenylimino-4'-formylphenoxy)-1,3,5-triazine (TNPI-TRIPOD) have been synthesized and characterized by means of elemental analysis carrying out 1H-NMR., IR spectroscopy, thermal analyses and magnetic susceptibility measurements. The complexes can also be characterized as high-spin distorted octahedral Fe(III) and Cr(III) bridged by nitro. The nitro play a role as bridges for weak anti-ferromagnetic intramolecular exchange.
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    Complexes of iron(III) salen and saloph Schiff bases with bridging 2,4,6-tris(2,5dicarboxyphenylimino-4-formylphenoxy)-1,3,5-triazine and 2,4,6-tris(4-carboxyphenylimino-4'-formylphenoxy)-1,3,5-triazine
    (SPRINGER, 2007) Koc, Ziya Erdem; Ucan, H. Ismet
    Four new trinuclear Fe(III) complexes involving tetradenta Schiff bases N,N-1 -bis(salicylidene) ethylenediamine-(salenH(2)) or bis(salicylidene)-o-phenylenediamine-(salophH(2)) with 2,4,6-tris(2,5-dicarboxyphenylimino-4-formylphenoxy)-1,3,5-triazine (DCPI-TRIPOD) or 2,4,6-tris(4-carboxyphenylimino-4'-formylphenoxy)-1,3,5-triazine (CPI-TRIPOD) have been synthesized and characterized by means of elemental analysis carrying out H-1-n.m.r., i.r. spectroscopy, thermal analyses and magnetic susceptibility measurements. The complexes can also be characterized as high-spin distorted octahedral Fe-III bridged by carboxylic acids. The tricarboxylic acids play a role as bridges for weak antiferromagnetic intramolecular exchange.
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    Development of New Fluorescent Dyes by Using Amine Modified Nanoparticles for Immunostaining
    (TAYLOR & FRANCIS INC, 2016) Maltas, Esra; Ozmen, Mustafa; Ucan, H. Ismet
    Fluorescent labeling of DNA was studied by using two newly synthesized ligands, which are 4-(2-hydroxybenzylidinamino) benzoic acid (PHBA) and 4-(2-hydroxybenzylidinamino) phthalic acid (PHPA). Their binding capacity to calf-thymus DNA was determined on functionalized superparamagnetic iron oxide nanoparticles (SPIONs). 23.1 mu g of DNA was immobilized on 25mg of nanoparticles. Binding capacity of fluorescent ligands to DNA-APTS-SPIONs was also found as 2.36 mu M for PHBA and 1.97 for PHPA at 25mg of the nanoparticles. Binding of the DNA to the ligands were examined by scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, and confocal microscopy.
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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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    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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    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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    Synthesis of Crosslinked Chitosan Possessing Schiff Base and Its Use in Metal Removal
    (SPRINGER, 2012) Kocak, Nuriye; Sahin, Mustafa; Arslan, Gulsin; Ucan, H. Ismet
    A chitosan resin derivatized with Schiff bases was synthesized by using a crosslinked chitosan (CCTS) as base material. We first synthesized N-benzylidene chitosan (CTB) by the reaction of benzaldehyde with chitosan. After this reaction crosslinking was carried out in the usage of epichlorohydrine (ECH) as a crosslinking agent. The Schiff base was removed by reacting diluted ethyl alcohol hydrochloride solution to give crosslinked chitosan (CCTS). The CCTS was suspended in a mixture of ethyl alcohol/deionized water followed by the addition of epichlorohydrine and by this way crosslinked chitosan-epichlorhydrine (CCTS-ECH) resin was synthesized. After the reaction was completed, the product was filtered, washed with ethyl alcohol and deionized water and dried in vacuum. The two novel polymeric ligands (CCTS-ECH-DHSalophen and CCTS-ECH-DHDPE) were synthesized by the reaction of CCTS-ECH with N,N'-bis(2,5 dihydroxybenzylidene)-1,2-diaminobenzene (DHSalophen), and N,N'-bis(2,5 dihydroxybenzylidene)-4,4'-diaminodiphenylether (DHDPE). The structures of the ligands were characterized by elemental analysis, infrared spectroscopy(FT-IR), scanning electron microscopy(SEM) and thermogravimetric analysis (TGA/DTA). Adsorption experiments (pH dependency, kinetics, and equilibrium) of compounds toward Cr(VI) from waste water were carried out at 25 degrees C.
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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.