Yildiray Topcu

Ondokuz Mayıs Üniversitesi · Department of Chemical Engineering

In the presented study, the structural, thermal, and mechanical properties of the nanocomposites were investigated by doping silanized hexagonal boron carbide (h‐B4C) nanoparticles in varying proportions (0.5%, 1%, 2%, 3%, 4%, and 5%) into the epoxy resin by weight. For this purpose, the surfaces of h‐B4C nanoparticles were silanized by using 3‐(gl...

A novel pyridazin-3(2H)-one derivative, (E)-6-(4-methylstyryl)-4,5-dihydropyridazin-3(2H)-one (3) has been synthesized and characterized by FT-IR, UV-vis, ¹H- and ¹³C-NMR, TGA/DTA thermal analysis and single-crystal X-ray diffraction. Furthermore, the molecular geometry, vibrational frequencies, electronic absorption spectra, chemical shift values,...

The 2D coordination polymer of Cu(II), [Cu(5-aip) (3-pic)2]n (5-aip = 5-aminoisophthalato, 3-pic = 3-picoline) was characterized by elemental analysis, FT-IR and UV–Vis spectroscopy and single crystal XRD techniques. The X-ray single crystal data revealed that the polymeric coordination complex crystallizes in the monoclinic system with P21/n space...

In this study, the Response Surface Methodology (RSM) based on Central Composite Design (CCD) was used to determine the optimization of bio-char production from chicken manure wastes. The effects of temperature, heating rate and reaction time on pyrolysis of chicken manure waste were investigated in the fluidized bed reactor. Operation conditions w...

The identification of biomasses for pyrolytic conversion to biofuels depends on many factors, including: moisture content, elemental and volatile matter composition, thermo-kinetic parameters, and evolved gases. The present work illustrates how canola residue may be a suitable biofuel feedstock for low-temperature (< 450 °C) slow pyrolysis with ene...

In the title compound, [Ni(C 10 H 24 N 2 O 4 )(C 4 H 4 O 4 )]·4H 2 O, the Ni II cation is octahedrally coordinated by one O atom of the succinate anion and three O atoms and two N atoms from an N , N , N ′, N ′-tetrakis(2-hydroxyethyl)ethylenediamine molecule. In the crystal, molecules are linked by O—H...O and C—H...O hydrogen bonds, forming a thr...

In this study, the optical parameters such as absorption coefficient, optical band gap, refractive index and angles of incident and refraction of the Hg(II) complex with 5d 10-configuration of the same ligand for dimethylsulfoxide (DMSO) and ethanol (EtOH) were examined. The effects on the optical properties of the Hg(II) complex of the solvents ha...

An economically viable transition to a renewable, sustainable energy future hinges on the ability to simultaneously produce multiple high value products from biomass precursors. Though there is considerable literature on the thermochemical conversion of biomass to biofuels and biochars, there are few holistic examinations that seek to understand tr...

We investigated the optical properties and the transmittance characterizations of the stock solutions of the Co (II) and Ni(II) complexes of Saccharin and determined the molar extinction coefficients at different molarity. The molar extinction coefficients (ε) values of the Co (II) and Ni(II) complexes in the first region decrease with increasing m...

As a result of involvement of all carboxylato/methoxo/oxo donor oxygen atoms of a phytochemical ferulic acid with zinc ions, a Zn-ferulate metal–organic framework (PhytoMOF-1), {[Zn2(fer)2]}n is formed. The structure of PhytoMOF-1 was characterized by single crystal X-ray diffraction studies. PhytoMOF-1 contains channels with a considerable diamete...

The pyrolysis characteristics and kinetics of Polysiphonia elongata were investigated using a thermogravimetric analyzer. The main decomposition of samples occurred between 225°C and 485°C at heating rates of 5-40°C/min; owing to release of 78-82% of total volatiles. The heating rate effected pyrolysis characteristics such as maximum devolatilizati...

The experimental and theoretical investigation results of a novel organic squarate salt of 4-Morpholinium bis(hydrogen squarate) (1), C6H14ON(+)·C8H3O8(-), were reported in this study. The crystal structure of the title compound was found to crystallize in the triclinic P-1 space group. In the crystals of 1 the morpholine ring adopts the chair conf...

This study aims at investigating physicochemical properties and pyrolysis kinetics of hazelnut husk, an abundant agricultural waste in Turkey. The physicochemical properties were determined by bomb calorimeter, elemental analysis and FT-IR spectroscopy. Physicochemical analysis results showed that hazelnut husk has a high calorimetric value and hig...

A new two-dimensional polymeric [Ag2(μ-Hpydc)2(μ-pyz)]n (1) (H 2 pydc = pyridine-2,3-dicarboxylic acid, pyz = pyrazine), has been synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and single crystal X-ray diffraction. X-ray diffraction analyses show that Hpydc exhibits novel coordination mode in 1, acts as a bri...

A dinuclear neutral silver(l) complex, [Ag-2(Hpyzdc)(2)(mu-dmpyz)] (1) (H(2)pydc = pyrazine-2,3-dicarboxylic acid, dmpyz = 2,3-dimethylpyrazine), has been synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and single crystal X-ray diffraction. X-ray diffraction data have shown that the Hpydc ligands in 1 act as b...

The complexes [Co(C4H4O4)](n) (1) and [Zn(im)(2)(C4H4O4)](n) (2) (C4H4O4 = succinate dianion, suc; im = imidazole) have been synthesized solvothermally and characterized by elemental analysis, IR, TG-DTA, and single-crystal X-ray diffraction techniques. Complex 1 is the first anhydrous member of the cobalt succinate family and has high thermal stab...

We report a solid-state photochemical rearrangement reaction by which aromatic N-chloroamides exposed to UV light or sunlight are rapidly and efficiently converted to chloroaromatic amides. The course, the intermediate (nascent chlorine vs dichlorine) and the outcome of the reaction depend on the excitation (exposure time, wavelength, and intensity...

Bis(triethanolamine)strontium(II) saccharinate, [Sr(tea)2](sac)2 was synthesized and characterized by IR spectroscopy, thermal analysis and X-ray diffraction techniques. The compound crystallizes in orthorhombic system and consists of two sac anions and a complex cation, in which each tea ligand behaves as a tetradentate ligand and their configurat...

Trans-bis(ethanolamine)bis(saccharinato)mercury(II), [Hg(ea)(2)(sac)(2)], where ea and sac denote the ethanolamine molecule and the saccharinate anion, respectively, crystallizes in the triclinic space group P (1) over bar (No. 2) with a = 9.4651 (5), b = 10.4365 (5), c = 11.9314 (6) Angstrom, alpha = 84.402(1)degrees beta = 78.313(1)degrees, gamma...

The structure of the title complex consists of isolated [Cd(C7H4NO3S)2(C4H11NO2)2] units. The Cd2+ cation lies on an inversion centre and is octahedrally coordinated by two N,O-bidentate diethanolamine (dea) and two N-bonded saccharinate (sac) ligands [saccharin is 1,2-benzisothiazol-3(2H)-one 1,1-dioxide]. The dea ligands constitute the equatorial...

Bis(pyridine-2,6-dimethanol-N,O,O')cobalt(II) disaccharinate dihydrate, [Co(C7H9NO2)2](C7H4NO3S)2*2H2O, (I), and bis(pyridine-2,6-dimethanol-N,O,O')copper(II) disaccharinate dihydrate, [Cu(C7H9NO2)2](C7H4NO3S)2*2H2O, (II), collectively [M(dmpy)2](sac)2*2H2O (where M is Co(II) or Cu(II), sac is the saccharinate anion and dmpy is pyridine-2,6-dimetha...

The thermal decomposition behaviour of triethanolamine (TEA) and monoethanolethylenediamine (me-en) complexes of Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) saccharinates was studied under non-isothermal conditions by TG, DTA and DTG in dynamic nitrogen atmosphere. The decomposition of the TEA complexes proceeds via three main stages....

The structures of the title triethanolamine (tea) complexes of Cd(II) and Hg(II) saccharinates, bis(triethanolamine)-kappa3O,N,O';kappa4O,N,O',O"-cadmium(II) 1,2-benzisothiazol-3(2H)-onate 1,1-dioxide, [Cd(C6H15NO3)2](C7H4NO3S)2, (I), and bis(triethanolamine)-kappa3O,N,O';kappa4O,N,O',O"-mercury(II) 1,2-benzisothiazol-3(2H)-onate 1,1-dioxide, [Hg(C...

The novel transition metal saccharinate complexes of triethanolamine (TEA) have been synthesized and characterized by elemental analyses, magnetic moments, UV-Vis and IR spectra. Mn(II), Co(II), Ni(II), Zn(II), Cd(II) and Hg(II) form mononuclear complexes of [M(TEA)2](SAC)2, where SAC is the saccharinate ion, while the Cu(II) complex is dimeric. Th...

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...

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...

The structure of the title complex, [Zn(C6H15NO3)2](C7H4NO3S)2, consists of a complex cation and two saccharinate (sac) anions. In the complex cation, the zinc(II) ion is octahedrally coordinated by two tridentate (N,O,O′) triethano­lamine (tea) ligands with a facial distribution. Two ethanol groups of each tea ligand form two five-membered chelate...

New mixed ligand Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) complexes of saccharin (sac) with ethanolamine (ea) and diethanolamine (dea) were synthesized and characterized by elemental analyses, magnetic moments, UV–Vis and IR spectra. The Co(II)–ea, Co(II)–dea and Cu(II)–dea complexes are dimeric, while all the other complexes of ea and dea...

In the title complex, [Cu(C(7)H(4)NO(3)S)(2)(C(2)H(7)NO)(2)], the Cu(II) centre lies on an inversion centre and exhibits octahedral coordination, with the two ethanolamine (Hea) and two saccharinate [sac; anionic 1,2-benzisothiazol-3(2H)-one 1,1-dioxide] ligands in a trans configuration. The bidentate Hea ligands bridge axial and equatorial positio...

The structure of the title compound, [Ni(C6H15NO3)(2)](C7H4NO3S)(2), consists of a cationic [Ni(TEA)(2)](2+) and two anionic (SAC)(-) moieties (TEA is triethanolamine and SAC is the saccharinate anion). Two TEA ligands coordinate to the NiII ion through four O atoms and two N atoms acting as tridentate ligands (N,O,O') in a distorted octahedral env...

A novel manganese complex, [Mn(phen)(2)(H2O)(2)](sac)(2).H2O, was synthesized by the reaction of [Mn(sac)(2)(H2O)(4)]. 2H(2)O with 1,10-phenantroline in aqueous solution and characterized by elemental analysis, IR spectral evidence, magnetic measurements, thermal analysis and single crystal X-ray diffraction. The compound crystallizes in triclinic...

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...

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...

A series of new mixed-ligand saccharin complexes of Co, Ni, Cu and Zn with 1,10-phenantroline, phenylhydrazine and benzidine have been prepared and characterized by elemental analysis magnetic moments, spectral and thermal analysis techniques. 1,10-Phenantroline and phenylhydrazine are coordinated to the metal ions as chelating ligands through thei...

The coordination adducts of MnCl2, FeCl3, CoCl2, NiCl2 and CuCl2 with DMF were isolated and characterized by elemental analysis, magnetic moments, UV-VIS spectroscopy, IR spectroscopy and thermal analysis techniques. The shift of the CO stretching vibration to low frequency indicated that DMF is bonded through oxygen to the metals. On the basis of...

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