Güneş Kürkçüoğlu | Eskisehir Osmangazi University, Turkey (original) (raw)
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Papers by Güneş Kürkçüoğlu
Journal of Inorganic and Organometallic Polymers and Materials
Journal of Molecular Structure
Journal of Molecular Structure
Journal of Molecular Structure
Journal of Molecular Structure
Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering, 2016
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, Jan 5, 2015
The heteronuclear tetracyanonickelate(II) complexes of the type [M(etim)Ni(CN)4]n (hereafter, abb... more The heteronuclear tetracyanonickelate(II) complexes of the type [M(etim)Ni(CN)4]n (hereafter, abbreviated as M-Ni-etim, M=Mn(II), Fe(II) or Co(II); etim=1-ethylimidazole, C5H8N2) were prepared in powder form and characterized by FT-IR and Raman spectroscopy, powder X-ray diffraction (PXRD), thermal (TG; DTG and DTA), and elemental analysis techniques. The structures of these complexes were elucidated using vibrational spectra and powder X-ray diffraction patterns with the peak assignment to provide a better understanding of the structures. It is shown that the spectra are consistent with a proposed crystal structure for these compounds derived from powder X-ray diffraction measurements. Vibrational spectra of the complexes were presented and discussed with respect to the internal modes of both the etim and the cyanide ligands. The C, H and N analyses were carried out for all the complexes. Thermal behaviors of these complexes were followed using TG, DTG and DTA curves in the tempera...
Zeitschrift Fur Kristallographie, 2015
The dinuclear complex tris(2-aminoethyl)aminezinc(II)-μ-cyanothreecyanozincate(II) hemihydrate, [... more The dinuclear complex tris(2-aminoethyl)aminezinc(II)-μ-cyanothreecyanozincate(II) hemihydrate, [Zn(tren)Zn(μ-CN)(CN)
[
Tribology and Interface Engineering Series, 2011
The cyano-bridged heteronuclear polymeric complex, [Cd(pyr) 2 Ni(l-CN) 4 ] n , 1 (pyr = 3-pyrroli... more The cyano-bridged heteronuclear polymeric complex, [Cd(pyr) 2 Ni(l-CN) 4 ] n , 1 (pyr = 3-pyrroline or 2,5dihydropyrrole), has been synthesized and characterized by FT-IR, Raman spectroscopy, thermal and elemental analyses. The crystal structure of 1 has been determined by X-ray single crystal diffraction. The complex crystallizes in orthorhombic system and space group Pmna. In 1, Ni(II) ion is coordinated by four cyano ligands, and the Cd(II) ion is coordinated by four bridging cyanide ligands and two trans pyr ligands. The coordination environment of the Cd(II) ion described as distorted octahedral geometry, whereas around the Ni(II) centre has square planar geometry. The crystallographic analysis reveals that the weak intermolecular C-HÁÁÁNi interaction was found to be hydrogen bonding interaction, resulting in a 3D framework. Vibration assignments were given for all the observed bands and the spectral feature also supported to the structure of polymeric complex. The decomposition reaction take places in the temperature range 30-700°C in the static air atmosphere.
![Research paper thumbnail of Syntheses, spectral and thermal analyses of heteronuclear aqua(2-methylpyrazine)metal(II) complexes with tetracyanonickelate ion and crystal structure of supramolecular [Cd(H2O)(2mpz)Ni(μ-CN)4]n complex](https://attachments.academia-assets.com/74873784/thumbnails/1.jpg)
](Structural Chemistry, Oct 29, 2008
Polymeric tetracyanonickelate complexes of the type [M(H 2 O)(2mpz)Ni(l-CN) 4 ] n (2mpz = 2-methy... more Polymeric tetracyanonickelate complexes of the type [M(H 2 O)(2mpz)Ni(l-CN) 4 ] n (2mpz = 2-methylpyrazine, M = Mn(II) (1) or Cd(II) (2)) have been prepared and characterized by FT-IR, Raman spectroscopy, thermal, and elemental analyses. The crystal structure of supramolecular [Cd(H 2 O)(2mpz)Ni(CN) 4 ] n complex has been determined by X-ray single crystal diffraction. It crystallizes in the orthorhombic system, space group Pnma. The structure consists of corrugated and cyanide-bridged polymeric two-dimensional networks. In the Hofmann-type complexes, the coordination environment of the M(II) ions can be described as distorted octahedral geometry, whereas around the Ni(II) center has square planar geometry. The spectral features suggest that the 2mpz is coordinated to metal ions of the adjacent layers of [M-Ni(CN) 4 ] n as monodentate ligand. The thermal decomposition of these complexes takes place in three stages: (i) dehydration, (ii) decomposition of the 2-methylpyrazine ligands, and (iii) release of the CN groups and burning of organic residue. Keywords Cyano-bridging complexes Á Tetracyanonickelate Á 2-Methylpyrazine complexes Á Vibrational spectra 2complexes have been reported [5-7, 9-15, 18-26];
Czechoslovak Journal of Physics, Jan 9, 1991
A review of ideas leading to full rejection of any finite or partially-infinite order kinetic equ... more A review of ideas leading to full rejection of any finite or partially-infinite order kinetic equation linearized in external field is given on grounds of the time-convolution Generalized Master Equations (GME). By two examples (two-level and band conduction problem), it is shown how standard kinetic equations result from GME in the lowest order approximations which obscure, however, a direct correspondence with the Kubo linear response theory. Without approximations, on the other hand, the rigorous approach is shown to be fully equivalent with the Kubo results. It is argued and illustrated that usual technical simplicity and seeming physical hmidity of standard theories (connected with the presence of field-independent transfer or scattering rates in the fielddependent linearized theory) are just owing to structural features which are solely due to the lowest order approximations involved. These features (i.e. also the possibility of standard physical interpretation of kinetic phenomena) are proved to disappear completely as far as the theory goes properly to higher orders.
J Inorg Organomet Polym Mater, 2011
Two novel cyano-bridged heteropolynuclear complexes, [Cd(im) 4 Ni(l-CN) 2 (CN) 2 ] n (1) and [Cd(... more Two novel cyano-bridged heteropolynuclear complexes, [Cd(im) 4 Ni(l-CN) 2 (CN) 2 ] n (1) and [Cd(mim) 2 Ni(l-CN) 4 ] n (2) (im: imidazole and mim: 2-methylimidazole), have been synthesized and characterized. In 1, the trans-directed cyanide ligands of [Ni(CN) 4 ] 2anions link two [Cd(im) 4 ] 2? units, whereas in 2, all the cyanide groups take part in bonding with two adjacent [Cd(mim) 2 ] 2? units, resulting 1D and 2D coordination polymers, respectively. The coordination environment of the Cd(II) ion described as distorted octahedral geometry, whereas around the Ni(II) centre had square planar geometry in both complexes. The crystals packing of 1 and 2 were a composite of hydrogen bonding, pÁÁÁp and C-HÁÁÁNi interactions.
Journal of Molecular Structure, 2016
J Inorg Organomet Polym Mater, 2009
Journal of Inorganic and Organometallic Polymers and Materials
Journal of Molecular Structure
Journal of Molecular Structure
Journal of Molecular Structure
Journal of Molecular Structure
Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering, 2016
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, Jan 5, 2015
The heteronuclear tetracyanonickelate(II) complexes of the type [M(etim)Ni(CN)4]n (hereafter, abb... more The heteronuclear tetracyanonickelate(II) complexes of the type [M(etim)Ni(CN)4]n (hereafter, abbreviated as M-Ni-etim, M=Mn(II), Fe(II) or Co(II); etim=1-ethylimidazole, C5H8N2) were prepared in powder form and characterized by FT-IR and Raman spectroscopy, powder X-ray diffraction (PXRD), thermal (TG; DTG and DTA), and elemental analysis techniques. The structures of these complexes were elucidated using vibrational spectra and powder X-ray diffraction patterns with the peak assignment to provide a better understanding of the structures. It is shown that the spectra are consistent with a proposed crystal structure for these compounds derived from powder X-ray diffraction measurements. Vibrational spectra of the complexes were presented and discussed with respect to the internal modes of both the etim and the cyanide ligands. The C, H and N analyses were carried out for all the complexes. Thermal behaviors of these complexes were followed using TG, DTG and DTA curves in the tempera...
Zeitschrift Fur Kristallographie, 2015
The dinuclear complex tris(2-aminoethyl)aminezinc(II)-μ-cyanothreecyanozincate(II) hemihydrate, [... more The dinuclear complex tris(2-aminoethyl)aminezinc(II)-μ-cyanothreecyanozincate(II) hemihydrate, [Zn(tren)Zn(μ-CN)(CN)
[
Tribology and Interface Engineering Series, 2011
The cyano-bridged heteronuclear polymeric complex, [Cd(pyr) 2 Ni(l-CN) 4 ] n , 1 (pyr = 3-pyrroli... more The cyano-bridged heteronuclear polymeric complex, [Cd(pyr) 2 Ni(l-CN) 4 ] n , 1 (pyr = 3-pyrroline or 2,5dihydropyrrole), has been synthesized and characterized by FT-IR, Raman spectroscopy, thermal and elemental analyses. The crystal structure of 1 has been determined by X-ray single crystal diffraction. The complex crystallizes in orthorhombic system and space group Pmna. In 1, Ni(II) ion is coordinated by four cyano ligands, and the Cd(II) ion is coordinated by four bridging cyanide ligands and two trans pyr ligands. The coordination environment of the Cd(II) ion described as distorted octahedral geometry, whereas around the Ni(II) centre has square planar geometry. The crystallographic analysis reveals that the weak intermolecular C-HÁÁÁNi interaction was found to be hydrogen bonding interaction, resulting in a 3D framework. Vibration assignments were given for all the observed bands and the spectral feature also supported to the structure of polymeric complex. The decomposition reaction take places in the temperature range 30-700°C in the static air atmosphere.
Structural Chemistry, Oct 29, 2008
Polymeric tetracyanonickelate complexes of the type [M(H 2 O)(2mpz)Ni(l-CN) 4 ] n (2mpz = 2-methy... more Polymeric tetracyanonickelate complexes of the type [M(H 2 O)(2mpz)Ni(l-CN) 4 ] n (2mpz = 2-methylpyrazine, M = Mn(II) (1) or Cd(II) (2)) have been prepared and characterized by FT-IR, Raman spectroscopy, thermal, and elemental analyses. The crystal structure of supramolecular [Cd(H 2 O)(2mpz)Ni(CN) 4 ] n complex has been determined by X-ray single crystal diffraction. It crystallizes in the orthorhombic system, space group Pnma. The structure consists of corrugated and cyanide-bridged polymeric two-dimensional networks. In the Hofmann-type complexes, the coordination environment of the M(II) ions can be described as distorted octahedral geometry, whereas around the Ni(II) center has square planar geometry. The spectral features suggest that the 2mpz is coordinated to metal ions of the adjacent layers of [M-Ni(CN) 4 ] n as monodentate ligand. The thermal decomposition of these complexes takes place in three stages: (i) dehydration, (ii) decomposition of the 2-methylpyrazine ligands, and (iii) release of the CN groups and burning of organic residue. Keywords Cyano-bridging complexes Á Tetracyanonickelate Á 2-Methylpyrazine complexes Á Vibrational spectra 2complexes have been reported [5-7, 9-15, 18-26];
Czechoslovak Journal of Physics, Jan 9, 1991
A review of ideas leading to full rejection of any finite or partially-infinite order kinetic equ... more A review of ideas leading to full rejection of any finite or partially-infinite order kinetic equation linearized in external field is given on grounds of the time-convolution Generalized Master Equations (GME). By two examples (two-level and band conduction problem), it is shown how standard kinetic equations result from GME in the lowest order approximations which obscure, however, a direct correspondence with the Kubo linear response theory. Without approximations, on the other hand, the rigorous approach is shown to be fully equivalent with the Kubo results. It is argued and illustrated that usual technical simplicity and seeming physical hmidity of standard theories (connected with the presence of field-independent transfer or scattering rates in the fielddependent linearized theory) are just owing to structural features which are solely due to the lowest order approximations involved. These features (i.e. also the possibility of standard physical interpretation of kinetic phenomena) are proved to disappear completely as far as the theory goes properly to higher orders.
J Inorg Organomet Polym Mater, 2011
Two novel cyano-bridged heteropolynuclear complexes, [Cd(im) 4 Ni(l-CN) 2 (CN) 2 ] n (1) and [Cd(... more Two novel cyano-bridged heteropolynuclear complexes, [Cd(im) 4 Ni(l-CN) 2 (CN) 2 ] n (1) and [Cd(mim) 2 Ni(l-CN) 4 ] n (2) (im: imidazole and mim: 2-methylimidazole), have been synthesized and characterized. In 1, the trans-directed cyanide ligands of [Ni(CN) 4 ] 2anions link two [Cd(im) 4 ] 2? units, whereas in 2, all the cyanide groups take part in bonding with two adjacent [Cd(mim) 2 ] 2? units, resulting 1D and 2D coordination polymers, respectively. The coordination environment of the Cd(II) ion described as distorted octahedral geometry, whereas around the Ni(II) centre had square planar geometry in both complexes. The crystals packing of 1 and 2 were a composite of hydrogen bonding, pÁÁÁp and C-HÁÁÁNi interactions.
Journal of Molecular Structure, 2016
J Inorg Organomet Polym Mater, 2009