Effect of N-methylimidazole and 3,5-dimethylpyrazole ligands on the polymerization of di(2,6-dichlorophenolato) Cu(II)/Co(II) complexes in the solid state

Date

2004-03-15

Author

Baştürkmen, M.
Hacaloğlu, Jale
Kisakürek, D.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

239
views

0
downloads

The polymerization of 2,6-dichlorophenol (DCPH) was achieved through the thermal decomposition of copper complexes of DCPH with N-methylimidazole (NMIz) and 3,5-dimethylpyrazole (DMPz) ligands. Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), mass spectrometry, ultraviolet-visible spectroscopy, diffuse reflectance spectroscopy, magnetic susceptibility balance, electron spin resonance, X-ray analysis, and elemental analysis were used to characterize the complexes. The polymerization was achieved either in the solid state or in the melt. The structural analyses were performed with FTIR and NMR spectroscopy analyses. The glass-transition temperatures were determined by DSC, and the intrinsic viscosities were determined by viscosimetry. The effects of the temperature and time on the conversion percentage and viscosity of the polymers were examined. Varying the decomposition temperature during a 3-h scan showed that the DMPz complex of Cu decomposed at lower temperatures than the NMIz complex, whereas the NMIz complex yielded a higher conversion to the polymer. Complexes of DCPH with NMIz and DMPz ligands produced 1,2- and 1,4-addition products, respectively.

Subject Keywords

Solid-state polymerization, Transition metal chemistry

URI

https://hdl.handle.net/11511/32251

Journal

Journal of Applied Polymer Science

DOI

https://doi.org/10.1002/app.13541

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Effect of N-methyl imidazole and dimethyl pyrazole ligands on polymerization of di(2,4,6-trichlorophenolato)Cu(II)/Co(II) complexes in solid state Kisakurek, D (Informa UK Limited, 2004-08-01) Polymerization of 2,4,6-trichlorophenol (TCPH) was achieved through the thermal decomposition of the copper and cobalt complexes of TCPH with N-containing ligands [N-methyl imidazole (NMIz) and 3,5-dimethyl pyrazole (DMPz)). The structural analysis of the complexes was performed by using Fourier transform infrared (FTIR), differential scanning calorimetry (DSC), mass (MS), UV-VIS, diffuse reflectance (DRS) and electron spin resonance (ESR) spectroscopies, magnetic susceptibility balance and elemental analys...
Effect of swaging on microstructure and tensile properties of W-Ni-Fe alloys DURLU, NURİ; Caliskan, N. Kaan; Bor, Sakir (Elsevier BV, 2014-01-01) The objective of this study was to investigate the effect of swaging on the microstructure and tensile properties of high density two phase alloys 90W-7Ni-3Fe and 93W-4.9Ni-2.1Fe. Samples were liquid phase sintered under hydrogen and argon at 1480 degrees C for 30 min and then 15% cold rotary swaged. Measurement of microstructural parameters in the sintered and swaged samples showed that swaging slightly increased tungsten grain size in the longitudinal direction and slightly decreased tungsten grain size i...
Synthesis and characterization of poly(dibromophenylene oxide)s through thermal decomposition of various transition metal complexes in solid state. Şanlı, Pınar; Kısakürek, Duygu; Aras, Leyla; Department of Chemistry (2002) In this study, synthesis and characterization of poly(dibromophenylene oxide)s though thermal decomposition of bis(2,4,6-tribromophenolato)di(N- methyl imidazole) Cu(II), bis(2,4,6-tribromophenolato)di(N-methyl illimidazole)Co(II) and bis(2,4,6-tribromophenolato)di(N-methyl imidazole)Ni(II) complexes in solid state was examined. For the characterization of complexes FTIR, DSC, mass spectroscopy, magnetic susceptibility and C, H,N elemental analysis were performed. Syntheses of the polymer were achieved by t...
Effect of Nb addition on the critical parameters of BSCCO superconductor Sozeri, H.; Ghazanfari, N.; Oezkan, H.; Kılıç, Adnan; Hasanlı, Nızamı (2007-04-12) Pure and Nb2O5 added Bi1.6Pb0.4NbxSr2Ca2Cu3O delta superconductors (0 <= x <= 0.30) were synthesized by the ammonium nitrate melt route. Fraction of the high T-c 2223 phase increases with addition of small amounts of Nb. AC susceptibility and transport measurements showed the optimum Nb concentration as x = 0.10. Nb additions above x = 0.20 decrease significantly the fraction of the high-T-c phase and degrade the superconducting properties.
Effect of Au on the crystallization of germanium thin films by electron-beam evaporation EYGİ, ZEYNEP DENİZ; KULAKCI, MUSTAFA; Turan, Raşit (2014-11-01) Metal induced crystallization is a widely used method to form crystalline/polycrystalline structures at low temperatures. In this work, Au was applied to enhance the crystallization of amorphous Ge films. Ge films with thicknesses of similar to 1.5 mu m were fabricated by electron beam evaporation on c-Si substrate with and without very thin Au layer. Crystallization properties of Ge films were analyzed for different growth and post annealing temperatures varied between 270 degrees C and 730 degrees C. The ...

Citation Formats

M. Baştürkmen, J. Hacaloğlu, and D. Kisakürek, “Effect of N-methylimidazole and 3,5-dimethylpyrazole ligands on the polymerization of di(2,6-dichlorophenolato) Cu(II)/Co(II) complexes in the solid state,” Journal of Applied Polymer Science, pp. 3797–3805, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32251.