ELECTROINITIATED POLYMERIZATION OF BIS(TRIBROMOPHENOXO)-N,N,N',N'-TETRAMETHYLETHYLENEDIAMINE COPPER(II) COMPLEX

Date

1990-01-01

Author

Akbulut, Ural
KISAKUREK, D
Toppare, Levent Kamil

Metadata

Show full item record

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

Item Usage Stats

136
views

0
downloads

Tribromophenol copper(II) complexes with ligands such as pyridine and ethylenediamine are known to polymerize thermally. Generally, high temperature is required for thermal polymerization of such complexes. Thermal polymerization of trihalophenol copper(II) complexes in toluene has an induction period of c. 30 min. Electroinitiated polymerization of trihalophenol copper(II) complexes has also been accomplished recently using pyridine or ethylenediamine as ligands. However, the above mentioned copper(II) complexes cannot be polymerized electro‐chemically in acetonitrile. When pyridine and ethylenediamine are used as ligands, such complexes rapidly polymerize in acetonitrile without the passage of any current even at room temperature. Therefore, the electrochemical polymerization of trihalophenol copper(II) complexes with pyridine and ethylenediamine ligands must be carried out in dimethylformamide. In the present work, electroinitiated polymerization of bis(2,4,6‐tribromo‐phenoxo)‐N,N,N′,N′‐tetramethylethylenediamine copper(II) complex (TBPTD) was accomplished for the first time in acetonitrile. When N,N,N′,N′‐tetramethylethylene diamine is used as the ligand in the preparation of tribromophenol copper(II) complex it is found that acetonitrile can be used as solvent. This complex does not polymerize in acetonitrile without the application of potential. Electroinitiated polymerization of TBPTD was carried out by constant potential electrolysis, at each anodic peak potential of the complex. These potentials of TBPTD were measured, in advance, by cyclic voltammetry in acetonitrile. Electrolysis of TBPTD yielded polymers in the anode compartment only. Electroinitated polymerization of this monomer exhibited no induction period in contrast to the case of thermal polymerization. The reacted monomer concentration was simultaneously followed by cyclic voltammetry, in the same electrolysis cell. This process was accomplished by a specially designed H‐type cell equipped with six electrodes. Use of cyclic voltammetry for simultaneous in‐situ monitoring of reacted monomer concentrations was found to be more accurate, quicker and more reproducible than gas chromatography or spectroscopy. Polymers were characterized by FTIR, 1HNMR, and 13CNMR spectral analyses as well as measurement of molecular weight by the isopiestic method.

Subject Keywords

General Engineering, General Materials Science

URI

https://hdl.handle.net/11511/40414

Journal

BRITISH POLYMER JOURNAL

DOI

https://doi.org/10.1002/pi.4980220110

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Theoretical and experimental considerations on poly(dihalophenylene oxide)s Kisakürek, Duygu (Wiley, 1988) The decomposition of copper(II) trihalophenoxides in acetonitrile yields poly(dihalophenylene oxide)s. A 1H n.m.r. study has shown that a bromine atom in the 4‐position of the trihalophenoxides results in polymers having higher linearity. Various dynamic and static methods, within the framework of Hückel molecular orbital theory, have been used to explain the product distribution.
ELECTROINITIATED POLYMERIZATION OF ACRYLONITRILE YURTTAS, B; Toppare, Levent Kamil; Akbulut, Ural (Informa UK Limited, 1988-01-01) Anionic polymerization of acrylonitrile was achieved by constant-potential electrolysis via direct electron transfer to the monomer. The reduction peak potential in the (C4 H9)4 NBF4 -CH3 CN electrolyte-solvent system was measured by cyclic voltammetry. On the other hand, dimethylformamide-metal salts were not found suitable for the direct electron-transfer process in our system. Polymers produced both anodically and cathodically were found to contain cyclized structures.
Nanoceria-Supported Ruthenium(0) Nanoparticles: Highly Active and Stable Catalysts for Hydrogen Evolution from Water Demir Arabacı, Elif; Önal, Ahmet Muhtar (American Chemical Society (ACS), 2018-02-21) Ruthenium(0) nanoparticles supported on nanoceria (Ru-0/CeO2) were prepared by reduction of Ru3+ ions on the surface of ceria using aqueous solution of NaBH4. The Ru-0/CeO2 samples were characterized by advanced analytical tools and employed as electrocatalysts on the glassy carbon electrode (GCE) in hydrogen evolution from water. The GCE, modified by Ru-0/CeO2 (1.86 wt % Ru), provides an incredible electrocatalytic activity with a high exchange current density of 0.67 mA.cm(-2), low overpotential of 47 mV ...
Electrical properties and photoconductivity of polyaniline/sulfonated poly(arylene ether sulfone) composite films Sankir, Nurdan D.; Sankir, Mehmet; Parlak, Mehmet (Springer Science and Business Media LLC, 2009-05-01) Temperature dependent electrical conductivity of the polyaniline-sulfonated poly(arylene ether sulfone) with 35 mol percent sulfonation (PANI-BPS35) composite films were investigated in the temperature range of 80-380 K. These composite films showed semiconductor behavior with the exponential variation of inverse temperature dependence of electrical conductivity. Calculated Mott's parameters showed that variable range hopping mechanism is the dominant transport mechanism for the carriers in low temperature ...
Thermal behaviour of some metal complexes of N,N-diethyl-N'-benzoyl thiourea Merdivan, M; Aygün, Rüveyde Sezer; Kulcu, N (Springer Science and Business Media LLC, 1997-06-01) The thermal behaviour of the complexes of N,N-diethyl-N'-benzoylthiourea (DEBT) with NI(II), Cu(II), Pt(II), Pd(II) and Ru(III) was studied using differential thermal analysis (DTA) and thermogravimetry (TG). These complexes undergo only a pyrolytic decomposition process. A gas chromatography-mass spectrometry combined system was used for the verification of the first decomposition product and X-ray diffraction method for the characterization of the final products of pyrolysis.

Citation Formats

U. Akbulut, D. KISAKUREK, and L. K. Toppare, “ELECTROINITIATED POLYMERIZATION OF BIS(TRIBROMOPHENOXO)-N,N,N’,N’-TETRAMETHYLETHYLENEDIAMINE COPPER(II) COMPLEX,” BRITISH POLYMER JOURNAL, pp. 65–71, 1990, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40414.