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首页> 外文期刊>Polymers for advanced technologies >Study of cobalt(II)-chitosan coordination polymer and its catalytic activity and selectivity for vinyl monomer polymerization
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Study of cobalt(II)-chitosan coordination polymer and its catalytic activity and selectivity for vinyl monomer polymerization

机译：钴（II）-壳聚糖配位聚合物及其对乙烯基单体聚合的催化活性和选择性的研究

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A cobalt(II)-chitosan coordination polymer has been prepared by soaking a chitosan film in CoCl{sub}2 aqueous solution. The results have been investigated by means of X-ray photoelectron spectroscopy (XPS), Fourier Transform infrared FT-IR spectroscopy, thermal analysis and electrical conductivity measurements. The XPS and FT-IR spectra reveal that the chitosan coordinated with cobalt(II) through both oxygen and nitrogen atoms in the chitosan chain. The XPS results show that the coordination polymer possess the same shake-up peaks with CoCl{sub}2, indicating that the cobalt(II)-chitosan coordination polymer is high spin and the coordination number of cobalt(II) centers is four, and the electrical conductivity measurements confirm this result. Also, cobalt(II) coordination polymer can be used as a catalyst, and the polymerization of vinyl acetate was carried out in the presence of the coordination polymer/Na{sub}2SO{sub}3/H{sub}2O at pH 7 and normal temperature. The poly-vinyl acetate possessed a random structure.
机译：通过将壳聚糖膜浸入CoCl {sub} 2水溶液中来制备钴（II）-壳聚糖配位聚合物。通过X射线光电子能谱（XPS），傅立叶变换红外FT-IR光谱，热分析和电导率测量来研究结果。 XPS和FT-IR光谱表明，壳聚糖通过壳聚糖链中的氧和氮原子与钴（II）配位。 XPS结果表明，配位聚合物与CoCl {sub} 2具有相同的振荡峰，表明钴（II）-壳聚糖配位聚合物具有高自旋性，钴（II）中心的配位数为4，并且电导率测量结果证实了这一结果。另外，可以使用钴（II）配位聚合物作为催化剂，并且乙酸乙烯酯的聚合在配位聚合物/ Na {sub} 2SO {sub} 3 / H {sub} 2O的存在下于pH 7下进行。和正常温度。聚乙酸乙烯酯具有无规结构。

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