Extended x‐ray absorption fine structure: Studies of zinc‐neutralized sulfonated polystyrene ionomers
Extended x‐ray absorption fine structure: Studies of zinc‐neutralized sulfonated polystyrene ionomers
复制标题
DOI：
10.1063/1.334301
复制
发表时间：
1984-11
影响因子：
3.2
通讯作者：
Y. S. Ding;D. J. Yarusso;H. Pan;S. Cooper
中科院分区：
文献类型：
--
作者：
Y. S. Ding;D. J. Yarusso;H. Pan;S. Cooper
对一系列锌中和的磺化聚苯乙烯离聚物进行扩展X射线吸收精细结构（EXAFS）测量，并确定锌原子周围的局部结构。发现这些材料中硫原子和氧原子之间的EXAFS信号的干涉效应很显着。提出了锌中和的磺化聚苯乙烯离聚物中局部结构的模型，该模型表明锌原子周围的氧以1.97±0.02 A的距离高度有序地配位。此外，在3.15±0.05埃的距离处有四个硫原子和四个氧原子。在本研究中未检测到5A内的锌-锌配位。
Extended x‐ray absorption fine structure (EXAFS) measurements were performed on a series of zinc‐neutralized sulfonated polystyrene ionomers and the local structure around the zinc atom was determined. An interference effect in the EXAFS signal between sulfur and oxygen atoms was found to be significant in these materials. A model for the local structure in the zinc‐neutralized sulfonated polystyrene ionomers is proposed which suggests a highly ordered tetrahedral coordination of oxygen around the zinc atoms at a distance of 1.97±0.02 A. In addition there are four sulfur atoms and four oxygen atoms at a distance of 3.15±0.05 A. No zinc‐zinc coordination within 5 A was detected in this study.