乙酰丙酮缩对羟基苯甘氨酸钠席夫碱聚合物的合成及晶体结构

摘要

在碱性条件下,通过乙酰丙酮与L-对羟基苯甘氨酸缩合生成了席夫碱配位聚合物,采用元素分析、红外光谱、1H NMR及单晶X射线衍射等方法对该聚合物进行了表征.结构分析表明,聚合物中乙酰丙酮缩对羟基苯甘氨酸结构单元通过酚氧原子O（3）、相邻席夫分子的羰基氧原子O（4）与同一Na＋配位,席夫分子首尾相连,形成双链结构,双链间通过羧基O（2）与Na＋桥连,在空间上拓展为一2D网状结构.%A Schiff bases coordination polymer derived from L-4-hydroxyphenylglycine and acetylacetone has been successfully synthesized and characterized by the methods of elemental analysis,IR,1H NMR,single-crystal X-ray diffraction analysis and so on.The results revealed that phenolic oxygen O（3） and carbonyl oxygen atoms O（4） from the adjacent Schiff bases moleculars coordinated with the same sodium ions,which resulted in the formation of a double-stranded chain.The double-stranded chains were further bridged by coordinations of carboxyl O（2） atom and sodium ions formed a 2D network structure.