甘氨酸铝锆的制备与红外光谱研究

Preparation and IR Spectra Study of the Aluminum-Zirconium Glycine

以结晶氯化铝、氧氯化锆、甘氨酸为原料,通过分步溶解再混溶制备了甘氨酸铝锆水溶液,讨论了其稳定性,确定了较佳原料配比m(结晶氯化铝)/m(氧氯化锆)/m(甘氨酸)=12.46/8.00/16.39。并采用分步升温的烘干方法制得固体。进行了铝形态分布分析,测定了红外光谱,指认了其主要红外吸收带的归属。计算了羧基的反对称和对称伸缩振动频率的差值Δυ=154.73cm-1,说明甘氨酸通过羧基与金属离子配位形成的化学键为离子键。

Using aluminum chloride, zirconium oxide chloride hydrate and glycine as materials through separate dissolution and then mixed, the title complex was synthesized in aqueous solution whose stability was discussed and the preferable mass ratio of the aluminum chloride, zirconium oxide chloride hydrate and glycine is 12.46/8.00/16.39, and then dried at the different temperatures. The compositions of the complex were analyzed and Al（Ⅲ） speeiation in ZAG solution was studied. The IR spectra of the complex was measured and the principal IR bands were assigned. According to the magnitude of separation （△υ= 154.73cm^-1） between the frequencies due to υas （COO^-） and υs （COO^-） in the complex, the results are concluded that glycine molecule coordinates to metal ion through carboxyl groups, the character of the coordinate bonds is electrovalent bond.