DL-2-氨基4-磺酸基-丁酸与金属离子相互作用的研究

运用傅里叶变换红外光谱技术，对DL-2-氨基-4-磺酸基丁酸(DLH)与Na+,Cu2+,Zn2+和Ni2+ 形成的配合物进行了研究，并用元素分析的方法确定配合物的组成。红外光谱显示DLH分子中的—COOH，—NH+₃和—SO-₃ 基团均可与金属离子发生直接或间接的相互作用。不同过渡金属离子与氨基、羧基相互作用的强度顺序均为： Cu2+＞Zn2+＞Ni2+,其中羧基与不同离子可能采取了不同的配位方式。

Study on the DL-Homocysteic Acid Interacting with Metal Ions

The complexes of DL-homocysteic acid(DLH) with Na ,Cu2 ,Zn2 and Ni2 were synthesized and elemental analyses were used to detect the compositions of these complexes.FTIR spectroscopy was employed to study these coordination structures.The results indicated that all the amino,carboxyl and sulfonate groups of DLH may have direct or indirect interactions with Na ,Cu2 ,Zn2 and Ni2 .The bond strength between metal ions and oxygen of the carboxyl as well as that between metal ions and the amino group are in the order of Cu2 >Zn2 >Ni2 ,where carboxyl with different ions may take different coordination modes in these complexes,as indicated from the difference between its asymmetric and symmetric stretching vibration.