[DL-高胱氨酸与金属离子相互作用的研究]

[Study on the DL-homocysteic acid interacting with metal ions].

作者信息

Jia Hui-Zhen, Liu Yu-Feng, Li Wei-Hong, Wu Jin-Guang

机构信息

State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2007 Jul;27(7):1291-4.

PMID:17944397

Abstract

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.

摘要

合成了DL-高胱氨酸（DLH）与Na⁺、Cu²⁺、Zn²⁺和Ni²⁺的配合物，并通过元素分析检测这些配合物的组成。采用傅里叶变换红外光谱（FTIR）研究这些配位结构。结果表明，DLH的所有氨基、羧基和磺酸根基团可能与Na⁺、Cu²⁺、Zn²⁺和Ni²⁺有直接或间接相互作用。金属离子与羧基氧之间以及金属离子与氨基之间的键强顺序为Cu²⁺>Zn²⁺>Ni²⁺，从羧基不对称和对称伸缩振动的差异可知，羧基与不同离子在这些配合物中可能采取不同的配位模式。