固态锰（II）、钴（II）和镍（II）透明质酸盐中的金属离子环境。

Metal-ion environment in solid Mn(II), Co(II) and Ni(II) hyaluronates.

作者信息

Tratar Pirc Elizabeta, Arcon Iztok, Kodre Alojz, Bukovec Peter

机构信息

Faculty of Chemistry and Chemical Technology, Askerceva 5, SI-1000 Ljubljana, Slovenia.

出版信息

Carbohydr Res. 2004 Oct 20;339(15):2549-54. doi: 10.1016/j.carres.2004.07.025.

DOI:10.1016/j.carres.2004.07.025

PMID:15476716

Abstract

Amorphous powders and films of some metal hyaluronate complexes of general composition (C14H20O11N)2 x xH2O (M = Mn2+, Ni2+ and Co2+) have been prepared at pH 5.5-6.0. The coordination geometry around the metal ions has been analyzed by EXAFS (extended X-ray absorption fine structure) and FTIR spectroscopy. Mn2+, Ni2+, and Co2+ ions are coordinated to carboxylate oxygen atoms and water molecules. The process of local geometry formation round the metal ions is sensitive to sample preparation.

摘要

已在pH 5.5 - 6.0条件下制备了通式为(C14H20O11N)2·xH2O（M = Mn2+、Ni2+和Co2+）的一些金属透明质酸配合物的无定形粉末和薄膜。通过扩展X射线吸收精细结构（EXAFS）和傅里叶变换红外光谱（FTIR）对金属离子周围的配位几何结构进行了分析。Mn2+、Ni2+和Co2+离子与羧酸根氧原子和水分子配位。金属离子周围局部几何结构的形成过程对样品制备很敏感。