Munoz-Noval Alvaro, Fukami Kazuhiro, Kuruma Takuya, Hayakawa Shinjiro
Department of Materials Physics, Faculty of Physics, University Complutense of Madrid, 28040, Madrid, Spain.
Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Hiroshima, 739-8527, Japan.
Anal Sci. 2024 Jun;40(6):1193-1201. doi: 10.1007/s44211-024-00549-z. Epub 2024 Apr 5.
In this work, the structure of Zn acetate has been determined by a combination of X-ray absorption fine structure and Raman spectroscopy. We have analyzed the local atomic environment and the main vibrational bands of the acetate and Zn acetate at different pH. The results suggest that Zn acetate complex acquires a bidentate structure that modifies its first coordination shell. Meanwhile, the coordination shell of the hydrated Zn cation is formed by 6 hydroxides at a mean distance of 2.06 Å, the coordination shell of the Zn cation in the complex is formed by 2 hydroxides and 2 oxygens from the carboxyl group of the acetate, at a mean Zn-O distance of 1.96 Å. The structure of the Zn acetate complex is compared to those of Zn malonate and Zn citrate, none of which present a reduction in the coordination shell neither a shrinkage of the Zn-O shell distance.
在这项工作中，通过结合X射线吸收精细结构和拉曼光谱确定了醋酸锌的结构。我们分析了不同pH值下醋酸根和醋酸锌的局部原子环境以及主要振动带。结果表明，醋酸锌络合物获得了一种双齿结构，该结构改变了其第一配位层。同时，水合锌阳离子的配位层由6个氢氧化物形成，平均距离为2.06 Å，络合物中锌阳离子的配位层由2个氢氧化物和来自醋酸根羧基的2个氧形成，锌-氧平均距离为1.96 Å。将醋酸锌络合物的结构与丙二酸锌和柠檬酸锌的结构进行了比较，它们均未出现配位层减少或锌-氧壳层距离缩小的情况。
