The First Uranyl Arsonates Featuring Heterometallic Cation–Cation Interactions with UVIO–ZnII Bonding

Two new uranyl arsonates, Zn­(UO2)­(PhAsO3)2L·H2O [L = 1,10-phenanthroline (1) and 2,2′-bipyridine (2)], have been synthesized by hydrothermal reactions of phenylarsonic acid, L, and ZnUO2(OAc)4·7H2O. Single-crystal X-ray analyses demonstrate that these two compounds are isostructural and exhibit one-dimensional chains in which UVI and ZnII cations are directly connected by the yl oxygen atoms and additionally bridged by arsonate groups. Both compounds represent the first examples of uranyl arsonates with heterometallic cation–cation interactions.

本研究以苯胂酸（phenylarsonic acid）、配体L与ZnUO2(OAc)4·7H2O为原料，通过水热反应成功合成了两种新型铀酰胂酸盐（uranyl arsonates）：Zn(UO2)(PhAsO3)2L·H2O，其中L分别为1,10-邻菲啰啉（1,10-phenanthroline，记为化合物1）与2,2'-联吡啶（2,2′-bipyridine，记为化合物2）。单晶X射线衍射分析结果显示，这两种化合物为同构体，均具有一维链状结构：六价铀（UVI）与二价锌（ZnII）阳离子通过铀酰氧原子直接相连，同时被胂酸根基团桥联。上述两种化合物均为首例具有异金属阳离子-阳离子相互作用的铀酰胂酸盐体系。