A Cationic Antimonite Chain Templated by Sulfate: [Sb6O74+][(SO42–)2]

An extended metal oxide possessing a cationic charge on the host has been synthesized by hydrothermal methods. The structure consists of 1D antimony oxide [Sb6O7]4+ chains with a new structural motif of four Sb atoms wide and unprotonated sulfate anions between the chains. The material was characterized by powder and single-crystal X-ray diffraction. Thermal behavior and chemical resistance in aqueous acidic conditions (pH ∼2) indicate a highly stable cationic material. The stability is attributed to the entirely inorganic composition of the structure, where 1D covalently extended chains are electrostatically bound to divalent anions.本研究通过水热法合成了一种主体带有阳离子电荷的无限延伸型金属氧化物。该材料的结构包含一维氧化锑[Sb6O7]⁴⁺链，其具有宽为四个锑原子的新型结构基元，且链间存在未质子化的硫酸根阴离子。本研究采用粉末X射线衍射（powder X-ray diffraction）与单晶X射线衍射（single-crystal X-ray diffraction）对该材料进行了结构表征。在pH≈2的酸性水溶液中开展的热行为与耐化学性测试结果表明，该阳离子材料具备极高的稳定性。该稳定性可归因于该材料结构完全由无机组分构成：一维共价延伸链与二价阴离子通过静电作用结合。