Supramolecular Templating Approach for the Solvent-Free Synthesis of Open-Framework Metal Oxalates

A series of open-framework metal oxalates (metal = Zn, Co, Mn, Bi, In) were prepared under solvent-free conditions by a supramolecular templating approach. These compounds have cationic, anionic, and neutral frameworks with pore apertures ranging from small 8-membered rings (8 MRs) to extra-large 16 and 20 MRs. The zinc oxalate exhibits a proton conductivity of 2.6 × 10–3 S cm–1 at 60 °C under 98% relative humidity.本研究通过超分子模板法，在无溶剂条件下合成了一系列金属组分为Zn、Co、Mn、Bi、In的开放骨架金属草酸盐。该系列化合物包含阳离子型、阴离子型与中性骨架，其孔道孔径范围从小型8元环（8 MR）延伸至超大尺寸的16元环及20元环。其中锌草酸盐在60 ℃、相对湿度98%的条件下，质子电导率可达2.6 × 10⁻³ S·cm⁻¹。