By employing a tripod rigid ligand with six coordination sites, 4,4’,4”-(pyridine-2,4,6-triyl)tribenzoic acid (H₆PTA), a microporous terbium(III)-organic framework, [(Me)₂NH₂]_1.5[Tb_1.5(PTA)]·9H₂O (1) has been synthesized under the solvothermal condition. Structural analysis demonstrates that 1 is a 3D anionic framework based on two kinds of Tb(III) units, which presents a rare framework constructed from ternary secondary building units (SBUs) and shows a new (4,5,6)-connected topology. Gas adsorption measurements reveal that 1 exhibits the significant C₂H₂ and C₂H₄ adsorption capacity but negligible uptake of CH₄, which makes 1 as a promising adsorbent for C₂H₂/CH₄ and C₂H₄/CH₄ separation.

通过使用具有六个配位点的三脚架刚性配体4,4'，4”-（吡啶-2,4,6-三基）三苯甲酸（H ₆ PTA），微孔a（III）-有机骨架，[[ Me）₂ NH ₂ ] _1.5 [Tb _1.5（PTA）]·9H ₂ O（1）在溶剂热条件下合成。结构分析表明1是一个基于两种Tb（III）单元的3D阴离子骨架，它代表了一种由三元二级建筑单元（SBU）构造的稀有骨架，并显示了一种新的（4,5,6）连接拓扑。气体吸附测量结果表明1具有明显的C ₂ H ₂C ₂ H _4的吸附能力，但对CH _4的吸收可忽略不计，这使1成为用于C ₂ H ₂ / CH ₄和C ₂ H ₄ / CH ₄分离的有希望的吸附剂。