Ln−Co-Based Rock-Salt-Type Porous Coordination Polymers: Vapor Response Controlled by Changing the Lanthanide Ion

We synthesized new porous coordination polymers (PCPs) {LnIII[CoIII(dcbpy)3]·nH2O} (Ln = La3+, Nd3+, Gd3+; H2dcbpy = 4,4′-dicarboxy-2,2′-bipyridine) and characterized them by X-ray diffraction and vapor-adsorption measurements. These three Ln−Co-based PCPs have similar rock-salt types and highly symmetrical porous structure and show a reversible structural collapse−regeneration accompanied by water-vapor desorption−adsorption. Similar structural regeneration was also observed for the Gd−Co PCP upon exposure to MeOH and CH3CN vapors, whereas the remaining two PCPs barely responded to organic vapors.我们合成了新型多孔配位聚合物（porous coordination polymers，PCPs）{LnIII[CoIII(dcbpy)3]·nH2O}（其中Ln代表La³+、Nd³+、Gd³+；H2dcbpy为4,4′-二羧基-2,2′-联吡啶），并通过X射线衍射与蒸气吸附测试对其完成了表征。该三类基于Ln-Co的多孔配位聚合物均具有相似的岩盐型结构与高度对称的多孔骨架，且在水蒸气脱附-吸附过程中伴随可逆的结构坍塌-再生现象。当Gd-Co基多孔配位聚合物暴露于甲醇（MeOH）与乙腈（CH3CN）蒸气中时，同样观测到了类似的结构再生行为；而其余两种多孔配位聚合物则几乎不对有机蒸气产生响应。