Transformation of a Cluster-Based Metal–Organic Framework to a Rod Metal–Organic Framework

A highly stable and rigid rod metal–organic framework (MOF) is obtained by the single-crystal-to-single-crystal transformation of a Zr6 cluster-based MOF with highly interconnected but geometrically mismatched building blocks. The transformation results in a significant framework contraction, which comes from the formation of infinite chains of carboxylate- and aquo-linked Zr6 clusters as a one-dimensional rod secondary building unit. The permanently microporous rod MOF is stable in a variety of solvents, including H2O, and even under very harsh conditions, such as strongly acidic and basic aqueous solutions at 100 °C.通过对具有高度互连但几何失配构建基元的Zr6簇基金属有机框架（metal–organic framework, MOF）实施单晶到单晶转变，可得到一种高稳定性、高刚性的棒状金属有机框架。该转变过程引发框架发生显著收缩，其根源在于形成了以羧酸盐与水配体桥联Zr6簇构成的无限链，作为一维棒状次级结构单元。这种永久性微孔棒状MOF可在包括水在内的多种溶剂中保持稳定，甚至可在100℃的强酸性、强碱性水溶液这类严苛条件下稳定存在。