Enhancing the stability and durability of metal-organic frameworks (MOFs) is vital for practical applications because many promising MOF materials suffer from phase transitions and/or structural decompositions with humidity being a particularly damaging condition. In mechanical engineering, the frame of buildings and furniture can be stabilized significantly by installing a truss beam. Employing the same principle, we functionalized the organic component of MOF-5 to contain a carbazole moiety that can act as a molecular truss beam by reaching across the corner and forming a stable π–π interaction with a phenyl group on the edge position of the MOF-skeleton. This structural support enhanced the stability of the MOF substantially, allowing the designed MOF to maintain compositional integrity under steam conditions at 90 °C for ~5 days. The unmodified MOF-5 shows clear signs of structural collapse after ~1 h.

提高金属有机框架 (MOF) 的稳定性和耐用性对于实际应用至关重要，因为许多有前途的 MOF 材料会遭受相变和/或结构分解，而湿度是特别有害的条件。在机械工程中，通过安装桁架梁可以显着稳定建筑物和家具的框架。使用相同的原理，我们将 MOF-5 的有机成分功能化，使其含有咔唑部分，该部分可以通过穿过角落并与边缘位置上的苯基形成稳定的 π-π 相互作用而充当分子桁架梁。 MOF-骨架。这种结构支撑大大增强了 MOF 的稳定性，使设计的 MOF 在 90°C 的蒸汽条件下保持成分完整性约 5 天。