4,6-Connected <b>fsb</b> Topology Networks Obtained through Two-Step Crystal Engineering of Decorated Trigonal Prismatic Nodes

A two-step crystal engineering strategy has been utilized to synthesize a new and versatile class of metal–organic materials, the first to exhibit 4,6-connected fsb topology. The new fsb networks are constructed from simple and inexpensive nodes (4-connected Zn­(CO2)­(py)2 tetrahedra; 6-connected Cr­(μ3-O)­(RCO2)6 trigonal prisms) and linker ligands (isonicotinate and various dicarboxylates). Further, since interpenetration is precluded, they can exhibit extra-large void volumes. These fsb nets are prototypal for what should ultimately become a large family of related structures given the ready availability of functionalized and/or expanded variants of both linker ligands. The fsb nets described herein therefore represent platforms or blueprints for a new family of ultrahigh surface area porous materials.本研究采用两步晶体工程（crystal engineering）策略，合成了一类新型多功能金属有机材料（metal–organic materials），该类材料为首例呈现4,6-连接fsb拓扑结构的体系。该新型fsb网络由结构简单且成本低廉的金属节点与连接配体构筑而成：其中金属节点包括4连接的Zn(CO₂)(py)₂四面体结构，以及6连接的Cr(μ₃-O)(RCO₂)₆三角棱柱结构；连接配体则涵盖异烟酸酯与多种二羧酸盐。此外，由于该类网络可避免互穿（interpenetration）现象，因此能够拥有超大孔隙体积。此类fsb网络可作为相关结构家族的原型：鉴于两类连接配体的功能化及/或拓展变体均易于获取，该家族最终有望发展为庞大的结构体系。因此，本文所报道的fsb网络，可作为一类新型超高比表面积多孔材料家族的构筑平台与设计蓝图。