A superstable 3p-block metal-organic framework platform towards prominent CO2 and C1/C2-hydrocarbon uptake and separation performance and strong Lewis acid catalysis for CO2 fixation

摘要

The design and synthesis of highly stable metal-organic framework (MOF) materials are urgently needed but are still challenging. Demonstrated herein is a superstable 3p-block metal-organic framework platform (3p-MOFs, SNNU-5-Al, Ga and In) inspired by the periodic law of elements. Apart from extra-high thermal stability (up to 500 degrees C), SNNU-5-Al shows excellent water tolerance (24 days at RT and 1 day at 80 degrees C in pure water) and prominent pH stability (4 to 12). Superlarge cuboctahedral and octahedral cages in SNNU-5s lead to excellent CO2 and C1/C2-hydrocarbon uptake and separation performance as well as excellent methane storage capacity under 65 bar pressure (345 cm(3) g(-1) at 273 K and 279 cm(3) g(-1) at 298 K for SNNU-5-Al). The strong Lewis acid nature of open 3p metal sites further makes SNNU-5 MOFs ideal heterogeneous catalysts for CO2 catalytic fixation with epoxides. Overall, this work provided a significant advance in the development of robust functional MOF materials for energy and environmental applications.