Installing a molecular truss beam stabilizes MOF structures

查看全文 作　　者：Hong Ki [1,2]Kim;Jong-Yeong [1]Jung;Gyumin [1,2]Kang;Mu-Hyun [1,2]Baik;Eun-Young [1,3]Choi 机构地区：[1]Department of Chemistry,Korea Advanced Institute of Science and Technology(KAIST),Daejeon,34141,Republic of Korea;[2]Center for Catalytic Hydrocarbon Functionalizations,Institute for Basic Science(IBS),Daejeon,34141,Republic of Korea;[3]Korea Science Academy of KAIST,105-47 Baegyanggwanmun-ro,Busanjin-gu,Busan,47162,Republic of Korea 出　　处：《npj Computational Materials》索引2022年第1期,共9页 基　　金：This work was supported by the Korea Science Academy of KAIST with funds from the Ministry of Science and ICT and the Institute for Basic Science (IBS-R010-A1) in Korea. 摘　　要：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 stableπ–πinteraction 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℃for~5 days.The unmodified MOF-5 shows clear signs of structural collapse after~1 h. 关 键 词：BEAM MOIETY DURABILITY