Straightforward construction of hollow polyoxometalate-based metal-organic framework via pseudo-homoepitaxial growth  

作　　者：Zhong Zhang Xujiao Ma Xu Han Hong Cui Ying Lu Shuxia Liu Yiwei Liu 

机构地区：[1]Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education,College of Chemistry,Northeast Normal University,Changchun 130024,China [2]Zhang Dayu School of Chemistry,Dalian University of Technology,Dalian 116024,China

出　　处：《Science China Chemistry》2022年第10期1921-1928,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (22172022,21872021,22071019,22171035,21901135)

摘　　要：Hollow structures are significant for shortening diffusion path and promoting active center exposure.Single-crystalline hollow polyoxometalate-based metal-organic frameworks(POM@MOFs)with increased adsorption performance and catalytic activity were synthesized through a straightforward pseudo-homoepitaxial growth strategy within only 1.5 min.The strategy ingeniously exploits favorable characteristics of well-matched lattice/structure but acid stability difference between MOF and POM@MOF to construct a pseudo-homoepitaxial structure.Specifically,the MOF single crystals are used as seeds to perform epitaxial growth of the lattice/structure-matched POM@MOF under appropriate conditions.Interestingly,the MOF seeds collapse spontaneously during epitaxial growth,affording regular hollow POM@MOF single crystals.Because the acid stability of the POM@MOF is much higher than that of the MOF,it is speculated that the hollow structure formation may be related to the acid released from the epitaxial POM@MOF growth.And the pseudo-homoepitaxial POM@MOF growth strategy based on structural matching but stability difference avoids additional template removal process in conventional hollow MOF preparation and ensures hollow single crystal construction.

关 键 词：polyoxometalate-based metal-organic framework pseudo-homoepitaxial growth hollow structure single crystals etching 

分 类 号：O641.4[理学—物理化学]