Chiral supramolecular 2D halogen-bonded organic frameworks constructed by post-synthetic modified cross-linking strategy  

作　　者：Ning Xia Jiahao Zhao Guanfei Gong Hongqiang Dong Haohu Li Jike Wang Lu Wang Shigui Chen 

机构地区：[1]The Institute for Advanced Studies,Wuhan University,Wuhan 430072,China [2]School of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China

出　　处：《Science China Chemistry》2023年第11期3169-3177,共9页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(22371218,21702153,21801194);the Wuhan Science and Technology Bureau(whkxjsj009);the support of the Core Facility of Wuhan University;the Large-scale Instrument and Equipment Sharing Foundation of Wuhan University。

摘　　要：The development of preparation methods for XOFs,as a new class of organic frameworks,plays a crucial role in shaping their structures,functions,and potential applications.In this study,we presented the construction of chiral supramolecular 2D halogen-bonded organic frameworks(XOFs)through a post-synthetic modification strategy.A linear halogen-bonded organic polymer(XOP),XOP-DPBA,decorated with aldehyde groups,was initially prepared to validate the feasibility of post-synthetic modification for XOF construction and functionalization.XOP-DPBA exhibited excellent reactivity with amines,forming imine bonds.By utilizing this reactivity,a series of cross-linked 2D XOFs were efficiently prepared through post-synthetic modified cross-linking reactions.Furthermore,we successfully introduced chiralα/β-cyclodextrins(α/β-CD)into the XOF skeletons via host-guest interactions,resulting in the fabrication of chiral supramolecular 2D XOFs.These chiral XOFs displayed the induced circular dichroism(ICD)signals and assembled them into helical fibers.The post-synthetic modification strategy demonstrated its versatility and simplicity for the construction and functionalization of XOFs.

关 键 词：supramolecular halogen-bonded organic frameworks [N···I~+···N]halogen bond post-synthetic modification supramolecular self-assembly chirality induction 

分 类 号：TB34[一般工业技术—材料科学与工程]