Cyclodextrin nanofilms with hydrophobic and hydrophilic channels for solvent permeation and molecular sieving  

作　　者：Kai Zhang Yu Dai Yongli Shi Zhaoxin Zhang Linji Li Xiaojin Zhang Fan Xia 

机构地区：[1]Faculty of Materials Science and Chemistry,China University of Geosciences,Wuhan 430074,China [2]Henan Academy of Geology,Zhengzhou 450052,China

出　　处：《Nano Research》2024年第7期6638-6644,共7页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22090050);National Key Research and Development Program of China(No.2021YFA1200403);Joint NSFC-ISF Research Grant Program(No.22161142020);Natural Science Foundation of Hubei Province(No.2020CFA037);Zhejiang Provincial Natural Science Foundation of China(No.LD21B050001);Key Research and Development and Promotion Projects in Henan Province(Nos.212102310081 and 232102320125).

摘　　要：Nanofilms that can fast permeate solvents and accurately sieve molecules are of significant importance for separation.A promising strategy is to align the inner cavities of macrocycles into the channels within nanofilms,and control the channel size by selecting the macrocycles.However,the channels outside the macrocycles are ignored.Here,we prepare nanofilms with hydrophobic channels(cyclodextrin inner cavity)and hydrophilic channels(cyclodextrin outer space)through interfacial polymerization of azobenzene-4,4’-dicarbonyl dichloride and amino-functionalizedβ-cyclodextrin.By utilizing the significant geometric changes caused by the photoisomerization of azobenzene,nanofilms with adjustable hydrophilic channel sizes were obtained.Our nanofilms have high permeability to polar and non-polar solvents,and can distinguish molecules with almost the same molecular weight but different shapes.This work expands the development of next-generation nanofilms generated through interfacial polymerization by incorporating rational molecular design.

关 键 词：NANOFILM β-cyclodextrin AZOBENZENE interfacial polymerization solvent permeation molecular sieving 

分 类 号：O62[理学—有机化学]