Tuning the release rate of volatile molecules by pore surface engineering in metal-organic frameworks  

作　　者：Hongwen Chen Huaqiang Chen Bo Zhang Liming Jiang Youqing Shen Engang Fu Dan Zhao Zhuxian Zhou 

机构地区：[1]Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Center for Bionanoengineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,China [2]State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China [3]Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027,China [4]Department of Chemical&Biomolecular Engineering,National University of Singapore,Singapore 117585,Singapore

出　　处：《Chinese Chemical Letters》2021年第6期1988-1992,共5页中国化学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2016YFA0200301);the National Natural Science Foundation of China(Nos.21875211 and 51603181)。

摘　　要：Encapsulation and controlled release of volatile molecules such as fragrances in a designed manner is important but challenging for the flavor and fragrance industry.Here,we report the tuning release of volatile molecules by postsynthetic modification of an amine-terminated metal-organic framework(MOF)MIL-101-NH_(2).By amidation,we obtained three MIL-101 MOFs,the trimethylacetamideterminated TC-MIL-101,the benzamide-terminated BC-MIL-101,and the oxalic acid monoamideterminated OC-MIL-101.All the MOFs can efficiently encapsulate volatile molecules.Moreover,we demonstrate that the release profile of volatiles can be widely tuned to sustain the release in several days to months and even over a year using different modified MIL-101 MOFs.We show that the release profiles are correlated with the binding energies between the guest volatiles and pores in MOFs.The pore diffusion and the synergistic transport are the rate-limiting step of the guest molecules from the modified MOFs.

关 键 词：Metal-organic frameworks(MOFs) Postsynthetic modification Encapsulation and sustained-release FRAGRANCES Host-guest interaction 

分 类 号：TQ65[化学工程—精细化工] O641.3[理学—物理化学]