title: Imparting Catalytic Activity to a Covalent Organic Framework Material by Nanoparticle Encapsulation.
abstract: Integrating covalent organic frameworks (COFs) with other functional materials is a useful route to enhancing their performances and extending their applications. We report herein a simple encapsulation method for incorporating catalytically active Au nanoparticles with different sizes, shapes, and contents in a two-dimensional (2D) COF material constructed by condensing 1,3,5-tris(4-aminophenyl)benzene (TAPB) with 2,5-dimethoxyterephthaldehyde (DMTP). The encapsulation is assisted by the surface functionalization of Au nanoparticles with polyvinylpyrrolidone (PVP) and follows a mechanism based on the adsorption of nanoparticles onto surfaces of the initially formed polymeric precursor of COF. The incorporation of nanoparticles does not alter obviously the crystallinity, thermal stability, and pore structures of the framework matrices. The obtained COF composites with embedded but accessible Au nanoparticles possess large surface areas and highly open mesopores and display recyclable catalytic performance for reduction of 4-nitrophenol, which cannot be catalyzed by the pure COF material, with activities relevant to contents and geometric structures of the incorporated nanoparticles.
authors.affiliation: Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University , Suzhou 215123, China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Shi
authors.affiliation: Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University , Suzhou 215123, China.
authors.forename: Youjin
authors.initials: Y
authors.lastname: Yao
authors.affiliation: Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University , Suzhou 215123, China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, China.
authors.forename: Kun
authors.identifier: http://orcid.org/0000-0003-2940-9814
authors.initials: K
authors.lastname: Liu
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, Faculty of Chemistry, Northeast Normal University , Changchun 130024, China.
authors.forename: Guangshan
authors.initials: G
authors.lastname: Zhu
authors.affiliation: Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University , Suzhou 215123, China.
authors.forename: Lifeng
authors.initials: L
authors.lastname: Chi
authors.affiliation: Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University , Suzhou 215123, China.
authors.forename: Guang
authors.identifier: http://orcid.org/0000-0001-8392-2980
authors.initials: G
authors.lastname: Lu
keywords: catalysis; composites; covalent organic framework; nanoparticles; porous materials