3 years ago

Confining Functional Nanoparticles into Colloidal Imine-Based COF Spheres by a Sequential Encapsulation–Crystallization Method

Confining Functional Nanoparticles into Colloidal Imine-Based COF Spheres by a Sequential Encapsulation–Crystallization Method
Félix Zamora, Víctor Puntes, Vincent Guillerm, Amirali Yazdi, Javier Pérez-Carvajal, David Rodríguez-San-Miguel, Daniel Maspoch
Here, a two-step method is reported that enables imparting new functionalities to covalent organic frameworks (COFs) by nanoparticle confinement. The direct reaction between 1,3,5-tris(4-aminophenyl)benzene and 1,3,5-benzenetricarbaldehyde in the presence of a variety of metallic/metal-oxide nanoparticles resulted in embedding of the nanoparticles in amorphous and non-porous imine-linked polymer organic spheres (NP@a-1). Post-treatment reactions of NP@a-1 with acetic acid under reflux led to crystalline and porous imine-based COF-hybrid spheres (NP@c-1). Interestingly, Au@c-1 and Pd@c-1 were found to be catalytically active. Keeping nanoparticles in their place: A simple two-step method allows encapsulating several functional nanoparticles into porous and crystalline imine-based covalent organic framework (COF) spheres. The embedded nanoparticles are accessible to external species, thereby expanding the scope of these COF–nanoparticle hybrids to applications such as catalysis.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201702072

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