Conjugated Polymer Framework via Interfacial Knoevenagel Condensation: Covalent Self-Assembly from 0D Particle to 2D Film
발표자
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초록
내용
Covalent organic frameworks (COFs) which are a class of crystalline porous polymers have been developed due to their multi-chemical functionality. Unlike traditional polymers, COFs are capable of precisely organizing molecular species into networks featuring structural periodicity and inherent porosity. However, although sp2 carbon-linked COFs can be very stable, very few examples have been reported until now. It could be explained by the low reversibility of the formation of C=C bonds and it has been proven to be a big challenge. In this work, we synthesized a novel COF via Knoevenagel condensation and it was the first time to make sp2-carbon linked COF via interfacial polymerization. COF was characterized by FT-IR and solid-state 13C NMR and SEM images revealed that COF particles were self-assembled and connected each other. As a result, crystalline film was formed depending on the time and it has high thermal stability. PXRD also exhibited that it has crystallinity.