共价键
化学
共价有机骨架
热稳定性
网络共价键合
多孔性
动态共价化学
化学工程
结晶学
高分子化学
晶体结构
有机化学
超分子化学
工程类
作者
Joseph R. Hunt,Christian J. Doonan,James D. LeVangie,Adrien P. Côté,Omar M. Yaghi
摘要
This paper reports the synthesis and characterization of a new crystalline 3D covalent organic framework, COF-202: [C(C6H4)4]3[B3O6 (tBuSi)2]4, formed from condensation of a divergent boronic acid, tetra(4-dihydroxyborylphenyl)methane, and tert-butylsilane triol, tBuSi(OH)3. This framework is constructed through strong covalent bonds (Si−O, B−O) that link triangular and tetrahedral building units to form a structure based on the carbon nitride topology. COF-202 demonstrates high thermal stability, low density, and high porosity with a surface area of 2690 m2 g−1. The design and synthesis of COF-202 expand the type of linkage that could be used to crystallize new materials with extended covalent organic frameworks.
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