2D-Covalent Organic Frameworks with Interlayer Hydrogen Bonding Oriented through Designed Nonplanarity
作者:Sampath B. Alahakoon、Kui Tan、Haardik Pandey、Shashini D. Diwakara、Gregory T. McCandless、Daniel I. Grinffiel、Alejandra Durand-Silva、Timo Thonhauser、Ronald A. Smaldone
DOI:10.1021/jacs.0c03409
日期:2020.7.29
We report the synthesis and characterization of a new class of 2D-covalent organic frameworks, called COFamides, whose layers are held together by amide hydrogen bonds. To accomplish this, we have designed monomers with a non-planar structure that arises from steric crowding, forcing the amide side groups out of plane with the COF sheets orienting the hydrogen bonds between the layers. The presence
我们报告了一类新的二维共价有机框架的合成和表征,称为 COFamides,其层由酰胺氢键结合在一起。为了实现这一点,我们设计了具有非平面结构的单体,这种结构源于空间拥挤,迫使酰胺侧基离开平面,COF 片使层间的氢键定向。与缺乏氢键能力的控制结构相比,这些氢键的存在提供了显着的结构稳定性,从而导致较低的表面积和结晶度。我们已经对这些 COF 的吖嗪和亚胺连接版本进行了表征,分别命名为 COFamide-1 和 -2,分别用于它们的表面积、孔径和结晶度。除了这些更传统的表征方法,