2017年8月18日 · We synthesized a two-dimensional (2D) crystalline covalent organic framework (sp 2 c-COF) that was designed to be fully π-conjugated and constructed from all sp 2 carbons by C=C condensation reactions of tetrakis (4-formylphenyl)pyrene and 1,4-phenylenediacetonitrile.

In the quest to expand the reticular chemistry and develop next-generation COFs with peculiar material properties, sp 2 carbon-conjugated COFs (sp 2 c-COFs) have garnered a surge of interest since their inception in 2016 due to the unparalleled features of continuous π-conjugation, high crystallinity, permanent porosity, unique optoelectronic pr...

2025年1月6日 · Here we report an imine-to-olefin transformation strategy to form single-crystal sp2 c-COFs. The isolated single crystals display rectangular nanotube-like domains with sizes up to approximately...

2017年8月22日 · 该研究小组通过引入Knoevenagel反应，在溶剂热条件下，按一定的拓扑网络结构成功合成了由碳碳双键连接的高结晶性的二维全共轭共价有机碳框架结构s p 2 c-COF（图1A）。

2018年10月8日 · In this work, we developed a C=C linkage for the construction of two-dimensional (2D) sp 2 carbon-conjugated frameworks (sp 2 c-COFs) that are designed to be π conjugated along both the x and y...

2021年6月1日 · sp 2 carbon covalent organic frameworks (COFs) are a unique class of crystalline 2D polymers of all sp 2 carbon atoms, which can be designed via topology diagrams and synthesized by polycondensation.

2023年5月2日 · sp 2 carbon-conjugated covalent organic framework (sp 2 c-COF) featured with high π-conjugation, high chemical stabilities, and designable chemical structures, are thus promising for applications including adsorption and separation, optoelectronic devices, and …

2023年10月11日 · The 2D sp 2 carbon-linked COF exhibits notable activity for photocatalytic overall water splitting, which can reach an apparent quantum efficiency of 2.53% at 420 nm. In contrast, the 2D imine-linked COF cannot catalyze the overall water-splitting reaction.

2021年9月17日 · A first example of an sp 2 carbon-conjugated three-dimensional (3D) covalent organic framework (COF) (BUCT-COF-4) is synthesized via the Knoevenagel condensation of the saddle-shaped aldehyde-substituted cyclooctatetrathiophene and 1,4-phenylenediacetonitrile.

2019年2月13日 · The synthesis of fully conjugated sp 2-carbon covalent organic frameworks (COF) is extremely challenging given the difficulty of the formation of very stable carbon-carbon double bonds (-C=C-). Here, we report the successful preparation of a 2D COF (TP-COF) based on triazine as central planar units bridged by sp 2 -carbon linkers through the -C ...