2018年12月29日 · 共价有机框架（covalent organic framework, COF）是化学研究中迅速发展的一个新领域。 在二维和三维中以各种共价键连接原子从而构建框架结构，使COF化学超越了结构而转向了方法学，这也赋予这类新材料广阔的应用前景。 尽管COF中结构与性能的关系已经研究较多，而且也发现了COF不少引人瞩目的性质，但是其工业化应用之路上也存在一些重要挑战，比如化学稳定性、可加工性和规模化合成等等。 近日，来自印度科学教育研究所（IISER）的 Rahul …

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.

2022年11月4日 · 在这种情况下，具有正方形平面几何形状和不同功能的卟啉部分已被广泛用作各种mof和cof的4-连接构建模块。与mof中丰富的基于卟啉的4-连接拓扑相比,cof中基于卟啉的网络主要限于[4 + 2]、[4 + 3]、[4 + 4]和[4+6]。

2020年1月22日 · Covalent organic frameworks (COFs) are a class of crystalline porous organic polymers with permanent porosity and highly ordered structures. Unlike other polymers, a significant feature of COFs is that they are structurally predesignable, synthetically controllable, and functionally manageable.

2023年5月19日 · Herein, we report two highly crystalline 3D COFs with pto and mhq-z topologies designed by rationally selecting rectangular-planar and trigonal-planar building blocks with appropriate...

2021年6月1日 · Covalent organic frameworks (COFs) are the emerging type of organic crystalline porous materials, prepared through reticular chemistry with building blocks featuring light elements (such as C, H, O, N, or B atoms), and connected through the covalent bond and extended into two or three dimensions.

The ionic hydrogen-bonded organic framework (HOF), COF-4 (Fig. 3 a), integrates tetra-(4-carboxyphenyl) porphyrin within the backbone together with a commercial biocide, quaternary ammonium, as the counterion. The stable channels along with the electrostatic interactions between the framework and counterions facilitate biocide release, that is ...

2020年4月2日 · By reticulating the tetraphenylethylene (TPE)-based and triazine-based moieties into COF frameworks, novel electron donor-acceptor (D-A) type structures were obtained. These TTCOFs have good photocatalytic activity in aerobic C(sp3)-H bond functionalization and arylboronic acid oxidation driven by visible light, with yields up to 94%.

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2024年6月4日 · PI-COF-4和PI-COF-5是两种特定的聚酰亚胺共价有机框架（PI-COF）材料。 以下是关于这两种材料的详细解释： 1. 合成条件. 温度：PI-COF-4的合成可能需要较高的温度，具体温度可能高达160 ℃。 时间：反应时间可能从1天至9天不等，但为了得到较好的产率和性能，大多数共价有机框架材料至少需要3天的反应时间。 2. 结构和性质. 由于是PI-COF的一种，PI-COF-4可能结合了聚酰亚胺（PI）和共价有机框架（COF）的物理性质，如高温稳定性、机械性能和孔隙 …