A strategy for the synthesis of covalent organic frameworks with open docking sites is developed. The docking sites are ordered on the channel walls and structurally predesignable for meeting various types of noncovalent interactions, thus opening a way towards designing supramolecular materials based on crystalline porousorganic frameworks.
New Synthetic Path to 2,2‘-Bipyridine-5,5‘-dicarbaldehyde and Its Use in the [3+3] Cyclocondensation with <i>trans</i>-1,2-Diaminocyclohexane
作者:Jana Hodačová、Miloš Buděšínský
DOI:10.1021/ol702612t
日期:2007.12.1
groups with sodium periodate. On condensation of this dialdehyde with enantiomerically pure trans-1,2-diaminocyclohexane, the macrocyclic [3+3] hexa Schiff base has been obtained in excellent yield. Its reduction has given large macrocyclic hexaamine having three bipyridine units incorporated into the macrocycle structure.
Covalent Organic Frameworks toward Diverse Photocatalytic Aerobic Oxidations
作者:Shuyang Liu、Miao Tian、Xiubin Bu、Hua Tian、Xiaobo Yang
DOI:10.1002/chem.202100398
日期:2021.5.17
two‐dimensional covalentorganicframeworks (2D‐COFs) have become promising heterogenous photocatalysts in visible‐light‐drivenorganic transformations. Herein, a visible‐light‐driven selective aerobic oxidation of various small organic molecules by using 2D‐COFs as the photocatalyst was developed. In this protocol, due to the remarkable photocatalytic capability of hydrazone‐based 2D‐COF‐1 on molecular
Designed Synthesis of Porphyrin-based Two-dimensional Covalent Organic Frameworks with Highly Ordered Structures
作者:Xiong Chen、Jia Gao、Donglin Jiang
DOI:10.1246/cl.150496
日期:2015.9.5
Porphyrins are representative functional π-systems; synthesizing their highly ordered structures is an established goal in chemistry. Here, we report the designed synthesis of a series of porphyrin-based covalent organic frameworks with highly ordered structures through polycondensation. The porphyrin-based frameworks exhibited high crystallinity, high porosity, and extended π-conjugation over the polyporphyrin sheets.