Two 2D wavy hexagonal hexahydroxyl cyclotricatechylene (CTC) based COFs, CTC-COF-2 and CTC-COF-3 were synthesized through solvothermal reaction. The bowl-shaped conformation caused CTC skeletons packed in a columnar manner with the same oriented units, thus forming an undulated structure. The gas adsorption properties of CTC-COFs were investigated, which show the potential application abilities in hydrogen storage of CTC-COFs. The introduction of pyrene into CTC-COF-3 makes it a potential semiconducting π-conjugated material.
A series of amino substituted cyclotrianisylene (aCTV)-based covalent organic frameworks (COFs), aCTV-COF1 to aCTV-COF4, have been synthesized. These crystalline analogues showed permanent porosity with BET surface areas from 656 m 2 g −1 to 1428 m 2 g −1 . With the introduction of methoxy groups and hydroxyl groups at the phenyl linker moieties in aCTV-COF3 and aCTV-COF4, their properties (such as color, gas adsorption, hydrolytic stability and so on) have been influenced to a great extent. The CO 2 sorption of aCTV-COF4 has increased significantly, and the H 2 uptake of aCTV-COF3 is obviously higher than those of aCTV-COF1 and aCTV-COF2. Moreover, the introduction of the methoxy and hydroxyl groups has made aCTV-COF3 and aCTV-COF4 have better hydrolytic stability.
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