Mixed Short and Long Ligands toward the Construction of Metal–Organic Frameworks with Large Pore Openings

Abstract

Short azole and long tris­(4-(1H-imidazol-1-yl)­phenyl)­amine (Tipa) ligands are incorporated into the syntheses of metal–organic frameworks (MOFs) for the first time. Owing to the discovery of a binary solvothermal reaction system, a short–long azole mixing strategy is realized. By this strategy, a cationic MOF possessing a large pore opening (maximum size 13.1 Å) is obtained with permanent porosity and ion-exchange property. Also, another cationic one with a rare sandwich layer can be obtained when using tetrazole instead of imidazole under a similar reaction condition. The slight difference between imidazole and tetrazole is amplified by Zn-Tipa into disparate frameworks.

Construction of Janus-structured ZnO@ZIF-8(-NH2)/cellulose nanofiber foam for highly efficient adsorption and photocatalysis-assisted desorption of tetracycline

“…Interestingly, C-ZnO 0.5 /ZAA foam displayed a much higher mesopore volume (0.25 m 3 g −1 ) compared to C-ZnO 0.5 /ZAA foam, which is ascribed to the crystal defects formed by the amino ligand addition. 53 Moreover, their corresponding pore size distribution is shown in the inset of Fig. 2d.…”

Precisely Tuning the Coordination Modes of the 2-Methyl-1H-imidazole-4,5-dicarboxylic Acid Ligand, Affording a Series of Metal–Organic Compounds with Diverse Structures and Properties

“…However, MOFs with high CO 2 adsorption amounts usually have low selectivity for CO 2 adsorption. Therefore, methods to increase the selectivity of MOFs for CO 2 need to be developed. − …”