Clicked Isoreticular Metal–Organic Frameworks and Their High Performance in the Selective Capture and Separation of Large Organic Molecules

Abstract

Three highly porous metal-organic frameworks (MOFs) with au niform rht-type topological network but hierarchical pores were successfully constructed by the assembly of triazole-containing dendritic hexacarboxylate ligands with Zn II ions.T hese transparent MOF crystals present gradually increasing pore sizes upon extension of the length of the organic backbone,a sc learly identified by structural analysis and gas-adsorption experiments.T he inherent accessibility of the pores to large molecules endows these materials with unique properties for the uptake of large guest molecules. The visible selective adsorption of dye molecules makes these MOFs highly promising porous materials for pore-sizedependent large-molecule capture and separation.

Multivariable Sieving and Hierarchical Recognition for Organic Toxics in Nonhomogeneous Channel of MOFs

“…Zhao et al and Li et al reported size-and/ or charge-selective capture of dyes by the use of MOFs with distinct pore sizes. 24,25 However, the corresponding experiments were performed in an organic solvent, which hampers the practical use of these MOFs in aqueous solution. Very recently, Ghosh and coworkers reported a base-resistant ionic MOF as an ion-exchange sorbent for dyes in water.…”

Rapid adsorption and selective capture of methylene blue by anionic In‐based MOF with carboxyl‐decorated pore surface

“…MOF materials exhibit unique advantages in the high adsorption capacity, effective selectivity and rapid adsorption rate of organic pollutants owing to high specific surface area, adjustable pore structure (size, shape and modified functional groups) and designable skeleton structure. [12][13][14][15][16][17] Based on previous research theories, ionic MOF materials can adsorb dyes with opposite charges to the pores/channels but dyes that possess same charges will be rejected through ion-exchange and electrostatic interactions. [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] Liu et al [26] reported an anionic framework material with functional imide groups can efficiently adsorb Basic Red 9 and Basic Violet 14 by electrostatic interaction and ion-exchange.…”

Silver Nanoparticle-Decorated Boron Nitride with Tunable Electronic Properties for Enhancement of Adsorption Performance

“…16−18 Among which, adsorption is selected as a much potential process because of the low cost, easy operation, outstanding designability, and high efficiency. 19−22 Up to now, different nanomaterials have been controlprepared as adsorbents in order to acquire desired adsorption performance, such as FeOOH, 23,24 MnO 2 , 25,26 WO 3 , 27,28 MOF, 29,30 thermoresponsive polymers 31−33 and so on. Each of the materials has inherent limitations, and their structures are unstable in an harsh environment.…”