A hydrolytically stable cage-based metal–organic framework containing two types of building blocks for the adsorption of iodine and dyes

Abstract

A metal–organic framework (SCNU-Z4) with high chemical stability in water and common organic solvents showed ability for iodine and dye adsorption.

A Ni(ii) metal–organic framework with helical channels for the capture of iodine via guest exchange induced amorphization

“…28–30 In general, the tetrazole group tends to form multi-nuclear secondary building units (SBUs), while the imidazole group further connects the SBUs to higher-dimensional frameworks. Herein, as part of a continuous study of MOFs based on heterotopic N-containing tripodal ligands, 28–33 a new imidazole-tetrazole heterotopic tripodal ligand with a larger central group, bis-(4-imidazol-1-yl-phenyl)-[4-(2 H -tetrazol-5-yl)-phenyl]-amine (HBITPA), was designed and applied to construct a MOF. The resulting Ni( ii )–MOF (SCNU-Z5) shows an interesting chiral structure with small channels running in three directions (including chiral helical channels in the c axis), which gives the framework pores available for iodine adsorption.…”

A bifunctional imidazolium-functionalized ionic porous organic polymer in water remediation

“…20 There are many techniques reported in the literature for eliminating these anionic pollutants and dyes, viz adsorption, [21][22][23] electro-and photo-catalysis, 24,25 chemical precipitation, 26,27 bioprocessing 24,28 etc. Among these techniques, adsorption [29][30][31][32] and photocatalysis [33][34][35] are considered the two most effective techniques due to their low cost and high feasibility, easy and safe operation, and green approach. Many emerging materials have been used so far for removing such pollutants, viz.…”

Calix[4]pyrrole‐based Crosslinked Polymer Networks for Highly Effective Iodine Adsorption from Water

“…[11] Capturing iodine with high adsorption capacity and fast kinetics from aqueous solutions remains am ajor challenge. Most materials used for this purpose,i ncluding MOFs, [12] silicon-carbon composites, [13] and aminosilanes, [14] are plagued by relatively low iodine adsorption capacities (< 1gg À1 )a nd slow uptake kinetics.P OPs and COFs offer ap otential approach to overcoming these limitations. [15] Forinstance,Ke et al reported photo-irradiated single-crystal-to-single-crystal (SCSC) transformations and covalent photo-cross-linking of molecular monomers to give COFs that were able to adsorb iodine rapidly from an aqueous source phase with ar elatively high uptake capacity of 2.1 gg À1 .…”