Bifunctional Metal–Organic Framework Functionalized by Dimethylamine Cations: Proton Conduction and Iodine Vapor Adsorption

Abstract

A metal−organic framework, {Zn 3 (BTB) 2 (μ 3 -OH)[(CH 3 ) 2 NH 2 ](H 2 O)} n (1), was synthesized based on H 3 BTB (1,3,5-tri(4-carboxyphenyl)benzene). An AC impedance test proves that 1 has a relatively high conductivity performance of 1.52 × 10 −3 S•cm −1 at 338 K and 98% RH. The proton conductivity of the composite film 1@CS-9 (CS = chitosan) reaches 1.84 × 10 −1 S• cm −1 at 328 K and 98% RH. In addition, 1 is discovered to have a good adsorption effect on iodine vapor, and the adsorption capacity reaches 726 mg•g −1 . The multifunctionality caused by dimethylamine cations was investigated for the first time, which has implications for multifunctionality generated by host−guest molecules.

Analysis of Radioactive Iodine Trapping Mechanism by Zinc-Based Metal–Organic Frameworks with Various N-Containing Carboxylate Ligands

“…As illustrated in Figure a, Zn-MOF-1, and Zn-MOF-2 demonstrated notable iodine adsorption capacities, with maximum adsorption amounts of 1.25 and 1.96 g g –1 , respectively. Notably, these values were significantly higher compared than most other reported common adsorbents and Zn-MOF materials under similar adsorption conditions (Figures b and S3), ,,− The larger specific surface area of Zn-MOF-2 may contribute to its superior performance in iodine absorption compared to Zn-MOF-1. The π-conjugated electron clouds in both Zn-MOFs were conducive to trapping volatile iodine.…”

Dual Photo-/Electrochromic Pyromellitic Diimide-Based Coordination Polymer

“…As we all know, the stability of CPs in different environments (heat, organic solvents, and water) is very significant for practical applications. 50 Therefore, the PXRD patterns of 2 at different temperatures are investigated. As shown in Figure S6a, all major diffraction peaks are consistent with that of the fresh sample in a certain temperature range (60−120 °C), suggesting that 2 possesses excellent thermal stability.…”

Highly pH-stable lanthanide MOFs: a tunable luminescence and ratiometric luminescent probe for sulfamethazine

“…Metal-organic frameworks (MOFs) are prominent types of crystalline functional materials made up of metal ions and organic linkers, and have significant applications in fields such as sorption, magnetism, catalysis, separation, sensing, proton conduction, etc. [1][2][3][4][5][6][7][8][9][10][11][12][13] As a subfamily of MOFs, lanthanide-based MOFs (Ln-MOFs) have extraordinary structures and luminous properties due to the flexible variations of Ln 3+ ions in their coordination number and connectivity. Ln-MOFs have been recognized as potential luminescent probes and multicolor tunable luminescent materials due to their advantages of a large Stokes shift, long-lived, vivid and visible luminous color and exceptional luminous monochromaticity.…”