Sheng, Fangmeng; Wu, Bin; Li, Xingya; Xu, Tingting; Shehzad, Muhammad A.; Wang, Xiuxia; Ge, Liang; Wang, Huanting; Xu, Tongwen published their research in Advanced Materials (Weinheim, Germany) in 2021. The article was titled 《Efficient Ion Sieving in Covalent Organic Framework Membranes with Sub-2-Nanometer Channels》.Category: alcohols-buliding-blocks The article contains the following contents:
Membranes of sub-2-nm channels show high ion transport rates, but it remains a great challenge to design such membranes with desirable ion selectivities for ion separation applications. Here, covalent organic framework (COF) membranes with a channel size of ≈1.4 nm and abundant hydrogen bonding sites, exhibiting efficient ion sieving properties are demonstrated. The COF membranes have high monovalent cation permeation rates of 0.1-0.2 mol m-2 h-1 and extremely low multivalent cation permeabilities, leading to high monovalent over divalent ion selectivities for K+/Mg2+ of ≈765, Na+/Mg2+ of ≈680, and Li+/Mg2+ of ≈217. Exptl. measurements and theor. simulations reveal that the hydrogen bonding interaction between hydrated cations and the COF channel wall governs the high selectivity, and divalent cations transport through the channel needs to overcome higher energy barriers than monovalent cations. These findings provide an effective strategy for developing sub-2-nm sized membranes with specific interaction sites for high-efficiency ionic separation The experimental process involved the reaction of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Category: alcohols-buliding-blocks)
2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives.Category: alcohols-buliding-blocksFor acyl phloroglucinols, it is considered the largest category of compounds among phloroglucinols of natural characteristics.
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts