Computed Properties of C2H4I2In 2022 ,《Optimizing functional layer of cation exchange membrane by three-dimensional cross-linking quaternization for enhancing monovalent selectivity》 appeared in Chinese Chemical Letters. The author of the article were Pan, Jiefeng; Zhao, Lei; Yu, Xiaohong; Dong, Jiajing; Liu, Lingling; Zhao, Xueting; Liu, Lifen. The article conveys some information:
Monovalent cation perm-selective membrane (MCPMs) allow fast and selective transport of monovalent cations, and they are promisingly required for extraction of special ions, such as lithium extraction, acid recovery and sea salt production Herein, we report a novel strategy to design the critical functional layers of MCPMs with both space charge repulsion and cross-linked dense screenability. The in-situ deposition polymerization of pyrrole was carried out on the surface of sulfonated polyphenyl sulfone (SPPSU) substrate membrane followed by crosslinking quaternization of the polypyrrole (PPy) layer with diiodinated functional mols., thus, the membrane obtained more excellent selective permeability and stable transport properties of monovalent cations. It confirms that the designed PPy layers with charged surface and crosslinking structure improved the hydrophilicity, facilitated cation transport and increased ion flux. Meanwhile, for the dense PPy layer, the charged cross-linked structure endowed the functional layer with the synergistic characteristics of Donnan exclusion and pore size sieving for pos. charged ions, which improved the monovalent cation perm-selectivity of the membranes. At a constant c.d. of 5.1 mA/cm2, the optimal membrane exhibited superior perm-selectivity (PNaMg = 2.07) and monovalent cation flux (JNa+ = 2.80 x 10-8 (mol cm-2 s-1)) during electrodialysis. After reading the article, we found that the author used 1,2-Diiodoethane(cas: 624-73-7Computed Properties of C2H4I2)
1,2-Diiodoethane(cas: 624-73-7) is one of organic iodides. The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine. Organic iodides can be alkyl, alkenyl, or alkynyl, and all of them are very reactive toward with many kinds of nucleophiles.Computed Properties of C2H4I2
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com