小柯机器人

SuFEx-enabled Elastic Polysulfates for Efficient Removal of Radioactive Iodomethane and Polar Aprotic Organics through Weak Intermolecular Forces
2022-06-29 16:32

苏州大学路建美团队报道了通过弹性聚硫酸盐的弱分子间力有效去除放射性碘甲烷和极性非质子有机物。相关研究成果发表在2022年6月24日出版的国际知名学术期刊《德国应用化学》。

由于碘甲烷的低吸附能力,捕获放射性碘甲烷及其蒸汽是一个重大挑战。

该文中,研究人员首次开发了一种吡啶包埋的弹性交联聚硫酸盐凝胶(吡啶/TPC cPS),作为碘甲烷捕获的高效吸收剂。每个吡啶包裹的TPC-cPS网络单元充当吡啶和碘甲烷之间形成盐的微型反应器。收率高达96.65%,捕获饱和碘甲烷蒸汽1.573 g吡啶/TPC cPS 1(相当于18.103 g TPC cPS 1),这是迄今为止报告的最高容量。

实验和分子动力学模拟均表明,聚硫酸盐对极性非质子有机物的异常吸附可归因于,聚合物主链中的极性基团(O=S=O)与有机分子中的极性基团之间的静电相互作用将溶剂固定在聚合物基质中,而聚合物中非极性基团与分子之间的范德华力会引起溶胀。

附:英文原文

Title: SuFEx-enabled Elastic Polysulfates for Efficient Removal of Radioactive Iodomethane and Polar Aprotic Organics through Weak Intermolecular Forces

Author: Haibo Wan, Qingfeng Xu, Jiacheng Wu, Cheng Lian, Honglai Liu, Bing Zhang, Jinghui He, Dongyun Chen, Jian-Mei Lu

Issue&Volume: 2022-06-24

Abstract: Capturing radioactive iodomethane and its vapors is a major challenge due to its low adsorption capacity. Herein, we have developed for the first time a pyridine-entrapped elastic crosslinked polysulfate gel (pyridine/TPC-cPS) as an efficient absorbent for iodomethane capture. Each pyridine-encased TPC-cPS network cell acts as a mini-reactor for salt formation between pyridine and iodomethane. The yield reaches up to 96.65% and traps saturated iodomethane vapor of 1.573 g  pyridine/TPC-cPS  1  (equivalent to 18.103 g g  TPC-cPS  1  ), which is the highest capacity reported to date. Both experiments and molecular dynamics simulations reveal that the unusual adsorption of polysulfate for polar aprotic organics can be attributed to the fact that the electrostatic interactions  between the polar group (O=S=O) in the polymer backbone and the polar groups in the organic molecules fixed the solvent in the polymer matrix, while the van der Waals forces between the nonpolar groups in the polymer and molecules induced swelling.

DOI: 10.1002/anie.202208577

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202208577

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