Hypercrosslinked microporous organic polymer networks derived from silole-containing building blocks
Hypercrosslinked microporous organic polymer networks derived from silole-containing building blocks
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DOI：
10.1016/j.polymer.2014.09.014
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发表时间：
2014-10
期刊：
影响因子：
4.6
通讯作者：
Yinghua Zhang;Yuda Li;Feng Wang;Yang Zhao;Chong Zhang;Xiao-yan Wang;Jia-Xing Jiang
中科院分区：
文献类型：
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作者：
Yinghua Zhang;Yuda Li;Feng Wang;Yang Zhao;Chong Zhang;Xiao-yan Wang;Jia-Xing Jiang
通过无水 FeCl3 促进的 Friedel-Crafts 烷基化反应设计并合成了三种含噻咯的超交联微孔有机聚合物网络。结果表明，苯取代与硅原子相连的甲基对聚合物网络的表面积和气体吸收能力的影响可以忽略不计。由 1,1-二甲基-2,3,4,5-四苯基硅咯生成的网络-1 的表面积高达 1236 m2g−1，吸氢能力为 1.33 wt% (77.3 K/1.13 bar)，二氧化碳捕获能力在 273 K/1.13 bar 下为 2.94 mmol g−1。所有聚合物网络的二氧化碳吸附等量热在零覆盖度下均超过 25 kJ/mol，因为在聚合物骨架中引入硅原子增强了吸附剂与 CO2 分子之间的结合亲和力。此外，在 273 K 时，聚合物网络对 CO2/N2 和 CO2/CH4 的选择性分别约为 35 和 6。这些结果表明这些材料是燃烧后二氧化碳捕获和分离应用的潜在候选材料。
Three silole-containing hypercrosslinked microporous organic polymer networks were designed and synthesized via Friedel–Crafts alkylation promoted by anhydrous FeCl3. The results demonstrated that the substitution of methyl group connected with silicon atom by benzene has negligible effect on the surface area and gas uptake ability of the polymer networks. The network-1 produced from 1,1-dimethyl-2,3,4,5-tetraphenylsilole shows a surface area up to 1236 m2g−1with the hydrogen uptake ability of 1.33 wt% (77.3 K/1.13 bar) and a carbon dioxide capture capacity of 2.94 mmol g−1at 273 K/1.13 bar. The isosteric heats of carbon dioxide sorption for all of the polymer networks exceed 25 kJ/mol at the zero coverage because the introduction of silicon atom into the polymer skeleton enhanced the binding affinity between the adsorbent and CO2molecules. In addition, the selectivity of the polymer networks for CO2/N2and CO2/CH4were found to be around 35 and 6 at 273 K, respectively. These results show that these materials are potential candidates for applications in post-combustion CO2capture and separation.