四苯基乙烯基共轭微孔聚合物的制备及其气体吸附

doi:10.6023/A15010082

化学学报 ›› 2015, Vol. 73 ›› Issue (6): 634-640.DOI: 10.6023/A15010082 上一篇下一篇

所属专题：共价有机多孔聚合物

研究论文

四苯基乙烯基共轭微孔聚合物的制备及其气体吸附

赵洋, 王笑颜, 张崇, 蒋加兴

陕西师范大学材料科学与工程学院西安 710062

投稿日期:2015-01-30 发布日期:2015-04-06
通讯作者: 蒋加兴 E-mail:jiaxing@snnu.edu.cn
基金资助:
项目受到国家自然科学(青年)基金(No. 21304055)和中央高校基本科研业务费专项基金(No. GK201501002)的支持.

Conjugated Microporous Polymers Based on Tetraphenylethylene for Gas Adsorption

Zhao Yang, Wang Xiaoyan, Zhang Chong, Jiang Jia-Xing

School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710062

Received:2015-01-30 Published:2015-04-06
Supported by:
Project supported by the National Natural Science Foundation of China (No. 21304055) and the Fundamental Research Funds for the Central Universities (No. GK201501002).

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1. 四苯基乙烯基共轭微孔聚合物的制备及其气体吸附.PDF(305KB)

摘要/Abstract

共轭微孔聚合物由于其在气体吸附与分离、非均相催化和光电子等领域的巨大应用前景而广受关注. 本文以四苯基乙烯为基本构筑单元, 通过Sonogashira-Hagihara偶联反应制备了3种共轭微孔聚合物新材料, 研究了结构组成和构建模块对制备聚合物孔性能和气体吸附性能的影响. 氮气吸附测试结果表明, 由1,1,2,2-四炔四苯基乙烯自聚合制备的TPE-CMP1具有较大的比表面积, 为1096 m²·g^-1. 在1.13 bar/273 K条件下, TPE-CMP1的CO₂吸附能力为2.36 mmol·g^-1; 在1.13 bar/77.3 K条件下, TPE-CMP1对H₂的吸附能力为1.35 wt%. 另外, 制备的共轭微孔聚合物展示出较高的CO₂/N₂选择性吸附值. 由于这类多孔聚合物材料具有合成方法简单、优良的物理化学及热稳定性、高的比表面积和CO₂吸附性能, 因此将在气体吸附与分离方面具有潜在的应用前景.

关键词: 共轭微孔聚合物, 四苯基乙烯, Sonogashira-Hagihara偶联反应, 比表面积, 气体吸附

Conjugated microporous polymers (CMPs) are attracting increasing attention due to their potential applications in areas such as gas adsorption, separation, heterogeneous catalysis and photoelectron. A series of CMPs based on tetraphenylethylene has been synthesized via Pd-catalyzed Sonogashira-Hagihara coupling reaction. During polymerization, all of the polymer networks precipitated from solution as yellow powders that are totally insoluble in common organic solvents tested because of their highly crosslinked structures. Thermogravimetric analysis indicated that all of the polymer networks are thermally stable up to 400 ℃ in nitrogen atmosphere. The high physicochemical and thermal stability could be attributed to the rigid nature of these aromatic polymers, composed solely of strong carbon-carbon and carbon-hydrogen bonds. The absence of the C≡H stretching peaked at around 3280 cm^-1 and the C—Br stretching peaked at around 500 cm^-1 in the FT-IR spectra for the polymer networks demonstrated that most of the ethynyl and bromine functional groups in the starting materials have been consumed by coupling reaction. Powder X-ray diffraction measurements revealed that all of the polymer networks are amorphous in nature. It was found that the homo-coupled polymer network of TPE-CMP1 from 1,1,2,2-tetrakis(4-ethynylphenyl)ethene shows the highest Brunauer-Emmet-Teller specific surface area up to 1096 m²·g^-1 among the resulting polymer networks. TPE-CMP1 exhibits a CO₂ uptake ability of 2.36 mmol·g^-1 at 1.13 bar and 273 K with a H₂ uptake capacity of 1.35 wt% at 1.13 bar and 77.3 K. All of the polymer networks show high CO₂/N₂ selectivity around 30:1 and high isosteric heat of adsorption for CO₂up to 27.6 kJ·mol^-1. Given the facile preparation strategy, the high physicochemical and thermal stability, the high surface area, and the outstanding CO₂ sorption performances, these polymer networks are promising candidates for potential applications in post-combustion CO₂ capture and sequestration technology.

Key words: conjugated microporous polymer, tetraphenylethylene, Sonogashira-Hagihara reaction, gas adsorption

引用此文

赵洋, 王笑颜, 张崇, 蒋加兴. 四苯基乙烯基共轭微孔聚合物的制备及其气体吸附[J]. 化学学报, 2015, 73(6): 634-640.

Zhao Yang, Wang Xiaoyan, Zhang Chong, Jiang Jia-Xing. Conjugated Microporous Polymers Based on Tetraphenylethylene for Gas Adsorption[J]. Acta Chim. Sinica, 2015, 73(6): 634-640.

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四苯基乙烯基共轭微孔聚合物的制备及其气体吸附

Conjugated Microporous Polymers Based on Tetraphenylethylene for Gas Adsorption

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