基于三蝶烯的微孔聚二胺磷腈

doi:10.6023/A15010081

化学学报 ›› 2015, Vol. 73 ›› Issue (6): 617-622.DOI: 10.6023/A15010081 上一篇下一篇

所属专题：共价有机多孔聚合物

研究论文

基于三蝶烯的微孔聚二胺磷腈

李慧^a, 姜美洋^a, 王求^a,b, 李中华^b, 陈琦^a, 韩宝航^a

a 国家纳米科学中心北京 100190;
b 华中师范大学化学与化工学院武汉 430079

投稿日期:2015-01-29 发布日期:2015-03-08
通讯作者: 陈琦, 韩宝航 E-mail:hanbh@nanoctr.cn
基金资助:
项目受国家自然科学基金(Nos. 21274033和21374024)和科技部国家重大科研项目(No. 2014CB932200)资助.

Triptycene-Based Microporous Poly(diaminophosphazene)

Li Hui^a, Jiang Meiyang^a, Wang Qiu^a,b, Li Zhonghua^b, Chen Qi^a, Han Baohang^a

a National Center for Nanoscience and Technology, Beijing 100190;
b School of Chemistry and Chemical Engineering, Central China Normal University, Wuhan 430079

Received:2015-01-29 Published:2015-03-08
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 21274033 and 21374024) and the National Science and Technology Major Project of the Ministry of Science and Technology of China (No. 2014CB932200).

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摘要/Abstract

近年来有机多孔聚合物材料由于其在气体吸附分离、气体存储及非均相催化等多个领域具有优良性质而受到国内外科学家们广泛的关注. 三蝶烯是一类具有D_3h刚性对称骨架结构的化合物, 同时它特有的结构特点及其丰富的反应性能使其成为一类构筑有机多孔材料的优良建筑块. 基于六氨基三蝶烯盐酸盐和六氯环三磷腈, 通过N-P型一步聚合法制备了两种聚二胺磷腈多孔材料TrpPOP-1和TrpPOP-2. 材料的结构通过固体核磁共振碳谱、磷谱和红外光谱等进行了表征. 氮气吸脱附等温线表明两种聚合物均具有永久的微孔性质, TrpPOP-1和TrpPOP-2的BET比表面积分别为790和640 m²·g^-1, 主要孔径分别在0.63和0.59 nm左右. 孔径分布较窄的多孔聚合物能与小分子气体有更好的相互作用, 因此, 我们对这两种材料的小分子气体(氢气、二氧化碳和甲醛)吸附性能进行了研究. TrpPOP-1的氢气吸附量在77 K和1.0 bar条件下为1.30 wt%, 二氧化碳吸附量在273 K和1.0 bar条件下为16.2 wt%. 材料TrpPOP-2对甲醛的吸附量在298 K为5.5 mg·g^-1.

关键词: 三蝶烯, 气体储存, 微孔聚合物, 聚二胺磷腈

Porous materials have recently drawn much attention owing to their potential applications in gas storage, separations, and heterogeneous catalysis. As a D_3h-symmetric rigid structure, triptycene and its derivatives can be used as suitable building blocks to prepare porous materials with high porosities. Based on the air-stable hexaammoniumtriptycene hexachloride and hexachlorocyclotriphosphazene, porous polymers (TrpPOP-1 and TrpPOP-2) were prepared via one-step polymerization through N-P linkage. The two polymers were characterized at the molecular level by ¹³C NMR and ³¹P NMR as well as IR. The two polymers possess type I nitrogen gas sorption isotherm according to the IUPAC classification. Both TrpPOP-1 and TrpPOP-2 show permanent microporous nature with the Brunauer-Emmett-Teller specific surface area of 790 and 640 m²·g^-1 and exhibit narrow pore size distribution, with dominant pore size locating at 0.59 and 0.63 nm, respectively. Porous polymers with a narrow pore distribution may interact attractively with small gas molecules through improved molecular interaction. Their gas (hydrogen and carbon dioxide) adsorption capacities were measured based on the obtained gas physisorption isotherms. The hydrogen uptake of TrpPOP-1 is 1.30 wt% at 77 K and 1.0 bar, and the carbon dioxide uptake is up to 16.2 wt% at 273 K and 1.0 bar. The higher carbon dioxide loading capacity of TrpPOP-1 may be attributed to its higher charge density at the nitrogen sites of networks that can facilitate local-dipole/quadrupole interactions with carbon dioxide. Meanwhile, the adsorption capacity of the obtained materials for poisonous and harmful organic vapors such as formaldehyde was also investigated. TrpPOP-2 shows a better formaldehyde uptake, which is 5.5 mg·g^-1 at 298 K. Formaldehyde, as a volatile organic compound, is a major air pollutant indoor, therefore, the uptake performance of TrpPOP-2 for formaldehyde would be very promising to remove harmful indoor air pollutant in the environment.

Key words: triptycene, gas storage, microporous polymers, poly(diaminophosphazene)

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李慧, 姜美洋, 王求, 李中华, 陈琦, 韩宝航. 基于三蝶烯的微孔聚二胺磷腈[J]. 化学学报, 2015, 73(6): 617-622.

Li Hui, Jiang Meiyang, Wang Qiu, Li Zhonghua, Chen Qi, Han Baohang. Triptycene-Based Microporous Poly(diaminophosphazene)[J]. Acta Chim. Sinica, 2015, 73(6): 617-622.

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基于三蝶烯的微孔聚二胺磷腈

Triptycene-Based Microporous Poly(diaminophosphazene)

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