Triptycene-Based Microporous Poly(diaminophosphazene)

doi:10.6023/A15010081

Acta Chim. Sinica ›› 2015, Vol. 73 ›› Issue (6): 617-622.DOI: 10.6023/A15010081 Previous Articles Next Articles

Special Issue: 共价有机多孔聚合物

Article

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).

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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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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