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Targeted synthesis of porous aromatic frameworks with stimuli-responsive adsorption properties

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Abstract

Two porous aromatic frameworks, PAF-36 and PAF-37, containing azo moieties, were synthesized via Sonogashira-Hagihara coupling reactions. Gas sorption measurements indicated that reversible stimuli-responsive adsorption properties were triggered by ultraviolet (UV) irradiation and heat treatment, because of the presence of azo functional groups. The initial Brunauer-Emmett-Teller (BET) surface areas of PAF-36 and PAF-37 were 325 and 443 m2 g−1, respectively. After UV irradiation, the BET surface areas increased during the trans-cis isomerization process, and the micropore sizes, around 6 and 8 Å, also increased. In addition, the CO2 adsorption capacities increased slightly because of trans-cis conversion of azo groups. It is worth mentioning that the CO2 uptakes of the polymers were almost constant during multiple cycles of alternating external stimuli, displaying high switchability of the trans-cis isomerization.

中文摘要

本文报导了通过Sonogashira-Hagihara反应制备两种骨架含有偶氮官能团的多孔芳香骨架材料, PAF-36和PAF-37, 并研究了它们的氮气及二氧化碳吸附性能. 偶氮官能团经过紫外光照射和加热可以实现顺式和反式结构变换. 它们初始BET比表面积分别是325 m2 g−1和443 m2 g−1. 经过紫外光照, 偶氮官能团发生顺反异构化, 材料的BET比表面积以及在6 Å和8 Å的孔径分布均有所增大. 另外, 紫外光照后, 材料的CO2吸附性能也有一定提高. 对样品进行了三次紫外/加热循环实验后, 样品CO2吸附量几乎保持不变, 表明材料中可以发生顺反异构化的偶氮基团具有高效的开关性能. 在多孔材料中引入光控基团, 可以有效改变材料的孔结构, 进而影响材料的气体分子吸附性能.

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Authors and Affiliations

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China

    Rongrong Yuan, Hao Ren, Hongming He, Lingchang Jiang & Guangshan Zhu

Authors
  1. Rongrong Yuan
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  2. Hao Ren
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  3. Hongming He
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  4. Lingchang Jiang
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  5. Guangshan Zhu
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Corresponding authors

Correspondence to Hao Ren or Guangshan Zhu.

Additional information

Rongrong Yuan obtained her bachelor’s degree in chemistry from Tsingdao University of Science and Technology in 2011. She then joined Professor Guangshan Zhu’s research group for her master and PhD studies, mainly working on targeted synthesis of porous aromatic frameworks for gas storage. Her research interests focus on the synthesis, structure, and functions of porous organic frameworks.

Hao Ren obtained his bachelor’s degree in chemistry from Jilin University in 2006. He then joined Professor Guangshan Zhu’s research group for his master and PhD studies, mainly working on targeted synthesis of porous aromatic frameworks for gas storage. After receiving his PhD degree in 2011, he became an assistant professor at the Department of Chemistry, Jilin University. His research interests focus on the synthesis, structure, and functions of porous organic frameworks.

Guangshan Zhu received his BSc and PhD degrees in chemistry from Jilin University (China) in 1993 and 1998, respectively. He was then appointed as an assistant professor at the Department of Chemistry (Jilin University). From 1999 to 2000, he worked as a post-doctoral research associate at Tohoku University in Japan. He has been a full professor of Jilin University since 2001. The current research in his group focuses on the design and synthesis of zeolites, metalorganic frameworks, and porous organic frameworks for applications in gas-liquid adsorption, separation, and other advanced applications.

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Yuan, R., Ren, H., He, H. et al. Targeted synthesis of porous aromatic frameworks with stimuli-responsive adsorption properties. Sci. China Mater. 58, 38–43 (2015). https://doi.org/10.1007/s40843-015-0023-8

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