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Polymers 2019, 11(3), 486; https://doi.org/10.3390/polym11030486

Adamantane-Based Micro- and Ultra-Microporous Frameworks for Efficient Small Gas and Toxic Organic Vapor Adsorption

1
School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China
2
Department of Polymer Physics, Elastomers and Energy, Institute of Polymer Science and Technology, CSIC, 28006 Madrid, Spain
3
Guangzhou Institute of Technology, Guangzhou 510075, China
*
Authors to whom correspondence should be addressed.
Received: 31 January 2019 / Revised: 18 February 2019 / Accepted: 5 March 2019 / Published: 13 March 2019
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Abstract

Microporous organic polymers and related porous materials have been applied in a wide range of practical applications such as adsorption, catalysis, adsorption, and sensing fields. However, some limitations, like wide pore size distribution, may limit their further applications, especially for adsorption. Here, micro- and ultra-microporous frameworks (HBPBA-D and TBBPA-D) were designed and synthesized via Sonogashira–Hagihara coupling of six/eight-arm bromophenyl adamantane-based “knots” and alkynes-type “rod” monomers. The BET surface area and pore size distribution of these frameworks were in the region of 395–488 m2 g−1, 0.9–1.1 and 0.42 nm, respectively. The as-made prepared frameworks also showed good chemical ability and high thermal stability up to 350 °C, and at 800 °C only 30% mass loss was observed. Their adsorption capacities for small gas molecules such as CO2 and CH4 was 8.9–9.0 wt % and 1.43–1.63 wt % at 273 K/1 bar, and for the toxic organic vapors n-hexane and benzene, 104–172 mg g−1 and 144–272 mg g−1 at 298 K/0.8 bar, respectively. These are comparable to many porous polymers with higher BET specific surface areas or after functionalization. These properties make the resulting frameworks efficient absorbent alternatives for small gas or toxic vapor capture, especially in harsh environments. View Full-Text
Keywords: organic framework; ultra-microporosity; adsorption; adamantane; Sonogashira-Hagihara coupling organic framework; ultra-microporosity; adsorption; adamantane; Sonogashira-Hagihara coupling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Jiang, W.; Yue, H.; Shuttleworth, P.S.; Xie, P.; Li, S.; Guo, J. Adamantane-Based Micro- and Ultra-Microporous Frameworks for Efficient Small Gas and Toxic Organic Vapor Adsorption. Polymers 2019, 11, 486.

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