Truxene/triazatruxene-based conjugated microporous polymers with flexible@rigid mutualistic symbiosis for efficient CO2 storage. Issue 49 (July 2021)

• Record Type: Journal Article
• Authors: Li, Ze; Wang, Wenbo; Xu, Yongsheng; Zhu, Yuanzhi; Guo, Xiaomeng
• Is Part Of: Journal of CO₂ utilization. Issue 49(2021)
• Publication Date: 2021-07
• Subjects: Conjugated microporous polymers -- Flexible@rigid structure -- CO2 storage and sequestration -- Gas selectivities; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2021.101550
• Languages: English
• ISSNs: 2212-9820

Abstract

Highlights: The flexible@rigid mutualistic symbiosis of two series of CMPs are designed. Alkyl chain modified core structure to optimize porosity of CMPs. The mutualistic symbiosis materials deliver a high CO2 uptake ability. Abstract: Conjugated microporous polymers (CMPs), with rigid π‒conjugated skeletons and tunable microporous structure, have shown great potential as gas storage and sequestration materials, however, the inherent poor solubility of initial building block in the polymerization process always leads to low crosslinking polymers and limited application. Here, in this work, we have designed the flexible@rigid mutualistic symbiosis in two series of CMPs (2D extend truxene and triazatruxene cores, P‒C(‒Et) and P‒N(‒Et). The results demonstrated that rational flexible groups with additional rigid skeletons structure could change the 2D C3 symmetric building core into 3D steric configuration, which increased the target polymers' BET surface areas more than 3 times and narrowed the microporous width. The optimized molecule structure delivers a high CO2 uptake ability, 5.8–11.5 wt% for truxene, and 7.8–17.6 wt% for triazatruxene at 273 K and 1.0 bar. Besides, the optimized structures also have superior selectivity of CO2 when the N2 or CH4 still exists in the system. In conclusion, this work provides a fundamental understanding for the design of CMPs for high CO2 adsorption and separation performances.