Nitrogen-rich diaminotriazine-based porous organic polymers for small gas storage and selective uptake

作者：Song, Wei-Chao; Xu, Xiao-Kang; Chen, Qiang; Zhuang, Zhan-Zhong; Bu, Xian-He^*

来源：Polymer Chemistry, 2013, 4(17): 4690-4696.

DOI：10.1039/c3py00590a

• CONJUGATED MICROPOROUS POLYMERS
• TRIAZINE-BASED FRAMEWORKS
• CARBON-DIOXIDE CAPTURE
• HIGH-SURFACE-AREA
• HYDROGEN STORAGE
• CO2 CAPTURE
• AROMATIC FRAMEWORK
• INTRINSIC MICROPOROSITY
• SEPARATION
• ADSORPTION

A series of new nitrogen-rich aminal-linked porous organic polymers (APOPs) has been constructed by cost-effective and simple condensation reactions between diaminotriazine-based tectonics and benzaldehyde. The facile and one-pot approach suggests a platform to incorporate functional groups in their pores to tune the affinity between gas molecules and the frameworks. Due to the chemical functionalization and nitrogen-rich pore surface, the APOPs with a moderate specific surface area (S-BET = 724-1402 m(2) g(-1)) exhibit significant gas adsorption and high isosteric heats of adsorption (CO2: up to 4.54 mmol g(-1) at 273 K and 1 bar, 33.3 kJ mol(-1); H-2: up to 8.95 mmol g(-1) at 77 K and 1 bar, 9.4 kJ mol(-1)). The isosteric heats of adsorption (Q(st)) can be tuned by the selection of polar group functionalized building blocks, and their values can be enhanced from 26.6 to 33.3 kJ mol(-1) for CO2, while the increasing of Q(st) is beneficial for flue gas separation. Indeed, the strong affinity for CO2 within the APOPs gives rise to a higher CO2 uptake at low pressures (0.15 bar) along with good selectivity over N-2.

• 出版日期2013-9-17
• 单位南开大学