Synthesis of covalent triazine-based frameworks with high CO2 adsorption and selectivity

doi:10.1039/c5py01090j

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	Synthesis of covalent triazine-based frameworks with high CO2 adsorption and selectivity
	Gu, Chunyang 1,2; Liu, Deyu 1; Huang, Wei 1; Liu, Jie1 ; Yang, Renqiang 1
	2015
发表期刊	POLYMER CHEMISTRY
卷号	6 期号:42 页码:7410-7417
摘要	Four covalent triazine-based frameworks (PCTF-1 to PCTF-4) with triphenylamine as the core were synthesized by a consolidated ionothermal reaction between aromatic nitriles under the catalysis of ZnC(l)2. The Brunauer-Emmett-Teller (BET) specific surface area values of PCTF-1 (853 m(2) g(-1)), PCTF-2 (811 m(2) g(-1)) and PCTF-3 (391 m(2) g(-1)) are gradually decreased when increasing the length of branched arm. It indicates that PCTF using monomers with longer branches can be packed more efficiently, resulting in higher density and lower surface area. PCTF-4, compared with PCTF-2, just has the middle benzene of the branches replaced with benzothiadiazole, however N-2 adsorption isotherms showed that its BET specific surface area value (1404 m(2) g(-1)) is the highest among the PCTFs, almost two times that of PCTF-2. The nitrogen-rich characteristics of C3N3 triazine rings result in the frameworks' strong affinity for CO2 and thereby high CO2 adsorption capacity. In particular PCTF-4 with benzothiadiazole exhibited the highest CO2 uptake (20.5 wt%) at 273 K and 1 bar, this value is one of the highest reported values for covalent triazine-based frameworks. The results demonstrate that the introduction of strong polar groups (benzothiadiazole) into a polymer skeleton is an efficient strategy to produce CO2-philic microporous organic polymers with enhanced binding affinity to CO2 molecules. In addition, such PCTFs with high physical-chemical stability and comparable BET surface areas exhibited ideal CO2/N-2 selectivities (14-56) and CO2/CH4 selectivities (11-20) at 273 K, showing that these materials are potential candidates for gas storage and separation. However, in the presence of water vapor, the CO2 uptake of all polymers decreased probably due to the formation of hydrogen bonds with water, suggesting that materials that perform well under dry conditions may deteriorate under practical conditions.
文章类型	Article
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1039/c5py01090j
关键词[WOS]	MICROPOROUS ORGANIC POLYMERS ; CARBON-DIOXIDE CAPTURE ; BENZIMIDAZOLE-LINKED POLYMERS ; POROUS AROMATIC FRAMEWORK ; GAS UPTAKE CAPACITIES ; HIGH-SURFACE-AREA ; INTRINSIC MICROPOROSITY ; HYDROGEN STORAGE ; NETWORKS SYNTHESIS ; SEPARATION
收录类别	SCI
语种	英语
WOS研究方向	Polymer Science
WOS类目	Polymer Science
WOS记录号	WOS:000363214600008
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/6718
专题	先进有机功能材料研究组
作者单位	1.Chinese Acad Sci, CAS Key Lab Biobased Mat, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Gu, Chunyang,Liu, Deyu,Huang, Wei,et al. Synthesis of covalent triazine-based frameworks with high CO2 adsorption and selectivity[J]. POLYMER CHEMISTRY,2015,6(42):7410-7417.
APA	Gu, Chunyang,Liu, Deyu,Huang, Wei,Liu, Jie,&Yang, Renqiang.(2015).Synthesis of covalent triazine-based frameworks with high CO2 adsorption and selectivity.POLYMER CHEMISTRY,6(42),7410-7417.
MLA	Gu, Chunyang,et al."Synthesis of covalent triazine-based frameworks with high CO2 adsorption and selectivity".POLYMER CHEMISTRY 6.42(2015):7410-7417.