Channel-wall functionalization in covalent organic frameworks for the enhancement of CO2 uptake and CO2/N-2 selectivity

doi:10.1039/c6ra04859e

	Channel-wall functionalization in covalent organic frameworks for the enhancement of CO2 uptake and CO2/N-2 selectivity
	Zhao, Shang 1,2; Ma, Wei 1; Wang, Yu 2; Hao, Ce 3; Guo, Xinwen 3; Gao, Yanan 2; Dong, Bin 2; Ge, Rile 2; Wang, Chang 2; Song, Xuedan 3
刊名	RSC ADVANCES
	2016
卷号	6 期号:45 页码:38774-38781
ISSN号	2046-2069
DOI	10.1039/c6ra04859e
文献子类	Article
英文摘要	A series of tailored covalent organic frameworks (COFs), i.e. [N=N](X%)-TAPH-COFs and [C=C](X%)-TAPH-COFs, were synthesized by post-fabrication of [HO](X%)-TAPH-COFs with 4-phenylazobenzoyl chloride (PhAzo) and 4-stilbenecarbonyl chloride (PhSti), respectively. Powder X-ray diffraction (PXRD), FT-IR, and solution-state H-1 NMR of the digested COFs were applied to clarify the functional groups integrated in the pore channels. Gas sorption isotherms confirmed that the [N=N](X%)-TAPH-COFs and [C=C](X%)-TAPH-COFs had moderate surface areas, narrow pore sizes, and good physicochemical stability. Compared with [C=C](X%)-TAPH-COFs, the [N=N](X%)-TAPH-COFs exhibited higher CO2 uptake capacities of up to 207 mg g(-1) (273 K and 1 bar), isosteric heats of adsorption for CO2 (30.7-43.4 kJ mol(-1)), and CO2/N-2 selectivities of up to 78 (273 K) because of the dipole interactions between the azo group and CO2 as well as the N-2-phobic behavior of the azo group. Furthermore, although the decreased pore size was advantageous for increasing CO2 adsorption, the decreased surface area of the COFs would undoubtedly decrease CO2 adsorption if too many functional groups were introduced.
WOS关键词	CARBON-DIOXIDE CAPTURE ; GAS-STORAGE APPLICATIONS ; EXCEPTIONALLY HIGH CO2 ; ADSORPTION ; POLYMER ; IMINE
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000374972800035
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/170840]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Gao, Yanan
作者单位	1.Dalian Univ Technol, Dept Chem, Dalian 116024, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 3.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Shang,Ma, Wei,Wang, Yu,et al. Channel-wall functionalization in covalent organic frameworks for the enhancement of CO2 uptake and CO2/N-2 selectivity[J]. RSC ADVANCES,2016,6(45):38774-38781.
APA	Zhao, Shang.,Ma, Wei.,Wang, Yu.,Hao, Ce.,Guo, Xinwen.,...&Song, Xuedan.(2016).Channel-wall functionalization in covalent organic frameworks for the enhancement of CO2 uptake and CO2/N-2 selectivity.RSC ADVANCES,6(45),38774-38781.
MLA	Zhao, Shang,et al."Channel-wall functionalization in covalent organic frameworks for the enhancement of CO2 uptake and CO2/N-2 selectivity".RSC ADVANCES 6.45(2016):38774-38781.