title: An Azine-Linked Covalent Organic Framework: Synthesis, Characterization and Efficient Gas Storage.
abstract: A azine-linked covalent organic framework, COF-JLU2, was designed and synthesized by condensation of hydrazine hydrate and 1,3,5-triformylphloroglucinol under solvothermal conditions for the first time. The new covalent organic framework material combines permanent micropores, high crystallinity, good thermal and chemical stability, and abundant heteroatom activated sites in the skeleton. COF-JLU2 possesses a moderate BET surface area of over 410 m(2)  g(-1) with a pore volume of 0.56 cm(3)  g(-1) . Specifically, COF-JLU2 displays remarkable carbon dioxide uptake (up to 217 mg g(-1) ) and methane uptake (38 mg g(-1) ) at 273 K and 1 bar, as well as high CO2 /N2 (77) selectivity. Furthermore, we further highlight that it exhibits a higher hydrogen storage capacity (16 mg g(-1) ) than those of reported COFs at 77 K and 1 bar.
authors.affiliation: State Key Laboratory for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China), Fax: (+86) 43185168421.
authors.forename: Zhongping
authors.initials: Z
authors.lastname: Li
authors.affiliation: State Key Laboratory for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China), Fax: (+86) 43185168421.
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Zhi
authors.affiliation: School of Chemistry, Beijing Institute of Technology, Beijing, 100081 (P. R. China).
authors.forename: Xiao
authors.initials: X
authors.lastname: Feng
authors.affiliation: CAS Key Laboratory of Nanosystem and Hierarchy Fabrication, National Center for Nanoscience and Technology, Beijing 100190 (P. R. China).
authors.forename: Xuesong
authors.initials: X
authors.lastname: Ding
authors.affiliation: Department State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130012 (P. R. China).
authors.forename: Yongcun
authors.initials: Y
authors.lastname: Zou
authors.affiliation: State Key Laboratory for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China), Fax: (+86) 43185168421. xm_liu@jlu.edu.cn.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 (P. R. China), Fax: (+86) 43185168421.
authors.forename: Ying
authors.initials: Y
authors.lastname: Mu
keywords: carbon dioxide uptake; covalent organic framework; hydrogen storage; porous material; selectivity