title: Putting an ultrahigh concentration of amine groups into a metal-organic framework for CO2capture at low pressures.
abstract: Tremendous efforts have been devoted to increasing the CO2capture performance of porous materials, especially for low CO2concentration environments. Here, we report that hydrazine can be used as a diamine short enough to functionalize the small-pore metal-organic framework [Mg2(dobdc)] (H4dobdc = 2,5-dihydroxyl-1,4-benzenedicarboxylic acid). By virtue of the ultrahigh concentration of free amine groups (6.01 mmol g-1or 7.08 mmol cm-3) capable of reversible carbamic acid formation, the new material [Mg2(dobdc)(N2H4)1.8] achieves a series of new records for CO2capture, such as single-component isotherm uptakes of 3.89 mmol g-1or 4.58 mmol cm-3at the atmospheric CO2concentration of 0.4 mbar at 298 K and 1.04 mmol g-1or 1.22 mmol cm-3at 328 K, as well as more than a 4.2 mmol g-1or 4.9 mmol cm-3adsorption/desorption working capacity under dynamic mixed-gas conditions with CO2concentrations similar to those in flue gases and ambient air.
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Pei-Qin
authors.initials: PQ
authors.lastname: Liao
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Xun-Wei
authors.initials: XW
authors.lastname: Chen
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Si-Yang
authors.initials: SY
authors.lastname: Liu
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Xu-Yu
authors.initials: XY
authors.lastname: Li
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Yan-Tong
authors.initials: YT
authors.lastname: Xu
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Minni
authors.initials: M
authors.lastname: Tang
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Zebao
authors.initials: Z
authors.lastname: Rui
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Hongbing
authors.initials: H
authors.lastname: Ji
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Jie-Peng
authors.initials: JP
authors.lastname: Zhang
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry and Chemical Engineering , Sun Yat-Sen University , Guangzhou 510275 , China . Email: zhangjp7@mail.sysu.edu.cn.
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Chen