Post-synthetic modification of a metal-organic framework based on 5-aminoisophthalic acid for mercury sorption

• Published in: Inorganic chemistry communications 2019-10, Vol.108, p.107515, Article 107515
• Main Authors: Xu, Wei-Qin, He, Shan, Liu, Sheng-Jie, Liu, Xiao-Hui, Qiu, Yan-Xuan, Liu, Wen-Ting, Liu, Xiao-Jun, Jiang, Liao-Chuan, Jiang, Ji-Jun
• Format: Article
• Language: English
• Subjects: Mercury sorption; Metal-organic frameworks; Post-synthetic modification; Thiol-functionalization
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2019.107515

A copper metal-organic framework (MOF) based on 5-aminoisophthalic acid has been properly modified, obtaining a desired porous framework with open metal sites (OMSs). Thiol-functionalization of the resulting MOF was achieved by grafting dithioglycol onto OMSs through coordination bonding, which was characterized by PXRD, FTIR, TGA, EDX and XPS. Mercury sorption studies have shown that SH@Cu-MOF exhibited good behaviour for removal of mercury species not only in solution (for Hg2+) but also in vapor (for Hg0). The thio-groups were decorated on the OMSs of Cu-MOF under the mile and time-saving condition, which was able to capture mercury species in either the solution (Hg2+) or vapor state (Hg0). [Display omitted] •The modified condition of SH@Cu-MOF was optimized to be mile and fast.•The thiol-functionalized product SH@Cu-MOF was fully characterized by PXRD, FTIR, TGA, EDX and XPS.•SH@Cu-MOF exhibits good behavior to removal of mercury species not only in solution (for Hg2+) but also in vapor (for Hg0).