title: Thiol-functionalization of metal-organic framework by a facile coordination-based postsynthetic strategy and enhanced removal of Hg2+ from water.
abstract: The presence of coordinatively unsaturated metal centers in metal-organic frameworks (MOFs) provides an accessible way to selectively functionalize MOFs through coordination bonds. In this work, we describe thiol-functionalization of MOFs by choosing a well known three-dimensional (3D) Cu-based MOF, i.e. [Cu(3)(BTC)(2)(H(2)O)(3)](n) (HKUST-1, BTC=benzene-1,3,5-tricarboxylate), by a facile coordination-based postsynthetic strategy, and demonstrate their application for removal of heavy metal ion from water. A series of [Cu(3)(BTC)(2)](n) samples stoichiometrically decorated with thiol groups has been prepared through coordination bonding of coordinatively unsaturated metal centers in HKUST-1 with -SH group in dithioglycol. The obtained thiol-functionalized samples were characterized by powder X-ray diffraction, scanning electron microscope, energy dispersive X-ray spectroscopy, infrared spectroscopy, and N(2) sorption-desorption isothermal. Significantly, the thiol-functionalized [Cu(3)(BTC)(2)](n) exhibited remarkably high adsorption affinity (K(d)=4.73 × 10(5)mL g(-1)) and high adsorption capacity (714.29 mg g(-1)) for Hg(2+) adsorption from water, while the unfunctionalized HKUST-1 showed no adsorption of Hg(2+) under the same condition.
authors.affiliation: Laboratory of Advanced Porous Materials, School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Ke
authors.forename: Ling-Guang
authors.initials: LG
authors.lastname: Qiu
authors.forename: Yu-Peng
authors.initials: YP
authors.lastname: Yuan
authors.forename: Fu-Min
authors.initials: FM
authors.lastname: Peng
authors.forename: Xia
authors.initials: X
authors.lastname: Jiang
authors.forename: An-Jian
authors.initials: AJ
authors.lastname: Xie
authors.forename: Yu-Hua
authors.initials: YH
authors.lastname: Shen
authors.forename: Jun-Fa
authors.initials: JF
authors.lastname: Zhu
mesh_terms: D000327:Adsorption; D007700:Kinetics; D008628:Mercury / Q000302:isolation & purification*; D000073396:Metal-Organic Frameworks; D008855:Microscopy, Electron, Scanning; D009942:Organometallic Compounds / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D000073396:Metal-Organic Frameworks; D009942:Organometallic Compounds; D013438:Sulfhydryl Compounds; D014874:Water Pollutants, Chemical; C539834:bis(1,3,5-benzenetricarboxylate)tricopper(II); D008628:Mercury