Effective Mercury Sorption by Thiol-Laced Metal鈥揙rganic Frameworks: in Strong Acid and the Vapor Phase
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- 作者：Ka-Kit Yee ; Nele Reimer ; Jie Liu ; Sum-Yin Cheng ; Shek-Man Yiu ; Jens Weber ; Norbert Stock ; Zhengtao Xu
- 刊名：The Journal of the American Chemical Society
- 出版年：2013
- 出版时间：May 29, 2013
- 年：2013
- 卷：135
- 期：21
- 页码：7795-7798
- 全文大小：239K
- 年卷期：v.135,no.21(May 29, 2013)
- ISSN：1520-5126
文摘
Free-standing, accessible thiol (鈭扴H) functions have been installed in robust, porous coordination networks to provide wide-ranging reactivities and properties in the solid state. The frameworks were assembled by reacting ZrCl4 or AlCl3 with 2,5-dimercapto-1,4-benzenedicarboxylic acid (H2DMBD), which features the hard carboxyl and soft thiol functions. The resultant Zr-DMBD and Al-DMBD frameworks exhibit the UiO-66 and CAU-1 topologies, respectively, with the carboxyl bonded to the hard Zr(IV) or Al(III) center and the thiol groups decorating the pores. The thiol-laced Zr-DMBD crystals lower the Hg(II) concentration in water below 0.01 ppm and effectively take up Hg from the vapor phase. The Zr-DMBD solid also features a nearly white photoluminescence that is distinctly quenched after Hg uptake. The carboxyl/thiol combination thus illustrates the wider applicability of the hard-and-soft strategy for functional frameworks.