Convenient Detection of Pd(II) by a Metal鈥揙rganic Framework with Sulfur and Olefin Functions

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• 作者：Jun He ; Meiqin Zha ; Jieshun Cui ; Matthias Zeller ; Allen D. Hunter ; Shek-Man Yiu ; Shuit-Tong Lee ; 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：7807-7810
• 全文大小：276K
• 年卷期：v.135,no.21(May 29, 2013)
• ISSN：1520-5126

文摘

A highly specific, distinct color change in the crystals of a metal鈥搊rganic framework with pendant allyl thioether units in response to Pd species was discovered. The color change (from light yellow to orange/brick red) can be triggered by Pd species at concentrations of a few parts per million and points to the potential use of these crystals in colorimetric detection and quantification of Pd(II) ions. The swift color change is likely due to the combined effects of the multiple functions built into the porous framework: the carboxyl groups for bonding with Zn(II) ions to assemble the host network and the thioether and alkene functions for effective uptake of the Pd(II) analytes (e.g., via the alkene鈥揚d interaction). The resultant loading of Pd (and other noble metal) species into the porous solid also offers rich potential for catalysis applications, and the alkene side chains are amenable to wide-ranging chemical transformations (e.g., bromination and polymerization), enabling further functionalization of the porous networks.