Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
J Am Chem Soc. 2011 Aug 24;133(33):12926-9. doi: 10.1021/ja2041546. Epub 2011 Jul 29.
Electroreduction of oxoanions affords hydroxide equivalents that induce selective deposition of crystalline metal-organic frameworks (MOFs) on conductive surfaces. The method is illustrated by cathodic electrodeposition of Zn(4)O(BDC)(3) (MOF-5; BDC = 1,4-benzenedicarboxylate), which is deposited at room temperature in only 15 min under cathodic potential. Although many crystalline phases are known in the Zn(2+)/BDC(2-) system, MOF-5 is the only observed crystalline MOF phase under these conditions. This fast and mild method of synthesizing MOFs is amenable to direct surface functionalization and could impact applications requiring conformal coatings of microporous MOFs, such as gas separation membranes and electrochemical sensors.
电还原氧阴离子提供了氢氧根离子，从而诱导结晶金属有机骨架（MOF）在导电表面上的选择性沉积。该方法通过在阴极电位下在室温下仅 15 分钟内阴极电沉积 Zn(4)O(BDC)(3)（MOF-5；BDC=1,4-苯二甲酸）来举例说明，其中 BDC=1,4-苯二甲酸。尽管 Zn(2+)/BDC(2-)体系中存在许多晶相，但在这些条件下，MOF-5 是唯一观察到的结晶 MOF 相。这种快速温和的 MOF 合成方法适合直接进行表面功能化，并可能影响需要微孔 MOF conformal 涂层的应用，例如气体分离膜和电化学传感器。
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