Zinc ions metal-organic frameworks

A diamondoid architecture also results when Zn(CN)2- is reacted with Cu(I). The resulting anionic network might be viewed as tetrahedral zinc nodes linked to tetrahedral copper nodes by cyanide spacers, however the nature of coordination at the copper and zinc ions remains unclear. Analysis of the structural data indicated that it is most appropriate to consider the coordination of the copper as 100% organometallic (Cu-C) and the coordination of the zinc 100% metal-organic (Zn-N). The ionic nature of this particular framework means that the presence of a counterion in the resulting cavities is required. Indeed, N(CH3)4 fits comfortably inside the adamantoid cavity and precludes interpenetration. 

Several open-framework metal oxalates have been synthesized and characterized in last two to three years. They include ID, 2D and 3D structures. Following the success of the amine phosphate route to open-framework metal phosphates, reactions of organic amine oxalates with metal ions have been carried out. These reactions have yielded a hierarchy of zinc oxalates as shown in Figure 7. These different structures are mutually related. 

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