Synthesis of Au Nanocrystals/Porous Coordination Polymer Composites by Preferential Self-Assembly of Frameworks

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We report a novel approach for fabricating Au nanocrysltas/porous coorodination polymers (PCPs) heterostructured composite based on preferential self-assembly of frameworks on nanocrystal surface. This approach involves the synthesis of carboxylic acid-fucntionalized Au nanocrystals and preferential growth of frameworks consisting of Zn2+ ions and benzene-1,4-dicarboxylate (bdc) on nanocrystals. Here, the key is to use Au nanocrystals stabilized with mercaptoacetic acid molecules bearing carboxylic acid groups that have strong interaction between metal ions of PCP precursors. During solvothermal reaction for construction of PCP frameworks, Au nanocrystals can be act as scaffolds for self-assembly of framework component. This approach allows us to synthesize Au nanocrystals dispersed in PCP crystals and will be extended to other types of nanocompoiste such as metal oxides and semiconductors.
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