Inorganic-organic Hybrid Materials Based on Nano-polyoxometalates and Surfactants
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A series of nano-scale polyoxometalates (POMs) with beautiful topologies have been successfully synthesized by destroying the hydration shell of metal oxides. Their magnetic, electronic, and photoluminescent properties and valuable applications in catalysis, medicine, and material science are discussed. By interaction with oppositely charged surfactants, an interesting phase transfer of POMs occurs from aqueous solution to chloroform solution by forming hydrophobic surfactant-encapsulated clusters (HSECs), and then to aqueous solution with more surfactants. Moreover, inorganic-organic hybrids composed of polyoxometalates and surfactants or polyelectrolytes are fabricated by layer-by-layer (LbL) and Langmuir-Blodgett (LB) techniques. A simple solvent-evaporation method is also delicately carried out, and consequently, ordered honeycomb films are self-assembled at air/water interfaces without any extra moist airflow. It is speculated that the condensed water micro-droplets induced by the quick evaporation of solvents play an important role as template for the formation of pores. And many types of modulation are being investigated to construct thin films with different morphologies. The incorporation of functional polyoxometalates in thin films will bridge polyoxometalate chemistry and material chemistry.
KeywordsTransmission Electron Microscopy Image Hybrid Film Multilayer Film Polarize Optical Microscopy Tetradecyltrimethylammonium Bromide
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