Metal powder organic solvent systems

POMs form by a self-assembly process, typically in an acidic aqueous solution and can be isolated as powder or crystals with counter-cations. Appropriate selection of counter-cations can control the solubility of POMs in various reaction media. For homogeneous system, alkylammonium cations, generally TBA, are selected as counter-cations of POM anions for the dissolution in organic solvents such as acetonitrile, DMF, DMSO and 1,2-dichloroethane. POMs with metal counter-cations such asNa +, K+,Rb+,Cs + and Ag + are not soluble in common organic solvents. 

The possibilities with such procedures might be envisioned when looking at the nanoscale structures in dispersion or deposited on various substrates from dispersion. The deposits of the organic metal fi om a binder-firee dispersion (dispersion of the pure raw powder in pure solvents) result in a highly structured layer system the originally 10 run primary particles assemble into 50-100 nm big particles, which are laid down in an almost perfect cubic monoclinic lattice (Figure 1.19). It is not totally... 

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