Inorganic-organic hybrid POMs

Inorganic-organic hybrid POMs have attracted much attention because the electron and steric properties of the POMs significantly affect the catalytic properties of a metal center [88-91]. One hybrid catalyst consisted of a metallo-salen complex attached covalently to a lacunary POM [SiWn039]8- via two propyl spacers. In contrast with an usual Mn(III) salen species, the metallosalen complex modified with the POM afforded a more oxidized Mn(IV) salen-POM or Mn(III) salen cation radical-POM compound [89]. 

Organically functionalized POMs (see for review [144]) are useful hybrid nanobuilding blocks to obtain hybrid organic-inorganic structures [139 and references therein]. 

Within the precincts of organic-inorganic hybrid materials, it is worth mentioning an interesting copper-aqua-crown ether complex, supported by a Lindqvist-type POM anion [M06O19]2, obtained by inclusion of the relatively small Cu2+ ion into... 

The y-isomer of a divacant Keggin-type silicodecatungstate [7-SiWio036] [49] has been used as a precursor for dimetal-substituted POMs involving Ti, V, Cr, Mn, Fe, Mo, and W metals [50-59] and organic-inorganic hybrids [60-63]. The 0x0... 

The limit in the preparation of hybrid materials by physical entrapment is the lack of an effective attachment between the organic and the inorganic domain, which affects the stability of the resulting hybrid material and can lead to phase separations between POM domains and the polymer matrix, severely limiting their applications. 

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