Polyoxometalate/Polyethylene Glycol Interactions in Water: From Nanoassemblies in Water to Crystal Formation by Electrostatic Screening.

α-Keggin polyoxometalate, α-PW12O403− (PW), forms hybrid crystalline materials with industrial (neutral) polyethylene glycol oligomers (PEG) under mild conditions.

L2IA team

In the present work it is shown that the well-known α-Keggin polyoxometalate, α-PW12O403− (PW), forms hybrid crystalline materials with industrial (neutral) polyethylene glycol oligomers (PEG) under mild conditions, that is, in aqueous medium and at room temperature. The formation of these materials originates from the spontaneous self-assembly of PW with EOx with at least four EO units (x≥ 4). Addition of NaCl induces the collapse of the nanoassemblies and the formation of hybrid crystalline materials. 

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Thomas Buchecker, Xavier Le Goff, Bappaditya Naskar, Arno Pfitzner, Olivier Diat and Pierre Bauduin