Abstract

The charge transfer salt, (ET)5PVMo11O40·2H2O [ET=bis(ethylene)-dithiotetrathiafulvalene], was prepared by reducing the diamagnetic molybdovanadophosphoric heteropoly acid (H4PMo11VO40·nH2O, HMVP) with the organic donor ET. The u.v.-vis spectrum of the complex shows an electronic transfer band at 900nm. The i.r. and Raman spectra suggest that the ET donor molecules are all completely ionized. Magnetic measurements indicate the presence of antiferromagnetic interactions in the ET organic sublattice. The e.s.r. spectrum exhibits a VIV signal with g=1.9718 and a=57.5cm−1. Over the measured temperature range (75–300K), no significant interaction between the paramagnetic anion and the organic radical cation is observed.

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