Conductivity and structure of poly(ethylene glycol) complexes using energydispersive X-ray diffraction

Triflate salts of Mg(II), Zn(II), and Cu(II) in Liquid, low weight poly(eth ylene glycol) dimethyl ether (PEGM-(400)) to determine their conductivity a nd to ascertain their possible use as electrolyte media, have been studied. Their liquid structures have been studied by energy-dispersive X-ray diffr action. By this technique, the cation geometrical coordination has been det ermined. Furthermore, the local structure of the bivalent cations has been singled out by application of the difference method to isomorphic solutions . We found that the investigated cations have an octahedral coordination, w ith the exception of Cu, which displays two apical bonds longer than the pl anar ones. We also found that the polymer chain is coordinated to the catio ns Mg and Zn through the oxygen atoms of the polymer units 1, 5, and 9.