Synthesis and structure of Na+ intercalated WO3(4,4'-bipyridyl)0.5

Details Synthesis and structure of Na+ intercalated WO3(4,4'-bipyridyl)0.5 Synthesis and structure of Na+ intercalated WO3(4,4'-bipyridyl)0.5

2009-09-28

arxiv.org/abs/0909.4982v1

Physics

Condensed Matter

Materials Science

3 pages, 2 figures

Scientific paper

We have prepared single crystals of WO3(4,4'-bipyridyl)0.5 and doped these by Na-ion implantation. The structure of the resultant NaxWO3(4,4'-bipyridyl)0.5 was determined by single-crystal x-ray diffraction to comprise atomic layers of corner-shared WO5N octahedra linked by the 4,4'-bypyridine via the apical nitrogen. In the observed space group of Pbca, the fully ordered bipyridyl molecules define cage-shaped structures, not the channels erroneously reported previously for the Cmca polymorph. The Na ions are disordered bimodally about the cage centre, displaced in the c-direction so as to lie closer to the apical oxygens.

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