ic7b02948_si_001.pdf (470.98 kB)
Lithium and Sodium Ion Distributions in A2–x[W6I14] Structures
journal contribution
posted on 2018-02-20, 15:04 authored by Thorsten Hummel, Agnieszka Mos-Hummel, Anna Merkulova, Markus Ströbele, Arun Krishnamurthy, Scott Kroeker, Hans-Jürgen MeyerAg2[W6I14] and A2–x[W6I14] compounds with A = Na, Li were prepared from binary
tungsten iodides (W3I12) and corresponding metal
iodides. Their crystal structures are analyzed on the basis of X-ray
diffraction data. 7Li and 23Na solid-state NMR
measurements reveal that Li+ and Na+ ions are
distributed over two sites in the respective structures. These results
shed some new light on Ax[M6I14] with A = alkali and M = Mo, W compounds being reported
with x = 1 and 2, which exhibit photophysical properties.
The lithium compound is an exception in the series of A2–x[W6I14] compounds, because
it is the only compound which is soluble in water.