Lithium and Sodium Ion Distributions in A2- x[W6I14] Structures

Thorsten Hummel; Agnieszka Mos-Hummel; Anna Merkulova; Markus Ströbele; Arun Krishnamurthy; Scott Kroeker; Hans-Jürgen Meyer

doi:10.1021/acs.inorgchem.7b02948

Lithium and Sodium Ion Distributions in A_{2- x}[W₆I₁₄] Structures

Inorg Chem. 2018 Mar 5;57(5):2570-2576. doi: 10.1021/acs.inorgchem.7b02948. Epub 2018 Feb 20.

Authors

Thorsten Hummel¹, Agnieszka Mos-Hummel¹, Anna Merkulova¹, Markus Ströbele¹, Arun Krishnamurthy², Scott Kroeker², Hans-Jürgen Meyer¹

Affiliations

¹ Section for Solid State and Theoretical Inorganic Chemistry, Institute of Inorganic Chemistry , University of Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany.
² Department of Chemistry , University of Manitoba , Winnipeg , Manitoba R3T 2N2 , Canada.

PMID: 29461047
DOI: 10.1021/acs.inorgchem.7b02948

Abstract

Ag₂[W₆I₁₄] and A_{2- 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 A _x[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 A_{2- x}[W₆I₁₄] compounds, because it is the only compound which is soluble in water.