Inorganic vs organic cation ionic liquids and their solutions with alkali metal containing ionic liquids

T. G. Tucker; S. K. Davidowski; Charles Angell

doi:10.1149/2.1331702jes

Inorganic vs organic cation ionic liquids and their solutions with alkali metal containing ionic liquids

T. G. Tucker, S. K. Davidowski, Charles Angell

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The burgeoning field of ionic liquids (in the current sense of low-melting liquids (T_m < 100°C) consisting only of ions), has been dominated by liquids containing organic molecular cations. Although a few cases of all-inorganic ionic liquids are known, the field is relatively unexplored. As in the case of the organic cation salts, the inorganic ionic liquids can have aprotic, protic, and solvate cases, and can also be mixed with low melting alkali salts to give mixed alkali-molecular inorganic ionic liquid systems. Here we explore the interesting properties of (i) a low-melting alkali bromoaluminate, NaAl₂Br₇, which exhibits huge alkali cation decoupling in the crystalline state (such that there is very little change in conductivity on fusion) and (ii) its mixture with the low-melting inorganic ionic liquid [PBr₄⁺][Al₂Br₇^-]. The structures and ionicities are confirmed byWalden plots and by ³¹P and ²⁷Al NMR spectroscopy.

Original language	English (US)
Pages (from-to)	H153-H158
Journal	Journal of the Electrochemical Society
Volume	164
Issue number	4
DOIs	https://doi.org/10.1149/2.1331702jes
State	Published - 2017

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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title = "Inorganic vs organic cation ionic liquids and their solutions with alkali metal containing ionic liquids",

abstract = "The burgeoning field of ionic liquids (in the current sense of low-melting liquids (Tm < 100°C) consisting only of ions), has been dominated by liquids containing organic molecular cations. Although a few cases of all-inorganic ionic liquids are known, the field is relatively unexplored. As in the case of the organic cation salts, the inorganic ionic liquids can have aprotic, protic, and solvate cases, and can also be mixed with low melting alkali salts to give mixed alkali-molecular inorganic ionic liquid systems. Here we explore the interesting properties of (i) a low-melting alkali bromoaluminate, NaAl2Br7, which exhibits huge alkali cation decoupling in the crystalline state (such that there is very little change in conductivity on fusion) and (ii) its mixture with the low-melting inorganic ionic liquid [PBr4+][Al2Br7-]. The structures and ionicities are confirmed byWalden plots and by 31P and 27Al NMR spectroscopy.",

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AU - Tucker, T. G.

AU - Davidowski, S. K.

AU - Angell, Charles

PY - 2017

Y1 - 2017

N2 - The burgeoning field of ionic liquids (in the current sense of low-melting liquids (Tm < 100°C) consisting only of ions), has been dominated by liquids containing organic molecular cations. Although a few cases of all-inorganic ionic liquids are known, the field is relatively unexplored. As in the case of the organic cation salts, the inorganic ionic liquids can have aprotic, protic, and solvate cases, and can also be mixed with low melting alkali salts to give mixed alkali-molecular inorganic ionic liquid systems. Here we explore the interesting properties of (i) a low-melting alkali bromoaluminate, NaAl2Br7, which exhibits huge alkali cation decoupling in the crystalline state (such that there is very little change in conductivity on fusion) and (ii) its mixture with the low-melting inorganic ionic liquid [PBr4+][Al2Br7-]. The structures and ionicities are confirmed byWalden plots and by 31P and 27Al NMR spectroscopy.

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Inorganic vs organic cation ionic liquids and their solutions with alkali metal containing ionic liquids

Abstract

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