Water‐Induced Breaking of the Coulombic Ordering in aRoom‐Temperature Ionic Liquid Metal Complex

Control of ion arrangements in ionic liquids represents a major challenge owing to the presence of the predominant coulombic interactions between cationic and anionic ion species that forms the coulombic ordering. Here, water‐induced ion rearrangement in a room‐temperature ionic liquid (RT‐IL) metal...

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Bibliographic Details
Published in:Chemistry : a European journal 2019-06, Vol.25 (31), p.7521-7525
Main Authors: Hiraoka, Tomoaki, Ohtani, Ryo, Nakamura, Masaaki, Lindoy, Leonard F, Hayami, Shinya
Format: Article
Language:English
Subjects:
Anions
Cationic polymerization
Chemistry
Coordination compounds
Coordination polymers
Cyanides
Ionic liquids
Ions
Liquid metals
Metals
Polymers
Solidification
Temperature
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Summary:Control of ion arrangements in ionic liquids represents a major challenge owing to the presence of the predominant coulombic interactions between cationic and anionic ion species that forms the coulombic ordering. Here, water‐induced ion rearrangement in a room‐temperature ionic liquid (RT‐IL) metal complex, (1‐ethyl‐3‐methylimidazolium)2[MnN(CN)4], is demonstrated through coordinative interactions between anions. Solidification occurred, which was associated with the formation of a “separated” structure consisting of cation columns and anionic cyanide‐bridged one‐dimensional coordination polymers. The energy diagram is in accord with the resultant RT‐IL incorporating mononuclear [MnN(CN)4]2− molecules being a kinetic phase stabilized by inter‐ion repulsions of the anionic divalent metal complex moieties. Water acts to decrease the coulombic interactions, including repulsion, giving rise to breaking of the coulombic ordering arising from coordination bond formation in the IL phase.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201900069