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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Valence-tautomeric ionic liquid composed of a cobalt bis(dioxolene) complex dianion
Yukihiro Yoshida1, Hirofusa Tanaka, Gunzi Saito
1Research Institute, Meijo University, Shiogamaguchi 1-501, Tempaku, Nagoya 468-8502, Japan. yyoshida@ccmfs.meijo-u.ac.jp
Abstract:
We successfully synthesized a room-temperature ionic liquid showing valence-tautomeric behavior, by combining a cobalt bis(dioxolene) complex dianion with a bulky trihexyl(tetradecyl)phosphonium cation. Its magnetic moment exhibits a gradual increase up to ca. 280 K through the glass transition (262 K) and then has an abrupt upturn at around 300 K. The valence-tautomeric behavior was confirmed by the temperature dependence of the electronic absorption spectra. This successful implementation allowed the "smart" ionic liquid, whose magnetic behavior responds evidently to temperature change.
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