学術雑誌論文 Thermochromic Magnetic Ionic Liquids from Cationic Nickel(II) Complexes Exhibiting Intramolecular Coordination Equilibrium

Lan, Xue  ,  Mochida, Tomoyuki  ,  Funasako, Yusuke  ,  Takahashi, Kazuyuki  ,  Sakurai, Takahiro  ,  Ohta, Hitoshi

23 ( 4 )  , pp.823 - 831 , 2017-01 , Wiley
ISSN:0947653915213765
内容記述
Among the various thermochromic materials, liquid thermochromic materials are comparatively rare. To produce functional thermochromic liquids, we have designed ionic liquids based on cationic nickel complexes with ether side chains, [Ni(acac)((Me2NC2H4NRR2)-R-1)]Tf2N ([1]Tf2N: R-1 = C3H6OEt, R-2 = Me; [2]Tf2N: R-1 = C3H6OMe, R-2 = Me; [3]Tf2N: R-1 = R-2 = C3H6OMe), where acac = acetylacetonate and Tf2N=(F3CSO2)(2)N-. The side chains (R-1, R-2) can moderately coordinate to the metal center, enabling temperature-dependent coordination equilibria in the liquid state. [1]Tf2N is a liquid at room temperature. [2]Tf2N is obtained as a solid (T-m=352.7 K) but remains liquid at room temperature after melting. [3]Tf2N is a solid with a high melting point (T-m=422.3 K). These salts display thermochromism in the liquid state, appearing red at high temperatures and orange, light-blue, or bluish-green at lower temperatures, and exhibiting concomitant changes in their magnetic properties. This phenomenon is based on temperature-dependent equilibrium between a square-planar diamagnetic species and a paramagnetic species with intramolecular ether coordination.
本文を読む

http://www.lib.kobe-u.ac.jp/repository/90004157.pdf

このアイテムのアクセス数:  回

その他の情報