Reversible light-induced magnetization change in an azobenzene-attached pyridylbenzimidazole complex of iron(II) at room temperature.
Reversible photomagnetic effects were demonstrated at room temperature by the use of a new iron(II) complex t100c0-[Fe()3](BF4)(2).3H2O ( =phenyl(2-pyridin-2-yl-3H-benzoimidazol-5-yl)diazene), based on the strategy of the so-called "ligand-driven light-induced spin change" (LD-LISC) effect. The complex showed thermal spin crossover in both solid and solution states, showing a transition temperature T1/2=279(16) K in acetone. trans-cis Photoisomerization of azobenzene moieties using different energy lights afforded reversible photomagnetic effects, which were directly determined using the Evans 1H NMR method.
Hasegawa
Yuta
Y
Department of Chemistry, School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyoku, Tokyo 113-0033, Japan.
Kume
Shoko
S
Nishihara
Hiroshi
H