title: A New Family of Anionic Fe(III) Spin Crossover Complexes Featuring a Weak-Field N2O4 Coordination Octahedron.
abstract: Unprecedented anionic Fe(III) spin crossover (SCO) complexes involving a weak-field O,N,O-tridentate ligand were discovered. The SCO transition was evidenced by the temperature variations in magnetic susceptibility, Mössbauer spectrum, and coordination structure. The DFT calculations suggested that larger coefficients on the azo group in the HOMO-1 of a ligand might contribute to the enhancement of a ligand-field splitting energy. The present anionic SCO complex also exhibited the light- induced excited-spin-state trapping effect.
authors.affiliation: Department of Chemistry, Kobe University, Rokkodai, Nada-ku, Kobe, 657-8501, Japan. ktaka@crystal.kobe-u.ac.jp.
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Takahashi
authors.affiliation: Department of Chemistry, Kobe University, Rokkodai, Nada-ku, Kobe, 657-8501, Japan.
authors.forename: Kiko
authors.initials: K
authors.lastname: Kawamukai
authors.affiliation: Department of Chemistry, Kobe University, Rokkodai, Nada-ku, Kobe, 657-8501, Japan.
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Okai
authors.affiliation: Department of Chemistry, Kobe University, Rokkodai, Nada-ku, Kobe, 657-8501, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Mochida
authors.affiliation: Center for Supports to Research and Education Activities, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Sakurai
authors.affiliation: Molecular Photoscience Research Center, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ohta
authors.affiliation: Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamamoto
authors.affiliation: Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan.
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Einaga
authors.affiliation: Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
authors.forename: Yoshihito
authors.initials: Y
authors.lastname: Shiota
authors.affiliation: Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
authors.forename: Kazunari
authors.initials: K
authors.lastname: Yoshizawa
keywords: anions; iron; photoinduced spin transition; spin crossover; weak-ligand field