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A New Family of Anionic Fe III Spin Crossover Complexes Featuring a Weak‐Field N 2 O 4 Coordination Octahedron
Author(s) -
Takahashi Kazuyuki,
Kawamukai Kiko,
Okai Mitsunobu,
Mochida Tomoyuki,
Sakurai Takahiro,
Ohta Hitoshi,
Yamamoto Takashi,
Einaga Yasuaki,
Shiota Yoshihito,
Yoshizawa Kazunari
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201504883
Subject(s) - spin crossover , ligand field theory , octahedron , ligand (biochemistry) , crystallography , chemistry , excited state , spin states , spin transition , mössbauer spectroscopy , spin (aerodynamics) , inorganic chemistry , ion , atomic physics , physics , crystal structure , biochemistry , receptor , organic chemistry , thermodynamics
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.