TY - JOUR
T1 - Novel Fe(II) spin crossover complexes involving a chalcogen-bond and π-stacking interactions with a paramagnetic and nonmagnetic M(dmit)2 anion (M = Ni, Au; Dmit = 4,5-dithiolato-1,3-dithiole-2-thione)
AU - Okai, Mitsunobu
AU - Takahashi, Kazuyuki
AU - Sakurai, Takahiro
AU - Ohta, Hitoshi
AU - Yamamoto, Takashi
AU - Einaga, Yasuaki
N1 - Publisher Copyright:
© The Royal Society of Chemistry 2015.
PY - 2015/8/14
Y1 - 2015/8/14
N2 - To introduce both an inter-sulphur atom and π-stacking interaction between a spin crossover (SCO) cation and paramagnetic anion, we designed and synthesised two novel Fe(ii) SCO compounds involving a terpyridine-type thiazole containing ligand with the paramagnetic Ni(dmit)2 and nonmagnetic Au(dmit)2 anion (dmit = 4,5-dithiolato-1,3-dithiole-2-thione). The temperature variations of magnetic susceptibility and Mössbauer spectroscopy revealed that both complexes exhibited an almost complete SCO conversion, and moreover, the Ni(dmit)2 anion was in a paramagnetic state down to 2 K. The crystal structures for the Ni(dmit)2 complex at 213 and 400 K indicated that the chalcogen-bond and π-stacking interaction would be enhanced by the electrostatic interaction between the cation and anion, preventing the π-radicals from dimerising. The light-induced excited spin state trapping effect was observed at 5 K.
AB - To introduce both an inter-sulphur atom and π-stacking interaction between a spin crossover (SCO) cation and paramagnetic anion, we designed and synthesised two novel Fe(ii) SCO compounds involving a terpyridine-type thiazole containing ligand with the paramagnetic Ni(dmit)2 and nonmagnetic Au(dmit)2 anion (dmit = 4,5-dithiolato-1,3-dithiole-2-thione). The temperature variations of magnetic susceptibility and Mössbauer spectroscopy revealed that both complexes exhibited an almost complete SCO conversion, and moreover, the Ni(dmit)2 anion was in a paramagnetic state down to 2 K. The crystal structures for the Ni(dmit)2 complex at 213 and 400 K indicated that the chalcogen-bond and π-stacking interaction would be enhanced by the electrostatic interaction between the cation and anion, preventing the π-radicals from dimerising. The light-induced excited spin state trapping effect was observed at 5 K.
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U2 - 10.1039/c5tc00859j
DO - 10.1039/c5tc00859j
M3 - Article
AN - SCOPUS:84938149852
SN - 2050-7526
VL - 3
SP - 7858
EP - 7864
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 30
ER -