TY - JOUR
T1 - Carbonate-bridged tetranuclear Ni II 2Gd III 2 complex generated by atmospheric CO 2 fixation
AU - Sakamoto, Soichiro
AU - Yamauchi, Suguru
AU - Hagiwara, Hiroaki
AU - Matsumoto, Naohide
AU - Sunatsuki, Yukinari
AU - Re, Nazzareno
PY - 2012/12/1
Y1 - 2012/12/1
N2 - Atmospheric CO 2 fixation by a basic reaction mixture of [Ni II(3-MeOsaltn)(H 2O) 2] and Gd III(NO 3) 3·6H 2O gave a carbonate-bridged tetranuclear Ni II 2Gd III 2 complex, (μ 4-CO 3) 2[Ni II(3-MeOsaltn)(MeOH)Gd III(NO 3)] 2·H 2O, where 3-MeOsaltn denotes N,N′-bis(3-methoxy-2-oxybenzylidene)-1,3-propanediaminato. The tetranuclear structure possessing an inversion center can be described as two [Ni IIGd III] binuclear units bridged by two carbonate CO 3 2 - ions: two oxygen atoms of the carbonate ion bridge the high-spin Ni II and Gd III ions of a binuclear unit and the remaining oxygen atom of the carbonate ion coordinates to a Gd III ion of the adjacent binuclear unit. The temperature-dependent magnetic susceptibilities, from 1.9 to 300 K, follow the Curie-Weiss equation of χ MT = C / (T - θ) with θ = + 2.3 K and C = 18.24 cm 3 K mol - 1, suggesting a ferromagnetic interaction. The magnetic data were well reproduced assuming two independent [Ni II-Gd III] binuclear units with the parameters of J(Ni-Gd) = + 1.2 cm - 1 and D = + 2.1 cm - 1.
AB - Atmospheric CO 2 fixation by a basic reaction mixture of [Ni II(3-MeOsaltn)(H 2O) 2] and Gd III(NO 3) 3·6H 2O gave a carbonate-bridged tetranuclear Ni II 2Gd III 2 complex, (μ 4-CO 3) 2[Ni II(3-MeOsaltn)(MeOH)Gd III(NO 3)] 2·H 2O, where 3-MeOsaltn denotes N,N′-bis(3-methoxy-2-oxybenzylidene)-1,3-propanediaminato. The tetranuclear structure possessing an inversion center can be described as two [Ni IIGd III] binuclear units bridged by two carbonate CO 3 2 - ions: two oxygen atoms of the carbonate ion bridge the high-spin Ni II and Gd III ions of a binuclear unit and the remaining oxygen atom of the carbonate ion coordinates to a Gd III ion of the adjacent binuclear unit. The temperature-dependent magnetic susceptibilities, from 1.9 to 300 K, follow the Curie-Weiss equation of χ MT = C / (T - θ) with θ = + 2.3 K and C = 18.24 cm 3 K mol - 1, suggesting a ferromagnetic interaction. The magnetic data were well reproduced assuming two independent [Ni II-Gd III] binuclear units with the parameters of J(Ni-Gd) = + 1.2 cm - 1 and D = + 2.1 cm - 1.
KW - 3d-4f complex
KW - CO fixation
KW - Carbonate-bridge
KW - Magnetic property
KW - Tetranuclear structure
UR - http://www.scopus.com/inward/record.url?scp=84867407180&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84867407180&partnerID=8YFLogxK
U2 - 10.1016/j.inoche.2012.08.022
DO - 10.1016/j.inoche.2012.08.022
M3 - Article
AN - SCOPUS:84867407180
SN - 1387-7003
VL - 26
SP - 20
EP - 23
JO - Inorganic Chemistry Communications
JF - Inorganic Chemistry Communications
ER -