TY - JOUR
T1 - Molecular spin ladders self-assembly from [Ni(dmit)2] - building blocks
T2 - Syntheses, structures and magnetic properties
AU - Chen, Youcun
AU - Liu, Guangxiang
AU - Song, You
AU - Xu, Heng
AU - Ren, Xiaoming
AU - Meng, Qingjin
PY - 2005/11/17
Y1 - 2005/11/17
N2 - Two ion-pair compounds, consisting of 1-(4′-R-benzyl)pyridinium ([RBzPy]+, R = NO2 (1) and Br (2)) and [Ni(dmit) 2]- (dmit2- = 2-thioxo-1,3-dithion-4,5- dithiolato), have been synthesized and structurally characterized. The anions of [Ni(dmit)2]- stack into dimers, which further construct into two-leg ladder through terminal S⋯S interactions in 1, lateral S⋯S interactions in 2. The weak H-bonding interactions of C-H⋯S were observed in 2, while only weak van de Waals interactions between anion and cations in 1. The magnetic susceptibilities measured in 2-300 K indicate AFM exchange interaction domination both two compounds. A peculiar magnetic transition at ∼100 K was observed in 1. An AFM ordering below ∼11 K was found in 2, and the best fit to magnetic susceptibility above 45 K in this compound, using a dimer model with s = 1/2, give rise to Δ/kB = 36.1 K, zJ = -0.91 K, C = 3.2 × 10-3 emu K mol-1 and χ0 = -4.0 × 10-6 emu mol-1 with g of 2.0 fixed.
AB - Two ion-pair compounds, consisting of 1-(4′-R-benzyl)pyridinium ([RBzPy]+, R = NO2 (1) and Br (2)) and [Ni(dmit) 2]- (dmit2- = 2-thioxo-1,3-dithion-4,5- dithiolato), have been synthesized and structurally characterized. The anions of [Ni(dmit)2]- stack into dimers, which further construct into two-leg ladder through terminal S⋯S interactions in 1, lateral S⋯S interactions in 2. The weak H-bonding interactions of C-H⋯S were observed in 2, while only weak van de Waals interactions between anion and cations in 1. The magnetic susceptibilities measured in 2-300 K indicate AFM exchange interaction domination both two compounds. A peculiar magnetic transition at ∼100 K was observed in 1. An AFM ordering below ∼11 K was found in 2, and the best fit to magnetic susceptibility above 45 K in this compound, using a dimer model with s = 1/2, give rise to Δ/kB = 36.1 K, zJ = -0.91 K, C = 3.2 × 10-3 emu K mol-1 and χ0 = -4.0 × 10-6 emu mol-1 with g of 2.0 fixed.
KW - Bis(2-thioxo-1,3-dithion-4,5-dithiolato)nickelate compound
KW - Crystal structure
KW - Magnetic property
KW - Spin ladder
UR - http://www.scopus.com/inward/record.url?scp=27644521387&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2005.03.082
DO - 10.1016/j.poly.2005.03.082
M3 - 文章
AN - SCOPUS:27644521387
SN - 0277-5387
VL - 24
SP - 2269
EP - 2273
JO - Polyhedron
JF - Polyhedron
IS - 16-17
ER -