Crystal structures and magnetic properties of [Ni(dmit)2]- salts including (4-fluoroanilinium)([18]crown-6) and (4-methylanilinium)([18]crown-6) supramolecular cations
Crystal structures and magnetic properties of [Ni(dmit)2]- salts including (4-fluoroanilinium)([18]crown-6) and (4-methylanilinium)([18]crown-6) supramolecular cations
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DOI：
10.1016/j.poly.2005.03.163
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发表时间：
2005-11
期刊：
影响因子：
2.6
通讯作者：
S. Nishihara;X. Ren;T. Akutagawa;Takayoshi Nakamura
中科院分区：
文献类型：
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作者：
S. Nishihara;X. Ren;T. Akutagawa;Takayoshi Nakamura
将新的超分子阳离子结构（4-氟苯胺）（[18]冠-6）和（4-甲基苯胺）（[18]冠-6）作为对抗阳离子引入具有S=1/2自旋的[Ni(dmit)2]−盐中，形成磁性晶体。从晶体结构和随温度变化的磁化率来看，两种盐均具有沿b轴一维排列的[Ni(dmit)2]−π-二聚体的同构结构。这些盐的磁性基态为自旋单重态，内部磁交换能在−150K左右。
New supramolecular cation structures of (4-fluoroanilinium)([18]crown-6) and (4-methylanilinium)([18]crown-6) were introduced as counter cations to [Ni(dmit)2]−salts, which bear an S=1/2 spin, to form magnetic crystals. From the crystal structures and temperature dependent magnetic susceptibilities, both salts had isomorphous structure of one-dimensional arrangements of [Ni(dmit)2]−π-dimer along the b-axis. The magnetic ground state of these salts was spin singlet with the intradimer magnetic exchange energy of around −150K.