Novel molecular staircases constructing from H-bonding interactions based on the building blocks of [Ni(mnt)2]- ions:: syntheses, crystal structures, EPR spectra and magnetic properties

被引:5
作者
Zhou, H.
Wen, L. L.
Ren, X. M. [1 ]
Meng, Q. J.
机构
[1] Hokkaido Univ, Res Inst Elect Sci, Lab Organ Conduct, Mat Field, Sapporo, Hokkaido 0600812, Japan
[2] Nanjing Xiaozhuang Coll, Dept Chem, Nanjing 210017, Peoples R China
[3] Nanjing Univ, Inst Coordinat Chem, Nanjing 210093, Peoples R China
[4] Nanjing Univ, State Key Lab, Nanjing 210093, Peoples R China
[5] Anqing Normal Coll, Dept Chem, Anqing 246011, Peoples R China
基金
中国国家自然科学基金;
关键词
bis(maleonitriledithiolato)nickelate compound; crystal structure; H-bonding interaction; EPR spectra; magnetic property;
D O I
10.1016/j.molstruc.2005.10.028
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Two new ion-pair compounds, consisting of 1-(4'-R-phenacyl)pyridinium derivatives and bis(maleonitriledithiolato)nickelate, have been synthesized and characterized structurally (R = NMe2 (1) and H (2)). In crystal 1, H-bonding interactions connecting the cations and anions lead a molecular staircase to form. The adjacent paramagnetic anions are effectively separated by nonmagnetic cations, and the magnetic behavior of I is nearly an isolated spin-system, which is supported by the results both EPR (which possesses the very narrow half-width at half-height of similar to 18 Gs) and temperature dependence of magnetic susceptibility. While the cations and anions arrange alternately layered structure in crystal 2. In an anionic layer, the neighboring dimers form an anionic chain via peripheral (SS)-S-... stacking interactions. The magnetic feature of 2 denotes the presence of antiferromagnetic interactions between the nearest-neighboring spins, but deviates from any dimer or alternating chain magnetic model. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:31 / 37
页数:7
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