| 两种马来二腈基二硫烯镍(Ⅲ)近红外吸收配合物的结构、磁和电化学性质 |
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| 引用本文： | 周宏,于姗姗,段海宝,任小明. 两种马来二腈基二硫烯镍(Ⅲ)近红外吸收配合物的结构、磁和电化学性质[J]. 无机化学学报, 2013, 29(18) |
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| 作者姓名： | 周宏 于姗姗 段海宝 任小明 |
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| 作者单位： | 南京晓庄学院生物化工与环境工程学院, 南京 211171;南京晓庄学院生物化工与环境工程学院, 南京 211171;南京晓庄学院生物化工与环境工程学院, 南京 211171;南京工业大学应用化学系, 南京 210009 |
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| 基金项目： | 国家自然科学基金(No.21171097, 21201103)资助项目。 |
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| 摘 要： | 合成并表征了两种新的离子对化合物(BMIB)[(Ni(mnt)2]2 (1)和(BMIO)[(Ni(mnt)2)]2 (2)(其中mnt2-=马来二氰基二硫烯, BMIB=1, 4-bis(1-methylimidazolium)butane, BMIO=1, 8-bis(1-methylimidazolium)octane)。在化合物1中, [Ni(mnt)2]-阴离子排列形成阴离子三聚体以及与阳离子交替排列形成阴、阳离子混合柱。化合物2的堆积结构与化合物1不同, 阴、阳离子堆积成非等间距的阴、阳离子柱。化合物1和2分别在861和857 nm近红外波段处出现较强的近红外吸收。电化学性质研究结果表明, 2个化合物均出现了两对不可逆的电化学氧化/还原过程, 且平衡阳离子的烷基链长显著影响化合物的氧化、还原电极电势。变温磁化率测量表明, 在2~400 K温度范围内, 化合物1表现出弱的顺磁性质, 变温摩尔磁化率遵循简单的Curie-Weiss定律。化合物2表现出低维反铁磁交换自旋体系磁化率特征。
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| 关 键 词： | 离子对 晶体结构 磁性 近红外吸收 |
| 收稿时间： | 2012-08-06 |
| 修稿时间： | 2013-04-05 |
Crystal Structure, Magnetic, Near-infrared Absorption and Electrochemical Properties of Two [Ni(mnt)2]- Based Compounds |
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| ZHOU Hong,YU Shan-Shan,DUAN Hai-Bao and REN Xiao-Ming. Crystal Structure, Magnetic, Near-infrared Absorption and Electrochemical Properties of Two [Ni(mnt)2]- Based Compounds[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(18) |
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| Authors: | ZHOU Hong YU Shan-Shan DUAN Hai-Bao REN Xiao-Ming |
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| Affiliation: | School of Biochemical and Environmental Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China;School of Biochemical and Environmental Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China;School of Biochemical and Environmental Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China;College of Science, Nanjing University of Technology, Nanjing 210009, China |
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| Abstract: | Two ion-pair compounds with the formula of (BMIB)[(Ni(mnt)2]2 (1) and (BMIO)[(Ni(mnt)2]2 (2) (mnt=maleonitrile dithiolate, BMIB=1,4-bis(1-methylimidazolium)butane, BMIO=1,8-bis(1-methylimidazolium)octane) were synthesized and characterized structurally. In 1, the [Ni(mnt)2]- form a trimer anions and a mixed column, respectively. The packing structures of 2 are different from 1, the cations and the anions form the irregular alignments. Compound 1 and 2 show remarkable near-IR absorption behavior in the region of 861 and 857 nm respectively. The electrochemical behaviors in the solid state depend on the hydrocarbon chain length in the countercation moiety. Investigations of variable-temperature magnetic susceptibility indicated that 1 shows weak paramagnetic feature from 2 to 400 K; the magnetic susceptibility data were fit to the Curie-Weiss equation. 2 is a spin gap system but its magnetic behavior does not follow the Blaney-Bowers spin dimer model. |
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| Keywords: | ion-pair crystal structure magnetic near-infrared absorption |
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