| [M(phen)3][Ni(mnt)2](M2+=Ni2+，Fe2+；phen=1，10-菲咯啉，mnt2-=马来二腈二硫烯)离子对配合物的合成、晶体结构、电子光谱和磁性质(英文) |
| Syntheses, Crystal Structures, Electronic Spectra and Magnetic Properties for New Ion-Pair Complexes of [M(phen)3][Ni(mnt)2] (M2+=Ni2+, Fe2+; phen=1,10-phenathroline, mnt2-=maleonitriledithiolate) |
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| 摘要: 本文制备了2种新的离子对配合物[M(phen)3][Ni(mnt)2](phen=1，10-菲咯啉，mnt2-=马来二腈二硫烯；M2+=Ni2+，1；Fe2+，2)，并进行了结构表征。2种离子对配合物晶体的空间群都为P21/n，具有类似的晶胞参数和堆积结构。紫外可见-近红外光谱显示在近红外区域没有出现明显的吸收峰。在2到400 K的温度范围内，化合物1表现居里-外斯型的顺磁性行为，并在磁性[Ni(phen)3]2+离子之间存在弱的反铁磁作用，而且在八面体配位环境下Ni2+离子自旋基态S=1。化合物2在40 K向上显示抗磁性，意味[Fe(phen)3]2+离子处于低自旋态。低于40 K时，弱居里尾巴可能是由于小部分顺磁性[Ni(mnt)2]-杂质导致的。 |
| 关键词: 双-(马来二腈二硫烯)镍配合物 晶体结构 电子光谱 磁性质 |
| 基金项目: |
| Abstract: Two new bimetallic ion-pair compounds, [M(phen)3][Ni(mnt)2] (phen=1,10-phenanthroline, mnt2-=maleonitriledithiolate; M=Ni2+, 1; Fe2+, 2), have been prepared and characterized structurally. Two ion-pair crystals, crystallizing in monoclinic space group P21/n, have quite similar cell parameters and packing structures, and two compounds do not show the absorption in the near-IR region. Compound 1 exhibits the Curie-Weiss-type paramagnetic behavior in the temperature range 2~400 K and the existence of weakly antiferromagnetic coupling between magnetic [Ni(phen)3]2+ ions and the Ni2+ ion in the octahedral coordination sphere has an S=1 ground state. While 2 displays the diamagnetic behavior above ~40 K with a weak Curie-Weiss type paramagnetic tail below 40 K, indicated the Fe2+ center in the [Fe(phen)3]2+ ion having a low-spin state. The weak paramagnetic behavior in the low-temperature region results from a trace amount of [Ni(mnt)2]- species. CCDC: 860552, 1; 860551, 2. |
| Keywords: bis(maleonitriledithiolate)nickelate crystal structure electronic spectra magnetic property |
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| 陈选荣,盛小利,袁国军,任小明.[M(phen)3][Ni(mnt)2](M2+=Ni2+，Fe2+；phen=1，10-菲咯啉，mnt2-=马来二腈二硫烯)离子对配合物的合成、晶体结构、电子光谱和磁性质(英文)[J].无机化学学报,2012,28(9):1919-1925. |
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