喹喔啉氮氧自由基-Zn(Ⅱ)配合物的合成、结构和磁性质

doi:10.11944/j.issn.1000-0518.2016.12.160073

摘要/Abstract

摘要：

采用喹喔啉基取代的氮氧自由基NITQ与锌(Ⅱ)离子进行配位,得到了1个单核的双自旋配合物[Zn(acac)₂(NITQ)₂]·2CH₂Cl₂(其中acac=乙酰丙酮阴离子,NITQ=2-(2'-喹喔啉基)-4,4,5,5-四甲基咪唑啉-3-氧化-1-氧基自由基)。 X射线单晶衍射分析结果表明,两个NITQ自由基作为单齿配体分别与Zn(acac)₂配位,形成八面体构型的双自旋配合物。变温磁化率研究表明,NITQ自由基间存在铁磁相互作用,其居里常数C=0.7242 cm³·K/mol,外斯常数θ=0.5958 K。

关键词: 氮氧自由基, Zn(Ⅱ), 单晶结构, 磁性

Abstract:

A two-spin complex{[Zn(acac)₂](NITQ)₂}·2CH₂Cl₂(acac=acetylaceonate anion, NITQ=2-(2-quinoxalinyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) was synthesized from a quinoxalinyl substituted nitroxide radical. The X-ray analysis of the single crystal reveals that two NITQ radicals act as monodentate ligands coordinated to Zn²⁺ to form a two-spin octahedral complex. The magnetic study shows that two NITQ radicals have ferromagnetic interaction, the Curie constant C=0.7242 cm³·K/mol and Weiss constant θ=0.5958 K.

Key words: nitronyl nitroxide, Zn(Ⅱ), crystal structure, magnetic properties

张有娟, 杨金慧, 陈静. 喹喔啉氮氧自由基-Zn(Ⅱ)配合物的合成、结构和磁性质[J]. 应用化学, 2016, 33(12): 1435-1440.

ZHANG Youjuan, YANG Jinhui, CHEN Jing. Synthesis, Crystal Structure and Magnetic Properties of a Zinc(Ⅱ) Complex with Quinoxaline-substituted Nitronyl Nitroxide Radicals[J]. Chinese Journal of Applied Chemistry, 2016, 33(12): 1435-1440.

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