期刊文献+

氮氧自由基-镝配合物的合成、晶体结构和磁性研究

Synthesis,Crystal Structure and Magnetic Properties of Dy(Ⅲ) Complex with Nitronyl Nitroxide Radicals
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摘要 合成了新的稀土配合物Dy(hfac)3[NITPhp-OCH2CH=CH2]2(其中NITPhp-OCH2CH=CH2为2-(4′-烯丙氧基苯基)-4,4,5,5-四甲基咪唑啉-3-氧化-1-氧基自由基).单晶X-射线衍射分析结果显示,该化合物属三斜晶系,P-1空间群,晶胞参数a=1.241 8(4)nm,b=1.428 8(5)nm,c=1.750 5(5)nm,其中每个Dy(Ⅲ)离子采取八配位的模式,2个氮氧自由基作为单齿端基配体分别以氮氧基团的氧原子与Dy(Ⅲ)离子配位,3个六氟乙酰丙酮阴离子分别以2个氧原子与Dy(Ⅲ)离子配位,构成十二面体.配合物的变温磁化率研究表明,配合物中Dy(Ⅲ)离子和氮氧自由基之间存在弱的反铁磁相互作用. A novel complex Dy (hfac)3 [-NITPhp-OCH2CH = CH2-]2 (where NITPhpOCH2CH =CH2 is 2- (4'-alloxylphenyl)-4,4, 5,5-tetramethylimidazoline-l-oxyl-3-oxide ) was synthesized and characterized structurally and magnetically. It crystallizes in triclinic, space groupP-1, witha=1. 2418(4) nm,b:l. 428 8(5) nm, c=1.750 5(5) nm. EachDy( Ⅲ) ion is coordinated by two oxygen atoms from two different radicals NITPhp-OCH2CH : CH2 and six oxygen atoms from three different hfac anions to form eight-coordinated dodecahedron geometry. The variable magnetic measurement shows that there is weak antiferromagnetic interaction between Dy( Ⅲ) ion and two NITPhp-OCH2CH=CH2 radicals.
出处 《南开大学学报(自然科学版)》 CAS CSCD 北大核心 2012年第2期105-109,共5页 Acta Scientiarum Naturalium Universitatis Nankaiensis
基金 国家自然科学基金(20771081)
关键词 氮氧自由基配合物 Dy(Ⅲ) 晶体结构 磁性 nitroxide radical complex Dy( Ⅲ) crystal structure magnetic properties
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