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。
A two-spin complex{ [Zn( acac)_2]( NITQ)_2}·2CH_2Cl_2( 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 Zn^(2+)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.
出处
《应用化学》
CAS
CSCD
北大核心
2016年第12期1435-1440,共6页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目(21071006)~~
关键词
氮氧自由基
Zn(Ⅱ)
单晶结构
磁性
nitronyl nitroxide
Zn(Ⅱ)
crystal structure
magnetic properties