کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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171020 | 458429 | 2012 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: CoIILnIII dinuclear complexes (LnIII = Gd, Tb, Dy, Ho and Er) as platforms for 1,5-dicyanamide-bridged tetranuclear CoII2LnIII2 complexes: A magneto-structural and theoretical study CoIILnIII dinuclear complexes (LnIII = Gd, Tb, Dy, Ho and Er) as platforms for 1,5-dicyanamide-bridged tetranuclear CoII2LnIII2 complexes: A magneto-structural and theoretical study](/preview/png/171020.png)
Five acetate-diphenoxo triply-bridged CoII-LnIII complexes (LnIII = Gd, Tb, Dy, Ho, Er) of formula [Co(μ-L)(μ-Ac)Ln(NO3)2] and two diphenoxo doubly-bridged CoII-LnIII complexes (LnIII = Gd, Tb) of formula [Co(H2O)(μ-L)Ln(NO3)3]·S (S = H2O or MeOH), were prepared in one pot reaction from the compartmental ligand N,N′,N′′-trimethyl-N,N′′-bis(2-hydroxy-3-methoxy-5-methylbenzyl)diethylene triamine (H2L). The diphenoxo doubly-bridged CoII-LnIII complexes were used as platforms to obtain 1,5-dicyanamide-bridged tetranuclear CoII-LnIII complexes (LnIII = Gd, Tb, Dy, Ho, Er). All exhibit ferromagnetic interactions between the CoII and LnIII ions and in the case of the GdIII complexes, the JCoGd were estimated to be ∼+0.7 cm−1. Compound 3 exhibits slow relaxation of the magnetization.
Journal: Comptes Rendus Chimie - Volume 15, Issue 10, October 2012, Pages 878–888