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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Two-dimensional Co-Ln networks bridged by phenyl pyrimidyl substituted nitronyl nitroxides: structural and magnetic properties
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Two-dimensional Co-Ln networks bridged by phenyl pyrimidyl substituted nitronyl nitroxides: structural and magnetic properties

机译:由苯基嘧啶基取代的硝基氮氧化氮氧化物桥接的二维CO-LN网络:结构和磁性

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摘要

Two-dimensional hetero-tri-spin 2p-3d-4f coordination polymers involving Co(ii) and Ln(iii) ions assembled with a polydentate paramagnetic nitronyl nitroxide ligand are reported. [Ln(hfac)(3){Co(hfac)(2)}(2)(NITPhPyrim)(2)] (Ln(III) = Gd 1, Tb 2; hfac = hexafluoroacetylacetonate, NITPhPyrim = 2-[4-(5-pyrimidyl)phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) consists of a two-dimensional network in which the NITPhPyrim ligand is coordinated to the metal ions by means of its pyrimidine and aminoxyl (NO) groups. In the layer, the Tb center interacts with two NO groups from two different radical ligands, and each pyrimidine connects two Co(hfac)(2) units through its two nitrogen atoms to form one-dimensional Co(ii) arrays. The magnetic behavior of the two compounds results from concomitant ferro- and antiferromagnetic interactions between the spin carriers and the spin-orbit effect from Co(ii) as revealed by modeling performed for the Gd(iii) derivative.
机译:涉及与多晶体顺磁硝基氮氧化物配体组装的CO(II)和LN(III)离子的二维异质三旋旋转2P-3D-4F配位聚合物。 [LN(HFAC)(3){CO(HFAC)(2)}(2)(2)(2)(1)(1N)(1)(III)= Gd 1,Tb 2; Hfac =六氟乙酰丙酮,Nitphpyrim = 2- [4- (5-嘧啶)苯基] -4,4,5,5-四甲基咪唑啉-1-氧基-3-氧化物)包括通过其嘧啶和嘧啶和嘧啶与金属离子配位的二维网络 氨基氧基(NO)组。 在该层中,TB中心与来自两种不同的自由基配体的两组相互作用,并且每个嘧啶通过其两个氮原子连接两种CO(HFAC)(2)单元以形成一维CO(II)阵列。 两种化合物的磁性是由旋转载体与旋硅和反铁磁性相互作用之间的旋转铁磁性相互作用以及通过对Gd(III)衍生物进行的建模揭示的Co(II)之间的旋硅效应。

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