Relationship between the Thermally Induced Reorientations of Aromatic Solvate Molecules in Cu(hfac)<sub>2</sub>–Nitroxide Breathing Crystals and the Character of the Magnetic Anomaly
作者:Galina V. Romanenko、Ksenia Yu. Maryunina、Artem S. Bogomyakov、Renad Z. Sagdeev、Victor I. Ovcharenko
DOI:10.1021/ic200444e
日期:2011.7.18
A new group of “breathing” crystals has been synthesized. These are aromatic solvates of the copper(II) hexafluoroacetylacetonate complex with spin-labeled pyrazole Cu(hfac)2L·0.5Solv, where L is 2-(1-butyl-1H-pyrazol-4-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl and Solv is benzene, toluene, ethylbenzene, propylbenzene, butylbenzene, styrene, o-xylene, m-xylene, p-xylene, 1,4-
合成了一组新的“呼吸”晶体。它们是六氟乙酰丙酮化铜(II)与旋转标记的吡唑Cu(hfac)2 L·0.5Solv的芳族溶剂化物,其中L为2-(1-丁基-1 H-吡唑-4-基)-4,4 ,5,5-四甲基-4,5-二氢- 1 ħ咪唑-3-氧化物-1-氧基和SOLV是苯,甲苯,乙苯,丙苯,丁苯,苯乙烯,ö二甲苯,米二甲苯,p -二甲苯,1,4-双(三氟甲基)苯,1-甲基-4-乙基苯,1-甲基-4-乙烯基苯,1,4-二乙基苯,1,2,3-三甲基苯或1,2,4-三甲基苯。Cu(hfac)2的主要特征L·0.5Solv单晶具有出色的机械稳定性和经受热诱导的结构重排并伴有类似自旋交叉现象的能力。Cu(hfac)2 L·0.5Solv溶剂化物的结构相似,并基于具有“头对头”基序的相互平行的Cu(hfac)2 L} ∞异旋链。与客体分子是在所有的晶体相同的空隙的定位,有效磁矩(μ的温度依赖性EFF)对Cu(HFAC)2