A nitronyl nitroxide derivative, 2-phenylethynyl-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-oxide (1), and two verdazyl derivatives carrying a phenylacetylene unit, 1,5-diphenyl-3-phenylethynyl-6-oxo-1,2,4,5-tetrazin-2-yl (2) and 1,5-diisopropyl-3-phenylethynyl-6-oxo-1,2,4,5-tetrazin-2-yl (3), were synthesized and their packing structures were studied by X-ray crystallographic analysis and
A series of onedimensional chain complexes [Ln(hfac)3]2·[Cu(hfac)2]2·4(3pyvd)·n-C7H16 (Ln = Gd(1), Tb(2), Dy(3)) containing 2p, 3d and 4f spin carriers have been successfully synthesized and magnetically characterized where the verdazyl radicals represent the bridge linking copper(II) and lanthanide(III) ions. Rough estimation of magnetic behaviors of complex 1 revealed that the coupling between a
一系列一维链络合物[Ln(hfac)3 ] 2 ·[Cu(hfac)2 ] 2 ·4(3pyvd)· n -C 7 H 16(Ln = Gd(1),Tb(2),Dy (3)包含2p,3d和4f自旋载体的合成已成功完成并进行了磁学表征,其中的Verdazyl自由基代表连接铜(II)和镧系元素(III)离子的桥。对配合物1的磁行为的粗略估计表明,Gd(III离子和自由基是弱铁磁性的,而配合物2和3的交流磁化率表明在低温下不存在缓慢的磁弛豫。
Versatile synthesis of chiral 6-oxoverdazyl radical ligands – new building blocks for multifunctional molecule-based magnets
作者:Atena B. Solea、Tobie Wohlhauser、Parisa Abbasi、Yvan Mongbanziama、Aurelien Crochet、Katharina M. Fromm、Ghenadie Novitchi、Cyrille Train、Melanie Pilkington、Olimpia Mamula
DOI:10.1039/c8dt00840j
日期:——
A versatile synthetic methodology to access the first family of chiral verdazyl N,N′-chelate ligands is described and exemplified by N,N′-dimethyl-, N,N′-di-isopropyl- and N,N′-diphenyl oxoverdazyls bearing two isomers of the pinene-pyridine functional group. Their physical properties were probed by X-band EPR spectroscopy, cyclic voltammetry and DFT calculations. Preliminary reactivity studies show