Electron spin resonance studies of iron(<scp>III</scp>) complexes of ethylenediaminetetra-acetate and N-(2-hydroxyethyl)ethylenediamine-NN′N′-triacetate in co-ordinating solvents
作者:Catharina T. Migita、Kotaro Ogura、Takashi Yoshino
DOI:10.1039/dt9850001077
日期:——
Remarkable solvent dependence of the apparent peak-to-peak linewidth (ΔHpp) has been observed for the rhombic type of e.s.r. spectra of the high-spin FeIII(edta)(edta = ethylenediaminetetra-acetate) and FeIII(hedta)[hedta =N-(2-hydroxyethyl)ethylenediamine-NN′N′-triacetate] complexes in a series of co-ordinating solvents. Moreover, the order of the solvents which gave the characteristic ΔHpp for each
对于高自旋Fe III(edta)(edta =乙二胺四乙酸盐)和Fe III(hedta)的菱形esr光谱,观察到明显的峰-峰线宽(ΔH pp)溶剂依赖性。[HEDTA = ñ - (2-羟乙基)乙二胺NN ' ñ '-triacetate]在一系列协调溶剂的复合物。此外,对于两种配合物体系,给出每种配合物特征ΔH pp的溶剂顺序是不同的:即H 2 O二甲基亚砜(dmso)> NN-二甲基甲酰胺(dmf)> CH 3OH为铁III(EDTA)和H 2 O> CH 3 OH> DMF DMSO表示的Fe III(HEDTA)。对于相同系列的铁(III)配合物-溶剂系统,也观察到了与d - d跃迁相对应的能带最大值(λmax。)的溶剂依赖性。所得的值对溶剂的敏感性低于ΔH pp值。在这种情况下,溶剂依赖性为λmax。Fe III(edta)和Fe III(hedta)的相似:λmax。对于H