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由于其潜在的多功能的应用,以分子为基础的磁性材料引起了广泛的关注.利用3d六氰金属化合物已成功地合成了一系列的分子磁体.我们一直在研究和开发一些顺磁性的三价的钌和锇的金属氰化物:例如,trans-[RuIII(acac)(CN)2]-,trans-[MIII(salen)(CN)2]-(M=RuorOs)和[RuIII(CN-sap)(CN)3]2-,并以此来用作磁性材料的建筑模块.在本文中,我们报道一系列的带有三齿希夫碱配体的三氰根铁(III)配合物的合成及表征.在THF,FeCl2·4H2O和5-取代的sapH2反应一天生成红褐色固体[FeIII(5-Xsap)(THF)2Cl](1a～1e).这些化合物的红外光谱都在1600cm-1显示了ν(C=N)吸收.5-位上的取代基团对此吸收没有明显的影响.然而与sapH2配体相比较,这些ν(C=N)吸收向低波数移动了30cm-1.在MeOH,化合物1a的质谱在m/z=267显示了一个最显著的峰.这个峰被指认为[FeIII(sap)]+(源于母体离子在离子化的过程中减除两个THF和一个Cl).实验与模拟的同位素分布图是非常一致的.化合物1b～1e的质谱图与1a相似.化合物1a～1e在室温下的磁矩在6.02～6.12μB范围内(Gouy方法,固样),这意味着这些铁化合物都是高自旋态的有5个单电子.在H2O中,化合物[FeIII(5-Xsap)(THF)2Cl](X=H,Me,OMe,Cl或Br)与过量的KCN反应生成一系列三氰铁(III)化物,[FeIII(5-Xsap)(CN)3]2-.这些化合物都以PPh4+盐的形式2a～2e分离出来(70%产率).这些化合物的红外光谱在2102～2106cm-1的范围内显示了ν(C≡N)吸收.与未配位的氰根相比较(2080cm-1),这些ν(C≡N)吸收都移向了高波数.但是,这个值又低于[(Tp)FeIII(CN)3]-(νCN=2123cm-1).在CH3CN,化合物2a的质谱显示了一个单一的峰(m/z=319).这个峰被指认为[Fe(sap)(CN)2]-(源于母体离子在离子化的过程中减除一个CN-).实验与模拟的同位素分布图是非常一致的.化合物1b～1e的质谱图与1a相似.在这些化合物的质谱中,都没有观察到相应的母体离子[Fe(5-Xsap)(CN)3]2-的峰.然而,在CH3CN中测量的这些化合物的摩尔电导率在232～240Ω-1·cm2·mol-1范围内.这意味着这些化合物是2:1的电解质,与在溶液中[Fe(5-Xsap)(CN)3]2-为二价的阴离子一致.此2:1的结构构型进一步通过XRD得到确认.化合物2a～2e在293K的磁矩在2.10～2.20μB范围内(Gouy方法,固样),符合低自旋态的d5化合物.这说明通过氰根的配位,这些铁(III)化合物都从高自旋转变为低自旋态.
Due to its potential versatility, molecular-based magnetic materials have drawn much attention. A series of molecular magnets have been successfully synthesized using 3d hexacyanide compounds. We have been researching and developing some paramagnetic tri Valences of metal cyanides of ruthenium and osmium: for example, trans- [RuIII (acac) (CN) 2] -, trans- [MIII (salen) (CN) 2] - (M = RuorOs) sap) (CN) 3] 2-, and as a building block for magnetic materials.In this paper, we report that a series of complexes of triclosan iron (III) complexes with tridentate Schiff base ligands Syntheses and characterization of the reddish-brown solid [FeIII (5-Xsap) (THF) 2Cl] (1a ~ 1e) in THF, FeCl2 · 4H2O and 5-substituted sapH2 at 1 day.The infrared spectra of these compounds are all in the range of 1600cm-1 (C = N) absorption showed no significant effect on the absorption at the 5-position However, these ν (C = N) absorption shifted towards low wavenumbers by 30 cm -1 as compared to the sapH2 ligand . In MeOH, the mass spectrum of compound 1a shows one of the most prominent peaks at m / z = 267. This peak is designated as [FeIII (sap)] + (due to the parent ion subtracting two THFs during ionization And a Cl). Experiment and simulation The isotope patterns of compounds 1b to 1e are similar to 1a.The magnetic moments of compounds 1a to 1e at room temperature ranged from 6.02 to 6.12μB (Gouy method, solid sample), which means that the iron The compound has 5 single electrons in the high spin state and the compound [FeIII (5-Xsap) (THF) 2Cl] (X = H, Me, OMe, Cl or Br) reacts with an excess of KCN in H2O to produce a series of (III), [FeIII (5-Xsap) (CN) 3] 2- These compounds were all isolated as PPh 4 + salts in the form of 2a to 2e (70% yield). The IR spectra of these compounds are at 2102 The absorption of ν (C≡N) is shown in the range of ~2106 cm-1, and the absorption of these ν (C≡N) shifts to higher wave numbers than the uncoordinated cyanide (2080 cm -1). However, this The mass spectrum of compound 2a showed a single peak (m / z = 319) at CH3CN. This peak was designated as [(Tp) FeIII (CN) 3] - (vCN = 2123 cm- Fe (sap) (CN) 2] - (derived from the parent ion minus one CN- during ionization). The experimental and simulated isotope patterns are very consistent. The spectra of compounds 1b-1e are similar to 1a In the mass spectra of these compounds, no corresponding parent ion [Fe ( 5-Xsap) (CN) 3] 2- However, the molar conductivities of these compounds measured in CH 3 CN ranged from 232 to 240 Ω-1 · cm 2 · mol -1, which means that these compounds are 2: 1 was consistent with the divalent anions of [Fe (5-Xsap) (CN) 3] 2- in solution.The structure configuration of 2: 1 was further confirmed by XRD.Compounds 2a ~ 2e were eluted at 293K The magnetic moments are in the range of 2.10 ~ 2.20μB (Gouy method, solid sample), which is in line with d5 compounds with low spin states, indicating that these iron (III) compounds transition from high spin to low spin states .