They were converted to the phenoxyl radicals upon oxidation with Ce(IV), giving a phenoxyl radical pi-pi transition band at 394-407 nm. ESR spectra at low temperature and resonance Raman spectra established that the radical species has a Ni(II)-phenoxyl radical bond. The cyclic voltammograms showed a quasi-reversible redox wave at E1/2=0.46-0.56 V (vs Ag/AgCl) corresponding to the formation of the phenoxyl
N3O-供体三脚架
配体,2,4-二叔丁基-6-[[[[(双(2-
吡啶基)甲基]
氨基)甲基]
苯酚(HtbuL),2,4-二-叔丁基-6-[([((6-甲基-2-
吡啶基)甲基](2-
吡啶基甲基)
氨基)甲基] p
苯酚(HtbuLMepy)和2,4-二叔丁基-6-[(制备[双(6-甲基-2-
吡啶基)甲基]
氨基)甲基]
苯酚(HtbuL(Mepy)2),和[Ni(tbuL)Cl(
H2O)](1),[Ni(tbuLMepy)Cl用X射线衍射法对](2)和[Ni(tbuL(Mepy)2)Cl](3)进行结构表征。配合物1和3具有带配位
酚酸酯部分的单核结构,而配合物2具有由两个
氯离子桥接的双核结构。发现Ni(II)中心的几何形状对于1和2为八面体,对于3为5坐标三角双锥体。配合物1-3在CH3CN中表现出相似的吸收光谱,表明它们在溶液中都具有单核结构。它们在用Ce(IV)氧化后转化为苯氧基,在394-407