New mixed-ligand 8-hydroxyquinolinato iron(III) complexes of dimethylethylenediamine-based aminophenol ligands

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• 作者：Elham Safaei^a ; ^b ; ^{e.safaei@shirazu.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; Narges Naghdi^b ; Andrzej Wojtczak^c ; Zvonko Jagličić^d
• 关键词：Bis(phenol) di-amine ; 8-Hydroxyquinoline ; Tripodal ligands ; Enzyme models ; Enzyme-substrate
• 刊名：Polyhedron
• 出版年：2016
• 出版时间：18 April 2016
• 年：2016
• 卷：109
• 期：Complete
• 页码：190-198
• 全文大小：1926 K

文摘

Four new mixed ligand iron(III) complexes of N,N′-dimethylethylenediamine based bis(phenol) di-amine (H₂L^NER) and 8-hydroxyquinoline (HQ) ligands have been synthesized and characterized by spectroscopic methods, X-ray diffraction, magnetic susceptibility measurements and cyclic voltammetry techniques. X-ray structure analysis revealed iron complexes with monoclinic or triclinic structures in which the H₂L^NEX and HQ ligands are coordinated to the Fe(III) center. The variable temperature magnetic susceptibility indicated a paramagnetic iron(III) center in the complexes. Electrochemical studies of the complexes with cyclic voltammetry showed cathodic peaks corresponding to an Fe^III to Fe^II reduction. An anodic peak was found that corresponded to phenolate ligand oxidation to phenoxyl radicals in the positive potential regions. To the best of our knowledge, synthesis reports on mixed-ligand 8-hydroxyquinolinato iron(III) complexes are very rare.