Preparation and physico-chemical properties of lanthanide(III) complexes with 2-((E)- (tert- butylimino)methyl)-6-methoxyphenol

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-09-19 DOI:10.4314/bcse.v37i6.8

Kwakhanya Mkwakwi, Eric Hosten, Richard Betz, Abubak’r Abrahams, Tatenda Madanhire

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Abstract

ABSTRACT. The reactions of lanthanide nitrates with 2-((E)-(tert-butylimino)methyl)-6-methoxyphenol (HL1) have yielded five complexes that are described by the formulae [Ce(HL1)2(NO3)3]∙MeOH and [Ln(HL1)2(NO3)3] (Ln = Nd(III), Gd(III), Ho(III) and Er(III)) and were characterized using physico-chemical techniques including single-crystal X-ray diffraction spectroscopy. The cerium complex crystallized in a triclinic P-1 space group, while the rest of the complexes crystallized in the monoclinic P21/c space group. All the complexes are ten-coordinate, adopting a tetradecahedron geometry with two HL1 molecules coordinated through the phenolic and methoxy oxygen atoms. The coordination sphere is completed by six oxygen atoms from three bidentately coordinated nitrate ligands. Electronic data reveals that only the neodymium, holmium and erbium complexes exhibit weak f-f transitions in the visible region. KEY WORDS: Preparation, Physico-chemical properties, Lanthanide, Schiff base complexes, Crystal structure, Geometry Bull. Chem. Soc. Ethiop. 2023, 37(6), 1397-1410. DOI: https://dx.doi.org/10.4314/bcse.v37i6.8

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镧系(III)与2-((E)-(叔丁基)甲基)-6-甲氧基苯酚配合物的制备及理化性质

摘要硝酸镧系与2-((E)-(叔丁基苯基)甲基)-6-甲氧基苯酚(HL1)反应生成了5种配合物，分子式为[Ce(HL1)2(NO3)3]∙MeOH和[Ln(HL1)2(NO3)3] (Ln = Nd(III)， Gd(III)， Ho(III)和Er(III))，并利用包括单晶x射线衍射光谱在内的物理化学技术对其进行了表征。铈配合物在三斜P-1空间群中结晶，其余配合物在单斜P21/c空间群中结晶。所有的配合物都是十配位的，采用四面体的几何结构，两个HL1分子通过酚和甲氧基氧原子配位。配位球由三个双齿配位的硝酸盐配体中的六个氧原子组成。电子数据显示，只有钕、钬和铒配合物在可见光区表现出弱的f-f跃迁。关键词:制备，理化性质，镧系元素，席夫碱配合物，晶体结构，几何;公牛。化学。Soc。中国生物医学工程学报，2017,37(6)，1397-1410。DOI: https://dx.doi.org/10.4314/bcse.v37i6.8

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.