Mössbauer study of mixed-ligand complexes of europium(III)
Mössbauer study of mixed-ligand complexes of europium(III)
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铕(III)混合配体配合物的穆斯堡尔研究
DOI：
10.1007/bf00674269
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发表时间：
1990
影响因子：
1.7
通讯作者：
M. Ebel
中科院分区：
文献类型：
--
作者：
K. Burger;Z. Nemes;A. Vértes;E. Kuzmann;M. Suba;J. Kiss;H. Ebel;M. Ebel
以1,10-菲罗啉或2,2′-联吡啶为中性配体，以简单的无机阴离子或苯甲酸盐及其衍生物为离子配体，制备了一系列铕（III）混合配合物。产物的Mössbauer光谱表明，这两种类型的配体都与铕（III）原子直接配位。Mössbauer同分异构体位移值反映了取代基对配体的电子位移和空间效应。四极分裂值表明，在几乎所有具有类似组成的配合物中，铕的电子壳层具有相似的对称性。红外光谱为含苯甲酸酯及其衍生物的配合物中羧酸基的结合方式提供了证据。化合物的x射线光电子能谱证明了亲电和亲核取代基对铕、氧和氮轨道上电子结合能的影响。
A series of europium(III) mixed complexes was prepared containing 1,10-phenanthroline or 2,2′-bipyridine as neutral ligand and simple inorganic anions or benzoate and its derivatives as ionic ligands. The Mössbauer spectra of the products indicated that both types of ligands were directly coordinated to the central europium(III) atom. The Mössbauer isomer shift values reflected both electron shifting and steric effects of the substituents on the ligand. The quadrupole splitting values pointed to the similar symmetry of the electron shell of the europium in almost all complexes with analogous composition. The IR spectra provided evidence of the binding mode of the carboxylate groups in the complexes containing benzoate or its derivatives. The x-ray photoelectron spectra of the compounds demonstrated the effects of electrophilic and nucleophilic substituents on the electron binding energies in the europium, oxygen, and nitrogen orbitals.