Synthesis, characterization and structure of lanthanide nitrate complexes with 2-azacyclononanone (AZA)

被引：4
|
作者：
de Souza, HKS
Melo, DMA
Fernandes, JDG
Zinner, K
Zinner, LB
Zukerman-Schpector, J
Vicentini, G
机构：
[1] Univ Fed Rio Grande do Norte, CCET, Dept Quim, BR-59072970 Natal, RN, Brazil
[2] Univ Sao Paulo, Inst Quim, BR-05599970 Sao Paulo, Brazil
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 303卷
基金：
巴西圣保罗研究基金会;
关键词：
lanthanides; 2-azacyclononanone; structure;
D O I：
10.1016/S0925-8388(00)00660-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Complexes with composition [Ln(NO3)(3)(AZA)(3)] (Ln=Nd, Eu, Gd, Tb, Ho and Er) were synthesized and characterized by CHN elemental analyses and lanthanide titration with EDTA. IR spectra show that they are anhydrous and the ligands (AZA) bonded through the carbonyl oxygen; nitrate counter-ions are bidentate, linked to the central ions. The emission spectrum of the europium complex was interpreted in terms of a D-3h distorted to C-3v symmetry. The structure, determined by X-ray single crystal studies is described as a distorted tricapped trigonal prism with the AZA Ligands bonded to one of the bases of the prism and nitrates with one oxygen bonded to one of the bases of the prism and the other forming one of the caps. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：168 / 172
页数：5
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