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

Autor:	D.M Araújo Melo, L.B. Zinner, H. K. S. de Souza, J. Zukerman-Schpector, Klaus Zinner, Geraldo Vicentini, J. D. Gomes Fernandes
Rok vydání:	2000
Předmět:	Lanthanide Denticity Mechanical Engineering Inorganic chemistry Metals and Alloys Infrared spectroscopy chemistry.chemical_element Crystallography chemistry Mechanics of Materials Materials Chemistry Anhydrous Titration Prism Europium Single crystal
Zdroj:	CIÊNCIAVITAE Scopus-Elsevier
ISSN:	0925-8388
Popis:	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 D3h distorted to C3v 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f16b42a0358f83c5df9a28dfb94f14af https://doi.org/10.1016/s0925-8388(00)00660-5 Zobrazit plný text záznamu Full Text from ScienceDirect