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Title: Thermodynamic and structural description of europium complexation in 1-octanol solution

Polydentate N-bearing ligands such as bis-triazinyl-pyridines (BTPS) are interesting extractants for actinide(III)/lanthanide(III) separation. A description of europium complexation in 1-octanol solutions was undertaken to enhance the knowledge of the extraction mechanisms. Time- Resolved Laser-Induced Fluorescence (TRLIF) spectroscopy allows determination of the first solvation shell for europium(III) nitrate, chloride, and perchlorate with different amounts of water. Europium nitrate complexation by iPr-BTP was then studied by TRLIF and microcalorimetry; the stability constant related to the formation of Eu(BTP){sub 3}{sup 3+} is similar by both techniques (log {beta}{sub 3} = 11.3 {+-} 0.5). The difference of solvation of the cation seems to have an influence on the thermodynamic properties related to the complexation with organic ligands. (authors)
Authors:
; ; ;  [1] ;  [2]
  1. CEA Valrho Marcoule, DEN/DRCP/SCPS/LCAT, BP 17171, 30207 Bagnols-sur-Ceze (France)
  2. Laboratoire de Chimie Physique, IPHC, 25 rue Becquerel, 67087 Strasbourg (France)
Publication Date:
OSTI Identifier:
21230395
Resource Type:
Conference
Resource Relation:
Conference: ISEC 2008: International Solvent Extraction Conference on Solvent Extraction: Fundamentals to Industrial Applications, Tucson, AZ (United States), 15-19 Sep 2008; Other Information: Country of input: France; 9 refs; Related Information: In: Proceedings of ISEC 2008, International Solvent Extraction Conference - Solvent Extraction: Fundamentals to Industrial Applications, by Moyer, Bruce A. (ed.), 1740 pages.
Publisher:
Canadian Institute of Mining, Metallurgy and Petroleum, Montreal, Quebec (Canada)
Research Org:
Chemical Sciences Division, Oak Ridge National Laboratory (United States)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 07 ISOTOPES AND RADIATION SOURCES; ACTINIDES; CALORIMETRY; CHLORIDES; EUROPIUM COMPLEXES; EUROPIUM NITRATES; FLUORESCENCE; LIGANDS; PERCHLORATES; PYRIDINES; SOLUTIONS; SOLVATION; SOLVENT EXTRACTION; SPECTROSCOPY; THERMODYNAMIC PROPERTIES