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Title: Characterization and thermogravimetric analysis of lanthanide hexafluoroacetylacetone chelates

This work reports the thermodynamic characterizations of organometallic species as a vehicle for the rapid separation of volatile nuclear fission products via gas chromatography due to differences in adsorption enthalpy. Because adsorption and sublimation thermodynamics are linearly correlated, there is considerable motivation to determine sublimation enthalpies. A method of isothermal thermogravimetric analysis, TGA-MS and melting point analysis are employed on thirteen lanthanide 1,1,1,5,5,5-hexafluoroacetylacetone complexes to determine sublimation enthalpies. An empirical correlation is used to estimate adsorption enthalpies of lanthanide complexes on a quartz column from the sublimation data. Additionally, four chelates are characterized by SC-XRD, elemental analysis, FTIR and NMR.
Authors:
ORCiD logo [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [2]
  1. Univ. of Tennessee, Knoxville, TN (United States). Department of Nuclear Engineering
  2. Univ. of Tennessee, Knoxville, TN (United States). Department of Nuclear Engineering, Radiochemistry Center of Excellence, and Institute for Nuclear Security
  3. Univ. of Tennessee, Knoxville, TN (United States). Department of Chemistry
Publication Date:
Grant/Contract Number:
NA0001983
Type:
Published Article
Journal Name:
Journal of Radioanalytical and Nuclear Chemistry
Additional Journal Information:
Journal Volume: 311; Journal Issue: 1; Journal ID: ISSN 0236-5731
Publisher:
Springer
Research Org:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; Nuclear forensics; Thermogravimetric analysis; Thermochromatography; Rapid separations; Hexafluoroacetylacetone; Lanthanides
OSTI Identifier:
1312054
Alternate Identifier(s):
OSTI ID: 1426147