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@ARTICLE{Klass:863975,
      author       = {Klass, Larissa and Wilden, Andreas and Kreft, Fabian and
                      Wagner, Christoph and Geist, Andreas and Panak, Petra J. and
                      Herdzik-Koniecko, Irena and Narbutt, Jerzy and Modolo,
                      Giuseppe},
      title        = {{E}valuation of the hydrophilic complexant
                      {N},{N},{N}’,{N}’-tetraethyldiglycolamide ({TEDGA}) and
                      its methyl-substituted analogues in the selective
                      {A}m({III}) separation},
      journal      = {Solvent extraction and ion exchange},
      volume       = {37},
      number       = {5},
      issn         = {0736-6299},
      address      = {Philadelphia, PA},
      publisher    = {Taylor $\&$ Francis},
      reportid     = {FZJ-2019-03891},
      pages        = {297-312},
      year         = {2019},
      abstract     = {N,N,N’,N’-tetraethyldiglycolamide (TEDGA) is used in
                      the French EXAm (extraction of americium) process to
                      separate Am(III) from Cm(III) and Ln(III). In this study,
                      the complexation behavior of TEDGA towards actinides(III)
                      and lanthanides(III) was compared to its methyl-substituted
                      derivatives Me-TEDGA and Me2-TEDGA under experimental
                      conditions applying to the EXAm process. Using the EXAm
                      solvent, 0.6 mol/L
                      N,N’-dimethyl-N,N’-dioctyl-hexylethoxymalonamide
                      (DMDOHEMA) and 0.45 mol/L bis(2-ethylhexyl)-phosphoric acid
                      (HDEHP), An(III) and Ln(III) distribution ratios increase in
                      the order TEDGA < Me-TEDGA < Me2-TEDGA. This is explained by
                      differences in the strength of complexation in the aqueous
                      phase: Conditional stability constants for the formation of
                      [Cm(DGA)x]3+ complexes decrease in the order TEDGA >
                      Me-TEDGA > Me2-TEDGA, as shown by time-resolved laser
                      fluorescence spectroscopy (TRLFS). TRLFS measurements
                      verified the exclusive existence of [Cm(DGA)3]3+ complexes
                      in the aqueous phase. Both the homoleptic [Cm(DMDOHEMA)n]3+
                      and the heteroleptic [Cm(DGA)x(DMDOHEMA)y]3+ complexes were
                      detected in the organic phase, as postulated in the
                      literature.[14]},
      cin          = {IEK-6},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-6-20101013},
      pnm          = {161 - Nuclear Waste Management (POF3-161) / SACSESS -
                      Safety of ACtinide Separation proceSSes (323282)},
      pid          = {G:(DE-HGF)POF3-161 / G:(EU-Grant)323282},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000483877000001},
      doi          = {10.1080/07366299.2019.1651039},
      url          = {https://juser.fz-juelich.de/record/863975},
}