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@ARTICLE{Iza:189819,
      author       = {Iza, Nerea and Guerrero-Martínez, Andrés and Tardajos,
                      Gloria and Ortiz, María José and Palao, Eduardo and
                      Montoro, Teresa and Radulescu, Aurel and Dreiss, Cécile A.
                      and González-Gaitano, Gustavo},
      title        = {{U}sing {I}nclusion {C}omplexes with {C}yclodextrins {T}o
                      {E}xplore the {A}ggregation {B}ehavior of a {R}uthenium
                      {M}etallosurfactant},
      journal      = {Langmuir},
      volume       = {31},
      number       = {9},
      issn         = {1520-5827},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2015-02837},
      pages        = {2677 - 2688},
      year         = {2015},
      abstract     = {The aggregation behavior of a chiral metallosurfactant,
                      bis(2,2′-bipyridine)(4,4′-ditridecyl-2,2′-bipyridine)ruthenium(II)
                      dichloride (Ru24C13), synthesized as a racemic mixture was
                      characterized by small-angle neutron scattering, light
                      scattering, NMR, and electronic spectroscopies. The analysis
                      of the SANS data indicates that micelles are prolate
                      ellipsoids over the range of concentrations studied, with a
                      relatively low aggregation number, and the micellization
                      takes place gradually with increasing concentration. The
                      presence of cyclodextrins (β-CD and γ-CD) induces the
                      breakup of the micelles and helps to establish that
                      micellization occurs at a very slow exchange rate compared
                      to the NMR time scale. The open structure of this
                      metallosurfactant enables the formation of very stable
                      complexes of 3:1 stoichiometry, in which one CD threads one
                      of the hydrocarbon tails and two CDs the other, in close
                      contact with the polar head. The complex formed with β-CD,
                      more stable than the one formed with the wider γ-CD, is
                      capable of resolving the Δ and Λ enantiomers at high
                      CD/surfactant molar ratios. The chiral recognition is
                      possible due to the very specific interactions taking place
                      when the β-CD covers—via its secondary rim—part of the
                      diimine moiety connected to the hydrophobic tails. A SANS
                      model comprising a binary mixture of hard spheres (complex +
                      micelles) was successfully used to study quantitatively the
                      effect of the CDs on the aggregation of the surfactant.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {670},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000350918500009},
      doi          = {10.1021/la504929x},
      url          = {https://juser.fz-juelich.de/record/189819},
}