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@ARTICLE{Eguchi:820455,
      author       = {Eguchi, Kazuya and Niether, Doreen and Wiegand, Simone and
                      Kita, Rio},
      title        = {{T}hermophoresis of cyclic oligosaccharides in polar
                      solvents},
      journal      = {The European physical journal / E},
      volume       = {39},
      number       = {9},
      issn         = {1292-895X},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {FZJ-2016-05765},
      pages        = {86},
      year         = {2016},
      abstract     = {Cyclodextrins are cyclic oligosaccharides which are
                      interesting as drug delivery systems, because they can be
                      used as containers for pharmaceutical substances. We studied
                      the Ludwig-Soret effect of $\alpha$-, $\beta$-, $\gamma$-
                      and methyl-$\beta$-cyclodextrin in water and formamide by
                      infrared thermal diffusion forced Rayleigh scattering
                      (IR-TDFRS).In water the Soret coefficient, $S_{\mathrm{T}}$,
                      of $\alpha$-, $\beta$- and $\gamma$-cyclodextrin increases
                      with increasing temperature and shows a sign change from
                      negative to positive around $T=35^\circ$C, while
                      $S_{\mathrm{T}}$ of methyl-$\beta$-cyclodextrin is positive
                      in the entire investigated temperature. In formamide
                      $S_{\mathrm{T}}$-values of all cyclodextrins coincide and
                      show a slight decrease with temperature. We discuss the
                      obtained results and relate the $S_{\mathrm{T}}$-values to
                      the different hydrogen bonding capabilities of the
                      cyclodextrins and the used solvents. It turns out that the
                      change of $S_{\mathrm{T}}$ with temperature correlates with
                      the partition coefficient, log~$P$, which indicates that
                      more hydrophilic substances show a more pronounced
                      temperature sensitivity of $S_{\mathrm{T}}$. Additionally we
                      obtained a surprising result measuring the refractive index
                      contrast factor with temperature, $(\partial n/\partial
                      T)_{c,p}$ of cyclodextrins in formamide, which might be
                      explained by a complex formation between cyclodextrins and
                      formamide.},
      cin          = {ICS-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000384580700001},
      doi          = {10.1140/epje/i2016-16086-5},
      url          = {https://juser.fz-juelich.de/record/820455},
}