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@ARTICLE{Kolmangadi:637144,
      author       = {Kolmangadi, Mohamed A. and Raab, Aileen R. and Szymoniak,
                      Paulina and Li, Zhuoqing and Huber, Patrick and Laschat,
                      Sabine and Schönhals, Andreas},
      title        = {{M}olecular mobility and electrical conductivity of amino
                      acid-based ({DOPA}) ionic liquid crystals in the bulk state
                      and nanoconfinement},
      journal      = {Physical chemistry, chemical physics},
      volume       = {1},
      issn         = {1463-9076},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {PUBDB-2025-03777},
      pages        = {10.1039.D5CP02406D},
      year         = {2025},
      abstract     = {This study explores the molecular mobility, phase behavior,
                      and electrical conductivity of dihydroxyphenylalanine-based
                      ionic liquid crystals (DOPAn, with alkyl side chains n = 12,
                      14, 16) featuring cyclicguanidiniumchloride headgroups, in
                      both bulk and nanoconfined states. Using broadband
                      dielectricspectroscopy, differential scanning calorimetry,
                      and fast scanning calorimetry, the research uncovers
                      acomplex interplay between molecular structure,
                      self-assembly, and molecular mobility. In bulk, DOPAnshows a
                      phase sequence from plastic crystalline to hexagonal
                      columnar and isotropic phases, driven bysuperdisc formation
                      and columnar organization. Multiple relaxation processes are
                      identified: localized sidechaindynamics (g-relaxation),
                      ionic headgroup or core motions (a1-relaxation), and
                      cooperative alkyldomain fluctuations (a2-relaxation).
                      Conductivity decreases with increasing side chain length.
                      Undernanoconfinement in anodic aluminum oxide membranes,
                      phase behavior changes: the Colh–Iso transitionis
                      suppressed, and a new a3-relaxation appears, linked to
                      dynamics in an adsorbed interfacial layer. DC
                      conductivitydrops by up to four orders of magnitude due to
                      confinement effects, altered molecular orientation,and phase
                      transitions—especially the emergence of a nematic-like
                      state in DOPA16. These findingshighlight the importance of
                      molecular design, pore geometry, and surface chemistry in
                      tuning ionic liquidcrystal properties for advanced
                      applications in nanofluidics, ion transport, and responsive
                      materials},
      cin          = {CIMMS},
      ddc          = {540},
      cid          = {I:(DE-H253)CIMMS-20211022},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / DFG project G:(GEPRIS)430146019 -
                      Ionische Flüssigkristalle in Nanoporösen Festkörpern:
                      Selbstorganisation, molekulare Mobilität und
                      elektro-optische Funktionalitäten (430146019)},
      pid          = {G:(DE-HGF)POF4-632 / G:(GEPRIS)430146019},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1039/D5CP02406D},
      url          = {https://bib-pubdb1.desy.de/record/637144},
}