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@PHDTHESIS{Baranowski:1032293,
      author       = {Baranowski, Daniel},
      title        = {{P}robing the {T}ransformation from {T}ransition {M}etal
                      {C}omplexes to {E}xtended {T}wo-{D}imensional
                      {N}anostructures},
      volume       = {284},
      school       = {Duisburg-Essen},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2024-06132},
      isbn         = {978-3-95806-772-1},
      series       = {Reihe Schlüsseltechnologien / Key Technologies},
      pages        = {XII, 103},
      year         = {2024},
      note         = {Dissertation, Duisburg-Essen, 2024},
      abstract     = {The controlled on-surface stabilization of functional
                      transition metal centers can be realized by embedding them
                      in a coordination environment of an organic backbone. Then,
                      realizing twodimensional materials with improved stability
                      and novel properties is possible through the careful design
                      of the organic backbone. An understanding of the changes
                      induced by the transition from isolated transition
                      metal-organic complexes to their extended structures has
                      been defined as the subject of this work. Thereby,
                      transition metal-containing covalent networks and
                      metal-organic frameworks have been realized. Starting from
                      nickel tetraphenylporphyrin polymers, the emergence of
                      π-delocalization in the molecular backbone as a consequence
                      of polymerization has been confirmed by the appearance of
                      energy-dispersive electronic valence states. This is quite
                      surprising since the polymers have been determined to be
                      amorphous by scanning tunneling microscopy measurements.
                      Simultaneously, a defined functionality of the nickel
                      centers has been observed during spectroscopic
                      characterization. The two-dimensional nickel-containing
                      polymers can be tuned by the reactivity of the surface used
                      for their stabilization. Though indicated by the results
                      obtained via theoretical modeling, the energy-dispersive
                      nature of the nickel 3d-based valence states has turned out
                      as experimentally not accessible. To mimic the functional
                      center of nickel tetraphenylporphyrin, the transition from
                      nickel 1,2,4,5-tetracyanobenzene complexes to
                      two-dimensional metal-organic framework has been realized.
                      Thereby, the energy level alignment can be adjusted to
                      enable experimental access to the nickel 3dbased valence
                      states. The appearance of π-conjugation for the nickel
                      3d-based valence states upon formation of the polymeric
                      structure has been clearly confirmed following the same
                      multi-technique approach applied for the characterization of
                      covalent nickel tetraphenylporphyrin networks.},
      cin          = {PGI-6},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {5211 - Topological Matter (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5211},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      doi          = {10.34734/FZJ-2024-06132},
      url          = {https://juser.fz-juelich.de/record/1032293},
}