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@ARTICLE{Stadtmller:280902,
      author       = {Stadtmüller, Benjamin and Schröder, Sonja and Kumpf,
                      Christian},
      title        = {{H}eteromolecular metal–organic interfaces: {E}lectronic
                      and structural fingerprints of chemical bonding},
      journal      = {Journal of electron spectroscopy and related phenomena},
      volume       = {204},
      issn         = {0368-2048},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2016-00613},
      pages        = {80 - 91},
      year         = {2015},
      abstract     = {Beside the fact that they attract highest interest in the
                      field of organic electronics, heteromolecular structures
                      adsorbed on metal surfaces, in particular donor–acceptor
                      blends, became a popular field in fundamental science,
                      possibly since some surprising and unexpected behaviors were
                      found for such systems. One is the apparent breaking of a
                      rather fundamental rule in chemistry, namely that stronger
                      chemical bonds go along with shorter bond lengths, as it is,
                      e.g., well-known for the sequence from single to triple
                      bonds. In this review we summarize the results of
                      heteromolecular monolayer structures adsorbed on Ag(1 1 1),
                      which – regarding this rule – behave in a
                      counterintuitive way. The charge acceptor moves away from
                      the substrate while its electronic structure indicates a
                      stronger chemical interaction, indicated by a shift of the
                      formerly lowest unoccupied molecular orbital toward higher
                      binding energies. The donor behaves in the opposite way, it
                      gives away charge, hence, electronically the bonding to the
                      surface becomes weaker, but at the same time it also
                      approaches the surface. It looks as if the concordant link
                      between electronic and geometric structure was broken. But
                      both effects can be explained by a substrate-mediated charge
                      transfer from the donor to the acceptor. The charge
                      reorganization going along with this transfer is responsible
                      for both, the lifting-up of the acceptor molecule and the
                      filling of its LUMO, and also for the reversed effects at
                      the donor molecules. In the end, both molecules mutually
                      enhance their respective donor and acceptor characters. We
                      argue that this effect is of general validity for
                      π-conjugated molecules adsorbing on noble metal surfaces.},
      cin          = {PGI-3 / JARA-FIT},
      ddc          = {620},
      cid          = {I:(DE-Juel1)PGI-3-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {141 - Controlling Electron Charge-Based Phenomena
                      (POF3-141)},
      pid          = {G:(DE-HGF)POF3-141},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000363078400011},
      doi          = {10.1016/j.elspec.2015.03.003},
      url          = {https://juser.fz-juelich.de/record/280902},
}