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@ARTICLE{Metzelaars:894625,
      author       = {Metzelaars, Marvin and Schleicher, Sebastian and Hattori,
                      Takuma and Borca, Bogdana and Matthes, Frank and Sanz,
                      Sergio and Bürgler, Daniel E. and Rawson, Jeff and
                      Schneider, Claus M. and Kögerler, Paul},
      title        = {{C}yclophane with eclipsed pyrene units enables
                      construction of spin interfaces with chemical accuracy},
      journal      = {Chemical science},
      volume       = {12},
      number       = {24},
      issn         = {2041-6539},
      address      = {Cambridge},
      publisher    = {RSC},
      reportid     = {FZJ-2021-03322},
      pages        = {8430 - 8437},
      year         = {2021},
      abstract     = {Advanced functionality in molecular electronics and
                      spintronics is orchestrated by exact molecular arrangements
                      at metal surfaces, but the strategies for constructing such
                      arrangements remain limited. Here, we report the synthesis
                      and surface hybridization of a cyclophane that comprises two
                      pyrene groups fastened together by two ferrocene pillars.
                      Crystallographic structure analysis revealed pyrene planes
                      separated by ∼352 pm and stacked in an eclipsed geometry
                      that approximates the rare configuration of AA-stacked
                      bilayer graphene. We deposited this cyclophane onto surfaces
                      of Cu(111) and Co(111) at submonolayer coverage and studied
                      the resulting hybrid entities with scanning tunnelling
                      microscopy (STM). We found distinct characteristics of this
                      cyclophane on each metal surface: on non-magnetic Cu(111),
                      physisorption occurred and the two pyrene groups remained
                      electronically coupled to each other; on ferromagnetic
                      Co(111) nanoislands, chemisorption occurred and the two
                      pyrene groups became electronically decoupled.
                      Spin-polarized STM measurements revealed that the ferrocene
                      groups had spin polarization opposite to that of the
                      surrounding Co metal, while the pyrene stack had no spin
                      polarization. Comparisons to the non-stacked analogue
                      comprising only one pyrene group bolster our interpretation
                      of the cyclophane's STM features. The design strategy
                      presented herein can be extended to realize versatile,
                      three-dimensional platforms in single-molecule electronics
                      and spintronics.},
      cin          = {PGI-6},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-6-20110106},
      pnm          = {5213 - Quantum Nanoscience (POF4-521)},
      pid          = {G:(DE-HGF)POF4-5213},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {34221324},
      UT           = {WOS:000652676600001},
      doi          = {10.1039/D1SC01036K},
      url          = {https://juser.fz-juelich.de/record/894625},
}