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On-Surface Reactive Planarization of Pt(II) Complexes.

Jindong Ren1,2, Marvin Cnudde3,2, Dana Brünink4

  • 1Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149, Münster, Germany.

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Summary
This summary is machine-generated.

Platinum(II) complexes initially nonplanar on metal surfaces undergo a metal-catalyzed bond scission, forming planar self-assembled monolayers. This process

Keywords:
Pt complexesdensity functional theory calculationsscanning tunnelling microscopysurface chemistry

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Area of Science:

  • Surface science
  • Coordination chemistry
  • Materials science

Background:

  • Designing self-assembled monolayers (SAMs) with high planarity is crucial for advanced electronic applications.
  • Platinum(II) complexes offer tunable properties for SAM formation.

Purpose of the Study:

  • To design and synthesize Pt(II) complexes for highly planar SAMs on coinage metal surfaces.
  • To investigate the self-assembly behavior and structural evolution of these complexes.

Main Methods:

  • Synthesis of tetradentate Pt(II) luminophore complexes.
  • Deposition on coinage metal surfaces (Cu, Ag, Au).
  • Low-temperature scanning tunneling microscopy (STM) for structural analysis.
  • Density functional theory (DFT) calculations for mechanistic insights.

Main Results:

  • Initial deposition resulted in significant nonplanarity for all Pt(II) complexes.
  • Metal-catalyzed C-N bond scission at the bridging unit was observed, leading to planar core complexes.
  • The activation barrier for bond scission increased in the order Cu(111) < Ag(111) < Au(111).

Conclusions:

  • A novel pathway for achieving planar SAMs from initially nonplanar Pt(II) complexes was demonstrated.
  • The metal surface plays a critical role in catalyzing the structural transformation.
  • Understanding the bond scission mechanism provides insights for designing future SAMs with controlled planarity.