On‐Surface Reactive Planarization of Pt(II) Complexes
| Autor: | Jindong Ren, Dana Brünink, Stefan Buss, Constantin G. Daniliuc, Cristian A. Strassert, Lacheng Liu, Hong-Ying Gao, Harald Fuchs, Marvin Cnudde, Nikos L. Doltsinis |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
surface chemistry 010402 general chemistry 01 natural sciences Catalysis law.invention Metal Planar law Chemical-mechanical planarization Monolayer Self‐Assembled Monolayers Moiety Bond cleavage 010405 organic chemistry Communication scanning tunnelling microscopy General Chemistry Pt complexes Communications 0104 chemical sciences Crystallography visual_art visual_art.visual_art_medium Density functional theory density functional theory calculations Scanning tunneling microscope |
| Zdroj: | Angewandte Chemie (International Ed. in English) |
| ISSN: | 1521-3773 1433-7851 |
| DOI: | 10.1002/anie.201906247 |
| Popis: | A series of Pt(II) complexes with tetradentate luminophores has been designed, synthesized, and deposited on coinage metal surfaces with the aim to produce highly planar self‐assembled monolayers. Low‐temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations reveal a significant initial nonplanarity for all complexes. A subsequent metal‐catalyzed separation of the nonplanar moiety at the bridging unit via the scission of a C−N bond is observed, leaving behind a largely planar core complex. The activation barrier of this bond scission process is found to depend strongly on the chemical nature of both bridging group and coordination plane, and to increase from Cu(111) through Ag(111) to Au(111). Metal‐catalyzed cleavage of a nonplanar moiety in Pt(II) complexes via the scission of a C−N bond leaves, which leaves behind a largely planar core complex, can be tuned by suitable molecular design. This method provides an alternative means of producing planar Pt(II) complexes, which can be difficult to synthesize by traditional solution processing, but are essential for molecular stacking in electroluminescent devices. |
| Databáze: | OpenAIRE |
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