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Surface-Fixed Switchable Metal Complex Ensembles: Synthesis and Characterization Insights

This work presents the synthesis and characterization of surface-fixed switchable metal complex ensembles, specifically focusing on iron(II) complexes adsorbed on Au surfaces. Techniques used include X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), and scanning tunneling microscopy (STM). The behavior of various complexes is examined, revealing distinct angle-dependent and independent properties. Detailed structural analysis through crystallization reveals insights into Fe–N bond distances, contributing to our understanding of these novel materials' electronic properties for future applications.

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Surface-Fixed Switchable Metal Complex Ensembles: Synthesis and Characterization Insights

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  1. B5: Oberflächenfixierte schaltbare Metallkomplex-Ensembles Sophie Hain ·Marco Haryono ·Andreas Grohmann SCO Compounds on Surfaces Working Group Partner: C2 (Saalfrank/Klamroth): Berechnung von B3 (Kuch/Wende): XAS/XPS-Messungen von adsorbierten Schichten (BESSY) [tridentate Liganden] B4 (Fumagalli/Rüdt): Elektronenspektren Manfred Buck STM-Messungen von FeII-Komplexen auf Au (St. Andrews) • Geometrien • IR-Spektren der hs- und ls-Form

  2. 1 N-(2-mercaptoethyl)-2,6-di(1H-pyrazol-1-yl)pyridin-4-carboxamid XAS/XPS-Messungen (BESSY) [Kuch/Bernien]: Auf Au adsorbierte Schichten (aus ROH-Lösung): 2 Bis(2,6-di(1H-pyrazol-1-yl)-4-(thiocyanatomethyl)pyridin)-Eisen(II)-bis(tetrafluoroborat) • in beiden Fällen Oberflächenadsorption • Dicke: 1 Monolage • Verbindung 1 zeigt winkelabhängiges Verhalten ↔ Ordnung • Verbindung 2 zeigt kein winkelabhängiges Verhalten; • B und F nicht detektiert

  3. Synthesen Verbindungen 1, 2 und 2Ligand stehen zur Verfügung; RSCN ergibt gute Schichten! 2 Verbindung Umkristallisation aus MeOH bei RT: gelbe Einkristalle (MeOH/Et2O) R'strukturanalyse bei 100 K (Bild): mittlerer Abstand d(Fe–N) = 218 pm Umkristallisation aus MeOH (65 °C): rote (+ gelbe) Einkristalle (MeOH/Et2O) R'strukturanalyse bei 150 K: mittlerer Abstand d(Fe–N) = 196 pm

  4. Publikationen: Andreas Grohmann

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