2D-Molekulare-Architektur

Über

Wir untersuchen die elektronische Struktur und Spin-Zustände von Metallzentren in oberflächengestützten metallorganischen Systemen. Durch die Abstimmung von Wechselwirkungen mit metallischen Substraten und die Modifikation der Koordinationsumgebung der Metallzentren mittels axialer Ligandenfunktionalisierung steuern wir deren elektronische und magnetische Eigenschaften. Der Einsatz der Photoemissions-Tomographie ermöglicht uns hierbei die direkte Abbildung der delokalisierten Bandstrukturen, die sich beim hierarchischen Zusammenbau der organischen Linker und Metallzentren in ein 2D metallorganisches Gerüstgitter ausbilden.

Forschungsthemen

  • Momentum microscopy and photoemission tomography
  • Electronic and magnetic properties of organic/metal interfaces
  • Band structure of metal-ligand hybrid states

Kontakt

Dr. Vitaliy Feyer

PGI-6

Gebäude 04.8 / Raum R 231a

+49 2461/61-1765

E-Mail

Mitglieder

Forschungsthemen

a

Charge Transfer at Organic/Metal Interfaces

Our study reveals that charge transfer between porphyrins and metal substrates unexpectedly populates higher-energy unoccupied molecular orbitals. These insights contribute to the development of next-generation organic materials for high-efficiency solar cells and stimuli-responsive molecular switches.

a

Insight into molecular chemical structure

Photoemission tomography is a powerful method for directly probing on-surface reactions in molecular arrays. Photoemission tomography is a powerful method for directly probing on-surface reactions in molecular arrays. Our study demonstrates the temperature-induced chemical transformation of CoOEP to CoTBP on Ag(100).

a

Materials engineering in flatland (2D-MOFs)

By integrating experimental and theoretical approaches, we provide direct evidence of band structure formation during the hierarchical assembly of organic linkers and transition metal centers into a 2D MOF lattice.

Instrumentierung

PhotoEmission Electron Microscope at NanoESCA beamline

Our group operates a unique PhotoEmission Electron Microscope, permanently located at the Elettra Synchrotron in Trieste. Read more

Publikationen

1. Y. Y. Grisan Qiu, S. Mearini, D. Baranowski, I. Cojocariu, M. Jugovac, G. Zamborlini, P. Gargiani, M. Valvidares, V. Feyer and C. M. Schneider, “Robust high-spin Fe2+ centers in 2D TCNQ-based metal–organic frameworks”, Inorg. Chem. Front. (2025), https://doi.org/10.1039/D4QI03123G

2. Y. Y. Grisan Qiu, D. Brandstetter, S. Mearini, D. Baranowski, I. Cojocariu, M. Jugovac, G. Zamborlini, P. Gargiani, M. Valvidares, A. Windischbacher, P. Puschnig, V. Feyer, C. M. Schneider, “Conformation-Driven Nickel Redox States and Magnetism in 2D Metal–organic Frameworks” Adv. Funct. Mater. (2025) 2418186, https://doi.org/10.1002/adfm.202418186

3. S. Mearini, D. Brandstetter, Y. Y. Grisan Qiu, D. Baranowski, I. Cojocariu, M. Jugovac, P. Gargiani, M. Valvidares, L. Schio, L. Floreano, A. Windischbacher, P. Puschnig, V. Feyer, C. M. Schneider, “Substrate Stabilized Charge Transfer Scheme In Coverage Controlled 2D Metal Organic Frameworks”, Small (2025) 2500507, https://doi.org/10.1002/smll.202500507

The full list of publications from the NanoESCA beamline can be found here:  https://www.elettra.eu/lightsources/elettra/elettra-beamlines/nanoesca/nanoesca-publications/all.html

Letzte Änderung: 06.03.2025
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