2D Molecular Architecture

About

We investigate the electronic structure and spin states of metal centers in surface-supported metal-organic systems. By tuning interactions with metallic substrates and modifying the coordination environment of metal centers through axial ligand functionalization, we control their electronic and magnetic properties. Using photoemission tomography, we aim to directly observe the formation of delocalized band structures during the hierarchical assembly of organic linkers and metal centers into a 2D metal-organic framework lattice.

Research Topics

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

Contact

Dr. Vitaliy Feyer

PGI-6

Building 04.8 / Room R 231a

+49 2461/61-1765

E-Mail

Members

Research

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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.

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Insight into molecular chemical structure

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).

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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.

Instrumentation

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

Last Modified: 06.03.2025
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