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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Substrate Stabilized Charge Transfer Scheme In Coverage Controlled 2D Metal Organic Frameworks.

Simone Mearini1, Dominik Brandstetter2, Yan Yan Grisan Qiu1

  • 1Peter Grünberg Institute (PGI-6), Jülich Research Centre, 52428, Jülich, Germany.

Small (Weinheim an Der Bergstrasse, Germany)
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This study shows that the electronic structure of silver-supported 2D metal-organic frameworks (MOFs) is stable, even with varying nickel-to-ligand ratios. Electron transfer from the silver substrate ensures robust electronic properties for advanced applications.

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2D materialscharge transfermolecular ligandssingle‐layer metal‐organic frameworkstransition metals

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Chemistry

Background:

  • 2D metal-organic frameworks (MOFs) are promising for advanced materials due to tunable electronic and magnetic properties.
  • Complex charge transfer mechanisms are key characteristics of these 2D MOFs.

Purpose of the Study:

  • Investigate the influence of Ni-to-ligand ratio on electronic charge redistribution in Ag(100)-supported 2D MOFs.
  • Understand the interplay between substrate-MOF and linker-ligand charge transfer.

Main Methods:

  • Synthesis of a 2D MOF using nickel (Ni) linkers and 7,7,8,8-tetracyanoquinodimethane (TCNQ) ligands.
  • Analysis of electronic charge redistribution in an Ag(100)-supported system.
  • Evaluation of Ni-to-ligand ratio effects on electronic and magnetic properties.

Main Results:

  • A stable electronic equilibrium is achieved through interplay of charge transfer processes.
  • The electronic structure remains robust and independent of stoichiometric ratios.
  • Electron transfer from the Ag substrate stabilizes the MOF electronic structure.

Conclusions:

  • The electronic structure of these 2D MOFs is remarkably stable against structural variations.
  • Minor changes in Ni magnetic response do not significantly alter overall electronic stability.
  • These findings highlight the potential of 2D MOFs for electronics and spintronics.