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Ligand Structure Determines Nanoparticles' Atomic Structure, Metal-Ligand Interface and Properties.

Milan Rambukwella1, Naga Arjun Sakthivel1, Jared H Delcamp1

  • 1Department of Chemistry and Biochemistry, University of Mississippi, Oxford, MS, United States.

Frontiers in Chemistry
|August 23, 2018
PubMed
Summary

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The ligand

Area of Science:

  • Nanomaterials Science
  • Surface Chemistry
  • Computational Chemistry

Background:

  • Thiolate protected gold nanomolecules (Aun(SR)m) exhibit properties dictated by their ligands.
  • Understanding ligand effects is crucial for controlling nanomolecule characteristics.

Purpose of the Study:

  • To review the significant impact of ligand structure on gold nanomolecules.
  • To elucidate the ligand effect across different thiol types: aliphatic (AL), aromatic (AR), and bulky (BU).

Main Methods:

  • Direct synthesis of nanomolecules using AL, AR, and BU ligands.
  • Molecular conversion and interconversion experiments between specific gold nanomolecule compositions.
  • Synthesis from a common precursor (Aun(S-glutathione)m) with varying ligands.
Keywords:
ligand effectligand-ligand interactionmetal ligand interfacenanoparticle atomic structurenanoparticle synthesis

Related Experiment Videos

  • Computational analysis of thermodynamic stability and ligand-ligand interactions.

    • Main Results:

    • Ligand nature directly determines nanomolecule composition, atomic structure, and physical properties.
    • Direct synthesis yields unique atomic structures and compositions based on AL, AR, and BU ligands.
    • Ligand structure significantly influences the metal-ligand interface and overall properties.
    • Computational studies confirm thermodynamic stability and highlight ligand-ligand interactions as key.

    Conclusions:

    • Ligand structure is the primary determinant of gold nanomolecule architecture and properties.
    • The ligand effect extends to other passivated systems like nanoparticles and quantum dots.
    • Ligand-ligand interactions are critical for the stability of certain gold nanomolecules, particularly those with aliphatic ligands.