Influence of Halogen-Solvent Hydrogen Bonding on Gold Nanocluster Photoluminescence

Daniel J. Heintzelman, Seth A. Nelson, Kenneth L. Knappenberger

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The influence of gold nanocluster-solvent interactions on nanostructure optical properties was determined. Using [Au11(BINAP)4X2]+, where X = Cl or Br, as a model system, the dramatic influence of halogen-solvent hydrogen bonding on nanocluster optical properties was resolved. The creation of a nanocluster-solvent hydrogen-bond network yielded intense photoluminescence (PL) and an accompanying 2-fold reduction in vibration-mediated nonradiative decay rates. PL was quenched for systems that did not support hydrogen bonding. As reflected by absorption line widths, Raman scattering, and transient absorption spectroscopy measurements, the hydrogen-bond network increased nanocluster structural rigidity and reduced nonradiative carrier decay rates. The results highlight the significant role of the nanocluster-solvent interface in determining the properties of structurally precise materials.

Original languageEnglish (US)
Pages (from-to)2951-2956
Number of pages6
JournalJournal of Physical Chemistry Letters
Issue number11
StatePublished - Mar 21 2024

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Physical and Theoretical Chemistry

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