Characterization of organic molecules attached to gold nanoparticle surface using high resolution magic angle spinning 1H NMR

Zhou Hongyu, Du Fenfang, Li Xi, Zhang Bin, Wei Li, Yan Bing

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Structural elucidation of molecules attached to nanoparticle surface holds key to the successful chemical modifications of nanomaterial surface. In this investigation, we effectively optimized 1H HRMAS NMR conditions and applied one- and two-dimensional techniques to fully characterize ligand structures on surfaces of gold nanoparticles (GNPs). We found that there are significant differences in detection sensitivity depending on the distance between the surface of GNP and protons in the ligand molecule, with the loss of sensitivity for protons closer to the nanoparticles. Furthermore, NMR spectra of aromatic protons in ligands attached to GNP seem to have a broad base compared with aliphatic ligands, indicating some degree of potential π-π stacking effects. Our results demonstrate that 1H HRMAS NMR is an irreplaceable method for fully characterizing nanoparticle surface-bound molecules.

Original languageEnglish (US)
Pages (from-to)19360-19366
Number of pages7
JournalJournal of Physical Chemistry C
Volume112
Issue number49
DOIs
StatePublished - Dec 11 2008

Fingerprint

Magic angle spinning
Gold
metal spinning
Nuclear magnetic resonance
gold
Nanoparticles
nanoparticles
nuclear magnetic resonance
Molecules
high resolution
Ligands
Protons
molecules
ligands
protons
Chemical modification
Nanostructured materials
sensitivity

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Characterization of organic molecules attached to gold nanoparticle surface using high resolution magic angle spinning 1H NMR. / Hongyu, Zhou; Fenfang, Du; Xi, Li; Bin, Zhang; Li, Wei; Bing, Yan.

In: Journal of Physical Chemistry C, Vol. 112, No. 49, 11.12.2008, p. 19360-19366.

Research output: Contribution to journalArticle

Hongyu, Zhou ; Fenfang, Du ; Xi, Li ; Bin, Zhang ; Li, Wei ; Bing, Yan. / Characterization of organic molecules attached to gold nanoparticle surface using high resolution magic angle spinning 1H NMR. In: Journal of Physical Chemistry C. 2008 ; Vol. 112, No. 49. pp. 19360-19366.
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