Characterization of Organic Molecules Attached to Gold Nanoparticle Surface Using High Resolution Magic Angle Spinning 1H NMR

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