From single-site tantalum complexes to nanoparticles of Ta _x N _y and TaO _x N _y supported on silica: elucidation of synthesis chemistry by dynamic nuclear polarization surface enhanced NMR spectroscopy and X-ray absorption spectroscopy.

ABSTRACT: Air-stable catalysts consisting of tantalum nitride nanoparticles represented as a mixture of Ta _x N _y and TaO _x N _y with diameters in the range of 0.5 to 3 nm supported on highly dehydroxylated silica were synthesized from TaMe₅ (Me = methyl) and dimeric Ta₂(OMe)₁₀ with guidance by the principles of surface organometallic chemistry (SOMC). Characterization of the supported precursors and the supported nanoparticles formed from them was carried out by IR, NMR, UV-Vis, extended X-ray absorption fine structure, and X-ray photoelectron spectroscopies complemented with XRD and high-resolution TEM, with dynamic nuclear polarization surface enhanced NMR spectroscopy being especially helpful b

SUBMITTER: Mohandas JC 

PROVIDER: S-EPMC5621011 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature