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End date: 2023 × End date: 2019 × Start date: 2010 × DDC: 620 × Type: Article × WGL Institute: LIKAT ×

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    Palladium-catalyzed synthesis of aldehydes from aryl iodides and formic acid with propylphosphonic anhydride as the activator
    (London : Nature Publishing Group, 2018) Wu, Xiao-Feng
    An interesting palladium-catalyzed carbonylative procedure for the synthesis of aromatic aldehydes from aryl iodides has been developed. By using propylphosphonic anhydride as the activator for formic acid, moderate to good yields of the corresponding aldehydes were produced with formic acid as the carbonyl and hydrogen donors. Interestingly, neither additional phosphine ligand nor inert gas protection is needed here.
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    High-resolution imaging with SEM/T-SEM, EDX and SAM as a combined methodical approach for morphological and elemental analyses of single engineered nanoparticles
    (London [u.a.] : Royal Society of Chemistry, 2014) Rades, S.; Hodoroaba, V.-D.; Salge, T.; Wirth, T.; Lobera, M.P.; Labrador, R.H.; Natte, K.; Behnke, T.; Gross, T.; Unger, W.E.S.
    The combination of complementary characterization techniques such as SEM (Scanning Electron Microscopy), T-SEM (Scanning Electron Microscopy in Transmission Mode), EDX (Energy Dispersive X-ray Spectroscopy) and SAM (Scanning Auger Microscopy) has been proven to be a powerful and relatively quick characterization strategy for comprehensive morphological and chemical characterization of individual silica and titania nanoparticles. The selected "real life" test materials, silica and titania, are listed in the OECD guidance manual as representative examples because they are often used as commercial nanomaterials. Imaging by high resolution SEM and in the transmission mode by T-SEM allows almost simultaneous surface and in-depth inspection of the same particle using the same instrument. EDX and SAM enable the chemical characterization of bulk and surface of individual nanoparticles. The core-shell properties of silica based materials are addressed as well. Titania nominally coated by silane purchased from an industrial source has been found to be inhomogeneous in terms of chemical composition.