Synthesis, Stabilization, Functionalization and, DFT Calculations of Gold Nanoparticles in Fluorous Phases (PTFE and Ionic Liquids)

Gold nanoparticlcs (Au-NPs) were reproducibly obtained by thermal, photolytic, or microwave-assisted decomposition/reduction under argon froth Au(CO)Cl or KALICI, in the presence of n-butylimidazol dispersed lit the ionic liquids (ILs) BMIm(+)BF(4)(-) BMIm(+)OTf(-). or BtMA(+)Ntf(2)(-) (BMIm(+) = n-butylmethylimidazolium.. BtMA(+) = n-butyltrimethylammonium, OTf+ = -O3SCF3; SCI-3, NTf2-, = N--(O2SCF3)(2)) The ultra small and uniform nanoparticlcs of about 1-2 nm diameter were produced in BMIm(+)BF(4)(-),,and increased fit size with the molecular volume of the ionic liquid anion used to BMIm(+)OTf(-) and BtMA(+)NTf(2)(-) Under argon the Au-NP/IL dispersion is stable Without any additional stabilizers or capping molecules from the ionic liquids, the gold nanoparticles can be functionalized with organic thiol ligands, transferred, and stabilized in different polar arid nonpolar organic solvents. Au-NPs calf also be brought onto and stabilized by Interaction with a polytctrafluoroethylene (PTFE. Teflon) surface Density functional theory (DFT) calculations favor interactions between IL anions instead of IL cottons This Suggests a Au . F interaction and anionic Au-n stabilization in fluorine-containing ILs The F-19 NMR signal in BMIm(+)BF(4)(-) a small Au-NP concentration-dependent shift Characterization of the dispersed and deposited gold nanoparticles was done. by transmission electron microscopy (TEM/HRTEM), transmission electron diffraction (TED), dynamic light scattering (DLS), UV/Vis absorbance spectroscopy, scanning electron microscopy (SI-M), electron spilt resonance (ESR). and electron probe micro analyses (EPM, SEM/EDX).