Determination of halide impurities in ionic liquids by total reflection X-ray fluorescence spectrometry.

Preparation and characterisation of high-density ionic liquids incorporating halobismuthate anions.

A range of ionic liquids containing dialkylimidazolium cations and halobismuthate anions ([BiBr(x)Cl(y)I(z)](-) and [Bi2Br(x)Cl(y)I(z)](-)) were synthesised by combining dialkylimidazolium halide ionic liquids with bismuth(III) halide salts. The majority were room temperature liquids, all with very high densities. The neat ionic liquids and their mixtures with 1-butyl-3-methylimidazolium bis(tr...

Aluminum Impurities in Silicon: Investigation of X-ray Raman Scattering in Total Reflection X-ray Fluorescence Spectroscopy

Total Reflection X-ray Fluorescence (TXRF) using Synchrotron Radiation from the Stanford Synchrotron Radiation Laboratory (SSRL) has been used to study Al impurities on Si wafer surfaces. For primary excitation energies below the Si K absorption edge an inelastic resonance scattering due to resonant xray Raman scattering is observed. This scattering dominates the background behavior of the Al K...

Analytical approaches for Hg determination in wastewater samples by means of total reflection X-ray fluorescence spectrometry.

At present, there is a considerable interest in Hg monitoring in wastewater samples due to its widespread occurrence and the high toxicity of most of its compounds. Hg determination in water samples by means of total reflection X-ray fluorescence spectrometry (TXRF) entails some difficulties due to the high vapor pressure and low boiling point of this element that produce evaporation and loss o...

Determination of carbon in natural freshwater biofilms with total reflection X-ray fluorescence spectrometry

Sulfonium-based Ionic Liquids Incorporating the Allyl Functionality

A series of sulfonium halides bearing allyl groups have been prepared and characterized. Anion metathesis with Li[Tf2N] and Ag[N(CN)2] resulted in sulfonium-based ionic liquids which exhibit low viscosities at room temperature. The solid state structure of one of the halide salts was determined by single crystal X-ray diffraction.