Solvation structure of impurity molecules in supercritical fluids studied by photoconductivity measurement and X-ray absorption fine structure (XAFS) spectroscopy

Solvation structure of anthracene molecules and bromonaphthalene molecules doped in supercritical xenon fluids was studied on the basis of photoconductivity spectroscopy and X-ray absorption spectroscopy. It was concluded that values of ionization potential derived from photoconductivity measurements were sensitive for the association of xenon atoms onto the benzene rings of the anthracene molecule. Results from the X-ray absorption near-edge structure (XANES) spectra of bromonaphthalene in supercritical xenon and the local association of xenon atoms surrounding the Br atom were detected with high sensitivity