K beta X-ray emission spectra and chemical environments of phosphorus in some selected compounds

The phosphorus K beta emission fluorescence spectra from 10 selected compounds are measured with a high-resolution two-crystal vacuum spectrometer. The phosphorus compounds studied include inorganic compounds K2HPO3, NaH2PO2 . H2O; NaH2PO3 . 2.5H(2)O; Ca2P2O7, Cu2P2O7 and (NaPO3)(6); and organic compounds tri-o-tolylphosphine (o-CH3C6H4)(3)P; tri-m-tolylphosphine (m-CH3C6H4)(3)P, tri-p-tolylphosphine (p-CH3C6H4)(3)P and triphenylphosphine oxide (C6H5)(3)PO. The measured P K beta emission spectra are discussed in relation to chemical environments around phosphorus atom in the compounds. It is shown that the P K beta emission spectra are strongly influenced by chemical environments. The effect of o-, m- and p-methyl substitution at the benzene ring (position isomerism) is observed in the emission spectra of tri-o-tolylphosphine, tri-m-tolylphosphine and tri-p-tolylphosphine.