Soft-x-ray fluorescence study of the quasi-one-dimensional Heisenberg antiferromagnet tetraphenylverdazyl

Abstract

Soft-x-ray fluorescence measurements have been performed on a single crystal of the organic antiferromagnet 2,4,6-triphenylverdazyl. Resonant and nonresonant C K␣ and N K␣ (2p→1s transition͒ x-ray emission spectra ͑XES͒ were measured and compared with x-ray photoelectron valence band spectra and deMon density-functional theory calculations. It is shown that intramolecular interactions are much stronger than intermolecular ones and give the main contribution to the formation of C 2p density of states. We present evidence of a delocalization of unpaired N 2p electrons over the verdazyl ring. The excitation energy dependence of C K␣ and N K␣ XES observed below the C 1s and N 1s thresholds, respectively, is discussed in terms of symmetry selective resonant inelastic x-ray scattering.

Atomic Spectrometry Update. X-ray fluorescence spectrometry

“…Other applications included analysis of powder microsamples of multi-element mono-and poly-crystals by Jurczyk et al 389 Hukka and Zhang 390 used EDXRF to monitor Cl levels in amorphous carbon films and Cuevas et al 391 measured the GeO 2 radial concentration in silica glass preforms. 9.9 Chemical state analysis and speciation Soft X-ray fluorescence measurements featured in the literature included a study by Kurmaev et al 392 of a single crystal of organic antiferromagnetic 2,4,6-triphenylverdazyl. C and N Ka X-ray emission lines were measured and compared with X-ray photoelectron valence band spectra and de Mon densityfunction theory calculations.…”