Electronic Structures of Transition-Metal Pernitrides Studied Using X-ray Absorption and Photoelectron Spectroscopy

High pressure synthesis and the valence state of vanadium ions for the novel transition metal pernitride, CuAl2-type VN2

“…For transition metal pernitrides, although there have been many first-principle studies regarding the electronic, bonding, and valence states, [4][5][6] there have been only a few experimental studies using X-ray photoelectron spectroscopy and soft X-ray absorption spectroscopy. [7][8][9] Therefore, more quantitative experimental studies to reveal the valence state of metal elements in pernitrides are required.…”

“…23 In theoretical prediction, a single-bonded [N 2 ] 4− unit exists in PtN 2 and OsN 2 . 4,9 Therefore, VN 2 also may have an single-bonded [N 2 ] 4− unit, and vanadium ions in VN 2 are predicted to be V 4+ . To reveal the valence state of vanadium in VN 2 , hard X-ray absorption spectroscopy (XAS) measurements were conducted at the BL5S1 22 and BL11S2 at the Aichi Synchrotron Radiation Center.…”