We have examined the local 3d electronic structures of Co-Au multinuclear complexes with the medicinal molecules D-penicillaminate (D-pen) [Co{Au(PPh3)(D-pen)}2]ClO4 and [Co3{Au3(tdme)(D-pen)3}2] by Co L_2,3-edge soft X-ray absorption (XAS) spectroscopy, where PPh3 denotes triphenylphosphine and tdme stands for 1,1,1-tris[(diphenylphosphino)methyl]ethane. The Co L_2,3-edge XAS spectra indicate the localized ionic 3d electronic states in both materials. The experimental spectra are well explained by spectral simulation for a localized Co ion under ligand fields with the full multiplet theory, which verifies that the ions are in the low-spin Co3+ state in the former compound and in the high-spin Co2+ state in the latter.
@article{arxiv.1603.04590,
title = {Local 3d Electronic Structures of Co-Based Complexes with Medicinal Molecules Probed by Soft X-Ray Absorption},
author = {Kohei Yamagami and Hidenori Fujiwara and Shin Imada and Toshiharu Kadono and Keisuke Yamanaka and Takayuki Muro and Arata Tanaka and Takuma Itai and Nobuto Yoshinari and Takumi Konno and Akira Sekiyama},
journal= {arXiv preprint arXiv:1603.04590},
year = {2017}
}
Comments
7 pages, 5 figures. To be published in J. Phys. Soc. Jpn