Ontology highlight
ABSTRACT:
SUBMITTER: Matsumoto Y
PROVIDER: S-EPMC6993455 | biostudies-literature | 2019 Jan
REPOSITORIES: biostudies-literature
Matsumoto Yuki Y Yamamoto Takafumi T Nakano Kousuke K Takatsu Hiroshi H Murakami Taito T Hongo Kenta K Maezono Ryo R Ogino Hiraku H Song Dongjoon D Brown Craig M CM Tassel Cédric C Kageyama Hiroshi H
Angewandte Chemie (International ed. in English) 20181217 3
Square-planar coordinate Ni<sup>2+</sup> ions in oxides are exclusively limited to a low-spin state (S=0) owing to extensive crystal field splitting. Layered oxychalcogenides A<sub>2</sub> Ni<sup>II</sup> O<sub>2</sub> Ag<sub>2</sub> Se<sub>2</sub> (A=Sr, Ba) with the S=1 NiO<sub>2</sub> square lattice are now reported. The structural analysis revealed that the Ni<sup>2+</sup> ion is under-bonded by a significant tensile strain from neighboring Ag<sub>2</sub> Se<sub>2</sub> layers, leading to th ...[more]