Unusual Coexistence of Nickel(II) and Nickel(IV) in the Quadruple Perovskite Ba4Ni2Ir2O12 Containing Ir2NiO12 Mixed-Metal-Cation Trimers | Zendy

Timothy Ferreira | Zendy; Steve M. Heald | Zendy; Mark D. Smith | Zendy; HansConrad zur Loye | Zendy

Open Access

Unusual Coexistence of Nickel(II) and Nickel(IV) in the Quadruple Perovskite Ba₄Ni₂Ir₂O₁₂ Containing Ir₂NiO₁₂ Mixed-Metal-Cation Trimers

Author(s) -

Timothy Ferreira,

Steve M. Heald,

Mark D. Smith,

HansConrad zur Loye

Publication year - 2018

Publication title -

inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 233

eISSN - 1520-510X

pISSN - 0020-1669

DOI - 10.1021/acs.inorgchem.8b00249

Subject(s) - nickel , chemistry , iridium , metal , crystallography , x ray photoelectron spectroscopy , inorganic chemistry , perovskite (structure) , spectroscopy , crystal structure , infrared spectroscopy , absorption spectroscopy , catalysis , nuclear magnetic resonance , biochemistry , physics , organic chemistry , quantum mechanics

The crystal chemistry and magnetic properties of two hexagonal nickel(IV)-containing perovskites, Ba 4 Ni 1.94 Ir 2.06 O 12 and BaNiO 3 , are reported. The 12R perovskite, Ba 4 Ni 1.94 Ir 2.06 O 12 , possesses an unexpected coexistence of nickel(II) and nickel(IV). This quadruple perovskite structure contains Ir 2 NiO 12 mixed-metal-cation units in which direct metal-metal bonding between nickel(IV) and iridium(V) is inferred. X-ray absorption near-edge spectroscopy and X-ray photoelectron spectroscopy measurements were conducted to confirm the simultaneous presence of nickel(II) and nickel(IV).

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