Synthesis, Crystal Structure, and Optical Properties of the Barium meta-Pertechnetate Ba[TcO4]2
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide High-quality single crystals of the colorless title compound Ba[ 99 TcO 4 ] 2 were prepared from radioactive, isotope-pure 99 TcO 2 by oxidation with H 2 O 2 in an aqueous ammonia solution and subsequent cation metathesis using an ion-exchange column. Single-crystal X-ray diffraction revealed Ba[TcO 4 ] 2 to crystallize isotopically to Ba[MnO 4 ] 2 in the orthorhombic space group Fddd with the lattice parameters a = 747.34(5) pm, b = 1244.08(7) pm, and c = 1511.23(9) pm for Z = 8. Its crystal structure features [BaO 12 ] 22– icosahedra surrounded by ten [TcO 4 ] − tetrahedra connected via two edges and eight corners. The optical properties of Ba[TcO 4 ] 2 investigated by UV-vis spectroscopy show the broad O 2– → Tc 7+ ligand-to-metal charge transfer (2p → 4d) process within these discrete [TcO 4 ] − anions at an absorption maximum of around 350 nm.
Source: ACS Omega
Institutions: University of Stuttgart, Colorado School of Mines
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,935
Funder: Basic Energy Sciences
Award: G1239368510
OpenAlex ID: W4409161296