Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 28, Issue 63, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202201738
Keywords
hydrothermal; oxoanions; technetium; X-ray; XANES
Categories
Funding
- Fonds der Chemischen Industrie (FCI)
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The preparation, characterization, and general investigation of novel technetium oxides are important. The recent discovery of the new technetium oxide [TcO3N] and the determination of its crystal structure and vibrational properties are significant findings.
The preparation of novel technetium oxides, their characterization and the general investigation of technetium chemistry are of significant importance, since fundamental research has so far mainly focused on the group homologues. Whereas the structure chemistry of technetium in strongly oxidizing media is dominated by the [TcO4](-) anion, our recent investigation yielded the new [TcO3N](2-) anion. Brown single crystals of Ba[TcO3N] were obtained under hydrothermal conditions starting from Ba(OH)(2)center dot 8H(2)O and NH4[TcO4] at 200 degrees C. Ba[TcO3N] crystallizes in the monoclinic crystal system with the space group P2(1)/n (a = 7.2159(4) angstrom, b = 7.8536(5) angstrom, c = 7.4931(4) angstrom and beta = 104.279(2)degrees). The crystal structure of Ba[TcO3N] consists of isolated [TcO3N](2-) tetrahedra, which are surrounded by Ba2+ cations. XANES measurements complement the oxidation state +VII for technetium and Raman spectroscopic experiments on Ba[TcO3N] single crystals exhibit characteristic Tc-O and Tc-N vibrational modes.
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