Pertechnetate

The structure of the technetate(VII) ion

The pertechnetate ion (/pərˈtɛknəteɪt/)[1] is an oxyanion with the chemical formula TcO−
4. It is often used as a convenient water-soluble source of isotopes of the radioactive element technetium (Tc). In particular it is used to carry the 99mTc isotope (half-life 6 hours) which is commonly used in nuclear medicine in several nuclear scanning procedures.

Pertechnetate is poorly hydrated as [TcO4(H2O)n]- and [TcO4(H2O)n-m]-[H3O]+m (n = 1–50, m = 1–4) clusters that have been demonstrated by simulation with DFT. First hydration shell of TcO4- is asymmetric and contains no more than 7 water molecules. Only three of the four oxygen atoms of TcO4- form hydrogen bonds with water molecules.[2]

A technetate(VII) salt is a compound containing this ion. Pertechnetate compounds are salts of technetic(VII) acid. Pertechnetate is analogous to permanganate but it has little oxidizing power. Pertechnetate has higher oxidation power than perrhenate.[3]

Understanding pertechnetate is important in understanding technetium contamination in the environment and in nuclear waste management.[3]

  1. ^ "pertechnetate". Merriam-Webster.com Dictionary. Merriam-Webster.
  2. ^ Ustynyuk, Yuri A.; Gloriozov, Igor P.; Zhokhova, Nelly I.; German, Konstantin E.; Kalmykov, Stepan N. (November 2021). "Hydration of the pertechnetate anion. DFT study". Journal of Molecular Liquids. 342: 117404. doi:10.1016/j.molliq.2021.117404. ISSN 0167-7322.
  3. ^ a b Cite error: The named reference weaver17 was invoked but never defined (see the help page).