Thallium chemical shift referencing
| Autor: | Roy E. Hoffman |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Proton Chemical shift Biophysics Analytical chemistry Ionic bonding chemistry.chemical_element 010402 general chemistry Condensed Matter Physics 01 natural sciences Biochemistry 030218 nuclear medicine & medical imaging 0104 chemical sciences Degree (temperature) Dilution 03 medical and health sciences 0302 clinical medicine chemistry Thallium |
| Zdroj: | Journal of Magnetic Resonance. 326:106944 |
| ISSN: | 1090-7807 |
| DOI: | 10.1016/j.jmr.2021.106944 |
| Popis: | Thallium chemical shifts are very sensitive to chemical and physical conditions. This makes accurate chemical shift referencing difficult. Therefore, chemical shifts are usually referenced to the 1H reference multiplied by a standard factor. However, past papers are referenced to TlNO3 solution in water at infinite dilution. The chemical shift of TlNO3 at infinite dilution is measured accurately and found to be –22.16 and 0.75 ppm for 203Tl and 205Tl, respectively relative to the standard frequency ratios to proton. The behavior of thallium chemical-shift with concentration and temperature are determined and discussed in relation to the degree of ionic association. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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