lsF NMR linewidth studies of polycrystalhe lead fluoride (PbF3 in the femperature range -50% to L9O"C reveal line-narrowing above -10Β°C. This is analysed in tens of vacancy diffusion. Lead fluoride (PbFZ) is known to have o+-~orhombic structure f I] up to 200Β°C above which it undergoes a phase trans
Nuclear magnetic resonance study of 19F diffusion in lead difluoride
β Scribed by T.Y. Hwang; M. Engelsberg; I.J. Lowe
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 355 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
relaxation time measurements as a function of temperature in pure and NaF doped samples of PbF2 xe reported. The doped samples exhibit pronounced motional narrowing at low temperatures due to tk lligh 19F diffusivity.
π SIMILAR VOLUMES
The lgF nuclear magnetic relaxation times and line-widths have been measured in polycrystalline CsPbF3 imthe temperature range from -1.5D Lo +300Β°C. The observed motional nxrowing of the NhlR line-width at low temperatures and the tempernture dependences of the rehxation times are nnalysed in terms
## Abstract __In vivo__ ^19^F NMR measurements of trifluorinated neuroleptics in the rat brain were made using a 13 Γ 18 mm surface coil at 4.7 T. The signal of fluphenazine was obtained within 8β15 min from brains of living rats treated chronically with drug doses of 5β30 mg/kg. Following the intr
In viuo 'q NMR measurements of the fluorinated neuroleptic melperone [4'-fluoro-4-(4-methyIpiperidino)butyrophenone hydrochloride] in the rat brain were performed using a geometrically optimized surface coil at 4.7T. It was possible for the first time to detect a signal of a monofluorinated neurolep
## Abstract The ^13^C and ^19^F (when appropriate) chemical shifts of a variety of diβ, triβ and tetrasubstituted methanes of the type CH~2~XCOOEt (I), CHXYCOOEt (II) and CXYZCOOEt (III), where the substituents X, Y and Z are F, Br, OEt, OPh, SEt, SPh and NO~2~, were determined. The prediction of t