✦ LIBER ✦

Motional narrowing of 19F nuclear magnetic resonance in lead fluoride

✍ Scribed by M. Mahajan; B.D. Nageswara Rao

Publisher: Elsevier Science
Year: 1971
Tongue: English
Weight: 144 KB
Volume: 10
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(71)80148-3

No coin nor oath required. For personal study only.

✦ Synopsis

lsF NMR linewidth studies of polycrystalhe lead fluoride (PbF3 in the femperature range -50% to L9O"C reveal line-narrowing above -10°C. This is analysed in tens of vacancy diffusion. Lead fluoride (PbFZ) is known to have o+-~orhombic structure f I] up to 200°C above which it undergoes a phase transition to a cubic structure. lgF NhIR linewidth experiments were perfomed on policrystalline PbF, on a Varian-4200 wide line spectrometer operating at 8.0 MHz and equipped with a V-4257 variable temperature accessory. The experimental lincwidths as a function of temperature are shown in fig. 1. The linewidth is found to remain almost constant below -10°C at a value of about

📜 SIMILAR VOLUMES

Nuclear magnetic resonance study of 19F

Nuclear magnetic resonance study of 19F diffusion in lead difluoride

✍ T.Y. Hwang; M. Engelsberg; I.J. Lowe 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 355 KB

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.

Nuclear magnetic resonance study of 19F

Nuclear magnetic resonance study of 19F motion in CsPbF3

✍ V.M. Bouznik; Yu.N. Moskvich; V.N. Voronov 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 298 KB

The lgF nuclear magnetic relaxation times and line-widths have been measured in polycrystalline CsPbF3 imthe temperature range from -1.5D Lo +300°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

Motional narrowing of 13C dipolar magic-

Motional narrowing of 13C dipolar magic-angle-spinning nuclear magnetic resonance spectra

✍ Hiroshi Ohe; Atsushi Kubo; Motomi Katada; Hirotoshi Sano 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 614 KB

The effects of molecular motions on the dipolar coupled j3C magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectra of alkane-urea inclusion compounds and bis(ethylammonium) hexachlorostannate were investigated. The contact time dependences of "C cross-polarization (CP) MAS NMR spectra w

Nuclear magnetic resonance study of atom

Nuclear magnetic resonance study of atomic motions in vanadium

✍ B. Günther; O. Kanert 📂 Article 📅 1983 🏛 Elsevier Science ⚖ 930 KB

In vivo19F nuclear magnetic resonance sp

In vivo19F nuclear magnetic resonance spectroscopy of trifluorinated neuroleptics in the rat

✍ K. Albert; H. Rembold; G. Kruppa; E. Bayer; M. Bartels; G. Schmalzing 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 363 KB

## Abstract __In vivo__ ^19^F NMR measurements of trifluorinated neuroleptics in the rat brain were made using a 13 × 18 mm surface coil at 4.7 T. The signal of fluphenazine was obtained within 8–15 min from brains of living rats treated chronically with drug doses of 5–30 mg/kg. Following the intr

In vivo19F nuclear magnetic resonance of

In vivo19F nuclear magnetic resonance of a monofluorinated neuroleptic in the rat

✍ Ulrich Günther; Klaus Albert 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 415 KB

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