Применение политетрафторэтилена для дозиметрического контроля по данным ЯМР 19F

2021 ◽  
Vol 7 ◽  
pp. 52-56
Author(s):  
А.Ю. Гермов ◽  
К.Н. Михалёв ◽  
Р.В. Скорюнов ◽  
И.И. Мильман ◽  
Р.М. Абашев ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Nmr Spectra ◽  
Absorbed Dose ◽  
19F Nmr ◽  
Radiation Doses ◽  
19F Nmr Spectra ◽  
Nmr Spectrum ◽  
Nmr Method ◽  
Spectrum Width

The 13C, 19F NMR spectra of the initial and irradiated polytetrafluoroethylene samples were studied in the range of gamma radiation doses up to 50 kGy. In this range, the 19F NMR spectrum width increases linearly with an increase in the absorbed dose. It is concluded that it is possible to control technological doses by the NMR method using polytetrafluoroethylene as a detector.

Darstellung, 11B-und 19F-NMR-Spektren des Monofluoropentaiodo- closo-hexaboratanions sowie Kristallstruktur von (CH2Py2)[B6FI5]/ Synthesis, 11B and 19F NMR Spectra of the Monofluoropentaiodo-closo-hexaborate Anion and the Crystal Structure of (CH2Py2)[B6FI5]

1998 ◽  
Vol 53 (8) ◽  
pp. 829-832 ◽  
Author(s):  
H. Thomsen ◽  
W. Preetz
Keyword(s):  
Crystal Structure ◽  
Nmr Spectra ◽  
19F Nmr ◽  
Coupling Constant ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
19F Nmr Spectra ◽  
Nmr Spectrum ◽  
X Ray ◽  
Excess Iodine

Abstract By reaction of closo-[B6H5F]2- in alkaline solution with excess iodine the monofluoropentaiodo- closo-hexaborate anion [B6FI5]2- is formed in good yield. The crystal structure of (CH2Py2)[B6FI5] has been determined by single crystal X-ray diffraction analysis (orthorhombic, space group Pnma, a = 13.803(2), b = 11.759(2), c = 13.936(2) Å, Z = 4). The B-F-bond length is 1.41 Å, the B-I distances range from 2.13 to 2.17 Å, the B-B distances from 1.69 to 1.76 A. According to the C4v point symmetry the 11B NMR spectrum of the anion exhibits three singlets at +3.8,-30.1 and-33.3 ppm with the intensity ratio 1:4:1, the 19F NMR spectrum one quartet at -247.6 ppm with the coupling constant 1J (19F, 11B) = 54 Hz.

19F NMR spectra of 1,2-dihaloperfluoropropanes

1972 ◽  
Vol 6 (2) ◽  
pp. 200-208 ◽  
Author(s):  
A De Marco ◽  
G Gatti
Keyword(s):  
Nmr Spectra ◽  
19F Nmr ◽  
19F Nmr Spectra

Automated analysis and simulation of 19F-NMR-spectra

1985 ◽  
Vol 29 (1-2) ◽  
pp. 191
Author(s):  
Gerhard Hägele ◽  
Winfried Boenigk ◽  
Michael Engelhardt
Keyword(s):  
Nmr Spectra ◽  
Automated Analysis ◽  
19F Nmr ◽  
19F Nmr Spectra

Theoretical studies of the conformations and 19F NMR spectra of linear and a branched perfluorooctanesulfonamide (PFOSAmide)

Chemosphere ◽  
2007 ◽  
Vol 69 (8) ◽  
pp. 1213-1220 ◽  
Author(s):  
P. Liu ◽  
J.D. Goddard ◽  
G. Arsenault ◽  
J. Gu ◽  
A. McAlees ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
19F Nmr ◽  
Theoretical Studies ◽  
19F Nmr Spectra

The prediction of the 19F NMR spectra of fluoro-substituted arenetricarbonylchromium complexes

1992 ◽  
Vol 191 (2) ◽  
pp. 189-196 ◽  
Author(s):  
B. Armstrong ◽  
A. Grier ◽  
J.B. Hamilton ◽  
H. Khuu ◽  
C.A.L. Mahaffy ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
19F Nmr ◽  
19F Nmr Spectra ◽  
Arenetricarbonylchromium Complexes

Calculation of fluorine chemical shift tensors for the interpretation of oriented 19F-NMR spectra of gramicidin A in membranes

2009 ◽  
Vol 11 (32) ◽  
pp. 7048 ◽  
Author(s):  
Ulrich Sternberg ◽  
Marco Klipfel ◽  
Stephan L. Grage ◽  
Raiker Witter ◽  
Anne S. Ulrich
Keyword(s):  
Chemical Shift ◽  
Nmr Spectra ◽  
Gramicidin A ◽  
19F Nmr ◽  
19F Nmr Spectra ◽  
Chemical Shift Tensors
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