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- W2014499198 abstract "The Raman spectra of fluoro-organic compounds show specific emission bands for carbon-fluorine bonds in the range 500- 800 wave numbers (cm<SUP>-1</SUP>)). With very limited exceptions, biological materials do not contain carbon- fluorine bonds. Fluoro-organic compounds introduced into biological samples can be detected by a Raman emission signal. Normal mode C-F bond bands are observed: (1) at 710- 785 cm <SUP>-1</SUP> for trifluoromethyl groups; (2) at 530-610 cm <SUP>-1</SUP> for aromatic organofluorine bonds; (3) a range centered at 690 cm <SUP>-1</SUP> for difluoromethylene groups. Specific examples of normal mode C-F bond emissions for organofluorine compounds containing trifluoromethyl groups are: 1-bromoperfluorooctane, 726 cm <SUP>-1</SUP>; perfluorodecanoic acid, 730 cm <SUP>-1</SUP>; triperfluoropropylamine, 750 cm <SUP>-1</SUP>; 1,3,5-tris- (trifluoromethyl)-benzene, 730 cm <SUP>-1</SUP>; Fluoxetine (Prozac) commercial powdered pill at 782 cm <SUP>-1</SUP>. Compounds containing aromatic C-F bonds are: hexafluorobenzene, 569 cm <SUP>MIN1</SUP>; pentafluoropyridine, 589 cm <SUP>-1</SUP>. Difluoromethylene groups: perfluorodecalin, 692 cm<SUP>-1</SUP>; perfluorocyclohexane, 691 cm <SUP>-1</SUP>. Raman spectra were observed with a standard single monochromator. The 510.8 nm light source was a copper-vapor laser operated at 3-10 watts with 10-12 nanosecond pulses at 10 kHz repetition rate. Detection was made with a time-gated photomultiplier tube. Resonance Raman spectra were also observed at 255.4 nm, using a frequency doubling crystal. Observed spectra were free of fluorescence with very sharp strong C-F lines." @default.
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- W2014499198 date "1999-02-26" @default.
- W2014499198 modified "2023-09-27" @default.
- W2014499198 title "<title>Detection of carbon-fluorine bonds in organofluorine compounds by Raman spectroscopy using a copper-vapor laser</title>" @default.
- W2014499198 doi "https://doi.org/10.1117/12.341046" @default.
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