The Spectra of Flames Supported by Fluorine

R. A. Durie
1952 Proceedings of the Royal Society A  
Plates 1 and 2] Part I . Flames with organic substances. Fluorine reacts with most organic substances, the reaction being accompanied by a flame. The spectra of several of these flames are described. The hydrocarbon/fluorine flames emit C2 and CH bands. The organic halide/fluorine flames emit a yellow-green continuum, but the gradual addition of hydrogen causes first heavy carbon formation, "which then decreases as C2 bands, then CH begin to appear until, finally, only C2 and CH bands are
more » ... CH bands are emitted. The 4050 A comet-head group of bands appear in these flames under conditions giving carbon formation and strong C2 and weak CH. The similarity of the spectra of the hydrocarbon/fluorine and hydrocarbon/oxygen flames and the possible mechanisms for carbon and C2 and CH formation in these flames are dis cussed. The possible identity of the emitter of the 4050 A comet-head group is discussed. Pa/rtll. Flames with inorganic substances. The reactions of fluorine with many inorganic substances are accompanied by flames. The spectra of the fluorine-supported flames with hydrogen, sulphur, water and ammonia have been studied. Sulphur is a persistent impurity in the hydrogen flame which proves to be a good source for the SH(0, 0) emission band. The water flame emits the oxygen Schumann-Rung© bands with unusual appearance due to a low rotational temperature; the vibrational intensity distribution of the Schumann-Rung© bands in this source has been studied and is found to agree quite well with the theoretically predicted distribution. The ammonia flame emits new bands in addition to the NH(0,0) band at 3360 A; these bands are identical with those observed in hydrogen azide explosions and their assignment to the NH radical is thus supported.
doi:10.1098/rspa.1952.0028 fatcat:54upzixugva33lsmcvw544rhwe