ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Solid polybromide-containing functional polymers were obtained from basic anion-exchange resins. The chloride or hydroxide anions of the commercial resins were exchanged by bromide, then dried under anaerobic conditions and allowed to react with a gaseous bromine phase. The formation of linear, slightly asymmetric tribromides was proved by Raman and far-IR spectroscopy. The tribromide spectra are characterized by the symmetrical stretching vibration ν1 at about 160 cm-1 and the antisymmetric stretching vibration ν3 at about 200 cm-1. If the Br2: Br- molar ratio is greater than 1 an additional band could be observed at about 255 cm-1. This band is assigned to the stretching vibration of coordinated bromine. It is shifted in the direction of free bromine at about 300 cm-1 with increasing bromine content in the functional polymers. According to the spectroscopic results, the anion structure in amorphous polybromide-containing functional polymers can be explained by tribromide ions and bromine molecules interacting with the tribromide. The thermal instability of higher polybromides was also proved spectroscopically.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250221106
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