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Photoegradation of indigo in dichloromethane solution
- Source :
- Coloration Technology. 119:121-127
- Publication Year :
- 2003
- Publisher :
- Wiley, 2003.
-
Abstract
- The photodegradation of indigo has been studied with emphasis on the degradation products. Ultraviolet-visible spectrometry, high performance liquid chromatography and direct temperature-resolved mass spectrometry were employed for the characterisation of aged samples. Indigo, isatin, isatoic anhydride, anthranilic acid and indirubin were detected, together with other unidentified compounds. A new degradation product, tryptanthrin, was identified by both high performance liquid chromatography and mass spectrometry techniques, and two other possible degradation products have also been suggested. The degradation of synthetic and natural indigo has been compared and an explanation for the higher rate of degradation of natural indigo proposed.
- Subjects :
- Chromatography
Materials Science (miscellaneous)
General Chemical Engineering
Isatin
Mass spectrometry
High-performance liquid chromatography
Indigo
chemistry.chemical_compound
symbols.namesake
chemistry
Chemistry (miscellaneous)
symbols
Anthranilic acid
Baeyer–Drewson indigo synthesis
Photodegradation
Dichloromethane
Subjects
Details
- ISSN :
- 14784408 and 14723581
- Volume :
- 119
- Database :
- OpenAIRE
- Journal :
- Coloration Technology
- Accession number :
- edsair.doi...........d087d492524efab8b86d5a319107eadb