Photochemical Degradation of Disazo Dyes, R-Salt Derivatives, on Dyed Cotton

Autor:	Krzysztof Wojciechowski, Malgorzata Jedrzejczak
Jazyk:	angličtina
Rok vydání:	2017
Předmět:	aggregation azo-hydrazone tautomerism dicarboxylic acids amides direct dyes lightfastness photochemical degradation on cotton Science Textile bleaching dyeing printing etc. TP890-933
Zdroj:	Journal of Natural Fibers, Vol 14, Iss 3, Pp 346-356 (2017)
Druh dokumentu:	article
ISSN:	1544-0478 1544-046X 15440478
DOI:	10.1080/15440478.2016.1212296
Popis:	Direct disazo dyes, R-salt derivatives, were synthesized and examined. The dyes were prepared by coupling of appropriate components with tetrazotized diacyl derivatives of aromatic diamines. Derivatives of dicarboxylic acids with the general formula HOOC―(CH2)n―COOH (n = 0 ÷ 4) were used as acylating agents. Photochemical degradation rates of dyes on dyed cotton fabric were studied. Compositions of azo-hydrazone tautomers, their aggregates, and their decay rates in UV-Vis light were determined. It was assumed that the length of aliphatic chain in the molecule affects the rate of its photochemical degradation T1/2, tautomeric composition, and dyes aggregation in azo and hydrazo forms.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/4759e2ad5b0442aca969aa29ffcfc3a7 Zobrazit plný text záznamu View record in DOAJ