| Popis: |
The influence of 2-hydroxy ethyl, allyl and benzyl substituents at the nitrogen atom of the arylamino group on the properties of azo dyes derived from 2-(3-toluidino-, or 3-anisidmo)ethyl-N,N,N-trimethylammonium salts as coupling components and 3-nitro-, 4-nitro-, 2-chloro-4-nitro- and 2,6-dichloro-4-nitro-aniline as diazo components was studied. Electronic spectra data for the dyes in 20% ethanol and in sulphuric acid (0.1 and 4 mol litre−1), together with some coloristic properties, are reported. Relationships previously established for dyes derived from 2-phenylaminoethyl-N,N,N-trimethylammonium salts with respect to the effect of the substituent at the nitrogen atom and dye properties are valid for these dyes also. Methyl and methoxyl substituents in the azo component (in an ortho position with respect to the azo group) affect not only the colour, but also the rate of dyebath exhaustion, and thus the dyebath exhaustion properties of these dyes can be varied for specific end-use by appropriate structural modifications of the dyes. |
