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Mass spectrometric analysis of sulphonated dyes based on diaminobiphenyls
Author(s) -
Volná Kateřina,
Holčapek Michal,
Suwanruji Potjanart,
Freeman Harold S
Publication year - 2006
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2006.00001.x
Subject(s) - chemistry , fragmentation (computing) , mass spectrometry , ion , electrospray ionization , salt (chemistry) , chromatography , organic chemistry , computer science , operating system
The title dyes, a group of new homo‐bireactive disazo reactive dyes having molecular masses of 1000–1400 Da, were developed because of their potential use as low salt, easy wash‐off colorants for cotton. Following dye synthesis from diaminobiphenyls with and without substituents in the 2,2′‐positions, negative‐ion electrospray ionisation mass spectrometry (ESI‐MS) was used to characterise the dyes. The MS obtained were characterised by signals arising from [M − x H] x − ions plus fragment ions produced by cleavage at C–N bonds adjacent to the azo linkage. In addition, better results were produced when J‐acid was the coupler employed rather than H‐acid. The characteristic fragmentation behaviour of the studied dyes is discussed and illustrated on selected example.