期刊
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
卷 10, 期 4, 页码 807-816出版社
SPRINGER
DOI: 10.1007/s13738-012-0216-y
关键词
4,4 '-Diaminostilbene-2,2 '-disulphonic acid; Azo-stilbene dyes; CIELAB uniform colour space
资金
- Program 2 of Institute of Chemistry Timisoara of Romanian Academy [2.3]
The synthesis of six new symmetrical disazo direct dyes containing 4,4'-diaminostilbene-2,2'-disulphonic acid as middle component and N-(2-chlorophenyl)-2-hydroxybenzamide, N-(3-chlorophenyl)-2-hydroxybenzamide, N-(4-chlorophenyl)-2-hydroxybenzamide, N-(2-bromophenyl)-2-hydroxybenzamide, N-(3-bromophenyl)-2-hydroxybenzamide, N-(4-bromophenyl)-2-hydroxybenzamide as coupling components is presented. The synthesized dyes were analyzed by thin layer chromatography, electronic spectra and HPLC technique. Their structures were elucidated by FT/IR and 13C-NMR spectroscopy. The CIELAB (1976) colour space was used in all the colour measurements for the six disazo stilbene dyes under the CIE recommended illuminants: D65 (natural day light), A (tungsten light), F2 (fluorescent light) and the standard 10A degrees observer, respectively. The colour differences: Delta Eab* and Delta ECMC were calculated against one standard. The results reveal a good colouring power of the new azo-stilbene dyes.
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