EventsThe 14th International Electronic Conference on Synthetic Organic Chemistry
Event submissions
Published
with-doi10.3390/ecsoc-14-00424
This submission belongs to the session a. General Organic Synthesis of the event The 14th International Electronic Conference on Synthetic Organic Chemistry
Published date
22 Oct, 2010
Citation
Simona G Muntean, Georgeta M Simu, Maria E Grad, Disazo symmetrical stilbene dyes. Synthesis and colour evaluation., in Proceedings of The 14th International Electronic Conference on Synthetic Organic Chemistry, 1 November–30 November 2010, MDPI: Basel, Switzerland, doi: 10.3390/ecsoc-14-00424
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Disazo symmetrical stilbene dyes. Synthesis and colour evaluation.

Simona G Muntean 1
Georgeta M Simu 2
Maria E Grad 1
1. Institute of Chemistry Timisoara of Romanian Academy
2. University of Medicine and Pharmacy Victor Babeş Timişoara, Faculty of Pharmacy
Abstract
The synthesis of two new symmetrical disazo direct dyes containing 4,4'-diaminostilbene-2,2'disulphonic acid as middle component and 3-chlorosalicylanilide and 4-chlorosalicylanilide as coupling components are presented. The synthesized dyes were analyzed by thin layer chromatography (TLC), electronic spectra (VIS) 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 two disazo stilbene dyes under the CIE recommended illuminants: D65 (natural day light), A (tungsten light), F2 (fluorescent light) and the standard 10° observer respectively. The colour difference (ΔEab*) was calculated against one standard
Keywords
Azo-stilbene dyes
CIELAB uniform colour space
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