THE EFFECT OF SUBSTITUENTS O N T H E S P E C T R O S C O P I C A N D DYEING PROPERTIES OF M O N O A Z O A N D METHINE DYES

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dc.contributor.authorAdamu Kari, ISUWA
dc.date.accessioned2014-02-18T12:27:23Z
dc.date.available2014-02-18T12:27:23Z
dc.date.issued1991-09
dc.descriptionBeing a Thesis submitted to the Postgraduate School, in partial fulfillment of the requirements for the award of Master of Science (M.Sc.) Degree in Organic Chemistry, Ahmadu Bello University, Zaria. Department of Chemistry Faculty of Science Ahmadu Bello University Zaria. September, 1991.en_US
dc.description.abstractThe synthesis of azo dyes derived from 2-aminothiazole derivatives was undertaken and their spectroscopic properties in different solvents examined. From the results of the investigation, the incorporation of electron withdrawing group in the acceptor ring of the chromogen gives a bathochromic shift of the visible absorption band, while the incorporation of electron donating group in the same position of the chromogen results in hysochromic effect. The dyes were applied to polyester and nylon fabrics and their fastness characteristics assessed. It was found generally that the dyes are very resistant to alkaline washing and are also suitable for transfer printing. Series of me-thine dyes were also synthesized by condensing highly electronegative active methylene compounds with formerly group of aromatic compounds and the dyes obtained were applied on polyester and nylon fabrics. The co lours obtained are very brilliant, ranging from yellow to green with good resistance to alkaline hydrolysis.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1989
dc.language.isoenen_US
dc.subjectEFFECT,en_US
dc.subjectSUBSTITUENTS,en_US
dc.subjectS P E C T R O S C O P I C A N D,en_US
dc.subjectDYEING,en_US
dc.subjectPROPERTIES,en_US
dc.subjectM O N O A Z O,en_US
dc.subjectMETHINE,en_US
dc.subjectDYESen_US
dc.titleTHE EFFECT OF SUBSTITUENTS O N T H E S P E C T R O S C O P I C A N D DYEING PROPERTIES OF M O N O A Z O A N D METHINE DYESen_US
dc.typeThesisen_US
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