SYNTHESES WITH NITRILES .96. COLORFORMERS BASED ON PYRAZOLOMALONONITRILES - SYNTHESIS, PROPERTIES AND STRUCTURE - COLOR RELATIONSHIPS

Authors
DWORCZAK R FABIAN WMF BIZA P WEIKMANN M JUNEK H
Citation
R. Dworczak et al., SYNTHESES WITH NITRILES .96. COLORFORMERS BASED ON PYRAZOLOMALONONITRILES - SYNTHESIS, PROPERTIES AND STRUCTURE - COLOR RELATIONSHIPS, Dyes and pigments, 28(4), 1995, pp. 297-315
Citations number
20
Categorie Soggetti
Chemistry Applied
Journal title
Dyes and pigments → ACNP
ISSN journal
01437208
Volume
28
Issue
4
Year of publication
1995
Pages
297 - 315
Database
ISI
SICI code
0143-7208(1995)28:4<297:SWN.CB>2.0.ZU;2-J
Abstract
One-component colorformers were obtained from 4-dicyanomethylene pyraz olone derivatives and anilines or tetramethyl-dihydroquinoline in exce llent yields. They were transformed into dyes of maximum absorption wa velengths between 527 and 628 nm by thermolysis as well as by photolys is. Different substituents and donor elements (anilines and quinoline) showed a remarkable and partially unexpected influence on the dye pro perties and they wee evaluated using semi-empirical quantum chemical c alculations (AMl, CNDO/S-CI).