Choi, Yun Seok Lee, Kun Su Kim, Hye Jin Choi, Jong Yun Kang, Soon Bang Lee, Eui Jae Keum, Gyochang 2024-01-20T12:34:16Z 2024-01-20T12:34:16Z 2021-09-01 2013-03-20 0253-2964 https://pubs.kist.re.kr/handle/201004/128238 A series of azo disperse dyes having dicyanovinyl groups was synthesized by the Knoevenagel condensation with malononitrile from carbonyl substituted phenylazo disperse dyes which were prepared by conventional diazo coupling reaction of aniline derivatives as diazo components. A variety of coupling components such as anilines, an indole and a pyridone were used. The azo disperse dyes were evaluated for their spectral properties and dyeing assessment on the polyester fabrics. The azo disperse dyes containing dicyanovinyl groups showed bathochromic shifts and darker colors due to increased electron withdrawing strength in their azo components and extended conjugation by dicyanovinyl groups than their parent carbonyl substituted azo dyes. The dyes containing 2-acetylamino-5-methoxy substituent in the coupling component exhibited higher wavelength of maximum absorbance (lambda(max)) and significant negative solvatochromism than those of other dyes due to intramolecular hydrogen bonding. English WILEY-V C H VERLAG GMBH Synthesis, Spectral Property and Dyeing Assessment of Azo Disperse Dyes Containing Carbonyl and Dicyanovinyl Groups Article 10.5012/bkcs.2013.34.3.863 1 BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.34, no.3, pp.863 - 867 BULLETIN OF THE KOREAN CHEMICAL SOCIETY 34 3 863 867 scie scopus kci ART001751981 000317168200031 2-s2.0-84875721264 Chemistry, Multidisciplinary Chemistry Article Azo disperse dyes Extended conjugation Spectral properties Dyeing assessment Dicyanovinyl