文献类型：期刊文献

英文题名：Synthesis of branched azo dyes based on benzene sulphonamide intermediates and their spectral properties

作者：Wang, Feng[1];Wang, Limin;Cai, Xiaofei;Sun, Yinglei;Su, Lan;Zhang, Liang;Han, Zhaogang;Zhang, Guanjun;Wang, Guifeng

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2012

卷号：128

期号：6

起止页码：425

外文期刊名：COLORATION TECHNOLOGY

收录：;EI(收录号：20124215587030);WOS:【SCI-EXPANDED(收录号:WOS:000309716800002)】；

基金：This research was financially supported by the National Nature Science Foundation of China (20672035) and the Baihehua Group.

语种：英文

外文关键词：Chromophores - Dyeing - Benzene

摘要：Benzene sulphonamide intermediates and two series of branched azo dyes (one series with H-Acid as the coupling component, and the other, with a pyrazolone derivative as the coupling component) derived from them were synthesised. The molecular structures, spectroscopic properties and dyeing properties of the dyes obtained have been investigated. The results indicated that these dyes showed one dominant hue, despite each separate branch of chromophore, and, in the first series, four chromophoric groups led to only a threefold increase in the extinction coefficient, while the same comparison in the second series produced a fully additive effect, i.e. a fourfold increase. Compared with the mono-branch dye of each series, the dyeing properties of the H-Acid series were improved, whereas the pyrazolone series that were run diversely for the two series were synthesised from different coupling components. In addition, the crystallographic structure of the tri-branch intermediate showed a non-coplanar structure, which indicated that the derived dye would perform as the sum of three similar chromophoric units.