Synthesis and properties of some novel pyrazolone-based heterocyclic azo disperse dyes containing a fluorosulfonyl group
作者:Ajay Singh、Ran Choi、Byunghun Choi、Joonseok Koh
DOI:10.1016/j.dyepig.2012.06.009
日期:2012.12
properties were investigated with respect to the effect of substituents on absorption spectra, halochromism, and solvatochromism. Heteroarylazo disperse dyes, which contain a nitro group instead of a fluorosulfonyl group para to the azo group in the diazo component, were also synthesized for comparative purpose. The fluorosulfonylarylazopyrazolone dyes had absorption maxima at shorter wavelength and showed
合成了一系列由吡唑啉酮和氟磺酰基苯胺衍生的杂芳基偶氮分散染料,并研究了其热和光谱性质,研究了取代基对吸收光谱,卤化和溶剂变色的影响。Heteroarylazo分散染料,其中含有硝基代替氟组对为了比较目的,还合成了重氮组分中的偶氮基团上的α-氨基。氟磺酰基芳基偶氮吡唑酮染料在较短的波长处具有最大吸收,并且显示出比硝基芳基偶氮吡唑酮染料更低的消光系数。合成的染料还表现出正的卤素变色和溶剂变色,因此,随着溶剂的酸度或极性增加,染料的吸收带向更长的波长移动。4-氟磺酰基取代的染料通常显示出比其4-硝基取代的类似物更低的热稳定性,因为重氮组分中较低的吸电子能力倾向于降低极化率和偶极相互作用。