New 1,2,4-triazole-based azo-azomethine dyes. Part I: Synthesis, characterization and spectroscopic studies
作者:Hamid Khanmohammadi、Malihe Erfantalab
DOI:10.1016/j.saa.2011.09.053
日期:2012.2
4-triazole-based azo-azomethine dyes were synthesized via condensation of 3,5-diamino-1,2,4-triazole with azo-coupled o-vanillin precursors. The prepared dyes were characterized by IR, UV–vis and 1H NMR spectroscopic methods as well as elemental analyses. Thermal properties of the prepared dyes were examined by thermogravimetric analysis. Results indicated that the framework of the dyes was stable up to 225 °C
通过将3,5-二氨基-1,2,4-三唑与偶氮偶联的邻香兰素前体缩合,合成了四种新的基于1,2,4-三唑的偶氮-甲亚胺染料。通过IR,UV-vis和1 H NMR光谱法以及元素分析对制备的染料进行了表征。通过热重分析检查制备的染料的热性能。结果表明,染料的骨架在高达225°C的温度下是稳定的。此外,还研究了各种因素(包括时间和DMSO / EtOH混合溶液)对染料的UV-vis光谱的影响。