Faculty of Science, Department of Chemistry, Arak University, Arak 38156-8-8349, Iran.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Feb;86:39-43. doi: 10.1016/j.saa.2011.09.053. Epub 2011 Oct 2.
Four new 1,2,4-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 (1)H 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. Also, the influence of various factors including time and mixed DMSO/EtOH solution on UV-vis spectra of the dyes were investigated.
四种新的基于 1,2,4-三唑的偶氮-亚甲胺染料通过 3,5-二氨基-1,2,4-三唑与偶氮-邻香草醛前体缩合合成。通过红外光谱、紫外可见光谱和 (1)H NMR 光谱以及元素分析对所制备的染料进行了表征。通过热重分析研究了所制备的染料的热性能。结果表明，染料的骨架在 225°C 以下稳定。此外，还研究了时间和混合 DMSO/EtOH 溶液等各种因素对染料紫外可见光谱的影响。
