Experimental and theoretical studies of azo derivatives in terms of different donors, acceptors and position isomerism: Synthesis, characterization and a combined electronic absorption, electrochemical and DFT study
作者:Keerthi Mohan A、Aiswarya Purushothaman、Deepa Janardanan、Karickal R. Haridas
DOI:10.1016/j.molstruc.2021.131621
日期:2022.2
Eight azo derivatives with two donor groups- diphenylamine and N,N-dimethylphenyl, and four acceptor groups - 3-nitrophenyl, 4-nitrophenyl, 4-phenylcarboxylic acid, and 3-phenylcarboxylic acid, were synthesized and characterized using 1H-NMR and HRMS spectroscopies. Both experimental and computational vibrational spectroscopic analyses of the derivatives have been performed. Solvatochromism in different
使用1H-NMR 和 HRMS 光谱。已经进行了导数的实验和计算振动光谱分析。已经通过计算和实验研究了不同溶剂极性下的溶剂致变色。我们还对选定的染料进行了电化学研究。从循环伏安法和紫外-可见吸收光谱,计算了染料的 HOMO 和 LUMO 能量,并与计算结果进行了比较,发现它们是相当一致的。染料的质子化研究表明,染料的中性和质子化形式在不同极性的溶剂中吸收不同。可以借助差分脉冲伏安法实验来解释不同溶剂中的这种异常现象。我们的研究表明,分子的 HOMO 能级在非极性 DCM 溶剂中的能量向上移动,这减小了带隙并导致吸收的红移。热稳定性研究表明,所有染料至少在 220 °C 之前都非常稳定。