【作者】 朱传方； 徐汉红； 杨尚君；

【Author】 ZHU Chuan-fang;XU Han-hong;YANG Shang-jun Department of Chemistry,Central China Normal University,Wuhan, 430079, China

【机构】 华中师范大学化学系；

【摘要】 本文合成了对氨基偶氮苯席夫碱类的7个化合物并应用物理方法进行了表征。通过加热显微观察这些化合物都具可逆热色性;此外应用和差热分析阐述了这些偶氮苯席夫碱的吸热峰的ΔH(ΔS)与偶氮苯席夫碱结构的关系并估算出了化合物SB(I),SB(V)和SB(VI)的变色峰的表现活化能。更多还原

【Abstract】 In this article, the p-amino azo benzene-Schiff bases arc described and characterized by microanalyticalprocedures, ~1H NMR spectra. All of these Schiff bases are thermochromic. The microanalytical procedures show that the ΔH(ΔS) of these endothermic peaks exhibit the relationship as thefollowing: Ⅳ>Ⅲ>Ⅴ>Ⅵ. The temperature ranges of the color changing peaks appropriately conform to the transitiontemperature ranges in which the SB(Ⅰ), SB(Ⅴ) and SB(Ⅵ) show thermochromism respectively.It can be concluded thatthe SB(Ⅰ), SB(Ⅴ) and SB(Ⅵ) under investigation exist the balance between the phase before color change and thephase after color change. The activation energy ΔE can calculated by a linear relationship from figures that shows theplots of lnK.更多还原