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以苯胺、对甲基苯胺、间氯苯胺、水杨醛为原料,采用重氮-偶合反应方法,合成了两种含-C=N的线性偶氮化合物。用核磁共振氢谱、红外光谱、元素分析表征了其结构。将这两个化合物配成浓度1.0×10-5mol/L的DMSO溶液,用125 W高压汞灯照射不同时间后,用Shimadzu UV-2550型紫外可见光谱仪测试其紫外吸收,同时以纯DMSO作参比,这两个化合物分别在345、290 nm处的反式吸收逐渐减弱,在493、428 nm处的顺式吸收逐渐增强,表明这两个化合物有光致变色性质。用125 W高压汞灯短时间照射溶液后,这两个化合物的光致变色不明显,但其反式最大紫外吸光度和光照时间有较好的线性关系。
Using aniline, p-methylaniline, m-chloroaniline and salicylaldehyde as raw materials, two linear azo compounds containing -C = N were synthesized by diazo-coupling reaction. The structure was characterized by 1H-NMR, IR and elemental analysis. The two compounds were dubbed DMSO solution at a concentration of 1.0 × 10-5mol / L and irradiated with a 125 W high-pressure mercury lamp for different time. The UV absorbance was measured by Shimadzu UV-2550 UV-visible spectrophotometer, and pure DMSO was used as a reference , The trans absorption of these two compounds at 345 and 290 nm, respectively, gradually diminished, and the cis absorption at 493 and 428 nm gradually increased, indicating that these two compounds have photochromic properties. The photolochromism of these two compounds was not obvious when the solution was irradiated with 125 W high pressure mercury lamp for a short period of time. However, the trans-maximum UV absorbance had a good linear relationship with the illumination time.