通过红外表征测试其官能团，通过分析官能团的增加和减少来证明反应发生。取602A用乙醇/二氯甲烷稀释后滴到以溴化钾压成的基片上，放置烘箱60℃，1h，而后进行红外光谱测试。测试602A在不同溶剂中红外表征是否有区别。

Its functional groups are tested by infrared characterization, and the reaction occurs by analyzing the increase and decrease of functional groups. 602A was diluted with ethanol/dichloromethane and dropped onto a substrate pressed with potassium bromide, placed in an oven at 60 °C, 1h, and then subjected to infrared spectroscopy testing. Test whether 602A differs in infrared characterization in different solvents.