Abstract: The 3-methoxydiphenylamine-4-diazonium salt(MDDS) was synthesized using resorcinol and aniline as start materials via six steps with total yield of 36%. The photochemical and thermal decomposition of MDDShave been investigated. It is shown that MDDSexhibit excellent thermostabilities as well as high photosensitive behavior. The thermal decomposition temperature was determined to be 178 ℃ which is about 31 ℃ beyond that of diphenylamine-4-diazonium salt(DS). The thermal decomposition of MDDSin aqueous or ethanol solution was also reported.

Key words: Methoxydiphenylamine-4-diazonium salt, Photo and thermal decomposition, Thermostability