BHNAPPDP and preparation method and application thereof
A technology of naphthalene amino azo group and biphenol, which is applied in the field of bis-triazene compounds, can solve the problems of unsatisfactory sensitivity of reagents, and achieve the effects of high sensitivity, simple preparation method and good stability
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[0031] The present invention provides a 3,3'-bis(2-hydroxyl-1-naphthylaminoazo)-4,4'-bis(2-hydroxyl-1-naphthylaminoazo)-4,4'-bis(3,3'-bis(2-hydroxyl-1-naphthylaminoazo)-4,4'-bis(2-hydroxyl-1-naphthylaminoazo) in order to solve the problem that the sensitivity of the reagents for detecting heavy metal ions in the prior art is not ideal enough. Hydroquinone and its preparation method and application.
[0032] The present invention is realized by the following technical scheme, a 3,3′-bis(2-hydroxy-1-naphthylaminoazo)-4,4′-biphenyldiol (BHNAPPDP for short)
[0033] Its molecular structural formula is:
[0034] .
[0035] 3,3'-bis(2-hydroxyl-1-naphthylaminoazo)-4,4'-diphenol preparation method comprises the following steps (as attached figure 1 shown):
[0036] ① Nitration of 4,4'-biphenyl bisphenol In a 250 mL round bottom flask equipped with a reflux condenser and a dropping funnel, add 75 mL of dichloromethane, and add 4,4'-biphenyl bisphenol 9.5 mL under stirring. g (0.0...
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