Bis(8-quinoline diazo amido)-biphenyl, preparation method and application thereof

Abstract

The present invention relates to a heterocyclic di-triazene compound, di-(8-quinoline diazoaminoazobenzene)-biphenyl (BQDADB). 8-aminoquinoline is treated through diazotization by sodium nitrite under the acidic conditions and then reacts with benzidine in the alcohol solution; thus the compound can be prepared. The compound can not only be used as an excellent chromogenic agent, but also can be used as a fluorescent reagent with high sensitivity and high selectivity. And the compound can be used for testing the fluorescence of metal ions, in particular testing the Cu(II) in the alkaline medium.

Description

technical field The invention relates to a fluorescent reagent, in particular to a derivative of a heterocyclic triazene compound, especially a derivative containing a bistriazene structure. The invention also relates to the preparation method and application of the compound. Background technique Due to their strong electron-donating or electron-withdrawing capabilities, organic heterocyclic structures are considered to be effective structures for designing and synthesizing organic molecules with strong two-photon-induced upconversion fluorescence and large two-photon absorption cross-sections (A.Abboto, L.Beverina , R. Bozio, et al, Org. Lett. 2002, 4:95-98). After the triazene structure is deprotonated, it is easy to coordinate with transition metal ions and is a good coordination group (J.Barker, N.D.Cameron, M.Kilner, et al, J.Chem.Soc.Dalton Trans, 1991, 12:34-35), therefore, triazene reagent is an excellent color developer for metal ions such as cadmium, mercury, co...

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