Double heterocyclic tri azene compound and its preparing method and use
A technology for heterocyclic triazenes and compounds, which is applied in the field of compounds containing biheterocyclic triazene structures and their preparation, and can solve problems that need to be improved, few fluorescence detection, and large interference of coexisting ions, and achieve stable performance , high sensitivity, low cost effect
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Embodiment 1
[0015] (1) Add 3.0mL of concentrated hydrochloric acid to the flask, slowly add 10.0mL of aqueous solution dissolved with 0.7g of sodium nitrite under stirring at -15°C, and then dropwise add Suspension, and accelerated stirring, reacted for 30 minutes, so that the diazotization is complete, to obtain the diazonium salt solution;
[0016] (2) Dissolve 1.5g of 2-aminobenzothiazole in 10mL of ethanol, slowly add the above-mentioned diazonium salt solution under stirring at -15°C, adjust the pH to 7-8 with saturated sodium carbonate solution during this period, react for 2 hours, and statically Place overnight, filter with suction, wash with water and ethanol successively. The dried crude product was recrystallized twice with N,N-dimethylformamide:ethanol (2:3) to obtain brown-red pure product BBTAB.
[0017] The elemental analysis, infrared spectrum and nuclear magnetic resonance spectrum test are consistent with the target product.
Embodiment 2
[0019] Fluorescent detection of Cu(II) by the fluorescent reagent 1,3-bis(2-benzothiazolediazoamino)benzene (BBTAB) containing biheterocyclic triazene structure in alkaline medium in the presence of β-CD and its its application.
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