Water-soluble phenazine derivative as well as preparation method and application thereof
A derivative and water-soluble technology, applied in the fields of chemical synthesis and anion detection, can solve problems such as thermal equipment scaling, unfavorable power plant safe operation, corrosion, etc., and achieve a wide range of practical effects
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Embodiment 1
[0037] Embodiment 1, the synthesis of phenazine derivatives S1
[0038] (1) Synthesis of 2,3-diaminophenazine: According to the literature [Li.G., Wu.Y.C., Gao.J.K., Wang.C.Y., Li.J.B., Zhang.H.C.J Am Chem Soc.2012,134,20298 .】synthesis. 1 H-NMR(400MHz,DMSO)δ:7.89(s,2H,ph-H),7.54(s,2H,ph-H),6.91(s,2H,ph-H),6.25(s,4H,NH 2 ). figure 1 It is the H NMR spectrum of 2,3-diaminophenazine.
[0039] (2) Synthesis of phenazine derivatives S1: 2mmol 2,3-diaminophenazine, 2mmol 3,4-dihydroxybenzaldehyde, 10ml glacial acetic acid were dissolved in 20ml anhydrous DMF, refluxed, and the temperature of the reaction system was Rising to 165°C, monitored by TLC. The raw materials were reacted for 12 hours, and the reaction was stopped. After the reaction system dropped to room temperature, the reaction solution was poured into 200ml of water (solids were formed), centrifuged, the solids were washed with distilled water, dried, and the crude product was washed with DMF / H 2 O recrystallized,...
Embodiment 2
[0040] Embodiment 2, the synthesis of water-soluble phenazine derivatives S1-Na
[0041] Add 0.25 mmol of S1 to 20 ml of ethanol solution, stir for 10 min, then add 0.5 mmol of NaOH (0.02 g), the solution changes from brown-black to wine red instantly, and continue stirring for 30 min. After the reaction is completed, rotary evaporation is performed to obtain a brown-red or brown-black solid, which is dried in a vacuum oven to obtain the product water-soluble phenazine derivative S1-Na. Figure 4 It is the H NMR spectrum of S1-Na. It can be clearly seen from the figure that compared with the H NMR spectrum of S1, the absorption peaks of the two hydroxyl groups at 9.4-9.9pm disappear, which proves that S1-Na was successfully synthesized.
Embodiment 3
[0042] Example 3, Water-soluble phenazine derivatives S1-Na UV recognition of SiO in aqueous solution 3 2-
[0043] 2.0 x 10 in 3ml -3 mol L -1 Add 60 μL of 4.0×10 -2 mol L -1 different anions (CH 3 COO - , HCOO - , CO 3 2- , SiO 3 2- , SO 4 2- , NO 2 - , HSO 3 - , HCO 3 - , H 2 PO 4 - , F - , Cl - , B r - ). It was found that when the above-mentioned anion solutions were added to the aqueous solution of S1-Na, only SiO 3 2- The addition of ions makes its ultraviolet absorption spectrum red shift to 468nm at 424nm and the absorption peak at 260nm increases, and the addition of other ions hardly changes its ultraviolet absorption spectrum significantly ( Figure 5 ). It is obtained by measuring the ultraviolet absorption spectrum. If the ultraviolet absorption spectrum is red-shifted to 468nm at 424nm and accompanied by an increase in the absorption peak at 260nm, it means that SiO is added. 3 2- , otherwise other ions are added.
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