Preparation method and application of hypochloric acid-responsive fluorescence sensing material
A technology of fluorescent sensing and hypochlorous acid, which is applied in the field of chemical fluorescent sensing materials, can solve problems such as unsatisfactory detection limit and low fluorescence quantum yield, and achieve sensitive and selective recognition performance, large optical performance, and detection low limit effect
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[0031] Example 1: Preparation of hypochlorous acid-responsive fluorescent chemical sensing material
[0032] Weigh 0.81 g of 6-carboxycoumarin and 0.92 g of thiosemicarbazide into a round bottom flask, add 5 mL of anhydrous methanol to dissolve, and heat at 80°C for 4 hours. Filter while hot, recrystallize the filtrate, filter with suction, and wash three times with 5 mL of anhydrous methanol to obtain a white solid.
Example Embodiment
[0033] Example 2: Preparation of hypochlorous acid-responsive fluorescent chemical sensing material
[0034] Weigh 1.19g of 6-carboxycoumarin and 1.84g of thiosemicarbazide into a round bottom flask, add 15mL of anhydrous methanol to dissolve, and heat at 100°C for 6h. Filter while hot, recrystallize the filtrate, filter with suction, and wash three times with 15 mL of anhydrous methanol to obtain a white solid.
Example Embodiment
[0035] Example 3: Preparation of hypochlorous acid-responsive fluorescent chemical sensing material
[0036] Weigh 1 g of 6-carboxycoumarin and 1.38 g of thiosemicarbazide into a round bottom flask, add 10 mL of anhydrous methanol to dissolve, and heat at 90° C. for 5 hours. Filter while hot, recrystallize the filtrate, filter with suction, and wash with 10 mL of anhydrous methanol three times to obtain a white solid.
[0037] Such as figure 1 Shown is a schematic diagram of the synthesis process of hypochlorous acid-responsive fluorescent sensing materials.
[0038] Such as figure 2 Shown is the infrared spectrum of the fluorescent sensing material. FT-IR(KBr,cm -1 ): 3369,3264,3178,1745,1684,1645,1618,1568,1532,1421,1374,1317,1286,1227,1207,1165,999,802,770,647. The functional groups of fluorescent sensing materials can be determined by infrared spectroscopy.
[0039] Such as image 3 with Figure 4 Shown are the fluorescent sensing materials 1 H NMR and 13 C NMR chart. 1 H NMR(D...
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