one with mno 4 - Rare earth europium coordination polymer with detection function and preparation method thereof
A technology of coordination polymer and rare earth, applied in the field of chemistry, can solve the problem of less coordination polymer, and achieve the effects of high thermal stability temperature, high sensitivity and mild reaction conditions
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[0050] Coordination polymer [Eu(L) provided by the invention 3 (H 2 O) 2 ] n The preparation method has the advantages of simple process, mild reaction conditions, cheap and easy-to-obtain raw materials, and the solvent used is water, which will not pollute the environment. The preparation method specifically includes the following steps:
[0051] Step1: Mix europium nitrate hexahydrate, 3-methyl-4-cyanobenzoic acid and water at a molar ratio of 1:1:400-500, and stir evenly to obtain a mixed solution;
[0052] Step2: Seal the mixed solution in the reaction kettle, heat it to 140-160°C, and keep it for 60-96 hours;
[0053] Step3: Cool the reactor to room temperature at a cooling rate of 5-8°C / h to obtain colorless blocky crystals.
Embodiment 1
[0055] Step1: mix europium nitrate hexahydrate, 3-methyl-4-cyanobenzoic acid and water in a molar ratio of 1:1:400, stir evenly to obtain a mixed solution;
[0056] Step2: Seal the mixture in the reaction kettle, heat it to 140°C, and keep it for 96 hours;
[0057] Step3: Cool the reactor to room temperature at a cooling rate of 5°C / h to obtain colorless blocky crystals.
[0058] After detection, the colorless blocky crystals are coordination polymers [Eu(L) 3 (H 2 O) 2 ] n .
[0059] After calculation, the coordination polymer [Eu(L) 3 (H 2 O) 2 ] n The yield was 63%.
Embodiment 2
[0061] Step1: mix europium nitrate hexahydrate, 3-methyl-4-cyanobenzoic acid and water at a molar ratio of 1:1:450, and stir evenly to obtain a mixed solution;
[0062] Step2: Seal the mixture in the reaction kettle, heat it to 150°C, and keep it for 80h;
[0063] Step3: Cool the reactor to room temperature at a cooling rate of 5°C / h to obtain colorless blocky crystals.
[0064] After detection, the colorless blocky crystals are coordination polymers [Eu(L) 3 (H 2 O) 2 ] n .
[0065] After calculation, the coordination polymer [Eu(L) 3 (H 2 O) 2 ] n The yield was 65%.
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