Europium-based coordination polymer nanosphere and preparation method and application thereof
A technology of coordination polymers and nanospheres, applied in instruments, analytical materials, measuring devices, etc., can solve the problems of limiting the wide application of fluorescence methods, high raw material costs, and complicated synthesis methods, and achieve excellent detection selectivity and low raw material costs. The effect of low cost and simple synthesis method
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[0029] A europium-based coordination polymer nanosphere is prepared by a simple one-step solvothermal method, and its specific preparation method may include the following steps: adding EuCl 3 ·6H 2 O (i.e. europium trichloride crystal), H 2 BDC (that is, terephthalic acid) and polyvinylpyrrolidone (that is, PVP) are added to a mixed solvent of N,N-dimethylformamide (that is, DMF) and absolute ethanol (that is, EtOH), and stirred Until completely dissolving, then the mixed solution is transferred to a reaction kettle with a polytetrafluoroethylene liner, and placed in an oven at 150° C. for 12 hours, thereby preparing a reaction mixture in the reaction kettle in the oven; The reaction mixture is cooled, centrifuged, washed and vacuum-dried in sequence to obtain europium-based coordination polymer nanospheres; the europium-based coordination polymer nanospheres are light gray powder.
[0030] Wherein, the preparation method of the above-mentioned europium-based coordination p...
Embodiment 1
[0039] A europium-based coordination polymer nanosphere is prepared by the following method: 0.2345g of EuCl 3 ·6H 2 O, 0.0192g of H 2 BDC and 1.6g of polyvinylpyrrolidone were added to the mixed solvent mixed with N,N-dimethylformamide and absolute ethanol according to the volume ratio of 5:3, and stirred until completely dissolved, then the mixed solution was transferred into a reaction kettle with a polytetrafluoroethylene liner, and placed in an oven at 150° C. for 12 hours to prepare a reaction mixture in the reaction kettle in the oven. The reaction mixture is naturally cooled to room temperature, and centrifuged at a speed of 3000rpm for 3 to 5 minutes, then the substrate after centrifugation is removed, and the suspension after centrifugation is centrifuged at a speed of 10000rpm for 3 to 5 minutes The re-centrifugation treatment, and then use N,N-dimethylformamide and absolute ethanol to wash the solid after the re-centrifugation treatment several times, and carry o...
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