Magnetic putamen MOFs compound drug-loading system of pillararene nano-valve controlled-release, preparation method and application thereof
A columnarene and magnetic technology, applied in the field of composite drug-loading systems, to achieve the effects of strong designability, convenient preparation, and high drug loading efficiency
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Embodiment 1
[0040] Based on Fe 3 o 4 Preparation of functional cores of nanoparticles
[0041] FeCl in a nitrogen atmosphere 3 ·6H 2 O (11.68g) and FeCl 2 4H 2 O (4.30g) was dissolved in 200mL of ultrapure water, stirred at 500rpm at 85°C for 2h, and then 40mL of NH with a volume fraction of 25% was added 3 ·H 2 O, stirred at 500 rpm for 1 h at 85°C. After the reaction is completed, cool to room temperature, magnetically separate, wash with water and ethanol once, and dry to obtain Fe 3 o 4 Nanoparticles. SEM characterization illustrates Fe in embodiment 1 3 o 4 Nanoparticle size is 10-15nm, such as figure 1 (A).
Embodiment 2
[0043] Preparation of magnetic MOFs materials
[0044] Get the Fe in embodiment 1 3 o 4 Nanoparticles (50mg) were dispersed in 5mL of polyvinylpyrrolidone (25mg) in DMF solution, ultrasonically reacted for 1h; zirconium tetrachloride (25.17mg) and 2-aminoterephthalic acid (19.47mg) were dissolved in DMF (10mL ), and then sequentially added to the above mixed solution, the resulting mixed solution was transferred to the reaction kettle for 12 hours at 80°C and 24 hours at 100°C, after the reaction was completed, the sample was cooled to room temperature, magnetically separated, and then washed with DMF and ethanol The magnetic MOFs material (Fe 3 o 4 @UiO-66) with a mass of 100mg.
Embodiment 3
[0046] Preparation of Linker Molecule 1-(6-Bromohexane)pyridine Bromide (Py)
[0047] Add 10 mL of 1,6-bromohexane to 100 mL of CH 2 Cl 2 1 mL of pyridine was slowly added dropwise to the above mixture, refluxed at 70°C for 36 h, cooled, distilled under reduced pressure, and dried to obtain Py molecules.
[0048] (Py): 1 H NMR (500MHz,D 2 O) δ8.86(d, J=6.1Hz, 2H), 8.56(t, J=7.9Hz, 1H), 8.09(t, J=7.0Hz, 2H), 4.64(t, J=7.3Hz, 2H ), 3.51(t, J=6.7Hz, 2H), 2.15–1.99(m, 2H), 1.95–1.78(m, 2H), 1.50(m, J=7.4Hz, 2H), 1.39(m, J= 7.9Hz, 2H). 1 H NMR spectrum as figure 2 .
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