Heteronuclear MOFs as well as preparation method and application thereof
A kind of heterokaryon and purpose technology, applied in the field of heterokaryon MOFs and their preparation
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Embodiment 1
[0039] Example 1: Preparation and detection of heterokaryotic MOFs
[0040] Weigh 5-(1-hydroimidazol-1-yl) isophthalic acid (58mg, 0.25mmol) and place it in the reactor of 15mL, add the DMA of 2mL and 9mL H 2 O was uniformly stirred at room temperature for 20 min, and Zn(OAc) was added. 2 ·2H 2 O (330 mg, 1.8 mmol) and Eu (CH 3 COO) 3 ·4H 2O (409.7 mg, 1 mmol) was stirred to dissolve, then formic acid was added to adjust the pH. After stirring at room temperature for 10 min, it was put into a 170° C. oven for 72 hours, and then taken out and slowly cooled to room temperature. The reaction solution was filtered and washed with DMA and H 2 O washed three times to obtain white crystals, yield 0.066 g, yield 41.05%. Dry the white crystals in a blast drying oven at 200°C for 3 hours before use.
[0041] Figure 4 shows {[ZnEu(L) 2 (HL)(H 2 O)]·6.75(H 2 O)} n The single crystal thermogravimetric curve. It can be seen from the weight loss curve of the complex that the c...
Embodiment 2
[0043] Example 2: Cellulose Grafted Polycaprolactone
[0044] Weigh a certain amount of banana cellulose nanofibers (BNCF) and ionic liquid AmimCl with an analytical balance and add them to a dry three-necked flask, and dissolve under magnetic stirring for 2 hours at 80 °C. The dissolution process requires nitrogen protection. After dissolving, the temperature is raised to the reaction temperature. Add ε-caprolactone, {[ZnEu(L) 2 (HL)(H 2 O)]·6.75(H 2 O)} n The reaction was carried out under nitrogen protection. After the reaction time is up, pour it out into a beaker after cooling to room temperature, and use isopropanol to remove the reaction catalyst and unreacted monomers. Add isopropanol to the beaker, stir and let it stand for precipitation, pour out the upper layer solution, continue to pour in isopropanol, let it stand after stirring, pour out the upper layer solution, repeat this until the upper layer solution is colorless, put the last solution into the beaker. ...
Embodiment 3
[0049] Put the weighed lactide into the solvent storage bottle, add the catalyst {[ZnEu(L) 2 (HL)(H 2 O)]·6.75(H 2 O)} n and purified D,L-lactide, L-lactide, alternately vacuumize on the Schlenk device, fill with high-purity nitrogen to replace the air three times, and then put the sealed solvent storage bottle into the silicone oil with the set temperature The polymerization reaction was carried out in the bath. After reaching the required reaction time, the solvent storage bottle was removed from the oil bath. After cooling for a while, a certain amount of acetone terminator was added to completely dissolve the product, and the product was poured into 200 mL of industrial alcohol for precipitation for 24 hours and then filtered. The obtained polymer was washed several times with absolute ethanol, and then dried under vacuum to constant weight.
[0050] Figure 9 shows the polylactic acid product 1 HNMR spectrum, chemical shift δ=1.59-1.61ppm (peak a) multiplet, which is...
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