Evaluation of Methods and Conditions for Targeted Synthesis of Metal Organic MIL-100(Fe) Type Frameworks with Catalytic and Antimicrobial Properties
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In this study, preparation of metal-organic frameworks with the MIL-100(Fe) type (general composition [Fe 3 + 3 O 2- (ОН) 1- (C 6 H 3 (COO) 1- 3 ) 2 (H 2 O W ) 2 ]⋅ n H 2 O ([Fe 3 + 3 O 2- (ОН) 1- (BTC) 3- 2 )(H 2 O W ) 2 ]⋅ n H 2 O), FeBTC) was performed by two different methods (hydrothermal in autoclave and open reactor synthesis) by changing synthesis parameters (precursor, solvent, pH, temperature and duration, sediment treatment). Characterization of the samples was performed by X-ray powder diffractometry, Fourier transform infrared spectroscopy, Differential scanning calorimetry, Scanning/Transmission electron microscopy with Energy-Dispersive X-ray microanalysis, Small-angle X-ray scattering, Low-temperature nitrogen adsorption (BET). Based on the results of the FeBTС characterization, the highest phenylacetylene conversion for the selective production of styrene was achieved for sample with the largest unit cell parameter, smaller particle sizes and a large specific surface. Whereas the high antimicrobial activity against Pseudomonas aeruginosa bacteria was found in the sample with the lowest values of the unit cell parameter, specific and micropore surface, pore and micropore volumes and with water molecules and residual H 3 BTC in the extra-framework space. The role of the composition and structure of bacteria in the manifestation of biocidal properties was discussed. The revealed correlations make it possible to tune and vary the characteristics and properties of FeBTC samples of the MIL-100(Fe) type.
