Evaluation of the synthetic methods for preparing metal organic frameworks with transition metals

Aguiar, Laís Weber; Silva, Cleiser Thiago Pereira da; Lima, Hugo Henrique Carline de; Moisés, Murilo Pereira; Rinaldi, Andrelson W.

doi:10.3934/matersci.2018.3.467

Cited by 21 publications

(2 citation statements)

References 25 publications

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“…Similar particles have been reported in the case of Cu/Ni‐MOF. [ 37–39 ] Figure 5 shows SEM images of the synthesized NiFe 2 O 4 @SiO 2 samples. In the first part, 500‐nm SiO 2 particles and some tiny spherical particles, which might be related to the NiFe 2 O 4 phase, could be seen.…”

Section: Resultsmentioning

confidence: 99%

NiFe₂O₄@SiO₂@Cu₃(BTC)₂ nanocomposite as a magnetic metal–organic framework

Heydari

Gharagozlou

Ghahari

et al. 2020

Applied Organom Chemis

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A new magnetic metal–organic framework (MOF), namely, NiFe2O4@SiO2@Cu3(BTC)2, was synthesized via an in situ method using Fe(NO3)3, Ni(NO3)2, CuN2O6, TEOS, (3‐aminopropyl)triethoxysilane, and benzene‐1,3,5‐tricarboxylic acid. Three different samples were fabricated according to a formula; xNiFe2O4@(100 − x)SiO2@Cu3(BTC)2, where x = 10, 30, and 50. The integration of the intrinsic characteristic of Cu3(BTC)2 as an MOF with strong magnetic properties of NiFe2O4 could lead to an exquisite material with specific behaviors. X‐ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), diffuse reflectance spectroscopy (DRS), photoluminescence (PL), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM), and simulated thermal analyzer (STA) were utilized to characterize the mentioned samples. Results approved that the synthesized compounds were composed of SiO2 and Cu‐MOF and NiFe2O4 crystalline phases with rod‐like morphology. The similarity between the morphology of the synthesized samples and Cu‐MOF approved that an appropriate fabrication method has been selected. This fact led to observe mesoporous composites with 38–90 m2 g−1 specific surface area. PL spectroscopy confirmed the near bandgap emission, ligand‐to‐metal charge transfer, and metal‐to‐ligand charge transfer. Although all the samples had magnetic hysteresis, the highest magnetization was seen in the 50NiFe2O4@SiO2@Cu3(BTC)2 sample. This composite compound with a magnetization value of 2 emu g−1 at 8000 Oe and a specific surface area of 90 m2 g−1 could be classified as a magnetic MOF (MMOF). STA results suggested that 400°C is the highest operating temperature for this compound.

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Section: Resultsmentioning

confidence: 99%

NiFe₂O₄@SiO₂@Cu₃(BTC)₂ nanocomposite as a magnetic metal–organic framework

Heydari

Gharagozlou

Ghahari

et al. 2020

Applied Organom Chemis

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“…The low crystallinity indicates disorder in the atomic arrangement, leading to non-uniform particle shapes. The morphology was retained post-loading without causing any significant alteration to the external crystal structure, indicating DOX was encapsulated inside the pores and not visible on the external surface [41][42][43][44][45]. Dynamic light scattering was performed to confirm particle size further, as shown in Figures 2c and 3c.…”

Section: Morphologymentioning

confidence: 99%

Microwave-Responsive Metal-Organic Frameworks (MOFs) for Enhanced In Vitro Controlled Release of Doxorubicin

Fatima,

Sabouni,

Husseini

et al. 2024

Nanomaterials

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Metal-organic frameworks (MOFs) are excellent candidates for a range of applications because of their numerous advantages, such as high surface area, porosity, and thermal and chemical stability. In this study, microwave (MW) irradiation is used as a novel stimulus in vitro controlled release of Doxorubicin (DOX) from two MOFs, namely Fe-BTC and MIL-53(Al), to enhance drug delivery in cancer therapy. DOX was encapsulated into Fe-BTC and MIL-53(Al) with drug-loading efficiencies of up to 67% for Fe-BTC and 40% for MIL-53(Al). Several characterization tests, including XRD, FTIR, TGA, BET, FE-SEM, and EDX, confirmed both MOF samples’ drug-loading and -release mechanisms. Fe-BTC exhibited a substantial improvement in drug-release efficiency (54%) when exposed to microwave irradiation at pH 7.4 for 50 min, whereas 11% was achieved without the external modality. A similar result was observed at pH 5.3; however, in both cases, the release efficiencies were substantially higher with microwave exposure (40%) than without (6%). In contrast, MIL-53(Al) exhibited greater sensitivity to pH, displaying a higher release rate (66%) after 38 min at pH 5.3 compared to 55% after 50 min at pH 7.4 when subjected to microwave irradiation. These results highlight the potential of both MOFs as highly heat-responsive to thermal stimuli. The results of the MTT assay demonstrated the cell viability across different concentrations of the MOFs after two days of incubation. This suggests that MOFs hold promise as potential candidates for tumor targeting. Additionally, the fact that the cells maintained their viability at different durations of microwave exposure confirms that the latter is a safe modality for triggering drug release from MOFs.

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Advances in Microwave Synthesis of Nanoporous Materials

et al. 2021

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Usually, porous materials are synthesized by using conventional electric heating, which can be energy‐ and time‐consuming. Microwave heating is commonly used in many households to quickly heat food. Microwave ovens can also be used as powerful devices in the synthesis of various porous materials. The microwave‐assisted synthesis offers a simple, fast, efficient, and economic way to obtain many of the advanced nanomaterials. This review summarizes the recent achievements in the microwave‐assisted synthesis of diverse groups of nanoporous materials including silicas, carbons, metal–organic frameworks, and metal oxides. Microwave‐assisted methods afford highly porous materials with high specific surface areas (SSAs), e.g., activated carbons with SSA ≈3100 m2 g−1, metal–organic frameworks with SSA ≈4200 m2 g−1, covalent organic frameworks with SSA ≈2900 m2 g−1, and metal oxides with relatively small SSA ≈300 m2 g−1. These methods are also successfully implemented for the preparation of ordered mesoporous silicas and carbons as well as spherically shaped nanomaterials. Most of the nanoporous materials obtained under microwave irradiation show potential applications in gas adsorption, water treatment, catalysis, energy storage, and drug delivery, among others.

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Evaluation of the synthetic methods for preparing metal organic frameworks with transition metals

Cited by 21 publications

References 25 publications

NiFe₂O₄@SiO₂@Cu₃(BTC)₂ nanocomposite as a magnetic metal–organic framework

NiFe₂O₄@SiO₂@Cu₃(BTC)₂ nanocomposite as a magnetic metal–organic framework

Microwave-Responsive Metal-Organic Frameworks (MOFs) for Enhanced In Vitro Controlled Release of Doxorubicin

Advances in Microwave Synthesis of Nanoporous Materials

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Evaluation of the synthetic methods for preparing metal organic frameworks with transition metals

Cited by 21 publications

References 25 publications

NiFe2O4@SiO2@Cu3(BTC)2 nanocomposite as a magnetic metal–organic framework

NiFe2O4@SiO2@Cu3(BTC)2 nanocomposite as a magnetic metal–organic framework

Microwave-Responsive Metal-Organic Frameworks (MOFs) for Enhanced In Vitro Controlled Release of Doxorubicin

Advances in Microwave Synthesis of Nanoporous Materials

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NiFe₂O₄@SiO₂@Cu₃(BTC)₂ nanocomposite as a magnetic metal–organic framework

NiFe₂O₄@SiO₂@Cu₃(BTC)₂ nanocomposite as a magnetic metal–organic framework