Polyoxopalladate-Loaded Metal–Organic Framework (POP@MOF): Synthesis and Heterogeneous Catalysis

Bhattacharya, Saurav; Ayass, Wassim W.; Taffa, Dereje H.; Nisar, Talha; Balster, Torsten; Hartwig, Andreas; Wagner, Veit; Wark, Michael; Kortz, Ulrich

doi:10.1021/acs.inorgchem.0c00875

Cited by 31 publications

(13 citation statements)

References 90 publications

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“…The SiW 12 diffraction peaks in the PXRD pattern of SiW 12 @NU-1000 are not visible as POM moieties occupy the pores of NU-1000 and are not present on the surface of MOF. These results are in agreement with the related literature data. − The characterization by PXRD can also be affected by the crystallinity decline of SiW 12 when incorporated into SiW 12 @NU-1000. However, the diffraction peaks of both components were observed in the PXRD pattern of the physical mixture of SiW 12 and NU-1000 (Figure S1, SI).…”

Section: Resultssupporting

confidence: 92%

Postsynthetic Modification of NU-1000 for Designing a Polyoxometalate-Containing Nanocomposite with Enhanced Third-Order Nonlinear Optical Performance

et al. 2022

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For the advancement of laser technologies and optical engineering, various types of new inorganic and organic materials are emerging. Metal−organic frameworks (MOFs) reveal a promising use in nonlinear optics, given the presence of organic linkers, metal cluster nodes, and possible delocalization of π-electron systems. These properties can be further enhanced by the inclusion of solely inorganic materials such as polyoxometalates as prospective low-cost electron-acceptor species. In this study, a novel hybrid nanocomposite, namely, SiW 12 @NU-1000 composed of SiW 12 (H 4 SiW 12 O 40 ) and Zrbased MOF (NU-1000), was assembled, completely characterized, and thoroughly investigated in terms of its nonlinear optical (NLO) performance. The third-order NLO behavior of the developed system was assessed by Z-scan measurements using a 532 nm laser. The effect of two-photon absorption and self-focusing was significant in both NU-1000 and SiW 12 @NU-1000. Experimental studies suggested a much superior NLO performance of SiW 12 @NU-1000 if compared to that of NU-1000, which can be assigned to the charge-energy transfer between SiW 12 and NU-1000. Negligible light scattering, good stability, and facile postsynthetic fabrication method can promote the applicability of the SiW 12 @NU-1000 nanocomposite for various optoelectronic purposes. This research may thus open new horizons to improve and enhance the NLO performance of MOF-based materials through π-electron delocalization and compositing metal−organic networks with inorganic molecules as electron acceptors, paving the way for the generation of novel types of hybrid materials for prospective NLO applications.

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Section: Resultssupporting

confidence: 92%

Postsynthetic Modification of NU-1000 for Designing a Polyoxometalate-Containing Nanocomposite with Enhanced Third-Order Nonlinear Optical Performance

et al. 2022

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“…The adsorption isotherms of all samples reveal stepwise N 2 -upstake up to p / p 0 value of about 0.3, which can be attributed to the presence of various kinds of pores in the as-synthesized MIL-101 series MOFs and their supported Pd NP composites. In addition, the position of N 2 -upstake steps for MOF-supported Pd NP samples does not display a shift toward left that could be an indicative of the encapsulation of Pd NPs inside the cages, which signifies that Pd NPs are loaded onto the surface of MIL-101 series matrices. This fact is also demonstrated by their similar pore size distribution curves (Figure b, inset).…”

Section: Resultsmentioning

confidence: 99%

Metal–Organic Framework Surface Functionalization Enhancing the Activity and Stability of Palladium Nanoparticles for Carbon–Halogen Bond Activation

Feng

Zhai

et al. 2022

Inorg. Chem.

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Supported metal nanocatalyst is one of the efficient tools for organic transformations. However, catalyst deactivation caused by the migration, aggregation, and leaching of active metal species in the reaction process remains challenging. Herein, a metal–organic framework (MOF), MIL-101, was employed to covalently graft the PPh3 ligand on its surface and then supported palladium nanoparticles (Pd NPs), affording Pd/MIL-101-PPh3. A variety of spectral characterizations and DFT calculation reveal that there is an electron-donating effect of the MOF surface PPh3 toward Pd NPs, which markedly boosts the activation of the carbon-halogen bond in aryl halides. Consequently, Pd/MIL-101-PPh3 exhibits excellent activity for the three-component reaction of 2-iodoaniline, CO2, and isocyanide, as well as Suzuki–Miyaura and Heck coupling reactions, far exceeding amino-functionalized Pd/MIL-101-NH2, naked Pd/MIL-101, and other commercial-supported Pd catalysts. Furthermore, Pd/MIL-101-PPh3 can also frustrate the migration, aggregation, and leaching of reactive Pd species in the reaction process due to the molecular fence effect generated by MOF surface functionalization.

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“…Metal–organic frameworks (MOFs) are self-assembled hybrid materials obtained through the coordination effect from organic bridge ligands and metal ions. At present, MOFs have been generally applied to a variety of fields, such as catalysis, 25 adsorption, 26 drug delivery, 27 biosensing, and so on. 28 On account of some advantages of MOF materials, such as high porosity, adjustable pore size, low density and large surface area, the application of inorganic hybrid materials that combine MOFs with nanoparticles has become a new research direction.…”

Section: Introductionmentioning

confidence: 99%

Self-assembled nanoplatforms with ZIF-8 as a framework for FRET-based glutathione sensing in biological samples

Ding

Zhao

et al. 2022

Analyst

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Polyoxopalladate-Loaded Metal–Organic Framework (POP@MOF): Synthesis and Heterogeneous Catalysis

Cited by 31 publications

References 90 publications

Postsynthetic Modification of NU-1000 for Designing a Polyoxometalate-Containing Nanocomposite with Enhanced Third-Order Nonlinear Optical Performance

Postsynthetic Modification of NU-1000 for Designing a Polyoxometalate-Containing Nanocomposite with Enhanced Third-Order Nonlinear Optical Performance

Metal–Organic Framework Surface Functionalization Enhancing the Activity and Stability of Palladium Nanoparticles for Carbon–Halogen Bond Activation

Self-assembled nanoplatforms with ZIF-8 as a framework for FRET-based glutathione sensing in biological samples

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