Highly Luminescent Metal–Organic Frameworks Through Quantum Dot Doping

Abstract

The incorporation of highly luminescent core-shell quantum dots (QDs) within a metal-organic framework (MOF) is achieved through a one-pot method. Through appropriate surface functionalization, the QDs are solubilized within MOF-5 growth media. This permits the incorporation of the QDs within the evolving framework during the reaction. The resulting QD@MOF-5 composites are characterized using X-ray fluorescence, cross-sectional confocal microscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and small-angle X-ray scattering. The synergistic combination of luminescent QDs and the controlled porosity of MOF-5 in the QD@MOF-5 composites is harnessed within a prototype molecular sensor that can discriminate on the basis of molecular size.

Photocatalytic Decontamination of Wastewater Containing Organic Dyes by Metal–Organic Frameworks and their Derivatives

“…Owing to their uniquelyt unable and size-dependent electronic and optical properties, QDs have received significant attention in photocatalysis. [115] The wide absorption bands, narrow ands ymmetrical emission bands,l ow photobleaching, long lifetimes, and high quantum yields of QDs are helpful in generating ah igher redox potential in ap hotocatalytic system. [105b, 116] This allows photonsi nt he spectralr egion where the MOFs have no or little absorption to be harvested.…”

Hybrid metal-organic framework nanomaterials with enhanced carbon dioxide and methane adsorption enthalpy by incorporation of carbon nanotubes

“…With the advantages of the porosity, the large surface areas and the uniform pore characteristics, these MOF materials have great potential for a variety of applications, such as gas storage, chemical separation, catalysis, sensing and drug delivery [19][20][21][22]. Furthermore, owing to the diversity of metal centres and functional ligands, MOF materials offer the opportunity of developing new types of composite materials that may show enhanced gas storage properties or new behaviour compared with the original MOFs [15,[23][24][25][26][27][28][29][30][31].…”

“…With the advantages of the porosity, the large surface areas and the uniform pore characteristics, these MOF materials have great potential for a variety of applications, such as gas storage, chemical separation, catalysis, sensing and drug delivery [19][20][21][22]. Furthermore, owing to the diversity of metal centres and functional ligands, MOF materials offer the opportunity of developing new types of composite materials that may show enhanced gas storage properties or new behaviour compared with the original MOFs [15,[23][24][25][26][27][28][29][30][31].In our previous work, we synthesised a kind of MOF material, Dy(BTC)(H 2 O)·DMF (named JUC-32, JUC = Jilin University, China)[32], which exhibits excellent thermal stability and high carbon dioxide storage capability. We then successfully used JUC-32-Y (replacing the metal Dy with Y) as the host for a hybrid material, by assembling guest molecules of ammonia borane (AB) materials, which exhibited a dramatic improvement in the hydrogen release kinetics, the lower operational temperature and the purity of the released hydrogen [33].…”

Application of metal and metal oxide nanoparticles@MOFs

“…Finally, Falcaro and co-workers demonstrated the size selective detection of ethanethiol compared to a larger linear copolymer n-isopropyl acrylamide/acrylic acid/t-butyl acrylamide mercaptane, by following the quenching effect of luminescent CdSe quantum dots embedded into MOF-5[9,139]. The same group grew MOF-5 around Co NPs and subsequent infiltration with a dye enabled the fabrication of a repositionable sensor for the detection of aromatic amines[140]. a) Schematic illustration of SERS sensing activity of MOF-5 supported Au nanorods.Reproduced from[141].…”