Biobutanol Separation with the Metal–Organic Framework ZIF‐8

Cousin-Saint-Remi, Julien; Rémy, Tom; Hunskerken, Vincent Van; Perre, Stijn van de; Duerinck, Tim; Maes, M.; Vos, Dirk De; Gobechiya, Elena; Kirschhock, Christine; Baron, Gino V.; Denayer, Joeri

doi:10.1002/cssc.201100261

Cited by 201 publications

(115 citation statements)

References 38 publications

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“…At the respective threshold pressures, pronounced optical shifts of about 50-60 nm are recorded, which gradually increase up to saturation pressure. The S-shaped isotherms upon methanol and ethanol adsorption recorded for both the single ZIF-8 films and for BS-2 are in good agreement with the results obtained by Remi et al 44 The authors attribute the S-shaped isotherms to changes in the framework triggered by interactions with guest-molecules, which was additionally confirmed and described elsewhere. 42 In contrast to the distinct S-shaped isotherms, isobutanol sorption experiments yield an almost linearly increasing adsorption behavior with an absolute shift of about 100 nm at the highest partial pressure.…”

Section: 32supporting

confidence: 79%

One-dimensional metal–organic framework photonic crystals used as platforms for vapor sorption

et al. 2012

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We present the fabrication of one-dimensional photonic crystals (Bragg stacks) based on a microporous metal-organic framework material and mesoporous titanium dioxide. The Bragg stack heterostructures were obtained using two complementary synthesis approaches utilizing the bottom-up assembly of heterogeneous, i.e. two-component photonic crystal multilayer structures. Zeolitic imidazolate framework ZIF-8 and mesoporous titanium dioxide were chosen as functional components with different refractive indices. While ZIF-8 is intended to impart molecular selectivity, mesoporous TiO 2 is used to ensure high refractive index contrast and to guarantee molecular diffusion within the Bragg stack. The combination of micro-and mesoporosity within one scaffold endows the 1D-MOF PC with characteristic adsorption properties upon exposure to various organic vapors. In this context, the sorption behavior of the photonic material was studied as a function of partial pressure of organic vapors. The results show that the multilayered photonic heterostructures are sensitive and selective towards a series of chemically similar solvent vapors. It is thus anticipated that the concept of multilayer heterogeneous photonic structures will provide a versatile platform for future selective, label-free optical sensors.

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Section: 32supporting

confidence: 79%

One-dimensional metal–organic framework photonic crystals used as platforms for vapor sorption

et al. 2012

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“…A large number of strategies have been studied, but for application, drug-delivery systems must overcome issues surrounding bioavailability,7, 8 the uncontrollable release of drugs (usually due to carrier instability),9, 10, 11 loading capacities,11, 12, 13 particle size,14, 15, 16 nanoparticle cellular internalization routes,14, 17, 18 and toxicity 19, 20. The exceptional storage capacities of metal-organic frameworks (MOFs), together with their robustness and structural tailorability, have made them attractive for a wide variety of applications,21, 22 including several promising breakthroughs in biomedicine 9, 10, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33. One of their main advantages is that their cytotoxicity and properties can be tuned by the thoughtful choice of metal and linkers 20, 34, 35…”

Section: Introductionmentioning

confidence: 99%

Selective Surface PEGylation of UiO-66 Nanoparticles for Enhanced Stability, Cell Uptake, and pH-Responsive Drug Delivery

Lázaro

Haddad

Sacca

et al. 2017

Chem

300

158

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SummaryThe high storage capacities and excellent biocompatibilities of metal-organic frameworks (MOFs) have made them emerging candidates as drug-delivery vectors. Incorporation of surface functionality is a route to enhanced properties, and here we report on a surface-modification procedure—click modulation—that controls their size and surface chemistry. The zirconium terephthalate MOF UiO-66 is (1) synthesized as ∼200 nm nanoparticles coated with functionalized modulators, (2) loaded with cargo, and (3) covalently surface modified with poly(ethylene glycol) (PEG) chains through mild bioconjugate reactions. At pH 7.4, the PEG chains endow the MOF with enhanced stability toward phosphates and overcome the “burst release” phenomenon by blocking interaction with the exterior of the nanoparticles, whereas at pH 5.5, stimuli-responsive drug release is achieved. The mode of cellular internalization is also tuned by nanoparticle surface chemistry, such that PEGylated UiO-66 potentially escapes lysosomal degradation through enhanced caveolae-mediated uptake. This makes it a highly promising vector, as demonstrated for dichloroacetic-acid-loaded materials, which exhibit enhanced cytotoxicity. The versatility of the click modulation protocol will allow a wide range of MOFs to be easily surface functionalized for a number of applications.

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“…As a typical MOF, ZIF‐8 has been well investigated for the adsorption of alcohols in the form of bulk powders as well as thin films . It was found that at high relative pressure the adsorption decreases as the linear alkyl group of the alcohols extends due to limited pore apertures.…”

Section: Resultsmentioning

confidence: 72%

High Performance Hollow Metal–Organic Framework Nanoshell‐Based Etalons for Volatile Organic Compounds Detection

Cheng

et al. 2016

Adv Materials Technologies

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A novel high performance optical metal–organic framework (MOF) sensor is presented by means of hollow MOF nanoshell‐based etalon (HMNSE), which allows for selective volatile organic compound (VOC) detection with distinct color output and high efficiency of optical transduction. The HMNSE is constructed by integrating hollow MOF nanoshell arrays between the reflective surfaces of silicon wafer and metal layer, and features ultrathin shell thickness (<100 nm) and macropores within a submicron thin film, which provides appropriate optical thickness, tunable interference color, and fast mass transport all at one time. Due to the rational design of optical motif, the HMNSE has attained the largest optical response so far for ultrathin MOF toward VOC detection. Selective detection on vapor phase alcohols, ketones, nitriles, cyclohexane/benzene, and xylene isomers has been exhibited, which reflected well the characteristic effect of size exclusion and chemical interaction between the MOF and VOCs. The synergistic combination of enhanced reflectance peak and optical shift has led to visible color change with unprecedented high saturation upon VOC exposure. Wide dynamic range, ultrafast kinetics, and excellent reversibility and stability have also been achieved, rendering HMNSE promising for low‐cost, real‐time, and on‐site detection.

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Biobutanol Separation with the Metal–Organic Framework ZIF‐8

Cited by 201 publications

References 38 publications

One-dimensional metal–organic framework photonic crystals used as platforms for vapor sorption

One-dimensional metal–organic framework photonic crystals used as platforms for vapor sorption

Selective Surface PEGylation of UiO-66 Nanoparticles for Enhanced Stability, Cell Uptake, and pH-Responsive Drug Delivery

High Performance Hollow Metal–Organic Framework Nanoshell‐Based Etalons for Volatile Organic Compounds Detection

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