3D Porous Metal−Organic Framework Exhibiting Selective Adsorption of Water over Organic Solvents

Gu, Jin‐Zhong; Lu, Wen-Guan; Jiang, Long; Zhou, Hong‐Cai; Lu, Tong‐Bu

doi:10.1021/ic7004908

Cited by 127 publications

(62 citation statements)

References 45 publications

(10 reference statements)

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“…14c and d demonstrate that water-1-propanol and water-2-propanol mixtures of azeotropic compositions can be separated with Co(pbdc). Analogous water-selective separations of water-alcohol mixtures are possible with CID-1, 34 Cu-GLA, 35 Zn(II)-MOF, 36,37 and JUC-110; 38 detailed analyses are provided in the ESI. †…”

Section: Separation Of Mixtures Of Water and Alcohols With Co(pbdc)mentioning

confidence: 99%

Separating mixtures by exploiting molecular packing effects in microporous materials

Krishna

2015

Phys. Chem. Chem. Phys.

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We examine mixture separations with microporous adsorbents such as zeolites, metal-organic frameworks (MOFs) and zeolitic imidazolate frameworks (ZIFs), operating under conditions close to pore saturation. Pore saturation is realized, for example, when separating bulk liquid phase mixtures of polar compounds such as water, alcohols and ketones. For the operating conditions used in industrial practice, pore saturation is also attained in separations of hydrocarbon mixtures such as xylene isomers and hexane isomers. Separations under pore saturation conditions are strongly influenced by differences in the saturation capacities of the constituent species; the adsorption is often in favor of the component with the higher saturation capacity.Effective separations are achieved by exploiting differences in the efficiency with which molecules pack within the ordered crystalline porous materials. For mixtures of chain alcohols, the shorter alcohol can be preferentially adsorbed because of its higher saturation capacity. With hydrophilic adsorbents, water can be selectively adsorbed from water-alcohol mixtures. For separations of o-xylene-m-xylene-p-xylene mixtures, the pore dimensions of MOFs can be tailored in such a manner as to allow optimal packing of the isomer that needs to be adsorbed preferentially. Subtle configurational differences between linear and branched alkane isomers result in significantly different packing efficiencies within the pore topology of MFI, AFI, ATS, and CFI zeolites. A common characteristic feature of most separations that are reliant on molecular packing effects is that adsorption and intra-crystalline diffusion are synergistic; this enhances the separation efficiencies in fixed bed adsorbers.

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Section: Separation Of Mixtures Of Water and Alcohols With Co(pbdc)mentioning

confidence: 99%

Separating mixtures by exploiting molecular packing effects in microporous materials

Krishna

2015

Phys. Chem. Chem. Phys.

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“…29 Finally, other MOFs are stable only in the presence of water and loose their porosity reversibly upon dehydration. 27,28 In a recent study, we have described the successful formation of new MOF/GO composites with HKUST-1 as the water-stable MOF component. 31 The increased porosity of the 5 composites compared to the parent materials as well as the known affinity of ammonia for copper, 32 make these materials potential adsorbents for ammonia.…”

Section: Introductionmentioning

confidence: 99%

Reactive Adsorption of Ammonia on Cu-Based MOF/Graphene Composites

2010

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New composites based on HKUST-1 and graphene layers are tested for ammonia adsorption at room temperature in both dry and moist conditions. The materials are characterized by Xray diffraction, FT-IR spectroscopy, adsorption of nitrogen and thermal analyses. Unlike other MOF/GO composites reported in previous studies, these materials are water stable. Ammonia adsorption capacities on the composites are higher than the ones calculated for the physical mixture of components, suggesting the presence of a synergetic effect between the MOF and graphene layers. The increased porosity and dispersive forces being the consequence of the presence of graphene layers are responsible for the enhanced adsorption. In addition to its retention via physical forces, ammonia is also adsorbed via binding to the copper sites in * To whom correpondance should be addressed. Telephone: 212-650-6017. Fax: 212-650-6107. E-mail: tbandosz@ccny.cuny.edu. 2HKUST-1 and then, progressively, via reaction with the MOF component. This reactive adsorption is visible through two successive changes of the adsorbents' color during the breakthrough tests. More ammonia is adsorbed in moist conditions than in dry conditions owing to its dissolution in a water film present in the pore system.

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“…Several fascinating complexes with imidazole-4,5-dicarboxylate have been isolated [1][2][3].Thus, we chose 2-ethyl-1H-imidazole-4,5-dicarboxylic acid to obtain anew Fe(II) complex under hydrothermal conditions. In theasymmetric unit of the title complex ,thereare one H 2 …”

Section: Methodsmentioning

confidence: 99%

Crystal structure of [diaquabis(4-carboxy-2-ethyl-1H-imidazole-5- carboxylato-) k2N3,O4)iron(II)] — N,N-dimethylformamide (1:2), Fe(C7H7N2O4)2(H2O)2 · 2C3H7NO

E-Yu¹,

Chen²

2011

Zeitschrift Für Kristallographie - New Crystal Structures

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3D Porous Metal−Organic Framework Exhibiting Selective Adsorption of Water over Organic Solvents

Cited by 127 publications

References 45 publications

Separating mixtures by exploiting molecular packing effects in microporous materials

Separating mixtures by exploiting molecular packing effects in microporous materials

Reactive Adsorption of Ammonia on Cu-Based MOF/Graphene Composites

Crystal structure of [diaquabis(4-carboxy-2-ethyl-1H-imidazole-5- carboxylato-) k2N3,O4)iron(II)] — N,N-dimethylformamide (1:2), Fe(C7H7N2O4)2(H2O)2 · 2C3H7NO

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