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Banglin Chen - One of the best experts on this subject based on the ideXlab platform.

  • molecular sieving of ethylene from ethane using a rigid Metal Organic Framework
    Nature Materials, 2018
    Co-Authors: R Krishna, Hui Wu, Wei Zhou, Libo Li, Haolong Zhou, Chaohui He, Shun Li, Jinping Li, Banglin Chen
    Abstract:

    There are great challenges in developing efficient adsorbents to replace the currently used and energy-intensive cryogenic distillation processes for olefin/paraffin separation, owing to the similar physical properties of the two molecules. Here we report an ultramicroporous Metal–Organic Framework [Ca(C4O4)(H2O)], synthesized from calcium nitrate and squaric acid, that possesses rigid one-dimensional channels. These apertures are of a similar size to ethylene molecules, but owing to the size, shape and rigidity of the pores, act as molecular sieves to prevent the transport of ethane. The efficiency of this molecular sieve for the separation of ethylene/ethane mixtures is validated by breakthrough experiments with high ethylene productivity under ambient conditions. This material can be easily synthesized at the kilogram scale using an environmentally friendly method and is water-stable, which is important for potential industrial implementation. The strategy of using highly rigid Metal–Organic Frameworks with well defined and rigid pores could also be extended to other porous materials for chemical separation processes. Separating ethylene from ethane is highly challenging as they have very similar physical properties. Here, a Metal–Organic Framework is reported that, owing to its pore size and rigidity, adsorbs ethylene but almost completely excludes ethane under ambient conditions.

  • ordered macro microporous Metal Organic Framework single crystals
    Science, 2018
    Co-Authors: Kui Shen, Lei Zhang, Xiaodong Chen, Lingmei Liu, Daliang Zhang, Yu Han, Junying Chen, Jilan Long, Rafael Luque, Banglin Chen
    Abstract:

    We constructed highly oriented and ordered macropores within Metal-Organic Framework (MOF) single crystals, opening up the area of three-dimensional–ordered macro-microporous materials (that is, materials containing both macro- and micropores) in single-crystalline form. Our methodology relies on the strong shaping effects of a polystyrene nanosphere monolith template and a double-solvent–induced heterogeneous nucleation approach. This process synergistically enabled the in situ growth of MOFs within ordered voids, rendering a single crystal with oriented and ordered macro-microporous structure. The improved mass diffusion properties of such hierarchical Frameworks, together with their robust single-crystalline nature, endow them with superior catalytic activity and recyclability for bulky-molecule reactions, as compared with conventional, polycrystalline hollow, and disordered macroporous ZIF-8.

  • a ketone functionalized luminescent terbium Metal Organic Framework for sensing of small molecules
    Chemical Communications, 2015
    Co-Authors: Xuezhi Song, Guodong Qian, Hailong Wang, Shengqun Su, Hui Xu, Hongjie Zhang, Banglin Chen
    Abstract:

    A ketone functionalized luminescent terbium Metal–Organic Framework has been realized for the highly selective and sensitive sensing of aniline.

  • enantioselective ring opening of meso epoxides by aromatic amines catalyzed by a homochiral Metal Organic Framework
    ChemInform, 2014
    Co-Authors: Sridhar Regati, Shengchang Xiang, Banglin Chen, Muralidhara Thimmaiah, John C G Zhao
    Abstract:

    A novel chiral Metal—Organic Framework (MOF) is prepared and tested as a catalyst for the enantioselective ring-opening of meso-epoxides (I) and (IV) with anilines (II).

  • a highly sensitive mixed lanthanide Metal Organic Framework self calibrated luminescent thermometer
    Journal of the American Chemical Society, 2013
    Co-Authors: Xingtang Rao, Yuanjing Cui, Banglin Chen, Junkuo Gao, Yu Yang, Tao Song, Guodong Qian
    Abstract:

    A new mixed lanthanide Metal–Organic Framework thermometer Tb0.9Eu0.1PIA with the significantly high sensitivity of 3.53% per K has been realized by making use of an Organic ligand, 5-(pyridin-4-yl)isophthalate, with higher triplet state energy.

Guodong Qian - One of the best experts on this subject based on the ideXlab platform.

Jeffrey R Long - One of the best experts on this subject based on the ideXlab platform.

  • enhanced ethylene separation and plasticization resistance in polymer membranes incorporating Metal Organic Framework nanocrystals
    Nature Materials, 2016
    Co-Authors: Jonathan E Bachman, Zachary P Smith, Jeffrey R Long
    Abstract:

    The dispersion of Metal–Organic Framework nanocrystals within a polyimide yields membranes for selective chemical separations with strong resistance to plasticization.

  • conductivity doping and redox chemistry of a microporous dithiolene based Metal Organic Framework
    Chemistry of Materials, 2010
    Co-Authors: Yoji Kobayashi, Enjami W Jacobs, Mark D Allendorf, Jeffrey R Long
    Abstract:

    The new microporous Metal−Organic Framework Cu[Ni(pdt)2] (pdt2− = pyrazine-2,3-dithiolate) is demonstrated to have an optical bandgap, p-type semiconductivity, and redox activity. The compound can be doped by using I2 as an oxidant, leading to an increase in conductivity by 4 orders of magnitude with retention of porosity.

  • size selective lewis acid catalysis in a microporous Metal Organic Framework with exposed mn2 coordination sites
    Journal of the American Chemical Society, 2008
    Co-Authors: Satoshi Horike, Mircea Dincǎ, Kentaro Tamaki, Jeffrey R Long
    Abstract:

    Treatment of selected aldehydes and ketones with cyanotrimethylsilane in the presence of the microporous Metal-Organic Framework Mn3[(Mn4Cl)3BTT8(CH3OH)10]2 (1, H3BTT = 1,3,5-benzenetristetrazol-5-yl) leads to rapid conversion to the corresponding cyanosilylated products. The transformation is catalyzed by coordinatively unsaturated Mn2+ ions that serve as Lewis acids and lead to conversion yields of 98 and 90% for benzaldehyde and 1-naphthaldehyde, the highest thus far for a Metal-Organic Framework. Larger carbonyl substrates cannot diffuse through the pores of 1, and conversion yields are much lower for these, attesting to the heterogeneity of the reaction and its dependence on guest size. The Mukaiyama−aldol reaction, known to require much more active Lewis catalysts, is also catalyzed in the presence of 1, representing the first such example for a Metal-Organic Framework. Conversion yields obtained for the reaction of selected aldehydes with silyl enolates reach 63%, on par with those obtained with ze...

  • hydrogen storage in a microporous Metal Organic Framework with exposed mn2 coordination sites
    Journal of the American Chemical Society, 2006
    Co-Authors: Mircea Dinca, Anne Dailly, Yun Liu, Craig M Brown, D A Neumann, Jeffrey R Long
    Abstract:

    Use of the tritopic bridging ligand 1,3,5-benzenetristetrazolate (BTT3-) enables formation of [Mn(DMF)6]3[(Mn4Cl)3(BTT)8(H2O)12]2·42DMF·11H2O·20CH3OH, featuring a porous Metal−Organic Framework with a previously unknown cubic topology. Crystals of the compound remain intact upon desolvation and show a total H2 uptake of 6.9 wt % at 77 K and 90 bar, which at 60 g H2/L provides a storage density 85% of that of liquid hydrogen. The material exhibits a maximum isosteric heat of adsorption of 10.1 kJ/mol, the highest yet observed for a Metal−Organic Framework. Neutron powder diffraction data demonstrate that this is directly related to H2 binding at coordinatively unsaturated Mn2+ centers within the Framework.

Joseph T. Hupp - One of the best experts on this subject based on the ideXlab platform.

  • Metal-adeninate vertices for the construction of an exceptionally porous Metal-Organic Framework
    Nature Communications, 2012
    Co-Authors: Jihyun An, Omar K. Farha, Joseph T. Hupp, Ehmke Pohl, Nathaniel L. Rosi
    Abstract:

    Metal‐Organic Framework (MOFs) with Metal‐carboxylate cluster vertices and long, branched Organic linkers are highly porous. An et al . develop an alternative route to MOFs in which Metal‐biomolecule clusters are used as vertices to construct a mesoporous MOF. Metal-Organic Frameworks comprising Metal-carboxylate cluster vertices and long, branched Organic linkers are the most porous materials known, and therefore have attracted tremendous attention for many applications, including gas storage, separations, catalysis and drug delivery. To increase Metal-Organic Framework porosity, the size and complexity of linkers has increased. Here we present a promising alternative strategy for constructing mesoporous Metal-Organic Frameworks that addresses the size of the vertex rather than the length of the Organic linker. This approach uses large Metal-biomolecule clusters, in particular zinc-adeninate building units, as vertices to construct bio-MOF-100, an exclusively mesoporous Metal-Organic Framework. Bio-MOF-100 exhibits a high surface area (4,300 m^2 g^−1), one of the lowest crystal densities (0.302 g cm^−3) and the largest Metal-Organic Framework pore volume reported to date (4.3 cm^3 g^−1).

  • Metal adeninate vertices for the construction of an exceptionally porous Metal Organic Framework
    Nature Communications, 2012
    Co-Authors: Omar K. Farha, Joseph T. Hupp, Ehmke Pohl, Joanne I Yeh, Nathaniel L. Rosi
    Abstract:

    Metal‐Organic Framework (MOFs) with Metal‐carboxylate cluster vertices and long, branched Organic linkers are highly porous. An et al. develop an alternative route to MOFs in which Metal‐biomolecule clusters are used as vertices to construct a mesoporous MOF.

  • active site accessible porphyrinic Metal Organic Framework materials
    Journal of the American Chemical Society, 2011
    Co-Authors: Omar K. Farha, Sonbinh T Nguyen, Abraham M Shultz, Amy A Sarjeant, Joseph T. Hupp
    Abstract:

    On account of their structural similarity to cofactors found in many Metallo-enzymes, Metalloporphyrins are obvious potential building blocks for catalytically active, Metal−Organic Framework (MOF) materials. While numerous porphyrin-based MOFs have already been described, versions featuring highly accessible active sites and permanent microporosity are remarkably scarce. Indeed, of the more than 70 previously reported porphyrinic MOFs, only one has been shown to be both permanently microporous and contain internally accessible active sites for chemical catalysis. Attempts to generalize the design approach used in this single successful case have failed. Reported here, however, is the synthesis of an extended family of MOFs that directly incorporate a variety of Metalloporphyrins (specifically Al3+, Zn2+, Pd2+, Mn3+, and Fe3+ complexes). These robust porphyrinic materials (RPMs) feature large channels and readily accessible active sites. As an illustrative example, one of the manganese-containing RPMs is ...

  • selective bifunctional modification of a non catenated Metal Organic Framework material via click chemistry
    Journal of the American Chemical Society, 2009
    Co-Authors: Tendai Gadzikwa, Omar K. Farha, Joseph T. Hupp, Christos D Malliakas, Mercouri G Kanatzidis, Sonbinh T Nguyen
    Abstract:

    A noncatenated, Zn-based Metal−Organic Framework (MOF) material bearing silyl-protected acetylenes was constructed and postsynthetically modified using “click” chemistry. Using a solvent-based, selective deprotection strategy, two different Organic azides were “clicked” onto the MOF crystals, resulting in a porous material whose internal and external surfaces are differently functionalized.

  • covalent surface modification of a Metal Organic Framework selective surface engineering via cui catalyzed huisgen cycloaddition
    Chemical Communications, 2008
    Co-Authors: Tendai Gadzikwa, Joseph T. Hupp, Charlotte L Ste, Sco R Wilso, Sonbinh T Nguye
    Abstract:

    A Zn-cornered, mixed-ligand, Metal–Organic Framework (MOF) bearing TMS-protected acetylenes has been constructed and its surface decorated with Organic molecules via‘click chemistry’, in a demonstration of selective post-synthesis functionalization.

Omar K. Farha - One of the best experts on this subject based on the ideXlab platform.

  • h5pv2mo10o40 polyoxoMetalate encapsulated in nu 1000 Metal Organic Framework for aerobic oxidation of a mustard gas simulant
    ACS Applied Nano Materials, 2020
    Co-Authors: Cassandra T Buru, Megan C Wasson, Omar K. Farha
    Abstract:

    The immobilization of H5PV2Mo10O40 polyoxoMetalates (POMs) in the in the mesoporous channel-type Metal–Organic Framework (MOF), NU-1000, via simple impregnation method is reported here. Characteriz...

  • air oxidation of sulfur mustard gas simulants using a pyrene based Metal Organic Framework photocatalyst
    Beilstein Journal of Nanotechnology, 2019
    Co-Authors: Ghada Ayoub, Mihails Arhangelskis, Xuan Zhang, Florencia A Son, Timur Islamoglu, Tomislav Friscic, Omar K. Farha
    Abstract:

    We demonstrate a microporous Metal-Organic Framework NU-400 based on a 2,7-disubstituted pyrene linker as a highly efficient photosensitizer for generating singlet oxygen and subsequent oxidative degradation of chemical warfare agents (CWAs). The high activity of NU-400 permits photocatalytic conversion of the 2-chloroethyl ethyl sulfide (CEES) mustard gas simulant into a benign sulfoxide derivative, in air, with less than 15 minutes' half-life. This is a considerable improvement to NU-1000, based on a 1,3,6,8-tetrasubstituted pyrene unit, demonstrating how variation of the substitution pattern of a Metal-Organic Framework linker permits modification of its photoactive behavior.

  • Metal-adeninate vertices for the construction of an exceptionally porous Metal-Organic Framework
    Nature Communications, 2012
    Co-Authors: Jihyun An, Omar K. Farha, Joseph T. Hupp, Ehmke Pohl, Nathaniel L. Rosi
    Abstract:

    Metal‐Organic Framework (MOFs) with Metal‐carboxylate cluster vertices and long, branched Organic linkers are highly porous. An et al . develop an alternative route to MOFs in which Metal‐biomolecule clusters are used as vertices to construct a mesoporous MOF. Metal-Organic Frameworks comprising Metal-carboxylate cluster vertices and long, branched Organic linkers are the most porous materials known, and therefore have attracted tremendous attention for many applications, including gas storage, separations, catalysis and drug delivery. To increase Metal-Organic Framework porosity, the size and complexity of linkers has increased. Here we present a promising alternative strategy for constructing mesoporous Metal-Organic Frameworks that addresses the size of the vertex rather than the length of the Organic linker. This approach uses large Metal-biomolecule clusters, in particular zinc-adeninate building units, as vertices to construct bio-MOF-100, an exclusively mesoporous Metal-Organic Framework. Bio-MOF-100 exhibits a high surface area (4,300 m^2 g^−1), one of the lowest crystal densities (0.302 g cm^−3) and the largest Metal-Organic Framework pore volume reported to date (4.3 cm^3 g^−1).

  • Metal adeninate vertices for the construction of an exceptionally porous Metal Organic Framework
    Nature Communications, 2012
    Co-Authors: Omar K. Farha, Joseph T. Hupp, Ehmke Pohl, Joanne I Yeh, Nathaniel L. Rosi
    Abstract:

    Metal‐Organic Framework (MOFs) with Metal‐carboxylate cluster vertices and long, branched Organic linkers are highly porous. An et al. develop an alternative route to MOFs in which Metal‐biomolecule clusters are used as vertices to construct a mesoporous MOF.

  • active site accessible porphyrinic Metal Organic Framework materials
    Journal of the American Chemical Society, 2011
    Co-Authors: Omar K. Farha, Sonbinh T Nguyen, Abraham M Shultz, Amy A Sarjeant, Joseph T. Hupp
    Abstract:

    On account of their structural similarity to cofactors found in many Metallo-enzymes, Metalloporphyrins are obvious potential building blocks for catalytically active, Metal−Organic Framework (MOF) materials. While numerous porphyrin-based MOFs have already been described, versions featuring highly accessible active sites and permanent microporosity are remarkably scarce. Indeed, of the more than 70 previously reported porphyrinic MOFs, only one has been shown to be both permanently microporous and contain internally accessible active sites for chemical catalysis. Attempts to generalize the design approach used in this single successful case have failed. Reported here, however, is the synthesis of an extended family of MOFs that directly incorporate a variety of Metalloporphyrins (specifically Al3+, Zn2+, Pd2+, Mn3+, and Fe3+ complexes). These robust porphyrinic materials (RPMs) feature large channels and readily accessible active sites. As an illustrative example, one of the manganese-containing RPMs is ...