A5031841140- Metal-Organic Frameworks: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Covalent Organic Framework Applications
- Crystallography and molecular interactions
- Chemical Synthesis and Analysis
- Magnetism in coordination complexes
- Neuroscience and Neuropharmacology Research
- Amino Acid Enzymes and Metabolism
- Carbon Dioxide Capture Technologies
- Receptor Mechanisms and Signaling
- Membrane Separation and Gas Transport
- Zeolite Catalysis and Synthesis
- Carbon dioxide utilization in catalysis
- Porphyrin and Phthalocyanine Chemistry
- Mesoporous Materials and Catalysis
- Hydrogen Storage and Materials
- Catalytic Processes in Materials Science
- Chemical Reactions and Isotopes
- Machine Learning in Materials Science
- Luminescence and Fluorescent Materials
- Biopolymer Synthesis and Applications
- Ion channel regulation and function
- Photosynthetic Processes and Mechanisms
- Enhanced Oil Recovery Techniques
Lawrence Berkeley National Laboratory
2015-2025
University of California, Berkeley
2016-2025
University of California System
2018-2021
Materials Research Group (United States)
2020
University of Nottingham
2020
Sandia National Laboratories California
2020
Berkeley College
2015-2019
Kavli Energy NanoScience Institute
2013-2017
Vietnam National University Ho Chi Minh City
2015-2016
King Fahd University of Petroleum and Minerals
2015-2016
Crystalline metal-organic frameworks (MOFs) are formed by reticular synthesis, which creates strong bonds between inorganic and organic units. Careful selection of MOF constituents can yield crystals ultrahigh porosity high thermal chemical stability. These characteristics allow the interior MOFs to be chemically altered for use in gas separation, storage, catalysis, among other applications. The precision commonly exercised their modification ability expand metrics without changing...
A high-throughput protocol was developed for the synthesis of zeolitic imidazolate frameworks (ZIFs). Twenty-five different ZIF crystals were synthesized from only 9600 microreactions either zinc(II)/cobalt(II) and imidazolate/imidazolate-type linkers. All structures have tetrahedral frameworks: 10 which two links (heterolinks), 16 are previously unobserved compositions structures, 5 topologies as yet in zeolites. Members a selection these ZIFs (termed ZIF-68, ZIF-69, ZIF-70) high thermal...
Crystalline solids with extended non-interpenetrating three-dimensional crystal structures were synthesized that support well-defined pores internal diameters of up to 48 angstroms. The Zn4O(CO2)6 unit was joined either one or two kinds organic link, 4,4',4''-[benzene-1,3,5-triyl-tris(ethyne-2,1-diyl)]tribenzoate (BTE), 4,4',44''-[benzene-1,3,5-triyl-tris(benzene-4,1-diyl)]tribenzoate (BBC), 4,4',44''-benzene-1,3,5-triyl-tribenzoate (BTB)/2,6-naphthalenedicarboxylate (NDC), and...
Water adsorption in porous materials is important for many applications such as dehumidification, thermal batteries, and delivery of drinking water remote areas. In this study, we have identified three criteria achieving high performing adsorption. These deal with condensation pressure the pores, uptake capacity, recyclability stability material. search an excellently material, studied compared properties 23 materials, 20 which are metal–organic frameworks (MOFs). Among MOFs 10 zirconium(IV)...
Dihydrogen, methane, and carbon dioxide isotherm measurements were performed at 1-85 bar 77-298 K on the evacuated forms of seven porous covalent organic frameworks (COFs). The uptake behavior capacity COFs is best described by classifying them into three groups based their structural dimensions corresponding pore sizes. Group 1 consists 2D structures with 1D small pores (9 A for each COF-1 COF-6), group 2 includes large (27, 16, 32 COF-5, COF-8, COF-10, respectively), 3 comprised 3D...
We report a strategy to expand the pore aperture of metal-organic frameworks (MOFs) into previously unattained size regime (>32 angstroms). Specifically, systematic expansion well-known MOF structure, MOF-74, from its original link one phenylene ring (I) two, three, four, five, six, seven, nine, and eleven (II XI, respectively), afforded an isoreticular series MOF-74 structures (termed IRMOF-74-I XI) with apertures ranging 14 98 angstroms. All members this have noninterpenetrating exhibit...
We show that metal-organic frameworks (MOFs) can incorporate a large number of different functionalities on linking groups in way mixes the linker, rather than forming separate domains. made complex MOFs from 1,4-benzenedicarboxylate (denoted by "A" this work) and its derivatives -NH2, -Br, -(Cl)2, -NO2, -(CH3)2, -C4H4, -(OC3H5)2, -(OC7H7)2 "B" to "I," respectively) synthesize 18 multivariate (MTV) MOF-5 type structures contain up eight distinct one phase. The backbone (zinc oxide phenylene...
A new crystalline porous three-dimensional covalent organic framework, termed COF-300, has been synthesized and structurally characterized. Tetrahedral tetra-(4-anilyl)-methane linear terephthaldehyde building blocks were condensed to form imine linkages in a material whose X-ray crystal structure shows five independent diamond frameworks. Despite the interpenetration, pores of 7.2 diameter. Thus, COF-300 thermal stability up 490 degrees C permanent porosity with surface area 1360 m(2) g(-1).
Atmospheric water is a resource equivalent to ~10% of all fresh in lakes on Earth. However, an efficient process for capturing and delivering from air, especially at low humidity levels (down 20%), has not been developed. We report the design demonstration device based porous metal-organic framework {MOF-801, [Zr6O4(OH)4(fumarate)6]} that captures atmosphere ambient conditions by using low-grade heat natural sunlight flux less than 1 sun (1 kilowatt per square meter). This capable harvesting...
Five new crystalline zeolitic imidazolate frameworks (ZIFs), ZIF-78 to -82, were prepared from zinc(II) nitrate and mixtures of 2-nitroimidazole five different functionalized imidazoles found have the GME topology. These structures, along with three previously reported ZIFs, constitute a series highly porous materials Brunauer-Emmet-Teller surface areas ranging 620 1730 m(2)/g. The pore diameters apertures vary incrementally 7.1 15.9 A 3.8 13.1 A, respectively, functionalities decorating...
Selective capture of CO(2), which is essential for natural gas purification and CO(2) sequestration, has been reported in zeolites, porous membranes, amine solutions. However, all such systems require substantial energy input release captured leading to low efficiency high cost. A new class materials named metal-organic frameworks (MOFs) also demonstrated take up voluminous amounts CO(2). these studies have largely limited equilibrium uptake measurements, are a poor predictor separation...
Condensation of 2,5-diethoxyterephthalohydrazide with 1,3,5-triformylbenzene or 1,3,5-tris(4-formylphenyl)benzene yields two new covalent organic frameworks, COF-42 and COF-43, in which the building units are linked through hydrazone bonds to form extended two-dimensional porous frameworks. Both materials highly crystalline, display excellent chemical thermal stability, permanently porous. These COFs expand scope possibilities for this emerging class materials.
We report the H2 uptake properties of six covalent organic frameworks (COFs) from first-principles-based grand canonical Monte-Carlo simulations. The predicted adsorption isotherm is in excellent agreement with only available experimental result (3.3 vs 3.4 wt % at 50 bar and 77 K for COF-5), also reported here, validating predictions. predict that COF-105 COF-108 lead to a reversible excess 10.0 K, making them best known storage materials molecular hydrogen K. total 18.9 COF-102 shows...
Three new metal–organic frameworks [MOF-525, Zr6O4(OH)4(TCPP-H2)3; MOF-535, Zr6O4(OH)4(XF)3; MOF-545, Zr6O8(H2O)8(TCPP-H2)2, where porphyrin H4-TCPP-H2 = (C48H24O8N4) and cruciform H4-XF (C42O8H22)] based on two topologies, ftw csq, have been synthesized structurally characterized. MOF-525 -535 are composed of Zr6O4(OH)4 cuboctahedral units linked by either (MOF-525) or (MOF-535). Another zirconium-containing unit, Zr6O8(H2O)8, is to give the MOF-545 structure. The structure was obtained...
ADVERTISEMENT RETURN TO ISSUECommunicationNEXTNew Porous Crystals of Extended Metal-CatecholatesMohamad Hmadeh†‡, Zheng Lu†‡, Liu§, Felipe Gándara†‡, Hiroyasu Furukawa†‡, Shun Wan†‡, Veronica Augustyn⊥, Rui Chang⊥, Lei Liao‡, Fei Zhou⊥, Emilie Perre⊥, Vidvuds Ozolins⊥, Kazu Suenaga§, Xiangfeng Duan‡, Bruce Dunn⊥, Yasuaki Yamamto∥, Osamu Terasaki#□, and Omar M. Yaghi*†‡#View Author Information† ‡ †Center for Reticular Chemistry, Center Global Mentoring, ‡Department Chemistry Biochemistry,...
Two types (imine and boronate) of covalent organic frameworks (COFs) having a porphyrin unit have been synthesized. The two highly crystalline COFs (COF-366 COF-66) display excellent chemical thermal stability are permanently porous. Two-dimensional extended layered structures the demonstrate very high charge carrier mobility values (8.1 cm2 V−1 s−1).
Three new crystalline microporous and mesoporous 2D covalent organic frameworks termed COF-6, -8, -10 from boronic acid building blocks 2,3,6,7,10,11-hexahydroxytriphenylene have been synthesized structurally characterized. These materials constructed of C2O2B rings form eclipsed layered structures with pore sizes ranging 6.4 to 34.1 Å are found high thermal stability, low density, porosity as indicated by the surface areas 980, 1400, 2080 m2 g-1 for -10, respectively. The control size...
A new crystalline zeolitic imidazolate framework, ZIF-90, was prepared from zinc(II) nitrate and imidazolate-2-carboxyaldehyde (ICA) found to have the sodalite-type topology. Its 3D porous framework has an aperture of 3.5 Å a pore size 11.2 Å. The pores are decorated by aldehyde functionality ICA which allowed its transformation alcohol reduction with NaBH4 conversion imine reaction ethanolamine give ZIF-91 ZIF-92, respectively. N2 adsorption isotherm ZIF-90 shows highly material calculated...
Let them eat MOFs: Take a spoonful of sugar (γ-cyclodextrin to be precise), pinch salt (most alkali metal salts will suffice), and swig alcohol (Everclear fits the bill), you have robust, renewable, nanoporous (Langmuir surface area 1320 m2 g−1) metal–organic framework for breakfast (CD-MOF-1; see picture, C gray, O red, K purple; yellow sphere: pore). Detailed facts importance specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or...
Hydrogen isotherms for MOF-177, Zn4O(1,3,5-benzenetribenzoate)2, crystals were independently measured by volumetric and gravimetric methods at 77 K to confirm its hydrogen uptake capacity establish the importance of calibrating gas adsorption instrumentation prior evaluating H2 storage capacities. Reproducibility experiments is important because non-systematic errors in measurements can easily occur leading erroneous reports The surface excess weight percentage MOF-177 samples 7.5 wt% 70...
Reaction of AlCl3·6H2O with 2,2′-bipyridine-5,5′-dicarboxylic acid (H2bpydc) affords Al(OH)(bpydc) (1, MOF-253), the first metal−organic framework open 2,2′-bipyridine (bpy) coordination sites. The material displays a BET surface area 2160 m2/g and readily complexes metals to afford, for example, 1·xPdCl2 (x = 0.08, 0.83) 1·0.97Cu(BF4)2. EXAFS spectroscopy performed on 1·0.83PdCl2 reveals expected square planar geometry, matching structure model complex (bpy)PdCl2. Significantly, selectivity...