A5022312011- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Spectroscopy and Quantum Chemical Studies
- Membrane Separation and Gas Transport
- Carbon Dioxide Capture Technologies
- Advanced Chemical Physics Studies
- Crystallography and molecular interactions
- Quantum, superfluid, helium dynamics
- Inorganic Fluorides and Related Compounds
- Machine Learning in Materials Science
- Spectroscopy and Laser Applications
- X-ray Diffraction in Crystallography
- Molecular spectroscopy and chirality
- Magnetism in coordination complexes
- Catalytic Processes in Materials Science
- Advanced NMR Techniques and Applications
- Photochemistry and Electron Transfer Studies
- Methane Hydrates and Related Phenomena
- Zeolite Catalysis and Synthesis
- Crystallization and Solubility Studies
- Thermodynamic properties of mixtures
- CO2 Reduction Techniques and Catalysts
- Carbon dioxide utilization in catalysis
- Radioactive element chemistry and processing
- Hydrogen Storage and Materials
North Carolina State University
2021-2025
University of South Florida
2015-2024
University of Tampa
2013-2021
Fowler Kennedy Sport Medicine Clinic
2017
Xavier University of Louisiana
2010
National Energy Technology Laboratory
2010
University of Pittsburgh
2010
Duquesne University
1996-2000
Princeton University
1993
Boston University
1988-1992
Selecting for ethylene Purification of from other gases produced during its synthesis, such as acetylene, ethane, and carbon dioxide, is an energy-intensive process. Chen et al. use a mixture microporous metal-organic framework physisorbents that are selective one these four gases. A series sorbents in packed-bed geometry pure enough making polymers. Science , this issue p. 241
Highly selective separation and/or purification of acetylene from various gas mixtures is a relevant and difficult challenge that currently requires costly energy-intensive chemisorption processes. Two ultramicroporous metal-organic framework physisorbents, NKMOF-1-M (M=Cu or Ni), offer high hydrolytic stability benchmark selectivity towards versus several gases at ambient temperature. The performance attributed to their exceptional binding affinity as revealed by modelling experimental...
In this work, we demonstrate for the first time introduction of π-complexation into a porous aromatic framework (PAF), affording significant increase in ethylene uptake capacity, as illustrated context Ag(I) ion functionalized PAF-1, PAF-1-SO3Ag. IAST calculations using single-component-isotherm data and an equimolar ethylene/ethane ratio at 296 K reveal that PAF-1-SO3Ag shows exceptionally high adsorption selectivity (Sads: 27 to 125), far surpassing benchmark zeolite any other MOF reported...
Abstract A majority of metal–organic frameworks (MOFs) fail to preserve their physical and chemical properties after exposure acidic, neutral, or alkaline aqueous solutions, therefore limiting practical applications in many areas. The strategy demonstrated herein is the design synthesis an organic ligand that behaves as a buffer drastically boost stability porous MOF (JUC‐1000), which maintains its structural integrity at low high pH values. local environment resulting from weak acid–base...
Abstract Porous materials capable of selectively capturing CO 2 from flue‐gases or natural gas are interest in terms rising atmospheric levels and methane purification. Size‐exclusive sieving over CH 4 N has rarely been achieved. Herein we show that a crystal engineering approach to tuning pore‐size coordination network, [Cu(quinoline‐5‐carboxyate) ] n ( Qc‐5‐Cu ) ena+bles ultra‐high selectivity for (S CN ≈40 000) CM ≈3300). Qc‐5‐Cu‐sql‐β , narrow pore polymorph the square lattice sql...
The removal of carbon dioxide (CO2) from acetylene (C2H2) is a critical industrial process for manufacturing high-purity C2H2. However, it remains challenging to address the tradeoff between adsorption capacity and selectivity, on account their similar physical properties molecular sizes. To overcome this difficulty, here we report novel strategy involving regulation hydrogen-bonding nanotrap pore surface promote separation C2H2/CO2 mixtures in three isostructural metal-organic frameworks...
We report MPM-1-TIFSIX, a molecular porous material (MPM) based upon the neutral metal complex [Cu2(adenine)4(TiF6)2], that self-assembles through hydrogen-bonding network. This MPM is amenable to room-temperature synthesis and activation. Gas adsorption measurements ideal adsorbed solution theory selectivity predictions at 298 K revealed enhanced CO2 separation performance relative previously known variant as well highest uptake isosteric heat of yet reported for an MPM. MPM-1-TIFSIX...
Abstract As a major greenhouse gas, methane, which is directly vented from the coal‐mine to atmosphere, has not yet drawn sufficient attention. To address this problem, we report methane nano‐trap that features oppositely adjacent open metal sites and dense alkyl groups in metal–organic framework (MOF). The MOF‐based exhibits record‐high uptake CH 4 /N 2 selectivity at 298 K 1 bar. molecules trapped within MOF were crystalographically identified by single‐crystal X‐ray diffraction...
Abstract Porous materials with open metal sites have been investigated to separate various gas mixtures. However, show the limitation in separation of some challenging mixtures, such as C 2 H /CO . Herein, we propose a new type ultra‐strong nano‐trap based on multiple binding interactions efficiently capture molecules and mixture. The acetylene shows benchmark Q st 79.1 kJ mol −1 for , record high pure uptake 2.54 mmol g at 1×10 −2 bar, highest selectivity (53.6), making it material...
Herein, we report that a new flexible coordination network, NiL2 (L=4-(4-pyridyl)-biphenyl-4-carboxylic acid), with diamondoid topology switches between non-porous (closed) and several porous (open) phases at specific CO2 CH4 pressures. These are manifested by multi-step low-pressure isotherms for or single-step high-pressure isotherm . The potential methane working capacity of approaches compressed natural gas but much lower guest-induced phase transitions were studied single-crystal XRD,...
The first sorbent with high CO 2 selectivity and poor water affinity addresses need for trace remediation in confined spaces.
Physical adsorption of gas molecules in microporous materials is an exothermic process, with desorption entropy driving a decrease uptake temperature. Enhanced sorption increasing temperature rare porous and indicative sorbate initiated structural change. Here, C2H6, C3H6, C3H8 flexible metal–organic framework (MOF) {Cu(FPBDC)]·DMF}n (NKU-FlexMOF-1) (H2FPBDC = 5-(5-fluoropyridin-3-yl)-1,3-benzenedicarboxylic acid) that increases rising over practically useful pressure range reported along...
Abstract Flexible metal–organic materials that exhibit stimulus-responsive switching between closed (non-porous) and open (porous) structures induced by gas molecules are of potential utility in storage separation. Such behaviour is currently limited to a few dozen physisorbents typically switch through breathing mechanism requiring structural contortions. Here we show clathrate coordination network undergoes gas-induced multiple non-porous phases transient porosity, which involves the...
Separating ethane (C
Monte Carlo simulations were performed modeling hydrogen sorption in a recently synthesized metal-organic framework material (MOF) that exhibits large molecular uptake capacity. The MOF is remarkable because at 78 K and 1.0 atm it sorbs density near of liquid (at 20 atm) when considering H2 the pores. Unlike most other MOFs have been investigated for storage, has highly ionic many relatively small channels. demonstrate both these physical characteristics lead to strong interactions...
The introduction of the combination open metal site (OMS) and π-complexation into MOF has led to very high ethylene-ethane adsorption selectivity at 318 K, as illustrated in context MIL-101-Cr-SO3Ag. interactions with ethylene from both OMS MIL-101-Cr-SO3Ag have been investigated by situ IR spectroscopic studies computational calculations, which suggest that contributes dominantly selectivity.
Abstract The demand for Xe/Kr separation continues to grow due the industrial significance of high‐purity Xe gas. Current processes rely on energy intensive cryogenic distillation. Therefore, less alternatives, such as physisorptive separation, using porous materials, are required. Herein we show that an underexplored class materials called hybrid ultra‐microporous (HUMs) affords new benchmark selectivity from mixtures. isostructural CROFOUR‐1‐Ni and CROFOUR‐2‐Ni, coordination networks have...
Dynamic and flexible metal–organic frameworks (MOFs) that respond to external stimuli, such as stress, light, heat, the presence of guest molecules, hold promise for applications in chemical sensing, drug delivery, gas separations, catalysis.
Abstract We present a crystal engineering strategy to fine tune the pore chemistry and CH 4 ‐storage performance of family isomorphic MOFs based upon PCN‐14. These exhibit similar size, surface, surface area (around 3000 m 2 g −1 ) were prepared with goal enhance working capacity. [Cu (L2)(H O) ] n (NJU‐Bai 41: NJU‐Bai for Nanjing University Bai's group), (L3)(H 42), (L4)(DMF) 43) we observed that volumetric capacity uptake values are influenced by subtle changes in structure chemistry. In...
A new hybrid ultramicroporous material, [Ni(1,4-di(pyridine-2-yl)benzene)2(Cr2O7)]n (DICRO-4-Ni-i), has been prepared and structurally characterized. Pure gas sorption isotherms molecular modeling of sorbate-sorbent interactions imply strong selectivity for C2H2 over CO2 (SAC). Dynamic breakthrough coupled with temperature-programmed desorption experiments were conducted on DICRO-4-Ni-i two other porous materials reported to exhibit high SAC, TIFSIX-2-Cu-i MIL-100(Fe), using a C2H2/CO2/He...
Capture of CO<sub>2</sub> from flue gas is considered to be a feasible approach mitigate the effects anthropogenic emission CO<sub>2</sub>.
A novel 4(8).6(7) topology metal-organic material (MOM) platform of formula [M(bpe)(2)(M'O(4))] (M = Co or Ni; bpe 1,2-bis(4-pyridyl)ethene; M' Mo Cr) has been synthesized and evaluated in the context gas sorption. These MOMs have assigned RCSR code mmo are uninodal 6-connected nets. [Ni(bpe)(2)(MoO(4))], MOOFOUR-1-Ni, its chromate analogue, CROFOUR-1-Ni, exhibit high CO(2) affinity selectivity, especially at low loading. This behavior can be attributed to exceptionally isosteric heats...