The metal–organic frameworks M2(dhtp)(H2O)2·8H2O (CPO-27-M, M = Ni, Mg) can be activated to give the empty framework compounds M2(dhtp) with a honeycomb analogous structure containing large micropores of 11–12 Å diameter and high concentration open metal sites. These sites play major role in adsorption methane carbon dioxide, which was studied at pressures up 100 bar 50 bar, respectively, various temperatures range 179 473 K. Both gases are taken by material significant amounts. maximum...

The solvent contained within the cylindrical one-dimensional pores of novel three-dimensional metal organic framework Ni2(dhtp)(H2O)2.8H2O can be removed without decomposition network, allowing gas storage cavities.

The arrangement of the spins adjacent helical cobalt–oxygen chains that form backbone framework (see figure) a microporous coordination polymer lead to metamagnetic behavior. When is heated, metal center loses coordinated water molecule and alters its geometry from octahedral square-pyramidal, although remains stable. Supporting information for this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2005/z501508_s.pdf or author. Please note: publisher not responsible...

The microporous metal-organic framework Ni(2)(dhtp) (H(4)dhtp=2,5-dihydroxyterephthalic acid) shows distinct end-on CO(2) coordination to coordinatively unsaturated nickel sites giving rise high adsorption capacity at sub-atmospheric pressures and ambient temperatures.

Abstract Two coordination polymers constructed from magnesium and the tetratopic organic linker 2,5‐dihydroxyterephthalic acid are reported, denominated CPO‐26‐Mg CPO‐27‐Mg. The component carries two different types of protic functional groups. degree deprotonation can be regulated by amount sodium hydroxide employed in synthesis, thus determining which compounds forms. In CPO‐26‐Mg, only carboxylic groups deprotonated take part construction three‐dimensional framework. structure is...

Porous metal-organic framework compounds with coordinatively unsaturated metal sites on the inner surface of pores promise to be valuable adsorbents and catalyst systems, either in industrial applications or as model systems study interactions guest molecules. The dehydration process two isostructural microporous coordination polymers, [M2(dhtp)(H2O)2].8 H2O, termed CPO-27-M (M=Co, Zn; H(4)dhtp=2,5-dihydroxyterephthalic acid) was investigated by situ variable temperature X-ray diffraction....

Hydrogen molecules adsorbed in the nickel, cobalt, and magnesium analogs of CPO-27 metal–organic framework at low loadings interact significantly more strongly than those successively as a consequence strong interaction hydrogen with coordinatively unsaturated metal cations framework.

DFT and high-level ab initio calculations (among them B3LYP G3MP2B3) have been used to describe molecular reactions relevant for CO2 absorption in aqueous (alkanol)amine solutions. Reaction mechanisms various of with ammonia, monoethanolamine (MEA), diethanolamine (DEA) carbamic acid ion pair products investigated interpreted light experimental observations. Additional water, MEA, DEA molecules also added the complexes simulate microsolvation effects. These extra may act as catalysts desired...

The structure and properties of two new UiO-67-type metal–organic frameworks, along with their linker synthesis powder single crystal synthesis, are presented. MOFs, UiO-67-Me UiO-67-BN, based on 3,3′-dimethylbiphenyl 1,1′-binaphthyl scaffolds, show a much higher stability to water than the thoroughly investigated UiO-67, which is biphenyl scaffold. On basis models obtained from X-ray diffraction, it seen that these linkers partly shielding Zr cluster. materials have density but volumetric...

Abstract Reaction of dichlorobis(pentamethylcyclopentadienyl)silane with naphthalene‐lithium, ‐sodium, or ‐potassium leads to elemental silicon and decamethylsilicocene, (Me 5 C ) 2 Si ( 4 ). Compound is formed as the only product in reduction dibromobis(pentamethylcyclopentadineyl)silane anthracene‐potassium. a thermally stable, colorless, air‐sensitive π‐complex. Its NMR spectra are typical for group 14 metallocene; 29 Si‐NMR signal appears at very high field strength (δ = −398 ppm). CV MS...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultiple bonds between main-group elements and transition metals. 86. Methyltrioxorhenium(VII) trioxo(.eta.5-pentamethylcyclopentadienyl)rhenium(VII): structures, spectroscopy electrochemistryWolfgang A. Herrmann, Paul Kiprof, Kristin Rypdal, Janos Tremmel, Richard Blom, Roger Alberto, Joachim Behm, Rolf W. Albach, Hans Bock, Cite this: J. Am. Chem. Soc. 1991, 113, 17, 6527–6537Publication Date (Print):August 1, 1991Publication History Published...

Die Spinanordnung benachbarter helicaler Cobalt-Sauerstoff-Ketten, die das Rückgrat des Netzwerks (siehe Bild) eines mikroporösen Koordinationspolymers bilden, führt zu Metamagnet-Verhalten. Beim Erhitzen Polymers verlieren Metallzentren koordinierte Wassermoleküle und wechseln von oktaedrischer quadratisch-pyramidaler Koordination, wobei Netzwerk stabil bleibt. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2001/2005/z501508_s.pdf...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT(Pentamethylcyclopentadienyl)indium(I) and -indium(III) compounds. Syntheses, reactivities, x-ray diffraction electron studies of In(C5Me5)O. T. Beachley, Richard. Blom, Melvyn Rowen. Churchill, Knut. Faegri, James C. Fettinger, J. Pazik, L. VictorianoCite this: Organometallics 1989, 8, 2, 346–356Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Published inissue 1 February...

Water is the strongest competitor to CO2 in adsorption on microporous materials, affecting their performances as scrubbers processes such postcombustion carbon capture. The metal–organic framework (MOF) UTSA-16 considered a promising material for its capacity efficiently capture large quantities, thanks presence of open metal sites (OMSs). It here shown that also able desorb fully water already at room temperature. This property unique from all other materials with OMSs reported so far....

Adsorption equilibrium of CO2 and CH4 at three different temperatures was measured on isoreticular Zr-MOFs: Zr(1,4-BDC) (UiO-66), Zr(4,4′-BPDC) UiO-67, Zr(2,6-NDC) (DUT-52). data 298, 313, 343 K up to 30 bar for 80 CH4. The adsorbents have increasing surface areas, pore volumes, sizes in the order UiO-66 < DUT-52 UiO-67. maximum loading selectivity follow same trend. relatively low isosteric heats adsorption indicate potential application high partial pressures so-called precombustion...

Structuring MOF materials is a fundamental step towards their commercialization. Herein we report intensive characterization of 3D-printed UTSA-16 monoliths, facilitated by the development new non-aqueous ink formulation, employing hydroxypropyl cellulose and boehmite to adjust rheology ink. What makes this formulation printing process different from printed adsorbents catalysts published previously, that resulting structures in work were not sintered. The presence binder matrix only...

Metal-organic framework (MOF) materials are porous with high surface area that offer enormous flexibility of design and tailoring its properties to be used in diverse chemical processes. Most the reported MOF were evaluated powder produced small scale where synthesis has been optimized obtain crystalline powders. Ideally, industrialization these will also associated efficient scalable protocols. Moreover, for as environmental-benign materials, their sustainable. We present a cradle-to-gate...

Adsorption-based post-combustion CO2 capture is enjoying significant research attention due to its potential for reductions in energy penalty, cost and environmental impact. Recent sorbent development work has focussed on polyethyleneimine (PEI) dry sorbents that exhibit attractively low regeneration requirements. The main objective of this study identify best suitable the recently published swing adsorption reactor cluster (SARC) concept. screening results four indicated two PEI be good...

The present work considers the utilization of a moving bed temperature swing adsorption (MBTSA) process for CO2 capture as alternative to commercial absorption-based technologies, in context natural gas combined cycle (NGCC) power plants. A detailed mathematical model consisting energy, mass and momentum balances was implemented gPROMS software, order investigate system behavior under different operating conditions design parameters. Results show that simulated conditions, is suitable...

A 3D-printed sorbent containing polyethylene-imine and multi-walled carbon nanotubes (PEI-MWCNT) was studied for post-combustion capture. In this work, the adsorbent printed on a kg scale characterized CO2 adsorption through lab experiments. 6-step VSA process simulated using data to capture from representative 800 MW power plant. The captured >70 % of 95 purity achieved. levelized cost electricity (LCOE) 130.2 $/MWh costs avoided were 80 100.12 $/tonne. However, zeolite 13X-activated...