A5084315860- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Membrane Separation and Gas Transport
- Carbon Dioxide Capture Technologies
- Adsorption and biosorption for pollutant removal
- Chemical Synthesis and Characterization
- Conducting polymers and applications
- Phosphorus and nutrient management
- Fluoride Effects and Removal
- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Hydrogen Storage and Materials
- Pickering emulsions and particle stabilization
- Oxidative Organic Chemistry Reactions
- 2D Materials and Applications
- Luminescence and Fluorescent Materials
- Radioactive element chemistry and processing
- Advanced Polymer Synthesis and Characterization
- Chemistry and Chemical Engineering
- Advanced Photocatalysis Techniques
- Boron and Carbon Nanomaterials Research
- Image and Object Detection Techniques
- Cognitive Abilities and Testing
- Metal Extraction and Bioleaching
- Chemical Thermodynamics and Molecular Structure
University of Sheffield
2016-2024
Saint Mary's University
2019-2021
University of Bath
2016
University of Liverpool
2008-2014
Technische Universität Berlin
2013-2014
Advanced Micro Devices (United States)
1996
Indiana University
1993
Dalhousie University
1984
University of Vienna
1968-1969
Oak Ridge National Laboratory
1968
Porous, fluorescent, covalent triazine-based frameworks (CTFs) are obtained in an unprecedentedly mild reaction, opening up a scalable pathway for molecular building blocks previously thought incompatible with this chemistry. Choice of monomers and synthetic conditions determines the optical properties nano-scale ordering these highly microporous materials BET surface areas exceeding 1100 m2 g−1 exceptional CO2 capacities (up to 4.17 mmol g−1). Detailed facts importance specialist readers...
Anthropogenic carbon dioxide emissions are thought to be one cause of global warming. Current methods for CO2 capture result in large energy penalties. Solid adsorbents a potential method CO2, but the sorbent-sorbate affinity is critical determining energetic viability such processes. In this study, adsorption range microporous organic polymers was tested. These materials adsorb up 2.20 mmol/g at 298 K and 1 bar, thus performance compared with related porous solids literature. The...
We report here the carbon dioxide sorption properties for a series of conjugated microporous polymer (CMP) networks. These CMP materials incorporate range chemical functionalities including carboxylic acids, amines, hydroxyl groups, and methyl groups. The acid functionalised network, rather than its amine analogue, shows highest isosteric heat CO2. This supports recent computational predictions metal–organic frameworks suggests that acid-functionalised could outperform more widely studied...
A range of conjugated microporous polymer networks has been prepared using Sonogashira−Hagihara cross-coupling 1,3,5-triethynylbenzene with a number functionalized dibromobenzenes. Porous poly(arylene ethynylene) surface areas up to 900 m2/g were produced. The chemistry the was varied by monomer selection, thus allowing control over physical properties such as hydrophobicity. Additionally, it shown that dye sorption behavior can be controlled varying This expands significantly on utility...
Abstract We review the design and use of microporous polymers for pre‐ post‐combustion capture CO 2 . Microporous organic are promising candidates materials. They have good physicochemical stabilities high surface areas. Ultrahigh‐surface‐area could find in pre‐combustion capture, while networks with lower areas but higher heats sorption might be more relevant pressure, capture. discuss strategies enhancing uptakes including increasing area, chemical functionalization to provide...
In an effort to reduce the energy penalty and cost associated with state-of-the-art carbon capture technologies, a range of 2nd 3rd generation CO2 technologies are being developed. One these based on solid sorbents for gas separation in capture, has potential significantly avoid some problems current technologies. However realise this potential, two main developments required: new porous materials plant integration processes. This application note describes performance requirements...
Alcohol-containing polymer networks synthesized by Friedel–Crafts alkylation have surface areas of up to 1015 m2/g. Both racemic and chiral microporous binaphthol (BINOL) can be produced a simple, one-step route. The BINOL show higher CO2 capture capacities than their naphthol counterparts under idealized, dry conditions. In the presence water vapor, however, these adsorb less more hydrophobic analogues, suggesting that idealized measurements may give poor indication performance realistic carbon
To impact carbon emissions, new materials for capture must be inexpensive, robust, and able to adsorb CO2 specifically from a mixture of other gases. In particular, tolerant the water vapor acidic impurities that are present in gas streams produced by using fossil fuels generate electricity. We show porous organic polymer has excellent capacity high selectivity under conditions relevant precombustion capture. Unlike polar adsorbents, such as zeolite 13x metal-organic framework, HKUST-1,...
The choice of reaction solvent has a major influence on the surface area and pore volume in conjugated microporous polymer (CMP) networks synthesized by Sonogashira−Hagihara palladium-catalyzed cross-coupling chemistry aromatic dibromo monomers with 1,3,5-triethynylbenzene. Four solvents were evaluated for these reactions: N,N-dimethylformamide (DMF), 1,4-dioxane, tetrahydrofuran (THF), toluene. Networks DMF tend to exhibit highest areas (up 1260 m2/g), whereas those toluene have average...
Conjugated microporous polymers (CMPs) based on the electron-withdrawing 1,3,5-triazine node (TCMPs) were synthesized by palladium-catalyzed Sonogashira-Hagihara cross-coupling. The porosity in these was found to be comparable analogous 1,3,5-connected benzene CMP systems that we reported previously, demonstrating nodes can substituted amorphous materials a rational manner, much as for certain crystalline porous metal–organic frameworks. CO2 adsorption properties of TCMPs measured and...
Microporous organic polymers have been synthesised from aniline using Friedel–Crafts alkylation. Networks solely were non-porous to nitrogen. However, co-polymerisation with benzene resulted in networks apparent Brunauaer-Emmett-Teller (BET) surface areas up 1100 m2 g−1. Increased content the hyper-crosslinked led improved CO2/N2 selectivity, suggesting a strategy for design of materials post-combustion carbon capture.
Conjugated microporous polymeric networks possessing thioxanthone groups were reported to initiate free radical and cationic polymerizations of vinyl monomers cyclic ethers, respectively, under visible light irradiation. These new classes Type II macrophotoinitiators with high porosity having large BET surface area 500–750 m2 g–1 prepared through different cross-coupling processes. Polymerizations are successfully achieved in conjugation several co-initiators benefiting from hydrogen...
Control over the surface functionality and microporosity in conjugated microporous polymers (CMPs) has been achieved by post-synthetic modification of amines into amides with different alkyl chains, one which was chiral. The areas, pore volumes, carbon dioxide uptakes isosteric heat adsorption for can be rationally tuned.
Sulfonated hyper-cross-linked polymers based on 4,4'-bis(chloromethyl)-1,1'-biphenyl (BCMBP) were synthesized via metal-free (SHCP-1) and conventional Lewis acid-catalyzed (SHCP-2) Friedel-Crafts alkylation routes. The sulfonated possessed BET surface areas in excess of 500 m2·g-1. SHCP-1 was investigated for its ability to extract Sr Cs ions from aqueous solutions the ion-exchange reaction sulfonic acid moiety. Equilibrium uptake data could be accurately modeled by Dubinin-Radushkevich...
Microporous organic polymer networks with weakly coordinating cations in their backbone have been synthesised by metal catalysed C–C bond forming reactions.
Microporous organic polymers (MOPs) have been prepared via one-pot polycondensation reactions between aldehydes and amines. Primary amines were reacted with imines to produce porous from A2 + B2 monomer combinations. The resulting networks exhibit BET surface areas in the range 500–600 m2 g−1. This approach opens up possibility of synthesising MOPs using readily-available inexpensive precursors.
The mechanism of network formation for a conjugated microporous polymer (CMP-1) has been investigated in detail.
Low band-gap conjugated microporous polymers (CMPs) based on benzothiadiazole (BTZ) and thiophene-benzothiadiazole-thiophene (TBT) functional groups are prepared. The show moderate surface areas broad light absorption covering the whole visible region. Fluorescence of one can be readily quenched by in situ blending fullerene.
A [2+3] organic cage compound based on the condensation reaction of 1,3,5-tri(4-formylphenyl)benzene with 1,5-pentanediamine was synthesized. The resulting porous molecular crystal demonstrates selective adsorption hydrogen and carbon dioxide over nitrogen. As for polymer membranes, a trade-off between sorption capacity selectivity is observed materials in this class.
Polymers of intrinsic microporosity (PIMs) are currently attracting interest due to their unusual combination high surface areas and capability be processed into free-standing films. However, there has been little published work with regards physical mechanical properties. In this paper, detailed characterisation PIM-1 was performed by considering its chemical, gas adsorption The polymer cast films, characterised in terms hydrogen at -196 °C up much higher pressures (17 MPa) than previously...
MXenes are a recently discovered class of two-dimensional materials that have shown great potential as electrodes in electrochemical energy storage devices. Despite their promise this area, can still suffer limitations the form restricted ion accessibility between closely spaced multistacked MXene layers causing low capacities and poor cycle life. Pillaring, where secondary species is inserted layers, has been used to increase interlayer spacings clays with success but had limited...