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Tianyu Liu obtained his Ph. He is passionate about scientific communication to introduce cutting-edge research to both the general public and scientists with diverse research expertise.
He is a blog writer for Chem. More information about him can be found at http: The researchers classified this material as a zeolite-like MOF ZMOF due to its topological resemblance to the naturally occurring zeolite mineral analcime.
Linear and mono-branched pentanes and butanes were adsorbed by the material for different lengths of time linear isomers were retained longer than their branched counterparts allowing kinetic separation, while the di-branched alkane 2,2,4-trimethylpentane was excluded entirely.
The authors anticipate that this material could have practical applications in crude oil refining, to upgrade petroleum into more energy-efficient fuels with reduced emissions. ZMOF crystal structure with analcime ana topology showing channels and pore aperture. The petroleum used to power internal combustion Semiconducting mofs consists of a mixture of low molecular weight, linear and branched alkanes.
The research octane number RON is a standard measure of petroleum performance, and indicates how much pressure a fuel can withstand before self-igniting knocking in the engine.
High compression engines, which are more energy efficient Semiconducting mofs release less emissions than regular engines, require high RON fuels. The RON increases with the proportion of branched alkanes, so can be improved by supplementing fuels with branched isomers obtained by catalytic isomerisation.
This process generates a mixture of linear and branched alkanes, so the desired products must be isolated via fractional distillation, which is energy intensive. This creates a dilemma: The authors envisaged an energy-efficient strategy for increasing the RON of petroleum fuels: The membrane excludes and redirects di-branched alkanes, which have a very high RON, to the internal combustion engine.
The low RON fraction, consisting of mono-branched and linear alkanes, passes through the ZMOF pores to undergo further reforming processes downstream.
Scheme showing the RON of common small-chain alkanes and the use of ZMOF membranes in upgrading gasoline by separating alkanes based on their level of branching In this work the authors show the potential of ZMOFs to maximise the energetic potential and reduce emissions of petroleum based fuels, while also offering a glimpse of the more general strategy of energy-efficient separations of chemically-similar molecules using tailored materials.
To find out more please read: Mohideen, Youssef Belmabkhout, Prashant M. She hails from Canberra, Australia, where she completed her undergraduate degree.
Her current research focuses on transition metal catalysis to effect novel transformations, and out of the lab she is an enthusiastic chemistry tutor and science communicator. Come for the colour changing crystals, stay for the science 31 May Synthesis of copper bimetallic complexes from imidazolyl ligands, and the solvatochromic materials formed upon crystallization and solvent guest-exchange.
The solvatochromic behaviour was quantified with visible-region diffuse reflectance spectra. During the first inorganic chemistry course I took during my undergraduate degree, our professor started the class by passing around some mineral samples, promising us that if we pursued the chemistry of metals we could work with beautifully coloured crystals every day.
At the time, colour seemed like such a trite detail amongst the complexity of the subject. Why would you choose a field of study based on something so simple? Well, after a PhD dominated by pale yellow oils, I think I get it now. The authors synthesised organometallic copper complexes, which crystallise to form porous single crystals that drastically change colour upon absorption of various solvents.
Solvatochromic materials are not just made to look pretty; they have potential to be used as sensitive, selective and recyclable sensors to detect solvent vapours with useful applications in industrial process risk management, chemical threat detection and environmental monitoring.More materials for electronic applications could be identified, thanks to the discovery of a new metal-organic framework (MOF) that displays electrical semiconduction with a record high.
Metal organic frameworks (MOFs) have received increasing attention in the field of photoredox catalysis, mainly due to the advantages of the highly porous nanostructure and tunable semiconducting properties. Signature of Metallic Behavior in the Metal−Organic Frameworks M 3(hexaiminobenzene) 2 (M = Ni, Cu) better by semiconducting MOFs, others would see considerable improvements if the MOFs were metallic.
However, there are thus far no examples of metallic MOFs, and demonstrating.
|Metal–organic frameworks as semiconductors||Oct 15, Metal-organic frameworks:|
|Inorganic – Chemical Communications Blog||Request permissions Theoretical and experimental studies on three water-stable, isostructural, paddlewheel based semiconducting metal—organic frameworks X.|
|Supplementary files||A MOC, I learned this week, is a metal-organic cage.|
|Metal–organic frameworks as semiconductors - Journal of Materials Chemistry (RSC Publishing)||Silicon crystals are the most common semiconducting materials used in microelectronics and photovoltaics.|
2 Semiconducting MOFs. Metal–organic frameworks are generally considered to be poor conductors because the linking organic groups are mostly insulators with small π‐orbital conjugation.
However, following the roadmap for implementing MOFs in microelectronic devices by Allendorf. Two-dimensional (2D) MoS2, which has great potential for optoelectronic and other applications, is thermodynamically stable and hence easily synthesized in its semiconducting 2H phase.
This semiconducting behavior, together with its cost-effective production, opens the path for employing metal organic frameworks as active materials in electronic devices.