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A 'cage of cages' is how scientists have described a new type of porous material, unique in its molecular structure, that could be used to trap carbon dioxide and another, more potent greenhouse gas.
Synthesized in the lab by researchers in the UK and China, the material is made in two steps, with reactions assembling triangular prism building blocks into larger, more symmetrical tetrahedral cages – producing the first molecular structure of its kind,) with strong affinity. It also showed excellent stability in water, which would be critical for its use in capturing carbon in industrial settings, from wet or humid gas streams.
Nevertheless, we need to throw everything we can at this global problem. Creating a material of such high structural complexity wasn't easy though, even if the precursor molecules technically assemble themselves..
The more complex the final molecule, the harder it becomes to synthesize and more molecular 'scrambling' could occur in those reactions. To get a handle on those otherwise invisible molecular interactions, the researchers used simulations to predict how their starter molecules would assemble into this new type of porous material. They considered the geometry of potential precursor molecules, and the chemical stability and rigidity of the final product.
France Dernières Nouvelles, France Actualités
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