'Molecular trapdoor' opens only for CO2 | Chemistry World - A family of nanoporous materials well known for their gas separation properties can sort molecules with much more sophistication than previously thought. Researchers in Australia have discovered that certain zeolites don’t act as simple molecular sieves, but rather separate molecules according to their ability to open ‘molecular trapdoors’ within the zeolite structure. Carbon dioxide molecules are particularly adept at slipping through these trapdoors, making it a promising discovery for industrial gas separation technologies such as carbon capture.(10.1021/ja309274y)

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