Letting out the guests: The hexagonal closest packing of discrete triangular-tube-shaped organometallic supermolecules of eclipsed-[{Ru2(CO)4(PPh3)2}(μ-4,4′-O2CC6H4C6H4CO2)]3 in the solid state (see picture) permits the production of a microporous material that is not only thermally stable up to 181 °C, but also allows diffusion at room temperature of molecular guests without the framework collapsing.
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Shiu et al. (2003) studied this question.
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