Science

How a crystalline sponge sheds water molecules

How a crystalline sponge sheds water molecules

How does water leave a sponge? In a new study, scientists answer this question in detail for a porous, crystalline material made from metal and organic building blocks — specifically, cobalt(II) sulfate heptahydrate, 5-aminoisophthalic acid and 4,4′-bipyridine. Using advanced techniques, researchers studied how this crystalline sponge changed shape as it went from a hydrated state to a dehydrated state.

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