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The coordination polymer synthesized by the reaction between porous copper terephthalate and 4,4′-bipyridine (4,4′-bipy) has a porous structure consisting of two mutually interpenetrating three-dimensional frameworks with large cavities. It exhibits novel adsorption behavior and has a dynamic structure in which its own frameworks change in response to external stimuli such as pressure.
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Kenji Seki (2002) studied this question.
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