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Flexible and dynamic coordination polymers based on interpenetration and interdigitation have been synthesized and characterized. Reversible crystal-to-crystal transformation from a nonporous structure (24 m2 g−1) to a microporous structure (at least 320 m2 g−1) is triggered by adsorption of various supercritical gases (see picture).
Kitaura et al. (Mon,) studied this question.