Crystallization process design strategy

In the case of intercalates we have seen how the inclusion of guests swells the layers, such that the materials respond dynamically to the intercalation process. We now turn to a different approach in which a crystal engineering based design strategy has created rigid, well-defined materials based on ionic hydrogen-bonded solids in which polar guanidinium disulfonate layers - (C(NH2)3+)2... 

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