What is it about?
The review summarizes development of a new concept of molecular recognition that is based on cooperativity of host crystals. While variation in energies of different molecular contacts in inclusion compounds generally is very small, these small differences are summed up in the crystal scale. So, they produce stepwise or switching events in guest inclusion and release, in solid-phase guest exchange and in formation of metastable polymorphs. These events may have unusually high selectivity for neutral guest molecules, which sometimes is absolute.
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Why is it important?
This is a first review with a comprehensive outline of molecular recognition of neutral molecules by crystalline solids. The described 9 types of selectivity in these systems give much more variety to structure-property relationships than can be reached in liquid solutions and adsorption on solid-liquid and gas-solid interface.
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This page is a summary of: Smart Molecular Recognition: From Key-to-Lock Principle to Memory-Based Selectivity, Frontiers in Chemistry, January 2020, Frontiers,
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