The Compressibilities of Liquid Phase Host-Guest Systems

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Abstract

The compressibilities of seven liquid phase, macrocyclic host-guest systems were determined at approximately 25 °C and 3.4 × 107 Pa. Each two-component system consisted of a cyclodextrin, a calixarene, or a crown ether as host and an appropriate solvent as guest. In each case studied, the host-guest system was found to be less compressible than the pure solvent, with the differences ranging from ∼2 to ∼18% of the magnitudes of the pure solvent compressibilities. These findings have enabled us to better understand how strong, ambient pressure, intermolecular host–guest interactions influence the compressibility of solutions. Both inclusion and solvation contribute.

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