Selective recognition of “solvent” molecules in solution and the solid state by 1,4-dimethoxypillar[5]arene driven by attractive forces

Highly selective binding of “solvent” molecules by 1,4-dimethoxypillar[5]arene (DMP[5]A) and their host–guest complexation in solution and the solid state have been investigated by multiple methods. Enthalpy changes and the size-fit effect play an important role in the high selectivity.