Figure 5: Study of dielectric behaviour of bulky 1 and MOF thin film.

(a) κ of powdered 1 and thin films after removal of the guest molecules. (b) Dielectric constant κ of an MOF film during the heating process. (c) Schematic of the space-charge distribution in the MOF thin film and in bulk MOFs. (d) Representative evolution of the dielectric constant of the MOF film during a heating and cooling cycle from 55 to 125 °C. The arrow indicates the temperature sequence.