*2.7.1. Thermogravimetric molecular porous materials characterization*

Materials under study lose the total number of molecules of water (both the coordinates and the zeolite) between 90°C and 180°C. The temperature dehydrated in a total way is highly linked with the polarizing power of the outer material, in addition to electrostatic forces with water molecules. Dehydration temperatures carry the following order: (117.54 °C) > Mn (106.57 °C) > Co (99.26 °C) > Cd (89.82 °C) > Cu> Zn (67.44 ° C). This sequence of dehydration can be seen clearly in Figure 14, in addition to showing the corresponding graphics of the derivative for each sample. In the particular case of the material with Zinc as metal coordination, low temperatures of dehydration due to the tendency of this material to adopt a tetrahedral coordination by forming a rhombohedral phase, which tends to be anhydrous. In these materials, for all the samples, the water molecules, both the coordinates and that of the zeolitic type, leave the system through a virtually continuous and simple process, resulting in dehydration cooperatively between the two types of water resulting in TG profiles without well-defined inflections, although at the beginning of all samples, a slight disturbance is recorded by the team (through the measurement of Ea).

**Figure 14.** Thermogravimetric (TG) curves and the corresponding derivative (DTG) that expresses the progress of de‐ hydration.

**Figure 15.** TG and DTG profile, modulation of temperature, and time set on a measure imposed on high resolution and modulated for material Co3 [Co(CN)6]2xH2O.

As an example of a deeper analysis system, cadmium hexacyano-cobaltates are considered. In addition to being plotted and based on the weight loss derived from the corresponding weight, Figure 15 will also include the time of the process and the derivative of the temperature modulation time. The latter refers to the temperature disturbance along throughout the dehydration process, and the information provided is the resistance of the phenomenon, that is, as the modulation is increasing, the resistance of the water molecules evolves in the system. So, considering a constant disturbance implies that water molecules get out of the system without offering any more resistance. This agrees with what the Ea charts show.
