On the thermal properties of metal (II) complexes of chalcone

The preparation of chalcone ligand and complexes of zinc, cadmium, mercury with chalcone is described. Thermogravimetric measurements made on these samples show ligand to be more stable than the metal complexes as it exhibits higher initial decomposition temperature. Thermal diffusivity of these four samples is measured by photoacoustic technique at room temperature to find the influence of coordination of metal on the thermal properties of chalcones. Experimental results indicate that the thermal diffusivity of chalcone metal complexes is enhanced when compared to the parent ligand. If we consider the free electron density of metals, then the increase may be understood from the electronic contribution of metals to the thermal property. So among metal complexes, thermal diffusivity increase with the increase in the free electron density of the metal ion coordinated.