Effect of ultrasonic output power and initial reagents concentration on size Co(II) coordination polymer nanostructures with terephthalate bridge and Hirshfeld surface analysis

Nano-sized of a new polymeric coordination [Co(H2O)2BDC]n (1), (BDC is benzene 1,4-dicarboxylate or terephthalate) (1:1), was synthesized by sonochemical method. The compound (1) was accomplished in three different concentrations of initial reagents (0.5, 0.25, 0.125M) and three different output power of ultrasonic generator (30, 60, 90W and ultrasonic bath with an output power of 50W). Nano-sized of compound (1) was characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and elemental analyses. The thermal stability of nano particles is studied by thermal gravimetric (TGA) and differential thermal analyses (DTA). The influence of various concentrations of initial reagents and power of ultrasound irradiation, on the morphology and size of nano-structured of compound (1), was studied. The compound (1) is then heated to 550o C to obtain Co3O4 nano particles. The nanoparticles of cobalt oxide are characterized by XRD, FT-IR spectroscopy and SEM images. Hirshfeld surface analysis revealed that the interactions O…O (25.7%), O···H (15.8%), C···O interactions (12.0%) and Co···O (9.0%) play the major role in the stability of the crystal structure.