Effect of solvent and initial reagents concentration in sonochemical synthesis Cu(II) coordination polymer nanostructures and Hirshfeld surface analysis

Nano-sized of a copper (II) coordination polymer [Cu3(L)(NO3)4(H2O)4]n (1) {H2L=[2,6-bis(pyridine-2-ylmethylidene) hydrazinocabonyl] pyridine} compound was synthesized by sonochemistry method. To study the influence of solvent and concentrations of initial reagents on the nano-sized compound (1) certain test was designed and six samples of 1 were prepared through the sonochemical irradiation process. Polar solvent led to smaller and uniform nanostructure particle morphology. To prepare copper (II) oxide nano-sized by calcination specimen of 1 was used as a precursor. The structure and morphology of nanoparticles are characterized by using scanning electron microscopy (SEM), x-ray powder diffraction (XRD) and IR spectroscopy. The thermal stability of nano compound 1 was studied by thermal gravimetric (TGA) and differential thermal analyses (DTA). In order to study the optical behavior of the prepared compound 1 as nanoparticle and bulk form the UV-Vis absorption spectral along with photoluminescence was carried. Hirshfeld surface analysis and two-dimensional fingerprint plots were used to analyze the intermolecular interactions, indicating that the most important contributions for the crystal packing are from O…H/H…O (31.7%), H…H (14.6%), C…C (6.5%), N…O (3.8%) and N…H/H…N (3.8%).