Sonochemical synthesis and characterization of new seven coordinated zinc, cadmium and mercury nitrate complexes: New precursors for nanostructure metal oxides

Abstract

The nitrate complexes of group 12 elements with a tridentate Schiff base ligand (L = (E)-N1-((E)-3- phenylallylidene)-N2-(2-((E)-((E)-3-phenylallylidene) amino)ethyl) ethane-1,2-diamine) were synthesized via sonochemical process and characterized by various physical and chemical methods. The structural analysis of the zinc nitrate complex by single crystal X-ray diffraction analysis shows that the central atom is seven-coordinated by three nitrogen atoms from the Schiff base ligand as well as four oxygen atoms from two different nitrate anions. The geometry around the metal center can be described as a distorted pentagonal bipyramid. The crystal packing analysis of zinc nitrate complex indicates that the intermolecular interactions related to nitrate groups plays the essential role in the orientation of supramolecular structure. Hirshfeld surfaces (HS) and their corresponding fingerprint plots (FP) have been also used for further investigation of crystal structure of zinc nitrate complex. Furthermore thermal analyses (TG/DTG) of three nanostructure complexes were carried out and discussed. Finally, direct thermolysis of zinc and cadmium nitrate complexes in air atmosphere led to the production of zinc and cadmium oxide nanoparticles.

Synthesis and Photophysical Properties of Multi‐Functional Bisimidazolyl Phenol Zinc (II) Complex: Application in OLED, Anti‐Counterfeiting and Latent Finger Print Detection

“…From the IR spectrum of BDI, band at 1624 cm −1 in was assigned for C=N stretching; however, it was further shifted in at 1613 cm −1 in the case of Zn‐BDI, suggesting the possible complexation. The appearance of the new 455 cm −1 in Zn‐BDI is attributable to the Zn−N bond [24] . The band‘s disappearance at 3,427.11 cm −1 corresponding to the phenolic‐hydroxyl group indicates the most favorable involvement of the hydroxyl group in the Zn‐BDI complex formation (See: Supporting information).…”

“…The appearance of the new 455 cm À 1 in Zn-BDI is attributable to the ZnÀ N bond. [24] The band's disappearance at 3,427.11 cm À 1 corresponding to the phenolic-hydroxyl group indicates the most favorable involvement of the hydroxyl group in the Zn-BDI complex formation (See: Supporting information). The 1 H NMR spectrum of the ligand BDI shows a characteristic peak at 12.73 ppm, corresponding to intramolec-ular hydrogen bond; apparently, it was found to be absent in Zn-BDI.…”

Chemical‐ vs sonochemical‐assisted synthesis of ZnO nanoparticles from a new zinc complex for improvement of carotene biosynthesis fromRhodotorula toruloidesMH023518

“…[23,24] As coordination compounds are usually nontoxic and of flexible structures, several zinc coordination compounds are suitable precursors for preparation of ZnO NPs. [25][26][27][28][29] However, sonolysis is known to cause cavitation during synthesis of various products, as it affords formation, collapse, and growth of bubbles that result in introduction of high pressure and temperature spots affecting the size of the products. [30][31][32][33][34] In this research, we managed to prepare a new zinc complex of the ligand 2-(((3,4-dimethylphenyl)imino)methyl)phenol by two routes (chemical vs sonochemical) that both afforded different size ZnO NPs upon calcination.…”