Sonochemical synthesis and characterization of new nanostructures cobalt(II) metal-organic complexes derived from the azo-coupling reaction of 4-amino benzoic acid with anthranilic acid, salicylaldehyde and 2-naphtol

Xiao-Xue Cheng; Shiva Hojaghani; Mao-Lin Hu; Moayed Hosaini Sadr; Ali Morsali

doi:10.1016/j.ultsonch.2017.02.007

Sonochemical synthesis and characterization of new nanostructures cobalt(II) metal-organic complexes derived from the azo-coupling reaction of 4-amino benzoic acid with anthranilic acid, salicylaldehyde and 2-naphtol

Ultrason Sonochem. 2017 Jul:37:614-622. doi: 10.1016/j.ultsonch.2017.02.007. Epub 2017 Feb 10.

Authors

Xiao-Xue Cheng¹, Shiva Hojaghani², Mao-Lin Hu¹, Moayed Hosaini Sadr², Ali Morsali³

Affiliations

¹ College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China.
² Department of Chemistry, College of Basic Sciences, Tehran Science and Research Branch, Islamic Azad University, Tehran, Islamic Republic of Iran.
³ Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Islamic Republic of Iran. Electronic address: [email protected].

PMID: 28427674
DOI: 10.1016/j.ultsonch.2017.02.007

Abstract

Nanostructures of three new cobalt(II) complexes, (CoL₁)·0.5DMF·1.5MeOH (1), [H₂L₁=5-(4-Carboxy phenyl azo) anthranilic acid], (Co(L₂)₂)·1.5MeOH (2), [HL₂=5-(4-Carboxy phenyl azo) salicylaldehyde] and (Co(L₃)₂)·0.5DMF·0.5MeOH (3), [HL₃=1-(4-Carboxy phenyl azo) 2-naphtol], have been synthesized by the reaction of H₂L₁, HL₂ and HL₃ with Co(OAc)₂·4H₂O through sonochemical process. Calcination of the nano-sized compounds 1-3 yield Co₃O₄ nanoparticles at 450°C under air atmosphere. These nanostructures were characterized by X-ray powder diffraction (XRD) and Scanning Electron Microscopy (SEM). Thermal stability of compounds 1-3 was studied by thermogravimetric (TG) and differential thermal analyses (DTA).

Keywords: Azo coordination polymers; Calcination; Nano-structure; Sonochemical; Thermal decomposition.