چكيده فارسي :
Nanomaterials and Nanotechnologies attract tremendous attention in recent researches. Nanomaterials in the size range of 3–50 nm have received increased attention in the last few decades because they exhibit physical properties that are intermediate to those of individual molecules and bulk materials [1].
Cobalt (II, III) oxide (Co3O4) is a technologically important material with applications in lithium-ion batteries, heterogeneous catalysts, gas sensing, ceramic pigments, and electrochemical devices. This transition metal oxide, when falling in the nanosized regime, is expected to lead to even more attractive applications in the conjunction of their traditional area and nanotechnology [2]. The present investigation reports, the synthesis and characterization of cobalt (II, III) oxide (Co3O4) nanoparticles using co-precipitation and using as catalyst for synthesis of xanthenes.
Xanthene is pharmacologically important oxygen-containing as heterocyclic moiety exhibiting an array of potent biological activities like antibacterial, antiviral, anti-inflammatory, antitumor, antioxidant, anti-plasmodial etc. Also this review gives the method for the construction of xanthenes by cobalt oxide nanoparticle as catalyst [3]. Many of the reported methods involve the use of various harsh catalysts/reagents that are not environmentally benign, produce a large amount of waste and need longer reaction times. Among various chemical methods for preparing cobalt oxide nanoparticles, in this research the co-precipitation method is used to the process simplicity.
In this research, the synthesis of cobalt oxide nanoparticles was investigated and used as a heterogeneous catalyst, also as an efficient in the synthesis of xanthene derivatives as developing new eco-friendly, efficient and economical valuable method.
