Recent Progresses in Catalytic Transformations: A Bridge toward Eco-Nanotechnology

Several reports confirmed that various metals can be complexed with N-containing heterocyclic groups and prepared effective and remarkably catalysts for a variety of fundamentally significant transformations [1]. Among the important heterocyclic compounds, the tetrazoles chemistry, especially for using in coordination chemistry conducted us to synthesis of complex heterocyclic structures. As researches grows in order to the development of designing supported metal catalysts, it has been found that batches of tetrazoles can be coordinated with various metals to produce core-shell nanostructure composites (Figure 1). This is while, there are very few examples of using tetrazoles for the synthesis of core-shell nanostructures [2,3]. It is well known that nanostructures synthesis has attracted much attention in various areas. In addition to chemical approaches to synthesize nanostructures, utility of simple and eco-friendly strategy caused to shift our study toward the green synthesis of metal nanoparticles (MNPs) by using plant extracts (Figure 2) [4,5]. In this context, employment of biological methods for bioreduction of metal ions have obtained opportunities for substituting traditional chemistry methods. Different plant parts could be remarkably valuable to biosynthesis of MNPs which do not provide process to quest for energy efficient but also can be used as an economic and extraordinary alternative for the large-scale production of MNPs. Concerning the extraordinary abilities and benefits of ecofriendly methods, we employed a distinctive and novel procedure through making a green bridge toward the eco-friendly fabrication of core-shell nanostructures using biosynthesis of Fe3O4@SiO2 nanosubstrate.