Magnetic Iron nanoparticles grafted with Schiff base and Schiff-base Sn complexes for application in catalysis

Manpreet Kaur, Prashant Kumar, Anita Singla, VeerannaYempally, Harminder Kaur
2021 Zenodo  
Modified Fe3O4 nanoparticles display selective catalytic activity with less tedious experimental procedures under mild reaction conditions (1). Difficulty in product separation and use of harsh parameters, in the catalytic conversion of anthracene to industrially important 9,10 anthraquinone is becoming significant challenge in the field of catalysis (2). In the present study, novel Fe3O4@SB@Sn system was explored in order to address the existing crucial challenges in the catalytic oxidation of
more » ... anthracene. Methods: The Co-precipitation method was employed for the synthesis of bare Fe3O4 nanoparticles. The modified heterogeneous system was developed by sequential coating with Schiff base (SB) and (CH3)2SnO. Results &Discussions: Fig. 1(a) illustrate the additional peaks corresponding to C=N. C=O and C-C bond stretching's after the attachment of SB on the surface of Fe3O4 nanoparticles (3). Fig. 1(b) represents the TGA plot, which indicates the enhanced thermal stability of final catalyst. Various catalytic parameters including different catalyst, concentration of H2O2 (Oxidant), temperature were tested for this particular reaction and given in Fig. 1(c). Conclusions: The novel and re-usable catalytic system Fe3O4@SB@Sn produce 9,10 anthraquinone with 100% selectivity and 92.4% conversion (Reaction conditions: 0.5 mmol anthracene, 0.02 mmol catalyst, 10 ml acetonitrile, 3 mmol H2O2(oxidant), refluxing at 70 0C for 5 h). Presence of synergic effect of both metals i.e. Fe and Sn is responsible for the enhancement in the catalytic activity of Fe3O4@SB@Sn. Keywords: Fe3O4 nanoparticles; Schiff base; catalytic oxidation of Anthracene, 9,10 anthraquinone Acknowledgment</stron [...]
doi:10.5281/zenodo.5362743 fatcat:butqnk4ganhmnpjib4i4yadj6a