Applications of Magnetically Active Nanocatalyst in Sustainable Organic Transformations

Chaturvedi, Ashwin (2019) Applications of Magnetically Active Nanocatalyst in Sustainable Organic Transformations. Masters thesis, Indian Institute of Science Education and Research Kolkata.

PDF (MS dissertation of Ashwin Chaturvedi (14MS118)) 14MS118.pdf - Submitted Version Restricted to Repository staff only Download (4MB)

Abstract

Magnetically active nanocatalysts have been successfully prepared by a simple one-pot synthesis method. catalysts are well characterized by X-ray diffraction (XRD),transmission electron microscopy (TEM) and scanning electron microscopy (SEM). We prepared ruthenium magnetic nanoparticles(Fe₃O₄@SiO₂@Ru) and explored its application in the acceptorless dehydrogenative coupling reactions. The catalyst can be readily prepared in gram quantitites under closed atmosphere. The catalyst used in the synthesis of α,β-unsaturated compounds was effortlessly recovered from the reaction mixture by a simple and comfortable magnetic separation of products using an external magnet. In the second part of the research, we focused our goal in synthesizing such a heterogeneous photo catalyst which could be rescued once the reaction gets over and could be reutilized further with significant efficiency of the catalyst. For the aforementioned C-H functionalization of arenes and heteroarenes, we have used magnetic nanoparticles of Fe₃O₄, which satisfy the criteria of heterogeneous photocatalyst and could easily be excited by applying green LEDs and also could be recovered by applying simple magnetic separation way.

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