A Metalloprotein Inspired Ruthenium Complex as an Efficient and Reusable Catalyst for Selective Oxidation of Alcohols to their Corresponding Carbonyl Compounds. Issue 18 (11th November 2016) - Jamatia, Ramen
Abstract: Metalloprotein inspired self‐assembled ruthenium catalyst (3 ) was prepared from a linear amphiphilic polymer poly( N ‐isopropylacrylamide‐co‐ N ‐vinylimidazole) (1 ) and ruthenium trichloride (2 ) via coordinative convolution. The ruthenium catalyst (3 ) was characterized using TEM, SEM, EDX, Powder XRD, TGA and XPS analysis. The polymer (1 ) was analysed using various characterization techniques such as FT‐IR, 1 H and 13 C NMR and GPC analysis. The prepared ruthenium catalyst (3 ) was highly stable, globular, highly active and reusable. The ruthenium catalyst in 863 mol ppm level (with respect to ruthenium) could catalyse the selective oxidation of various alcohol substrates efficiently within a short period of time. The catalyst could be separated by simple filtration and reused for another five consecutive runs without substantial loss in activity of catalyst or yield of product. The Turn over number (TON) and Turn over frequency (TOF) of the catalyst reached 1031 and 516 h ‐1 respectively. An ICP‐AES analysis of the organic phase of the reaction revealed insignificant (0.709 ppm of Ru) leaching of the catalyst. Abstract : A Metalloprotein inspired self‐assembled ruthenium catalyst was prepared. This ruthenium catalyst (3 ) was highly stable, active and reusable. 863 mol ppm catalyst could catalyze the selective oxidation of various alcohols efficiently within a short time. The TON and TOF of the catalyst are 1031 and 516 h ‐1, respectively. ICP‐AES analysis revealed insignificant (0.709 ppm of Ru) leaching of the catalyst.