Faculty Publications

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Author: search.filters.author.Prabhakar, P.S.Subject: search.filters.subject.Heterogeneous catalyst

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    Synthesis and Characterization of Novel Pd@rGO−CuFe2O4 Magnetic Nanoparticles: A Recyclable Catalyst for C−C Coupling Reaction in Biomass-Derived Organic Solvent
    (John Wiley and Sons Inc, 2023) Teli, Y.A.; Reetu, R.; Singh, P.G.; Patel, M.J.; Dash, S.; Paine, S.; Prabhakar, P.S.; Singh, V.; Keremane, K.S.; Al-Zaqri, N.; Mukherjee, K.; Dutta, S.; Malakar, C.C.
    Development of new, cost effective, stable heterogeneous catalyst for the organic transformations is an important thematic area of research. Present work describes the development of new Pd@rGO−CuFe2O4 catalyst and demonstrates its effectiveness for Suzuki-Miyaura type coupling reactions. The additional advantage of this reaction is its feasibility using biomass-derived solvent like γ-Valerolactone (GVL) in aqueous media. The catalyst is prepared hydrothermally and characterized using XRD, FESEM, EDX, and XPS analysis. The catalyst exhibits excellent activity and recyclability (up to six times) in the C−C coupling reaction to deliver the corresponding biaryl molecules in yields up to 90 %. High efficiency for the conversion of nitriles to amides is also revealed by the prepared catalyst. © 2023 Wiley-VCH GmbH.
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    Ketalization of carbohydrate-derived levulinic esters using cellulose sulfuric acid as a heterogeneous catalyst: a closed-loop biorefinery approach
    (Royal Society of Chemistry, 2025) Prabhakar, P.S.; Dutta, S.
    Levulinic ester ketals (LEKs) are carbohydrate-derived renewable chemicals with potential applications as chemical building blocks, fuel additives, solvents, monomers, and plasticizers. This work reports the synthesis of ethyl levulinate ethylene glycol ketal (LEK 1) and ethyl levulinate propylene glycol ketal (LEK 2) by the ketalization of carbohydrate-derived ethyl levulinate using cellulose sulfuric acid (CSA) as an efficient and recyclable heterogeneous acid catalyst. Cyclohexane was used as the solvent to remove water formed in the reaction by azeotropic distillation, and nearly quantitative isolated yields of LEK 1 and LEK 2 were obtained under optimized parameters. The transformation was optimized on various process parameters, and the CSA catalyst was successfully recycled. Using CSA as a catalyst for producing LEKs shows promise for a closed-loop carbohydrate-centric biorefinery approach. © 2025 The Royal Society of Chemistry.