Browsing by Author "Kalidindi, Suresh Babu"

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    Acidic graphene organocatalyst for the superior transformation of wastes into high-added-value chemicals
    (2022) Kalidindi, Suresh Babu
    Our dependence on finite fossil fuels and the insecure energy supply chains have stimulated intensive research for sustainable technologies. Upcycling glycerol, produced from biomass fermentation and as a biodiesel formation byproduct, can substantially contribute in circular carbon economy. Here, we report glycerol’s solvent-free and room-temperature conversion to high added-value chemicals via a reusable graphene catalyst (G-ASA), functiona lized with a natural amino acid (taurine). Theoretical studies unveil that the superior performance of the catalyst (surpassing even homogeneous, indus trial catalysts) is associated with the dual role of the covalently linked taurine, boosting the catalyst’s acidity and affinity for the reactants. Unlike previous catalysts, G-ASA exhibits excellent activity (7508 mmolg−1 h−1)andselectivity (99.9%) for glycerol conversion to solketal, an additive for improving fuels’ quality and aprecursorofcommodityandfinechemicals.Notably,thecatalyst is also particularly active in converting oils to biodiesel, demonstrating its general applicability.
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    An exfoliated redox active imide covalent organic framework for metal free hydrogen gas sensing†
    (2023) Kalidindi, Suresh Babu
    A two dimensional (2D) redox active donor–acceptor COF made of triphenylamine (TPA) and naphthalenediimide (NDI) acted as an efficient hydrogen chemisresistor and performed better than traditional metal oxides. Calculations have shown that the charge transfer interaction between H2 and an NDI linker through a carbonyl functionality enables a change in the resistance of the material upon exposure to H2 gas.