BITS Faculty Publications

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Author: search.filters.author.Khungar, BhartiSubject: search.filters.subject.Catalyst

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    Imidazolium ionic liquid-tagged palladium complex: an efficient catalyst for the Heck and Suzuki reactions in aqueous media
    (RSC, 2014) Kumar, Anil; Sivasubramanian, S.C.; Khungar, Bharti
    An air stable, water soluble, and efficient ionic liquid-tagged Schiff base palladium complex was prepared. The synthesized complex was well characterized by NMR, mass spectrometry, FT-IR, UV-visible spectroscopy and powder X-ray diffraction. The complex was used as a catalyst for the Suzuki and Heck cross-coupling reactions in water. Good to excellent yields were achieved using a modest amount of the catalyst. In addition, the catalyst can be easily reused and recycled for six steps without much loss in activity, exhibiting an example of sustainable and green methodology
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    Synthesis, characterization and applications of imidazolium ionic liquid-tagged zinc(II) complex
    (Elsiever, 2018) Khungar, Bharti; Nehra, Pankaj; Sivasubramanian, S.C.; Jha, Prabhat N.
    A multi-functional zinc(II) complex of an imidazolium ionic liquid-tagged ligand was synthesized and characterized. The DSC and TGA analysis showed the thermal stability of the complex. The complex showed emission λmax at 368–467 nm with quantum yields up to 0.06. The time-resolved fluorescence study revealed enhancement in lifetime on complexation with zinc(II) ion indicating conformational rigidity. The complex showed good DNA cleavage, antifungal and antibacterial activities against Gram +ve and Gram −ve bacteria. The complex was found to be a good catalyst for the reaction of aromatic aldehydes and indole substrates in water to synthesize bis(indolyl)methanes.