Faculty Publications

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Publications by NITK Faculty

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Author: search.filters.author.Buruga, K.Subject: search.filters.subject.Chemical reactions

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    Microwave assisted synthesis of bithiophene based donor-acceptor-donor oligomers and their optoelectronic performances
    (Elsevier B.V., 2017) Bathula, C.; Buruga, K.; Lee, S.K.; Khazi, I.A.M.; Kang, Y.
    In this article we present the synthesis of two novel bithiophene based symmetrical ? conjugated oligomers with donor-acceptor-donor (D-A-D) structures by microwave assisted PdCl2(dppf) catalyzed Suzuki coupling reaction. These molecules contain electron rich bithiophene as a donor, dithienothiadiazole[3,4-c]pyridine and phthalic anhydride units as acceptors. The shorter reaction time, excellent yields and easy product isolation are the advantages of this method. The photophysical prerequisites for electronic application such as strong and broad optical absorption, thermal stability, and compatible energy levels were determined for synthesized oligomers. Optical band gap for the oligomers is found to be 1.72–1.90 eV. The results demonstrated the novel oligomers to be promising candidates in organic optoelectronic applications. © 2017 Elsevier B.V.
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    Green synthesis of palladium nanoparticles using fenugreek tea and their catalytic applications in organic reactions
    (Elsevier B.V., 2017) Mallikarjuna, K.; Bathula, C.; Buruga, K.; Shrestha, N.K.; Noh, Y.-Y.; Kim, H.
    In this communication, we present the fenugreek tea aided green synthesis of Pd nanoparticles (PdNPs@FT). The synthesized PdNPs were characterized by UV–Visible spectroscopy, scanning electron microscopy (SEM), small area electron diffraction (SAED), fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). FT-IR manifested that polyol and amide groups present in fenugreek may have participated in the synthesis of palladium nanoparticles. PdNPs@FT exhibited high catalytic activity towards hydrogenation of 4-nitrophenol to 4-aminophenol. PdNPs@FT catalyzed Suzuki–Miyaura coupling reaction between bromobenzene and phenyl boronic acid gave desired biphenyl in excellent yield. © 2017 Elsevier B.V.