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Padmanaban, Sudakar,Kim, Minog,Yoon, Sungho THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2019 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY -S Vol.71 No.-
<P><B>Abstract</B></P> <P>Engineering the surface of Metal-organic frameworks (MOFs) will afford to advantageously improve their performances in catalysis. A particular example of industrially applied MOF-based catalysis is the zinc glutarate (ZnGA) catalyzed copolymerization of CO<SUB>2</SUB> with an epoxide. Herein, we demonstrate how the modification of the surface of ZnGA aids to enhance its productivity in fixing CO<SUB>2</SUB> into poly(alkylene carbonates), and deliver an industrially viable procedure to prepare a nanosized, surface-etched ZnGA by systematically controlling the reaction conditions and by using a mild-HCl solution. This surface modified-ZnGA exhibits ∼83% increased productivity than the standard-ZnGA and thus could be readily applicable in industries.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Sudakar Padmanaban,이윤호,윤성호 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-
Selective hydrogenation of the carbonyl functional group of α,β-unsaturated carbonyl compounds affordsindustrially important allylic alcohols. However, achieving the selective reduction of the carbonyl groupin the presence of the activated olefinic group is challenging. Therefore, the development of a highlychemoselective, efficient, and recyclable catalyst for this transformation is greatly desirable from theindustrial and environmental viewpoints. In this study, a Ru-immobilized bisphosphine-based porousorganic polymer (Ru@PP-POP) was used as an efficient heterogeneous catalyst for chemoselectivehydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol with high chemoselectivity (98%) andexcellent recyclability. To the best of our knowledge, the catalyst, Ru@PP-POP showed a high turnovernumber (970) and a high turnover frequency (240 h 1) which is the best activity obtained using aphosphine based heterogeneous Ru-catalyst in this transformation.
Sudakar Padmanaban,김민옥,윤성호 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.71 No.-
Engineering the surface of Metal-organic frameworks (MOFs) will afford to advantageously improve theirperformances in catalysis. A particular example of industrially applied MOF-based catalysis is the zincglutarate (ZnGA) catalyzed copolymerization of CO2 with an epoxide. Herein, we demonstrate how themodification of the surface of ZnGA aids to enhance its productivity infixing CO2 into poly(alkylenecarbonates), and deliver an industrially viable procedure to prepare a nanosized, surface-etched ZnGA bysystematically controlling the reaction conditions and by using a mild-HCl solution. This surfacemodified-ZnGA exhibits83% increased productivity than the standard-ZnGA and thus could be readilyapplicable in industries.
한성구,백승일,이원규,Padmanaban Sudakar,유연규 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.1
Human lysophosphatidic acid receptor 1 (LPA1) is a G-protein coupled receptor that mediates various biological functions such as proliferation, platelet aggregation, smooth muscle contraction, and tumor cell invasion. For dissection of the molecular function of LPA1 , a recombinant LPA1 was overexpressed in Escherichia coli membrane fractions and purified to homogeneity by single affinity chromatography. The purified LPA1 was stabilized with an amphiphilic polymer that was synthesized by the coupling of octylamine, glucosamine, and diethylaminoproylamine at the carboxylic groups of poly-γ-glutamic acid. The complex of purified LPA1 and amphiphilic polymer showed a monodisperse oligomer and specific binding to LPA with apparent Ki values of 30 μM. Compared with the Gs protein, it also showed selective binding to the alpha subunit of the Gi protein. These results indicate that recombinant LPA1 in an amphiphilic polymer complex has an active conformation for interaction with ligands and G-proteins.