02088nas a2200181   4500008004100000022001400041245010100055210006900156260011000225300001600335490000600351520132500357100002201682700002801704700002701732700002201759856012501781       2016                        eng d  a2046-206900aCatalytic activity of bare and porous palladium nanostructures in the reduction of 4-nitrophenol0 aCatalytic activity of bare and porous palladium nanostructures i  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN  a11911-119200 v63 a<p>The catalytic activity of bare and porous palladium nanostructures viz. palladium nanoballs (PdNBs) and palladium urchins (Pdurc) synthesized in surfactant based liquid crystalline mesophase have been investigated in the reduction of 4-nitrophenol. The loading of PdNBs and Pdurc nanocatalyst in the reaction are optimized to 1.57 x 10(-4) mol% and 1.57 x 10(-3) mol% respectively. The surface area normalized rate constant obtained at 303 K for PdNBs (0.74 +/- 0.03) s(-1) m(-2) L and Pdurc (0.41 +/- 0.05) s(-1) m(-2) L is the highest, considering the low palladium loading used in the reaction. The specific surface area determined for the PdNBs and Pdurc are 153 m(2) g(-1) and 27 m(2) g(-1) respectively. The high surface area of PdNBs nanostructure is consistent with the highest catalytic activity. The palladium nanostructure catalyzed reaction lacks induction time (t(0)), indicating the influence of porosity in the Langmuir-Hinshelwood mechanism. Besides, PdNBs and Pdurc exhibited thermal stability and structural integrity with good conversion of the substrate (&gt;97%) even up to five consecutive reactions. The mechanistic insight of the bare and porous palladium nanostructures presented in this study is significant for the development of stable and efficient palladium metal based nanocatalyst.</p>1 aKalekar, Ajit, M.1 aSharma, Kiran, Kumar K.1 aLuwang, Meitram, Niraj1 aSharma, Geeta, K.  uhttps://library.ncl.res.in/content/catalytic-activity-bare-and-porous-palladium-nanostructures-reduction-4-nitrophenol-002615nas a2200205   4500008004100000022001400041245010300055210006900158260000900227300001400236490000700250520187800257100002202135700001902157700002402176700002602200700002702226700002802253856012802281       2026                        eng d  a2040-336400aLiquid crystalline nanoconfined growth of PANI on rGO for enhanced electrochemical glucose sensing0 aLiquid crystalline nanoconfined growth of PANI on rGO for enhanc  cMAR   a5531-55430 v183 a<p>
	We report here a new strategy for the successful synthesis of a hybrid 2D nanocomposite via the in situ functionalization of graphene oxide (GO) with aniline monomers in a bi-solvent swollen liquid crystalline lamellar mesophase (SLCLM) nanoreactor. The synthesized nanocomposite product revealed possible simultaneous reactions at the edge and basal plane of GO. A mechanism for the transformation via simultaneous nucleophilic attack and spontaneous polymerization, forming a reduced graphene oxide-polyaniline (rGO-PANI) nanocomposite, is proposed. The multistep plausible reaction mechanism for the functionalization of the GO edge -COOH group is achieved by successful synthesis, followed by isolation and characterization of the N-phenyl anthranilic acid derivative as an intermediate product. Furthermore, the detection of CO2 evolution as a by-product during the reaction complements the plausible mechanism for the incorporation of (-C Xi C-) graphyne-type edges and formation of new -C-N- and O-H bonds in the rGO-PANI nanocomposite. These results are supported by FT-IR, Raman, XPS, SAXS, and C-13 NMR spectroscopy analyses. A reduced graphene oxide-polyaniline (rGO-PANI) modified glassy carbon electrode was developed for glucose sensing, exhibiting a wide linear range (0.554-10 &amp; micro;M), low detection limit (50 pM), and high sensitivity (372 660 &amp; micro;A mM(-1) cm(-2)). The sensor demonstrated excellent selectivity against common interferents (ascorbic acid, uric acid, and dopamine), reproducibility (RSD &lt; 5%), and stability over 10 000 s with minimal signal loss. The detection of glucose from human metabolites, such as urine and sweat, achieved 98-100% recoveries for spiked glucose, confirming its practical applicability. These results establish rGO-PANI as a robust platform for sensitive and selective glucose detection.</p>
1 aTawade, Anita, K.1 aKumar, Praveen1 aTayade, Shivaji, N.1 aSharma, Geetarani, K.1 aLuwang, Meitram, Niraj1 aSharma, Kiran, Kumar K.  uhttps://library.ncl.res.in/content/liquid-crystalline-nanoconfined-growth-pani-rgo-enhanced-electrochemical-glucose-sensing