02933nas a2200169 4500008004100000022001400041245018600055210006900241260011000310300001600420490000600436520213700442100001702579700002202596700001802618856012702636 2014 eng d a2046-206900aSynthesis and characterization of 3-[N,N `-bis-3-(salicylidenamino)ethyltriamine] Mo(VI)O-2@SBA-15: a highly stable and reusable catalyst for epoxidation and sulfoxidation reactions0 aSynthesis and characterization of 3NN bis3salicylidenaminoethylt aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAR a14063-140730 v43 a

The efficient and reusable oxidation catalyst 3-[N,N'-bis-3-(salicylidenamino)ethyltriamine] Mo(VI)O-2@SBA-15 has been synthesized by the anchoring of the 3-[N,N-bis-3-(salicylidenamino)ethyltriamine] ligand (L or Salpr) on the inner surfaces of organofunctionalized SBA-15 and subsequent complexation with Mo(VI) O-2(acac)(2). The physico-chemical properties of the functionalized catalysts were analyzed by elemental analysis, ICP-OES, XRD, N-2-sorption measurements, TG & DTA, solid state C-13, Si-29 NMR spectroscopy, FT-IR, Raman spectroscopy, XPS, DRS UV-Vis spectroscopy, SEM and TEM. XRD and N-2 sorption analyses helped to find out the morphological and textural properties of the synthesized catalysts and confirm that an ordered mesoporous channel structure was retained even after the multistep synthetic procedures. The (100), (110) and (200) reflections in SBA-15 provide hints of a good structural stability, the existence of long range ordering and a high pore wall thickness. TG and DTA results reveal that the thermal stability of (L)Mo(VI)O-2@SBA-15 was maintained up to 300 degrees C. The organic moieties anchored over the surface of the SBA-15 support were determined by solid state C-13 NMR and FT-IR spectroscopy. Further, solid state Si-29 NMR spectroscopy provides the information about the degree of functionalization of the surface silanol groups with the organic moiety. The electronic environment and the oxidation state of the molybdenum site in (L)Mo(VI)O-2@SBA-15 were monitored by Raman spectroscopy, XPS and DRS UV-Vis techniques. Moreover, the morphology and topographic information of the synthesized catalysts were confirmed by SEM and TEM imaging. The synthesized catalysts were evaluated in epoxidation and sulfoxidation reactions, and the results show that (L)Mo(VI)O-2@SBA-15 exhibits high conversion and selectivity towards epoxidation and sulfoxidation reactions in combination with high stability. The anchored solid catalysts can be recycled effectively and reused several times without major loss in activity. In addition, Sheldon's hot filtration test was also carried out.

1 aLazar, Anish1 aThiel, Werner, R.1 aSingh, A., P. uhttps://library.ncl.res.in/content/synthesis-and-characterization-3-nn-bis-3-salicylidenaminoethyltriamine-movio-2sba-15-001831nas a2200169 4500008004100000022001400041245014100055210006900196260011000265300001400375490000700389520106800396100001701464700002801481700002201509856013001531 2016 eng d a1144-054600aSimple, phosphine free, reusable Pd(II)-2,2 `-dihydroxybenzophenone-SBA-15 catalyst for arylation and hydrogenation reactions of alkenes0 aSimple phosphine free reusable PdII22 dihydroxybenzophenoneSBA15 aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN a2423-24320 v403 a

An efficient, simple, phosphine and co-catalyst free C-C coupling reaction heterogeneous catalyst via a post grafting method is developed and reported. A covalently anchored phosphine free Pd(II) based 2,2'-dihydroxybenzophenone (DHBP) complex over organofunctionalized SBA-15 has been synthesized by the reaction between aminofunctionalized SBA-15 (NH(2)SBA-15) and a 2,2'-dihydroxybenzophenone (DHBP) ligand, and further complexation with Pd(II)Cl-2 to get Pd(II)-DHBP@ SBA-15. The synthesized catalysts were characterized by elemental analysis, XRD, N-2 sorption analyses, TG, DTA, FT-IR, solid state C-13 and Si-29 NMR spectra, XPS, UV-Visible, SEM, EDAX and TEM. The synthesized catalysts were screened in arylation (Heck reactions) and hydrogenation reactions of alkenes, and the results show that Pd(II)-DHBP@ SBA-15 exhibits high conversion and selectivity towards arylation and hydrogenation reactions of alkenes with high stability. The anchored solid catalysts can be recycled effectively and reused several times without major loss in activity.

1 aLazar, Anish1 aVinod, Chathakudath, P.1 aSingh, Anand, Pal uhttps://library.ncl.res.in/content/simple-phosphine-free-reusable-pdii-22-dihydroxybenzophenone-sba-15-catalyst-arylation-and01658nas a2200241 4500008004100000022001400041245013300055210006900188260000800257300001200265490000600277520079500283653002901078653001901107653002801126653002401154100002601178700001801204700001701222700002201239700002801261856012701289 2016 eng d a2365-654900aSynthesis of Au@Ni bimetallic core shell nanoparticle and nanochains in soyabean oil and their catalytic hydrogenation reactions0 aSynthesis of AuNi bimetallic core shell nanoparticle and nanocha cFEB a140-1460 v13 a

Synthesis of Au@Ni bimetallic core shell nanostructures using commercially available soya bean oil as the solvent through a sequential reduction strategy is reported. The energy efficiency and economic viability comes from the much milder temperatures and replacement of expensive and environmentally hazardous solvents like long chain organic amines and acids previously reported for synthesis. Thus, core shell nanoparticles having size regime of 10-15 nm with an excellent control over the nickel shell thickness (2 nm) over the gold core (8-10 nm) and Au@Ni nanochains is achieved. The synthesized materials are demonstrated to synergistically catalyze hydrogenation of nitro and C-C multiple bonds with much better efficiency as compared to individual nanoparticle counterparts.

10aBimetallic nanoparticles10aGold catalysis10ahydrogenation reactions10asynergistic effects1 aBharathan, Vysakh, A.1 aYadukiran, V.1 aLazar, Anish1 aSingh, Anand., P.1 aVinod, Chathakudath, P. uhttps://library.ncl.res.in/content/synthesis-auni-bimetallic-core-shell-nanoparticle-and-nanochains-soyabean-oil-and-their02091nas a2200277 4500008004100000022001400041245017600055210006900231260000800300300001400308490000700322520109300329653001301422653002801435653001901463653001401482653002401496100002601520700002101546700001701567700002101584700002801605700002101633700002801654856013101682 2018 eng d a1867-388000aSelective oxidation of cyclohexane to cyclohexanone using chromium oxide supported mesoporous MCM-41 nanospheres: probing the nature of catalytically active chromium sites0 aSelective oxidation of cyclohexane to cyclohexanone using chromi cAUG a3291-32980 v103 a

Highly dispersed chromium oxide supported mesoporous MCM-41 nanosphere catalysts have been synthesized using a simple wet impregnation method. This work is devoted to a systematic study to reveal the active Cr sites in chromium oxide supported MCM-41 nanosphere catalysts for the selective oxidation of cyclohexane to cyclohexanone. To probe the nature of the active species, we synthesized 0.5-10wt% Cr loaded catalysts and characterized them by using XRD, UV/Vis spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, extended X-ray absorption fine structure analysis, X-ray absorption near edge structure analysis, N-2 sorption analysis, FTIR spectroscopy, (SiNMR)-Si-29 spectroscopy, SEM, and TEM. The liquid-phase oxidation of cyclohexane to cyclohexanone (99% selectivity) was performed under mild reaction conditions, and the results reveal clearly that the 5wt% Cr loaded catalyst was optimum for the reaction. The initial composition of isolated Cr3+ species in the catalyst is the major factor that influences the enhanced activity for cyclohexane oxidation.

10achromium10aheterogeneous catalysis10aNanostructures10aOxidation10asupported catalysts1 aBetsy, Kurisingal, J.1 aNayak, Chandrani1 aLazar, Anish1 aKrishnan, Athira1 aBhattacharyya, Dibyendu1 aJha, Shambhu, N.1 aVinod, Chathakudath, P. uhttps://library.ncl.res.in/content/selective-oxidation-cyclohexane-cyclohexanone-using-chromium-oxide-supported-mesoporous-mcm