02237nas a2200217   4500008004100000022001400041245013900055210006900194260007000263300001400333490000700347520137400354653001001728653001701738653002901755653003701784100002501821700002801846700002301874856012201897       2010                        eng d  a0352-513900aLiquid-liquid extraction and recovery of gallium(III) from acid media with 2-octylaminopyridine in chloroform: analysis of bauxite ore0 aLiquidliquid extraction and recovery of galliumIII from acid med  aKARNEGIJEVA 4, 11 120 BELGRADE, SERBIAbSERBIAN CHEMICAL SOCcApr  a1099-11130 v753 a<p>The liquid liquid extraction of gallium(III) from hydrochloric acid solution using 2-octylaminopyridine (2-OAP) in chloroform was investigated. The extraction of gallium(III) from 6.0-9.0 mol dm(-3) hydrochloric acid was found to be quantitative using 0.033 mol dm-3 2-OAP in chloroform. The effect of the reagent concentration and other parameters on the extraction of gallium(111) was also studied. The stoichiometry of the extracted species of gallium(In) was determined based on the slope analysis method. The extraction reaction proceeded via the anion exchange mechanism from hydrochloric acid and the extracted species was [RR'NH(2)(+)GaCl(4)(-)](org). The extraction of gallium(III) was performed in the presence of various ions to ascertain the tolerance limit to individual ions. The temperature dependence of the extraction equilibrium constants was examined to estimate the apparent thermodynamic functions (Delta H, Delta S and Delta G) for the extraction reaction. Gallium(III) was successfully separated from commonly associated metal ions, such as Zn(II), Pb(II), Cd(II), Hg(II), Bi(III), Al(III), Se(IV), Sb(III), Sn(IV), In(III), TI(I) and TI(III). However, gallium(III) was separated from Fe(III) from weak organic acid media. The procedure was also extended to the determination of gallium(III) in bauxite ore by the standard addition method.</p>10a2-OAP10agallium(III)10aliquid-liquid extraction10arecovery of gallium from bauxite1 aMahamuni, Sandip, V.1 aWadgaonkar, Prakash, P.1 aAnuse, Mansing, A.  uhttps://library.ncl.res.in/content/liquid-liquid-extraction-and-recovery-galliumiii-acid-media-2-octylaminopyridine-002073nas a2200169   4500008004100000022001400041245009600055210006900151260011000220300001600330490000700346520132300353100004301676700002801719700003101747856012501778       2014                        eng d  a1463-907600aLinearly polarized emission from self-assembled microstructures of mesogenic polythiophenes0 aLinearly polarized emission from selfassembled microstructures o  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP  a23809-238180 v163 a<p>This work reports on linearly polarized photoluminescence and electroluminescence through spontaneous self-assembly of mesogenic polythiophenes under ambient conditions. A systematic structural variation and different alkyl chain lengths lead to three series of closely related mesogenic polythiophenes viz.; TPn, TNn and TVn. Polarized light emitting diodes fabricated from TV12 by solution processing with the configuration of ITO/PEDOT:PSS/Polymer/Al show linearly polarized electroluminescence with a dichroic ratio of 14.32. Spun thin films of TV12 elicited a dichroic ratio of 15.02 in photoluminescence. Studies using a range of techniques such as; atomic force microscopy, grazing incidence X-ray diffraction, fluorescence anisotropy, linear dichroism, fluorescence lifetime and dynamic light scattering reveal that the presence of highly ordered self-assembly was responsible for the dimensional confinement of optoelectronic properties. The ordering in the thin films originates from vinyl groups in the side chains of the TV12 polymer. Further studies on device characteristics show higher charge carrier mobility in polymers with vinyl side chains. Solution processed PLEDs show a maximum brightness of 863 cd m(-2) for the TP12 polymer and TV12 based LEDs show a maximum brightness of 524 cd m(-2).</p>1 aAnanthakrishnan, Soundaram, Jeevarathi1 aWadgaonkar, Prakash, P.1 aSomanathan, Narayanasastri  uhttps://library.ncl.res.in/content/linearly-polarized-emission-self-assembled-microstructures-mesogenic-polythiophenes-0