http://nopr.niscair.res.in/handle/123456789/791 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/2231 Title: Role of surfactant in the studies of solar energy conversion and storage: CTABRhodamine 6G-oxalic acid system <br/> <br/>Authors: Genwa, K R; Mahaveer <br/> <br/>Abstract: The photogalvanic effect, studied in a photogalvanic cell containing cetyltrimethylammonium bromide as surfactant, Rhodamine 6G as photosensitizer and oxalic acid as reductant, is reported. The effects of concentrations of surfactant photosensitizer and reductant, pH, diffusion length, electrode area and temperature on electrical output of the cell are reported. The observed photopotential and photoculTent are 414.0 mV and 90.0 μA, respectively. The observed conversion efficiency is 0.55 %, fill factor is 0.45 and the maximum power output of cell is 25.22 μW. The photogalvanie cell can be used for 96 minutes in the dark (the storage capacity of cell in dark). A mechanism has also been proposed for the generation of photoeurrent in photogalvanic cell. Dye-surfactant spectra have also been studied. <br/> <br/>Page(s): 91-96 Fri, 29 Dec 2006 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/889 Title: Studies on multielemental uptake of amide incorporated Amberlite IRC-50 using tracer packet techniques <br/> <br/>Authors: Maji, Samir; Basu, Sukalyan; Lahiri, Susanta <br/> <br/>Abstract: A chelating resin has been synthesized by incorporating amide group into Amberlite IRC-50, a weakly acidic polymer. Tracer packet technique has been used to study the multielemental uptake on amide incorporated Amberlite IRC-50 ion exchanger. It has been found that the resin has high adsorption affinity for Cu, Zn, Hg, Pb and Tl, and for the lanthanides Tb, Dy and Er. <br/> <br/>Page(s): 97-100 Fri, 29 Dec 2006 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/888 Title: Synthesis and characterization of AlPO₄-zeolites using alanine and glycine as templates <br/> <br/>Authors: Kumar, B V Suresh; Byrappa, K; Rai, K M Lokanatha; Devaraju, M K; Kumar, M S Vijaya; Ranganathaiah, C <br/> <br/>Abstract: Microporous AlPO₄-zeolites have been synthesized in the presence of glycine and alanine under mild hydrothermal conditions, maintaining temperature at 150ºC under autogeneous pressure. Reaction mechanism has been proposed for the crystallization process. The use of amino acids results in tremendous effects on the pore size of AlPO₄-zeolites. The cell volume and surface area are increased while the void fraction is decreased. The products have been characterized using XRD, FTIR, Positron annihilation life time techniques and BET surface area analysis. Scanning electron micrographs show the morphological and structural changes when alanine and gylcine are used as structure directing agents or templates. <br/> <br/>Page(s): 86-90 Fri, 29 Dec 2006 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/884 Title: Copper (I) complexes of 2-thiouracil <br/> <br/>Authors: Taşcıoğlu, Sülin <br/> <br/>Abstract: Copper complexes obtained from the reactions between 2-thiouracil and cupric hydroxide in different solvents have been investigated. Mononuclear or polynuclear complexes of Cu(I) have been obtained depending on the reaction conditions. Hydroxo complexes of copper(I) have been obtained at pH around 3.5. 2-Thiouracil acts as mono- or bidentate ligand in complexes. [Cu(H₂TU)₂OH], [Cu₅(H₂TU)₆(OH)₅] and [Cu₃(H₂TU)₄-(HTU)(OH)₂] have been obtained from the aqueous ethanolic, aqueous and dioxan solutions, respectively. Oligomeric structures of polynuclear complexes are suggested to be via the bridging of copper atoms through electron donating atoms of bidentate thiouracil. The complex, [Cu₃(H₂TU)₄(HTU)(OH)₂], reacts with concentrated HCl to give [Cu₃(H₂TU)₄Cl₃], in which its trinuclear structure is preserved. The properties and structure of [Cu₃(H₂TU)₄Cl₃] are different from those of [Cu(H₂TU)₂Cl], which is synthesized from cuprous chloride. Spectral, thermal, magnetic studies and elemental analyses for the complexes have been carried out. <br/> <br/>Page(s): 80-85 Fri, 29 Dec 2006 22:58:59 GMT