Volume-11 ~ Issue-7 ~ July-2018

Abstract:N-ethyl-3-methyl indole was synthesized by treating ethyl iodide with 3-methyl indole in presence of sodium hydride in the solvent medium of DMF. N-ethyl-3-bromomethyl indole was prepared by reacting Nethyl- 3-methyl indole with N-bromosuccinimide and benzoyl peroxide in the solvent medium of benzene. Nethyl- 3-(N,N-diethanolamino methyl) indole was synthesized by treating N-ethyl-3-bromomethyl indole with diethanolamine in presence of potassium Carbonate and trace amount of 18-crown-6 in the solvent medium of DMSO. Polyester was synthesized by treating N-ethyl-3-(N,N-diethanol amino methyl) indole with diacid chloride monomer, 6FBC at 700c in the solvent medium of 1,2-dichloroethane.Polyurethane was synthesized by reacting the monomer, N-ethyl-3-(N,N-diethanolaminomethyl) indole with TDI in the solvent medium of toluene. All the monomer and polymers was characterized by IR, UV and NMR spectroscopy.

Keywords: N-ethyl-3-methyl indole, N-ethyl -3-bromomethyl indole, N-ethyl-3-(N,N-diethanol amino methyl)indole , Polyester , Polyurethane, Polymerization.

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Abstract: Eco friendly methods of green mediated synthesis of nanoparticles are the present research in the limb of nanotechnology. The biosynthesis of silver nanoparticles are done using dried leaves extract of Aegle marmelos L by reacting these samples with 1mM concentration of silver nitrate. Characterization are done using UV Spectroscopy, XRD, SEM, EDAX and FTIR are carried out for synthesized nanoparticles using plant sources. UV, XRD, SEM, EDAX and FTIR confirms the formation, crystal structure, size, elemental silver formation and functional group responsible for the capping and stabilization of nanoparticles. Aegle marmelos L plant source have good capabilities for synthesize silver nano particles by biological route..

Keywords: Green synthesis, Nanoparticles, A.marmelos

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Abstract: Adsorption and desorption of Pb(II) on two natural minerals (natural calcite and eggshell) were studied. The ability of the natural materials in removal of Pb(II) from aqueous solutions had been examined in a batch adsorption process with respect to several experimental conditions including initial solution pH, contact time, initial metal ion concentration, temperature and adsorbent concentration. The absorption isotherms showed that the adsorption capacity of substrates varied as follows: natural calcite>eggshell. Desorption kinetics show a complete hysteresis testify to the irreversibility of the bonds formed between Pb and the substrates. Thus, the uptake of lead was reproduced by a cation exchange model and by a surface complexation model for the mineral-aqueous solution interface............

Keywords: Eggshell; lead; natural calcite; sorption-desorption; thermodynamic.

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