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Unformatted text preview: . The CHN analysis of the catalysts indicated the presence of C and H in all samples but trace amount of N in saccharine cobalt complex. Similarly, EDX analysis showed the presence of C, N, O and Si in all samples. TEM images showed mesoporous property of the silica matrix as supported by XRD patterns. 155 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia MAT-P4 IRON, TIN AND COPPER INCORPORATED RICE HUSK SILICA: PREPARATION, CHARACTERIZATION AND ITS CATALYTIC ACTIVITY Ishraga Abdelmoniem Hassan and Farook Adam School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: [email protected] Silica extracted from rice husk ash (RHA) at room temperature has been modified by incorporation of iron, tin and copper (10 % wt. metal) via sol-gel method. The modified catalysts were denoted as RHA 10Fe, RHA-10Sn and RHA-10Cu. The catalysts were found to be amorphous and had BET specific surface 2 -1 area of ca. 301-539 m g . EDX analysis confirmed the presence of iron, tin and copper in the silica surface. The catalytic activity of these catalysts has been tested for Friedel-Crafts benzoylation of anisole (As) with benzoyl chloride (BOC). The benzoylation activity of the catalysts followed the order: RHA -10Fe > RHA-10Sn > RHA-10Cu. The RHA-10Fe showed high activity with 100 % conversion of BOC and selectivity of 4.9 and 84.1 % towards o- and p-methoxybenzophenone (o- and p-MOBP), respectively in 20 min. However, RHA-10Sn gave 100 % conversion of BOC with 4.7 and 80.7 % selectivity for o- and pMOBP in 3 h. RHA-10Cu was found to be less reactive (47.9 %, in 6 h) with only 1.9 and 56.6 % of o- and p-MOBP. MAT-P5 SYNTHESIS, CHARACTERIZATION AND LUMINESCENCE PROPERTIES OF 6,6' -DI-TERT-BUTYL-2,2'-[1,2PHENYLENEBIS(NITRILOMETHYLIDYNE)]DIPHENOL SCHIFF BASE: EXPERIMENTAL AND THEORETICAL STUDY TOWARDS APPLICATION AS ORGANIC LIGHT EMITTING DIODES Naser Eltaher Eltayeb, Siang Guan Teoh and Rohana Adnan School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.
- Spring '11