Utmmy the mechanism of the generation of protonic

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Unformatted text preview: hing band around 3600 cm was strengthened by heating in the presence of hydrogen. Similar phenomenon was observed when ammonia was adsorbed on the catalyst. Thus, based on the IR spectral changes, the changes in the structure of acid sites are proposed. 1 MAT-P15 THE PREPARATION, CHARACTERIZATION AND CATALYTIC ACTIVITY OF AZACALIX[4]ARENES INCORPORATED ONTO RICE HUSK ASH SILICA Sek Kei Lin, Farook Adam and Kasim Mohammed Hello School of chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: karen12345678@hotmail.com Azacalix[4]arene crown compound 1 was synthesized from melamine and 1,4bis(chloromethly)benzene. This azacalix[4]arene was then immobilized onto rice husk ash (RHA) silica via 3-aminopropyltriethoxysilane (APTES) to form a heterogeneous catalyst 2. The crown compound 1 was 1 13 characterized using FTIR, H and C NMR, SEM/EDX, TGA and TEM. In the FTIR spectra of compound 1, -1 -1 the band at 3397 and 3308 cm were assigned to the N–H. The band at 1640 cm was assigned to the -1 1 C=N vibration and the band at 3126 cm was assigned to the aromatic C=C bond. The H NMR spectrum showed the NH triplet chemical shifts centered at 1.3 ppm and the aromatic hydrogen was seen at 7.5 ppm. The catalytic activity of the immobilized complex 2 will be discussed. NH N H2N N N NH N N N NH2 O NH Si N NH N N N NH2 SiO2 O O NH N N NH NH NH NH Compound 1 Compound 2 161 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia MAT-P16 IRON AMINO PYRIDINE COMPLEX HETEROGENIZED ON MESOPOROUS SILICA Chien Wen Kueh, Farook Adam and Kasim Mohammed Hello School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: kuehchienwen@hotmail.com 2-amino pyridine was immobilized onto rice husk ash (RHA) silica via the substitution of the Cl via the C – Cl bond from the 3-chloropropyltriethoxysilane (CPTES) moiety. The material exhibited a BET surface 2 −1 area of 373 m g with a narrow pore diameter of 3.57 nm. Elemental analysis of confirmed the presence of N (6.48 %) which showed the successful immobilization. After the complexation with iron nitrate, pyridine FT-IR adsorption study, the presenc...
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