Mesoporous MCM-41 materials containing aluminum with different Si/Al ratios (20, 40, and 80) were synthesized under hydrothermal condition. The materials were characterized using X-ray diffraction (XRD), nitrogen adsorption, Fourier-transform infrared (FTIR), scanning electron microscopy (SEM), energy-dispersive x-ray (EDX), transmission electron microscopy (TEM), and NH3 temperature programmed desorption (TPD) techniques. Incorporation of aluminum into MCM-41-type silica leads to creation of active and selective catalysts for condensation of pyrrole with 4-hydroxybenzaldehyde. The reaction was carried out at room temperature whilst stirring at 500 rpm. The catalyst Al-MCM-41 with Si/Al ratio of 20 produced a very high yield of [(pyrrole-2,5-diyl)-co-(benzylidene)]. The catalyst could be easily separated from the polymer product and regenerated by calcination.
Research on Chemical Intermediates – Springer Journals
Published: Jul 14, 2014
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