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E-mail: abr_chem@yahoo.co.in(Received November 17, 2010; Revised March 21, 2011; Accepted March 31, 2011).       MCM-41 .   XRD, FT-IR, SEM  EDS   .      malonontrile Knoevenagel 5-arylindene malononitriles   .     , ,   , ,  ,         . : (CFA),   (MCM-41), Knoevenagel ,  ABSTRACT. Coal fly ash of thermal power plants converted into mesoporous materials MCM-41. The synthesized materialwas characterized by XRD, FT-IR, SEM, and EDS techniques. The catalytic activity of prepared material was studied for thesynthesis of 5-arylindene malononitriles via Knoevenagel condensation of aromatic aldehydes and malonontrile is described.The features of present method are easy handling, stability, reusability, and eco-friendliness of catalyst, high yields, short reac-tion time, simple experimental and work up procedure.Keywords: Coal fly ash (CFA), Mesoporous silica materials (MCM-41), Knoevenagel condensation reaction, Heterogeneouscatalysis

Knoevenagel Reaction in Water Catalyzed by Mesoporous Silica Materials Synthesized from Industrial Waste Coal Fly Ash