Abstract
Meso-structured and ladder organic-inorganic hybrid materials functionalized with ammonium carbox- ylate groups were prepared. These materials were obtained by the sol-gel process starting from the cyanopropyltriethoxysilane precursor as a building block. Hydrolysis of CN to COOH groups followed by treatment with triethyl-amine gives rise to cationic exchange materials. These materials exhibit a high chelating capability towards cations and can be used for water treatment. Lead ion (Pb2+) was tested as example; and, some tests were made on the meso-structured and ladder material for further comparison in efficacy of extractions