Luminol functionalized siliceous zeolite nanoparticles as chemosensor for iron ions detection

The recognition and the sensing of cations have received considerable attention because of their important roles in biological, environmental and industrial processes. In particular, the sensing of iron has gained attention due to its widely distributed in nature and also one of the important elements in biological and environmental systems. In this research, of luminol chemosensor based on solid support has been designed for detection of metal ions. The immobilization of luminol into nanosiliceous zeolite particle is demonstrated to investigate chemosensors property for detecting metal ions. Silicieous zeolite namely silicalite in nanoparticles sized has been chosen as solid support and synthesized hydrothermally. 3-(Triethoxysilyl)-propylamine (APTES) and glutaraldehyde were used as functionalization and bridging agent to immobilize luminol with silicalite. This luminol functionalized silicalite chemosensor changes colour from red to yellow in aqueous solution containing Fe3+ ions, which could be detected by the naked-eye at ppm level concentration of Fe3+ ions. The fluorescence result for this chemosensor shows the fluorescence quenching for Fe3+ in aqueous solution at ëex= 372nm