Design, Preparation, Characterization, Density Functional Theory, and HOMO‐LUMO Perspective of Fe 3 O 4 @SiO 2 ‐Pr‐NH‐IC as a New Nanomagnetic Chemosensor

ABSTRACT In this research, the Fe 3 O 4 @SiO 2 ‐Pr‐NH‐IC magnetic nanoparticles (MNPs) were synthesized based on Fe 3 O 4 nanoparticles. Initially, Fe 3 O 4 was coated with tetraethylorthosilicate (TEOS) to produce Fe 3 O 4 @SiO 2 , which was functionalized by the reaction with 3‐aminopropyl three‐methoxy silane (APTMS) to yield Fe 3 O 4 @SiO 2 ‐Pr‐NH 2 , followed by the treatment with indole‐3‐carbaldehyde (IC) to obtain Fe 3 O 4 @SiO 2 ‐Pr‐NH‐IC as target hybrid organic and inorganic material. The Fe 3 O 4 @SiO 2 ‐Pr‐NH‐IC was analyzed using photoluminescence spectroscopy. It was shown that this compound can selectively detect Al 3+ ions in aqueous media among various cations, with a limit of detection (LOD)…

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  Alzahra University