Abstract
Novel highly luminescent gels based on carboxylated nanocellulose as gelator and Ru(bpy)2(a-bpy)](PF6)2 as the luminophore and sensitizer is reported. The resulting gel exhibits a significant enhancement of its photoluminescence (PL) as well as a strong sensing response towards silver nanoparticles (AgNPs). The electrostatically interaction of the cationic amine groups of the luminophore and the carboxylic anions of the gelator can greatly amplify the sensing signal and specificity towards AgNPs. A simple procedure to determine AgNPs in a wide variety of matrices is developed, with a broad response range of 1.85×10−5 to 1.48×10−4moll−1 and detection limit (LOD) of 1.11×10−5moll−1. The proposed analytical method was successfully applied in deodorant and socks with antimicrobial activity. It is worthy to mention that the proposed methodology belongs to the “Third Way” of Analytical Nanoscience and Nanotechnology (AN&N).
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