Antibacterial Nanoparticles with Natural Photosensitizers Extracted from Spinach Leaves
Pavel Ludačka, Pavel Kubát, Zuzana Bosáková, Jiří Mosinger
Abstract
), which was directly monitored by NIR luminescence measurements and indirectly verified using a chemical trap. The photoactivity of NPs was triggered by visible light, with enhanced red absorption by Chls. To reduce the quenching effect of carotenoids (β-carotene, lutein, etc.) in the Chl extract, diluted and/or preirradiated samples, in which the photo-oxidized carotenoids lose their quenching effect, were used for preparation of the NPs. For enhanced photo-oxidation and antibacterial effects, a sulfonated polystyrene matrix was used for preparation of a stable dispersion of sulfonated NPs, with the quenching effect of carotenoids being suppressed.
Topics & Concepts
PolystyreneSinglet oxygenQuenching (fluorescence)Antibacterial activityChemistryNanoparticlePhotochemistryNuclear chemistrySpinachReagentExtraction (chemistry)SolventCarotenoidMaterials scienceFluorescenceChromatographyOrganic chemistryOxygenNanotechnologyBacteriaPolymerBiochemistryGeneticsQuantum mechanicsPhysicsBiologyPhotodynamic Therapy Research StudiesEssential Oils and Antimicrobial ActivityTiO2 Photocatalysis and Solar Cells