An inner-filter-effect based ratiometric fluorescent sensor for the detection of uranyl ions in real samples

Abstract

In this work, a ratiometric fluorescence system was designed for detection of trace UO22+ in water based on inner filter effect (IFE) between gold nanoparticles (AuNPs) and gold nanoclusters (AuNCs)....

A smart nanopaper sensor for optical diagnosis ofHelicobacter pyloriinfection

“…The IFE phenomenon refers to the absorption of the excitation and/or emission light of a fluorophore using an appropriate absorber, which results in the fluorescence quenching of the fluorophore due to the spectral overlap between the absorption (excitation) and/or emission bands of the fluorophore with the absorption band of the absorber. 53–56 In this work, as shown in Fig. 3B, the photoluminescence (PL) of the developed sensor is dynamically quenched in the pH range of 4.5 to 1.5 as a result of the relative overlap between the different absorption spectra of RCAs and the PL spectrum of UCNPs in the spectral region of 510–560 nm.…”

The construction of dual-emissive ratiometric fluorescent probes based on fluorescent nanoparticles for the detection of metal ions and small molecules

“…Since then, based on the target-induced aggregation of AuNPs, many DRFPs have been constructed for the detection of UO 2 2+ (ref. 288) and pesticides. 289–291…”

Interpenetrating porous photonic crystal balls for rapid naked eye detection of uranyl ions

“…Over the past few decades, human activities such as uranium mining and processing, mismanagement of nuclear waste, nuclear safety incidents, and the production and use of phosphate fertilizers have resulted in the release of large amounts of uranium into the natural environment. [1][2][3] The chemical toxicity and radiotoxicity of uranium can lead to irreversible DNA damage, destruction of biomolecules, and even kidney and urinary disorders. Uranium in compounds has various oxidation states; the most stable and common in nature is the uranyl ion (UO 2 2+ ), which is easily accumulated in organisms.…”

“…Although the methods mentioned above have their distinct advantages, most of them require expensive instruments and professional operators, which has prompted some researchers to focus on convenient field-operable fluorescence chromogenic and complexometric titration techniques. [14][15][16][17][18] However, the added fluorescent and dye chromogenic substances have poor chemical stability and are photobleachable. Therefore, there is an urgent need to develop a portable, low-cost, photobleaching-resistant and easy-to-operate method to visually detect UO 2 2+ in waste water.…”