A long-persistent phosphorescent chemosensor for the detection of TNP based on CaTiO₃:Pr³⁺@SiO₂ photoluminescence materials

Abstract

An effective and facile phosphorescence sensing approach was developed for 2,4,6-trinitrophenol (TNP) detection using CaTiO3:Pr3+@SiO2 photoluminescence materials.

An ionophore-based persistent luminescent ‘Glow Sensor’ for sodium detection

“…This concept has been demonstrated with quantum dots [17][18][19] and has been extended to carbon dots. 20 Signal interference from biological autouorescence and light scattering has been addressed in other classes of sensors [21][22][23][24][25] and in imaging techniques [26][27][28][29] by using phosphorescent materials for signal transduction. Fluorescent indicators and background autouorescence in biological samples have emission lifetimes in the range of 10 À9 to 10 À7 s, 30 while phosphorescent indicators have longer emission lifetimes, ranging anywhere from microseconds to many hours.…”

“…32 In 2011, Wu et al developed an assay for a-fetoprotein based on the modulation of Fluorescence Resonance Energy Transfer (FRET) between persistent luminescence particles and gold nanoparticle conjugates. 33 Since then, persistent luminescence particles have been used as reporters in lateral ow assays, 34 in immunoassays, 35 for tumor imaging 26 and therapy, 36,37 and in sensors for select analytes such as ascorbic acid, 21 avidin, 22 2,4,6-DNA molecular hybrids, 23 TNP, 25 and cyanide 24 through a variety of mechanisms.…”