Gallic acid capped Tb³⁺-doped CaF₂ nanocrystals: an efficient optical probe for the detection of carbonate and bicarbonate ions

Abstract

Detection of carbonate and bicarbonate ions in the aqueous medium is important due to their significance in diverse fields like environmental, materials and life sciences. In this work, we have...

11-Mercaptoundecanoic Acid-Functionalized Carbon Dots As a Ratiometric Optical Probe for Doxorubicin Detection

“…Optical probes have received widespread attention due to their advantages of high sensitivity, good selectivity, and fast response . Some kind of luminous material can be used to construct an optical probe, attributing to that the detection object can change the optical feature of the luminous material .…”

“…Optical probes have received widespread attention due to their advantages of high sensitivity, good selectivity, and fast response. 10 Some kind of luminous material can be used to construct an optical probe, attributing to that the detection object can change the optical feature of the luminous material. 11 So far, most of the reported optical probes were based on the single-signal output mode or single-wavelength mode to achieve the detection of target objects, resulting in poor credibility and high interference.…”

All‐Inorganic Glass Scintillators: Scintillation Mechanism, Materials, and Applications

“…The permissible f–d transition, such as 5d–4f transition in Ce 3+ and Eu 2+ , usually results in broadband emission with short decay time, and the spectra are sensitive to the crystal field. [ 63,64 ]…”

“…The permissible f-d transition, such as 5d-4f transition in Ce 3+ and Eu 2+ , usually results in broadband emission with short decay time, and the spectra are sensitive to the crystal field. [63,64] As shown in Figure 3d, due to the large bandgap of glass matrix (or the micro/nano crystals in glass), the orbit energy levels of rare earth ions are within the band gap and generate luminescent centers. If the energy level of the excited state of rare earth ions is lower than the conduction band minimum of glass matrix (or the micro/nano crystals in glass), or the ground state of rare earth ions is higher than the valence band maximum of glass matrix (or the micro/nano crystals in glass), the electrons and holes rapidly transfer to the excited state level and ground state level of the rare earth ions, respectively.…”

CO32− ion-induced Cu2+ ion determination using DPA capped-LaF3:Eu3+ nanocrystals

“…36 In another report, the same group demonstrated gallic acid-functionalized Tb 3+ -doped CaF 2 NCs to detect carbonate and bicarbonate ions. 37 Our group recently developed a technique for detecting WO 4 2− ions in an aqueous medium using 3,5-DHBA-CaF 2 :Tb 3+ NCs. Here, the Tb 3+ ion luminescence intensifies with enhancement in the concentration of WO 4 2− ions in the FRET process between the analyte and the Tb 3+ ion.…”