Controlled synthesis, bioimaging and toxicity assessments in strong red emitting Mn²⁺ doped NaYF₄:Yb³⁺/Ho³⁺ nanophosphors

Abstract

Rare earth, Yb3+/Ho3+ doped NaYF4 nanophosphors co-doped with Mn2+ showed enhanced red emission under NIR irradiation and were successfully used for cancer cell imaging.

Near-infrared excited luminescence and in vitro imaging of HeLa cells by using Mn2+ enhanced Tb3+ and Yb3+ cooperative upconversion in NaYF4 nanocrystals

“…19 Because the energy transfer between Er 3+ and Mn 2+ is extremely efficient, as a result, singleband red upconversion emission was observed. [19][20][21] Doping with Mn 2+ ions has also been used to control the color of emission of NaYF 4 :Yb 3+ /Ho 3+ nanocrystals to achieve enhanced red emission, 22,23 and Zhang's group proposed an energy transfer mechanism from the Yb 3+ -Mn 2+ dimer to Eu 3+ . The 4 T 1 energy level of Mn 2+ matches well with the 5 D 0 energy level of Eu 3+ .…”

Upconversion Luminescent Material‐Based Inorganic‐Organic Hybrid Sensing System for the Selective Detection of Hydrazine in Environmental Samples

“…It can be prepared in one step; resorufin sodium salt was treated with propionyl chloride in the presence of triethylamine to get 80% yield of RePr ,. The OA‐capped UCNPs were prepared as per the earlier reported procedure with slight modification ,. Owing to the hydrophobic host‐guest interaction, hybrid RePr ‐UCNPs were effortlessly prepared through self‐assembly method .…”

Lanthanide Doped Near Infrared Active Upconversion Nanophosphors: Fundamental Concepts, Synthesis Strategies, and Technological Applications

“…For the intended bioimaging application the UCNP surface were functionalized with polyethylene glycol (PEG)–polyethylene imine (PEI) copolymer to make them water dispersible. These functionalized UCNP were successfully examined for the fluorescence imaging of human breast adenocarcinoma cells MDA‐MB‐231 ( Figure ) …”

“…Nanosized luminescent materials have gained substantial interest of current research community because of their commendable applications in numerous fields. Till now, several fluorescent materials such as, metal complexes, organic dyes, metal nanoparticles, fluorescent proteins, semiconductors, metal ion doped nanocrystals, polymers, metal organic frameworks (MOF), etc. have been designed and developed for diverse applications.…”