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- W2524347064 abstract "Abstract Highly luminescent and stable against photobleaching for a long period, Eu 3+ complexes labelled polymer nanoparticles with a quantum yield of 78% are presented. Europium complexes are prepared by chelating Eu 3+ with 4,4,4-trifluoro-1-(2-Thienyl)-1,3-butanedione (TTA) and trioctylphosphine (TOP). Poly(St- co -DVB- co -NaSS- co -MAA) (St = styrene; DVB = divinylbenzene; NaSS; 4-styrenesulfonic acid sodium salt hydrate; MAA = methacrylic acid) with a diameter of 77 nm are modified with Eu(TTA) 3 (TOP) 3 . Scanning electron microscopy (SEM) results shows that Eu(TTA) 3 (TOP) 3 modified Poly(St- co -DVB- co -NaSS- co -MAA) is monodispersed with a diameter of 83 nm. The intensity fractions of 5 D 0 → 7 F 2 – 5 D 0 → 7 F 1 of EuNPs defines that Eu 3+ could be existed as a more polarized structural states and comparatively stronger hypersensitive performance at 5 D 0 → 7 F 2 transition. The results show that the role of MAA in this system is important to maintain the continuous polarization of Eu 3+ ions against photobleaching because carboxylic group from MAA protects the dissociation of the symmetry around the Eu 3+ ions due to the influence of pH or external light source. The cell viability of PC 12 cells shows that in the range of 10–100 μg/mL concentrations is more than 70%. Thus, EuNPs show relatively low cytotoxicity in the concentration range of" @default.
- W2524347064 created "2016-10-07" @default.
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- W2524347064 date "2016-12-01" @default.
- W2524347064 modified "2023-09-27" @default.
- W2524347064 title "Highly luminescent and long-term anti-photobleaching Eu(TTA) 3 (TOP) 3 conjugated poly(St- co -DVB- co -NaSS- co -MAA) nanoparticles" @default.
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- W2524347064 doi "https://doi.org/10.1016/j.colsurfa.2016.09.084" @default.
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