Eu(III) modifies the properties of poly(N-isopropylacrylamide)

AIE-Active Fluorescent Nonconjugated Polymer Dots for Dual-Alternating-Color Live Cell Imaging

“…Besides, the strong narrow-band luminescence at 615 nm could be interpreted as the characteristic emission of the PNIPAM-Eu(III) complex outside the Pdots. 35 In fact, the Pdots showed two characteristic red emission peaks at 590 and 615 nm (Figure 4b), corresponding to the electronic transitions of 5 D 0 → 7 F 1 and 5 D 0 → 7 F 2 of Eu(III) ions. 40 Comparing between the two peaks, the most prominent peak at 615 nm ( 5 D 0 → 7 F 2 ) is responsible for the red color emitted by TPE-tetraPNIPAM-Eu(III) Pdots.…”

“…The results showed that Eu(III) was coordinated by oxygen and nitrogen atoms of the amide group, which caused the decrease in electron density of the O and N atoms as well as the increase for Eu(III). 35 To further indicate the Eu(III) complexation process, EDS comparison of TPE-tetraPNIPAM and TPE-tetraPNIPAM-Eu(III) Pdots had been performed in Figure 2. The percentage of the corresponding elements was listed in Table 2.…”

“…The temperature-sensitive TPE-PNIPAM showed the fluorescence increasing effect on the aggregation state, which was beneficial for image applications in live cells. 35 Moreover, it is well-known that PNIPAM can coordinate with Eu(III) due to the carbonyl group in polymer chains. The PNIPAM-Eu(III) complex has both the character-istic red fluorescence of Eu(III) and the temperature-sensitive property of PNIPAM.…”

“…Recently, two kinds of novel tetraphenylethylene (TPE)-based radical initiators, TPE-BMP and TPE-AZO, were synthesized in our previous work. , After the initiation of vinyl polymerization by TPE-BMP and TPE-AZO, all kinds of TPE-based polymers with specific properties were successfully prepared via a simple method. The temperature-sensitive TPE-PNIPAM showed the fluorescence increasing effect on the aggregation state, which was beneficial for image applications in live cells . Moreover, it is well-known that PNIPAM can coordinate with Eu­(III) due to the carbonyl group in polymer chains.…”

Synthesis of luminescent polycarbonate grafted with methyl methacrylate/europium complex using supercritical CO2 technology as a green chemistry method

“…The dispersion of the complex on the polymeric matrix is the more simple method of doping. Several studies on this subject have shown the doping of polymers with europium complex exploring interesting methods, such as physical mixture or doping in solution by casting or polymerization process [5][6][7][8]. Studies that describe the use of supercritical fluids as an efficient method for preparation of luminescent polymers have been hardly reported [9].…”