Thymine-covalently decorated, AIEE-type conjugated polymer as fluorescence turn-on probe for aqueous Hg2+

Dimedone‐decorated conjugated polymer: Tandem knoevenagel‐michael post‐modification synthesis and its application as optical probe for Hg2+ and ClO− in high‐water‐fraction mediums

“…(b)] of CP1 and CP2 were recorded in THF. The absorption maxima of CP1 and CP2 peak at ∼ 374 and ∼ 385 nm, respectively, which stem from the π‐π* transition of polymer backbones . More obvious difference can be detected in the PL spectra of these two polymers.…”

Diphenylphosphoryl‐Triazole‐Tethered, AIEE‐Type Conjugated Polymer as Optical Probe for Silver Ion in Relatively High‐Water‐Fraction Medium

“…This absorption signal became indiscernible in the spectrum of P3 . Besides this, the intensity of absorption signal at ≈ 3300 cm −1 , which is the typical sign of C H group in P2 , [ 29,31,32 ] decreased signifi cantly in the spectrum of P3 . These fi ndings indicate the appreciable consumption of C H group in the following click postpolymerization.…”

“…Alterations of PL spectra can be clearly observed with the increase of water fraction, that is, the general tendency of increase at ≈ 500 nm and decrease at ≈ 420 nm, suggesting the energy transfer from high-energy fl uorene-carbazole band to relatively low-energy fl uorene-TPE segment. [ 29,38,39 ] The emission intensity in THF/H 2 O = 1:9 is ≈ 4.2-folds higher than that in pure THF; this is a typical refl ection of AIEE effect. Since water is nonsolvent for P3 , the changes of P3 's fl uorescence intensity can be assigned to the formation of intermolecular aggregate between polymer chains in solvent mixtures with high water contents, thus activating AIEE effect by restricting intramolecular rotation of TPE and blocking its nonradiative pathways.…”

“…Emission of P3 peaks at ≈420 nm in pure THF, which can be assigned to the emission of fl uorene-carbazole conjugated segments. Another emission band at ≈ 500 nm, which origins from the emission of fl uorene-TPE segments, [ 29,38,39 ] appears when the water faction ratio exceeds 10% in mixing solvents. Alterations of PL spectra can be clearly observed with the increase of water fraction, that is, the general tendency of increase at ≈ 500 nm and decrease at ≈ 420 nm, suggesting the energy transfer from high-energy fl uorene-carbazole band to relatively low-energy fl uorene-TPE segment.…”

Fluorene‐containing tetraphenylethylene molecules as lasing materials

“…Water‐soluble variants of these polymers were used for DCFR quantification of heparin . A thymidine‐functionalized AIE‐active TPE‐fluorene‐carbazole copolymer has been applied as the fluorescence turn‐on probe for aqueous Hg 2+ solutions . The combination of TPE and triphenylamine (TPA) units led to the design of AIE‐active oligomers with good hole‐transporting properties and high PLQY, indicating their future role in the design of gain media for electrically pumped lasers …”