A colorimetric chemosensor for fast detection of thiols based on intramolecular charge transfer

Colorimetric Ion Sensors Based on Polystyrenes Bearing Side Chain Triazole and Donor-Acceptor Chromophores

“…In contrast, the D-A chromophores in this study show a chemodocimetric anion recognition behavior due to a nucleophilic addition reaction at the dicyanoethene moieties, as evidenced by the 1 H NMR peak shift. 27,31 The CT band intensity of the TCNEadduct was reported to decrease upon the addition of CN -, F -, and I -ions. P1 indeed exhibited the same behavior.…”

Triphenylamine-based small-molecule fluorescent probes

“…19) to detect thiols. 107 Probe 80 in MeCN shows a colorimetric response with a visible color change from yellow green to colorless upon the addition of thiols. Probe 80 shows two absorption bands with one intense ICT band at 426 nm and the other a lower-energy ICT band at 710 nm.…”

Electron Donor-Acceptor Organic Polymers by “Click” Type Cycloaddition/Retroelectrocyclization Reaction

“…Upon the completion of electric poling, the second-order nonlinear optical responses of the polymer films were observed. Furthermore, all these polystyrene-based electron donor-acceptor nonconjugated polymers exhibited very specific colorimetric ion sensing behaviors [73][74][75][76]. The hard basic aniline nitrogen atoms preferred to interact with hard acidic metal ions like Fe 3+ , leading to the decrease in the charge-transfer absorption band and thereby resulting in decolorization.…”