Perylenemonoimide-Based Colorimetric Probe with High Contrast for Naked-Eye Detection of Fluoride Ions

Abstract

Excessive fluoride ions (F − ) in drinking water are harmful to the environment and human health. However, most reported probes of F − can only detect fluorocarbons rather than aqueous F − . Herein, a colorimetric and fluorescent probe (PMI-OH) based on perylenemonoimide is designed and synthesized for the detection of aqueous F − , with high sensitivity, good selectivity, and reversibility. The F − causes deprotonation of PMI-OH, leading to a significant red shift of 222 nm (from 520 to 742 nm) of the absorption band. Upon the addition of fluorocarbons, the fluorescence intensities of PMI-OH show good linearity against the concentrations of F − , realizing the quantitative detection of fluorocarbons with a limit of detection as low as 0.495 μM. Finally, PMI-OH is applied to detect F − in drinking water. The color of PMI-OH solution shows remarkable response from pink to green when the concentrations of F − exceed the upper limit set by the World Health Organization (WHO), realizing rapid and naked-eye detection of aqueous F − .

Tumor microenvironment-activated multi-functional nanodrug with size-enlargement for enhanced cancer phototheranostics

“…34 Then, the thiol group will attack the carbon atom of the carbamate group, triggering an intramolecular cyclization and the subsequent release of NPMI and Chl. 35–37 The amine group of NPMI offers a strong electron-donating effect, while that of CPMI is attached to an electron-withdrawing group CO. As a result, NPMI has a strong intramolecular charge transfer (ICT) effect, 38 providing significant NIR fluorescence emission and a good photothermal effect (Fig. 1A).…”

“…[35][36][37] The amine group of NPMI offers a strong electron-donating effect, while that of CPMI is attached to an electron-withdrawing group CvO. As a result, NPMI has a strong intramolecular charge transfer (ICT) effect, 38 providing significant NIR fluorescence emission and a good photothermal effect (Fig. 1A).…”

Acid-triggered two-stage superlarge redshift absorption for turn-on type photothermal conversion at the first and second near-infrared window

“…A suitable NIR-absorbing wavelength, excellent extinction coefficient, and considerable photothermal conversion efficiency appear to be the main themes in designing NIR absorbers. [18][19][20][21] Beneting from continuous efforts in regulating the photophysical properties, the existing NIR absorbers are already capable of satisfying comprehensive requirements from most photothermal conversion applications. [22][23][24][25] In this case, the lack of efficient NIR photothermal conversion units is no longer the principal contradiction when investigating photothermal conversion, although there are still some innovative strategies for the structural design of NIR absorbers.…”

A ferrocene‐pyrene dyad for multiple channel sensing of F− and H2PO4−

“…Therefore, accurate detection of fluoride and phosphate anions is vital for biochemical and environmental applications. [ 10–17 ]…”

“…Therefore, accurate detection of fluoride and phosphate anions is vital for biochemical and environmental applications. [10][11][12][13][14][15][16][17] Until now, numerous analytical detection techniques have been established to detect fluoride and phosphate anions. [18][19][20][21][22] Among them, the fluorescence analysis method has received particular attention owing to its simple operation, rapidity, sensitivity, and selectivity.…”