A colorimetric and fluorescence “turn-on” sensor for Fe(III) ion based on imidazole-functionalized polydiacetylene

Synthesis, determination, and bio-application in cellular and biomass-bamboo imaging of natural cinnamaldehyde derivatives

“…Using the IUPAC definition of the limit of detection (LOD), an LOD of 0.323 μM was calculated using Eq. 3 σ bi / m , which was lower than the 9 μM of a PDA-Im sensor ( Shin et al, 2022 ). Fluorescence enhancement might be ascribed to a complexation of 1 ’s N atom with Fe 3+ ( Zhou et al, 2017 ).…”

“…A fluorescence sensor ( AH2 ) was developed to sense Fe 3+ in aqueous media ( Petdum et al, 2021 ), and a fluorescence chemosensor with a microscale multi-functional metal-organic framework was also used to sense Fe 3+ , as well as Al 3+ and 2-hydroxy-1-naphthaldehyde ( Kang et al, 2016 ). Interestingly, porous tetraphenylethylene-based organic polymer ( PTOP ) could response Fe 3+ (turn-off) with high selectivity and sensitivity ( Zheng et al, 2020 ), and a “turn-on” fluorescence sensor (polymer) based on imidazole-functionalized polydiacetylene has also been used to sense Fe 3+ ( Shin et al, 2022 ). Thus, the synthesis of new, simple, and efficient fluorescence compounds for the determination of Fe 3+ is of great significance.…”

Superfast structural transformation as a naked-eye detector: conversion of quasi-HKUST to Fe(BTC) for the detection of Fe(iii)

“…26 In another study, an imidazole-containing polydiacetylene chemosensor displays a blue-to-red colour change along with the turn-on of red fluorescence upon exposure to Fe( iii ) ion with a detection limit (LOD) of 9 μM. 27…”

Colorimetric and fluorimetric pH sensing using polydiacetylene embedded within PVC‐PCL nanofibers

“…The color of PDAs changes from blue to red under external factors due to changes in the conformation of the conjugated backbone. The changes upon external stimuli e. g. ions Pb 2+ [20] or Fe 3+ [21] can be followed by colorimetric and fluorimetric mode.…”