A novel hydroxyl-containing polyimide as a colorimetric and ratiometric chemosensor for the reversible detection of fluoride ions

Abstract

A novel hydroxyl-containing polyimide film has been designed and fabricated as a chemosensor for the real-time visualization of F− with high selectivity and sensitivity.

Optimizing the self‐assembly of conjugated polymers and small molecules through structurally programmed non‐covalent control

“…86,87 In 2019, Wu et al reported a novel polyimide fluoride sensor and extractor based on hydrogen bonding interactions. 88 Their polymer (Figure 5) featured two hydroxyl groups capable of hydrogen bonding with fluoride ions in solution to produce quantitative changes in absorbance in a linear fashion with respect to concentration of fluoride ion. Fluoride ions were the only anionic species out of 11 that produced this response.…”

“…Left: Polyimide fluoride sensor developed by Wu and coworkers and its colorimetric response to fluoride ion. Reproduced with permission 88 . Copyright 2019, Wiley‐VCH.…”

IDTI Dyes for Fluoride Anion Chemosensors

“…They reported that the resulting polymer cannot only be used for the detection of F − but also the extraction of F − from the organic solution. Later, Wu et al (2019) designed a dye containing hydroxyl to detect F − in dimethyl sulfoxide (DMSO); this approach exhibited a detection limit of as low as 1.79 µM. Deng et al (2020) reported aminobenzodifuranone Graphical Abstract | The new dye, IDTI, firslty used as a fluoride anion chemosensor, has a high sensitivity with the fluoride anion detection limit of as low as 1 × 10 −7 M. And the IDTI solutions have the interesting color changing properties, once meet the fluoride anion, from red to yellow under ambient light and from purple to green under UV light were detectable by the naked eye.…”

Synthesis and gas permeation properties of thermally rearranged poly(ether-benzoxazole)s with low rearrangement temperatures

“…Among polyimides, hydroxyl-containing polyimides (HPIs), as reactive polymers, can be further functionalized to prepare photosensitive polyimides, organic-inorganic polyimide composites, and thermo-crosslinkable polyimides, which are expected to be applied in optical lms, electronic packaging, liquid crystal displays, photoelectric functional devices, gas separation membranes and other elds. [11][12][13][14] In recent years, HPI, as the precursor of thermally rearranged (TR) polymers, has been widely concerned and investigated. 15 Aer thermal rearrangement reaction in solid state at 350-450 C, the benzoxazole structure from HPI was formed, accompanied by the emission of CO 2 .…”