Ultra-low-temperature reversible thermochromism and contactless bacterial sensing by chalcone-functionalized polydiacetylene

Abstract

Polydiacetylenes are a class of conjugated polymers exhibiting unique color and fluorescence transformations. Here, we report synthesis and remarkable chromatic properties of polymerized diacetylene displaying chalcone headgroup. Specifically, exposure of...

Biogenic amine sensors using organic π-conjugated materials as active sensing components and their commercialization potential

“…Another strategy is to induce a chemical change by designing chromophores that are reactive with BAs to change the electronic structure of the compounds, as BAs can be reactive due to their nucleophilic nature. 39,68–70…”

“…Another strategy is to induce a chemical change by designing chromophores that are reactive with BAs to change the electronic structure of the compounds, as BAs can be reactive due to their nucleophilic nature. 39,[68][69][70] In terms of commercialization potential, using colorimetric organic materials as sensing materials are appealing as they possess the ability to be rendered soluble in a range of solvents such that they can be printed on various substrates. This then translates to thin films as color changing sensors that can be mass produced by printing methods, and since these films can be printed on flexible substrates, they are ideal for integration into food packaging.…”

“…3c). 69 10,12-Tricosadiynoic acid was functionalized with a chalcone moiety. The resulting monomer was drop-cast onto filter paper from chloroform and exposed to saturated HCl vapour, after which the film was photopolymerized using UV light (254 nm).…”

Recent progress in the design of conjugated polydiacetylenes with reversible thermochromic performance: a review

“…47). 97 An amphiphilic peptide with reversible thermochromic behavior composed of 10,12-pentacosadiynoic acid and GAGAGAGY was prepared by Shao and coworkers, and a proteinic artificial thermochromic skin (PATS) was designed with the combination of peptide and silk fibroin. Moreover, the color transition of artificial skin can be realized through photothermal and magnetothermal modulation upon adding other functional units (Fig.…”

Dual nano-friction force microscopy/fluorescence microscopy imaging reveals the enhanced force sensitivity of polydiacetylene by pH and NaCl

“…Polydiacetylene (PDA) is a smart responsive material that changes its color from blue to red and emits fluorescent upon exposure to chemical 1,2 and physical stimuli 3 . It has particularly garnered attention in sensing fields such as the detection of ions 4 , mechanical force 5,6 , temperature 7,8 , volatile organic compunds 9 , and biomolecules [10][11][12][13] . Its mechanochromic principle originates from the twist of the backbone that shortens the conjugation length, which is governed by a delicate balance between the headgroup-headgroup interactions, the inter-alkyl chain interactions and the entropy.…”