A carbazole-benzothiazole-based fluorescent probe embedded in paper, cellulose, and chitosan sensors for visual and rapid detection of bisulfite in food samples.
Aug 2026· Food Chemistry· Vol 526, pp.
150761
· 0 citations· 43 references
Medicine
Abstract
Bisulfite (HSO3-) is widely used as a food additive, yet its excessive residue poses potential health risks. Herein, a novel fluorescent probe TC-FV-BT was developed for the detection of HSO3-. Upon addition of HSO3-, the nucleophilic addition disrupted the π-conjugation of the probe, giving rise to a distinct fluorescence enhancement with bright orange emission. TC-FV-BT exhibited a rapid response, a low detection limit of 0.077 μM, and excellent selectivity. The sensing mechanism was confirmed by 1H NMR titration, HRMS, and DFT calculations. Furthermore, TC-FV-BT was successfully immobilized onto paper, cellulose acetate (CA), and chitosan (CS) film substrates to construct a portable visual detection platform, which was applied to the analysis of HSO3- in ten complex food matrices. Notably, the CS film-based sensor displayed superior anti-interference performance in high-oil and high-pigment samples. This work provides a versatile and practical platform for on-site rapid monitoring of HSO3- in food safety applications.
A sustainable and multifunctional fluorescent sensor based on a dansyl hydrazine-derived cellulose-modified Schiff base (DHCSB) was successfully designed and synthesized for the dual detection of 4-nitroaniline (4-NA) and Cu(II) ions in solution. Dialdehyde cellulose was first prepared and subsequently functionalized...
Hydrazine (N2H4) is a highly toxic pollutant and potential carcinogen, demanding sensitive, rapid, and field-deployable detection methods for environmental and food safety monitoring. Herein, we rationally designed a twisted intramolecular charge transfer (TICT)-based fluorescent probe PS featuring a phenothiazine scaf...
Li-Min Liang, Tao Wang, Hai Ren et al.· Spectrochimica Acta Part A -...· 0 citations
Real-time monitoring of highly toxic cyanide (CN-) using low-cost and visually detectable fluorescent probes is essential for minimizing its environmental and biological hazards. Herein, a novel benzothiazolium-based donor-π-acceptor (D-π-A) fluorescent probe (MBT) was developed for the sensitive and selective detectio...
A. Sert, Duygu Aydin, Mehmet Oguz et al.· Spectrochimica Acta Part A -...· 0 citations
A novel oxime-incorporated polydiacetylene-functionalized molecule (PCDA-OX) was synthesized for real-time, rapid, and selective detection of the organophosphate insecticide chlorpyrifos ethyl, which is widely used in agricultural fields globally. Nanocomposites containing PCDA-OX molecules were fabricated within a c...
Akm Mashud Alam, Demetrius Finley, George A. Kraus et al.· ACS Omega· 0 citations
Two new chemodosimeters (SA2-Ind and SA2-Thio) were designed and synthesised by coupling Bisthiophene carboxaldehyde fluorophore with the two different electron-withdrawing salt cores. The developed probes exhibited instantaneous, remarkable colour and fluorescence changes selectively with CN- over other anions. The nu...
S. Abirami, V. Dharaniprabha, P. Ponlakshmi et al.· Spectrochimica Acta Part A -...· 0 citations
BONR, a newly developed fluorescent probe, was prepared through the fusion of bisphenol A, dicyanoisophorone, and Rhodamine ethylenediamine. This probe enables the specific detection of Fe3+ ions, resulting in a synergistic enhancement of both its spectral properties and practical application. In an EtOH/HEPES (1:1, v/...
Yi-Han Yang, Feng-Jun Yan, Xiao-Xia Cheng et al.· Spectrochimica Acta Part A -...· 0 citations
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