A polylysine-based fluorescent probe for sulfite anion detection in aqueous media via analyte-induced charge generation and complexation

An effective ICT-based and ratiometric fluorescent probe for sensing sulfite

“…The formyl group acts as an acceptor while the benzimidazole moiety acts as an electron donor, to form push-pull system 16 and reduce ICT process on [52]. However, ZSO reacted with sulfite to produce the adduct in which electron-withdrawing group disappeared, and induce ICT process off (Scheme 3).…”

“…However, sulfite is a double-edged sword. When the amount of sulfite is abnormal in the human body (the acceptable daily intake is strictly regulated as 0.7 mg kg −1 of body weight) [14][15][16], it is probable to cause serious diseases, including difficulty in breathing, wheezing, hives and gastrointestinal distress [8]. Therefore, the levels of sulfite or sulphur dioxide in food and medicine are strictly limited in a number of countries.…”

A novel ratiometric fluorescent probe through aggregation-induced emission and analyte-induced excimer dissociation

“…Overdose or inhalation of sulfite may induce many respiratory responses and a number of diseases including lung cancer. For the probe herein, we choose aldehyde as the triggering moiety, which can selectively react with sulfite, and the reaction can result in the formation of the negatively charged sulfonate group [49][50][51][52][53][54] and thereby realize the ratiometric sensing of sulfite.…”

A fast‐responsive fluorescent probe for sulfite and its bioimaging

“…As an alternative, the fluorescence method has received much attention due its the advantages of convenience, high sensitivity, fast response and ease of live-cell imaging (14)(15)(16). Fluorescent probes for SO 3 2-have been mainly based on the addition to an aldehyde moiety or a nucleophilic addition (17)(18)(19)(20)(21)(22)(23)(24)(25), and levulinate cleavage mediated by SO 3 2- (26)(27)(28)(29)(30)(31)(32)(33)(34)(35). However, these probes suffer from low selectivity in the presence of biothiols such as cysteine, homocysteine, glutathione and a relatively long reaction time, which are not suitable for detecting or imaging SO 3 2-in living cells.…”