A susceptible multifunctional fluorescent probe based on levulinic acid for the practical detection of SO₂

Abstract

Sulfites (HSO3-) are used as preservatives and additives in many foods and medicines. However, high sulfites can cause asthma attacks and even breathing difficulties. Sulfites can also be enriched in...

An endoplasmic reticulum-targeted fluorescent probe for ratiometric tracking of endogenous SO2 derivatives

“…14,15 In particular, ratiometric fluorescence probes can efficiently eliminate the interferences derived from instruments, conditions and experimental operations, which ensures the precise detection of HSO 3 − /SO 3 2− . 16–19 Recently, the design mechanisms for functional fluorescent probes have been mainly based on intramolecular charge transfer (ICT), 20–23 through-bond energy transfer (TBET), 24,25 Förster resonance energy transfer (FRET), 26,27 photo-induced electron transfer (PET) 28,29 and excited-state intramolecular proton transfer (ESIPT). 30,31 Although FRET-based ratiometric probes with various superiorities such as large Stokes shift, and facile design and synthesis were developed, 32–36 ER-targeted FRET-based probes for the monitoring of HSO 3 − /SO 3 2− are rarely developed (Table S1, ESI†).…”

A near-infrared fluorescent probe for in situ imaging of SO2 flux in drug-induced liver injury

“…However, there is still a shortage of fluorescent probes suitable for the simultaneous detection of SO 2 in food and biological samples. [21][22][23][24][25] Due to the limitation of its short wavelength (especially those with emission above 750 nm), weak tissue penetration and high fluorescence background signal, it is not generally applicable to the actual sample detection. 26,27 Therefore, there is an urgent need to design a novel fluorescent probe with simple synthesis, high selectivity and sensitivity, and a long emission wavelength for the monitoring of SO 2 and its derivatives in organisms and food.…”