1,8-Naphthalimide-based dual-response fluorescent probe for highly discriminating detection of cys and H2S

Synthesis and Solvent Dependent Fluorescence of Some Piperidine-Substituted Naphthalimide Derivatives and Consequences for Water Sensing

“…We correlated the microscopic solvent parameter E T (30) [54], which is utilized to describe the solvent effect on the spectral shifts, with quantum yield of naphthalimide derivatives. The evolution of the quantum yield of naphthalimides versus the solvent polarity parameter E T (30) is illustrated in Supplementary Figures S6 and S7. The quantum yield follows a decreasing trend when the solvent polarity increases.…”

“…This specific behavior of the quantum yield suggests that the fluorescence mechanism is influenced by the solvent polarity, and a modification of the nonradiative decay rate can determine a significant decrease of the quantum yield values. The dependence of the radiative and nonradiative decay rates as a function of solvent polarity parameter E T (30) is given in Supplementary Figures S8-S10 for the two naphthalimides. As can be seen, an increase of the solvent polarity determines a progressive decrease of the k r for the two naphthalimides, whereas an opposite trend is observed for k nr .…”

“…The hydrogen-bond donor solvents can give hydrogen bonds to the carbonylic oxygens of the naphthalimide. For a better approach of the solvatochromism of naphthalimides, the microscopic solvent polarity, E T (30), which takes into account the polarity and acidity of solvent [54], was applied. The correlation between E T (30) and ∆ν does not obey a linear dependence, practically the solvents are placed in two distinct groups for the two samples (Supplementary Figures S13 and S14), suggesting two excited states in the photophysics of these derivatives [33].…”

“…For a better approach of the solvatochromism of naphthalimides, the microscopic solvent polarity, E T (30), which takes into account the polarity and acidity of solvent [54], was applied. The correlation between E T (30) and ∆ν does not obey a linear dependence, practically the solvents are placed in two distinct groups for the two samples (Supplementary Figures S13 and S14), suggesting two excited states in the photophysics of these derivatives [33]. The failure of the Lippert-Mataga correlation and of the E T (30) scale to describe the solvent dependence indicates that the hydrogen bonds can be responsible for the solvent shifts of ν a , ν f , or ∆ν of 7 and 8.…”

A Highly Selective and Sensitive Colorimetric Chemosensor for the Detection of Hydrogen Sulfide: A Real‐time Application in Multiple platforms

“…In recent years, with the ongoing efforts of research groups, various methods have been developed to detect H 2 S. For example, electrochemical assays (10–14), chromatography (15–17), metal‐induced sulfide precipitation (18) and optical probes are the main techniques to detect H 2 S. Among these methods, optical detection has received significant attention in recent years owing to its simplicity, high sensitivity and selectivity, and good repeatability (19–38). Chemodosimeter is the most common optical approach in which the chemical probe is incorporated with an H 2 S selective irreversible responsive unit and optical response modulator.…”