کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
744021 | 1462123 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis of triazolo-thiadiazole fluorescent organic nanoparticles as primary sensor toward Ag+ and the complex of Ag+ as secondary sensor toward cysteine Synthesis of triazolo-thiadiazole fluorescent organic nanoparticles as primary sensor toward Ag+ and the complex of Ag+ as secondary sensor toward cysteine](/preview/png/744021.png)
Fluorescent organic nanoparticles (FONs) have received considerable attention in the past few years, since the material holds great flexibility in materials synthesis and optical properties. In this study, we report a novel Ag+-selective turn-on fluorescent chemosensor based on the triazolo-thiadiazole (TTD) FONs, which show a significant fluorescence enhancement to silver ions among fourteen metal ions due to the formation of Ag–FONs cation complex, and also exhibit a lowest detectable concentration of 2.87 × 10−9 M. Upon the addition of Cysteine (Cys), a thiol-containing amino acid, the fluorescence intensity of the colloidal solution decreases significantly with a limit detection concentration of 2.58 × 10−7 M, indicating that Cys can form the Ag–Cys complex. Thus FONs are a potential primary sensor toward Ag+ and a secondary sensor toward Cys. The method is a basis for further two-component recognition study of TTD FONs. The possible mechanism is also discussed.
Journal: Sensors and Actuators B: Chemical - Volume 160, Issue 1, 15 December 2011, Pages 656–661