From Weed to Shining ‘Mystic Stars’: Value‐Added Applications of Siam Weed Derived Carbon Dots

Abstract

Herein, a common weed Chromolaena odorata (C. Odorata, Siam weed) is utilized as a precursor for synthesizing carbon dots (CO‐CDs) via a facile hydrothermal method devoid of further functionalization. CO‐CDs possess good water solubility, high photo stability, and intense blue fluorescence with a quantum yield of 2.56 %. Fluorescence of the as‐prepared carbon dots is quenched consequent to interaction with folic acid with high specificity, which enabled its service as an admirable probe for folic acid analysis. The limit of detection (LOD) of folic acid was noted to be 4.5 μM. The mechanism of fluorescence quenching is substantiated through the inner filter effect. The practical utility of the system is assured through analysis of folic acid in commercial samples, with an average range of 90–102 % recovery. Additionally, CO‐CDs are also established to be excellent radical scavengers.

Aggregation-Induced White Light Emission and Solvent-Induced Dual Mode Multi-Analyte Sensing by Highly Crystalline Single Component Derived N, S Co-Doped Carbon Nanodots

“…It is challenging to determine which of these effects has an impact on BCNDs or FA from the existing spectral data. Additionally, the TCSPC measurements of BCNDs in the absence and presence of FA (1 mM) were performed in order to further explore the impact of FRET 65 (Figure 9c). The minimal change in the lifetime values, which were 4.08 and 4.03 ns, respectively, for BCND and BCND−FA systems, obviously excludes FRET from FA to BCNDs.…”