Synthesis of fructose bound Fe() integrated carbon dots as a robust turn-off detection sensor for chlortoluron

• Published in: RSC advances 2023-06, Vol.13 (25), p.1728-1737
• Main Authors: Rani, Ali, Faiz, Muhammad, Mian, Ara, Behisht, Shah, Aftab Ali
• Format: Article
• Language: English
• Subjects: Carbon; Carbon dots; Chemistry; Diamines; Fluorescence; Fructose; Metastable state; Molecular interactions; Quenching; Robustness; Sensors; Soil water
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/d3ra01430d

A simple, sensitive, and robust fluorescent sensor for chlortoluron detection has been developed. Fluorescent carbon dots were synthesized using ethylene diamine and fructose via a hydrothermal protocol. The molecular interaction between fructose carbon dots and Fe( iii ) resulted in a fluorescent metastable state exhibiting remarkable fluorescence quenching at λ em of 454 nm and interestingly, further quenching occurred upon the addition of chlortoluron. The quenching in the fluorescence intensity of CDF-Fe( iii ) towards chlortoluron occurred in the concentration range of 0.2-5.0 μg mL −1 where the limit of detection was found to be 0.0467 μg mL −1 , the limit of quantification was 0.14 μg mL −1 , and the relative standard deviation was 0.568%. The selective and specific recognitive nature of the Fe( iii ) integrated fructose bound carbon dots towards the chlortoluron make it a suitable sensor for real sample applications. The proposed strategy was applied for the determination of chlortoluron in soil, water, and wheat samples with recoveries in the range of 95% to 104.3%. A simple, sensitive, and robust fluorescent sensor for chlortoluron detection.