Fluorescence “Turn OFF-ON” detection of Fe3+ and propiconazole pesticide using blue emissive carbon dots from lemon peel
Foziya Yusuf Vadiaa, Subhadeep Ghoshb, Vaibhavkumar N. Mehtac, Sanjay Kumar Jhac, Naved I. Maleka, Tae Jung Parkb, Suresh Kumar Kailasaa d✉
- aDepartment of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395007, Gujarat, India
- bDepartment of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
- cASPEE SHAKILAM Biotechnology Institute, Navsari Agricultural University, Surat 395007, Gujarat, India
- dDepartment of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395007, Gujarat, India. Electronic address: sureshkumarchem@gmail.com
- ✉Corresponding author
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Abstract
In this study, water-soluble carbon dots (CDs) were employed as a novel fluorescence “turn OFF-ON” sensor to detect Fe 3+ ions in pharmaceutical sample and propiconazole (PC) in food samples. Blue fluorescent “LPCDs” are synthesized from the lemon peel that exhibited emission at 468 nm when excited at 378 nm. The average size of the as-prepared LPCDs is 2.03 nm, displaying a quantum yield of 32 %. Fluorescence “turn OFF-ON” strategy was developed for sensing of Fe 3+ ion and PC, demonstrating favorable linearity in the range of 0.5–180 μM and 0.1–40 μM with the detection limits of 0.18 μM and 0.054 μM for Fe 3+ and PC, respectively. Further, LPCDs-loaded cellulose paper was used as visual reader to detect Fe 3+ and PC. This approach was effectively applied to detect Fe 3+ and PC in pharmaceutical and vegetable samples.