Electrochemiluminescence sensor based on upconversion nanoparticles and Zr-based porphyrinic metal-organic frameworks
Yuling Gao1, Hui Xiao1, Zhengang Han1
1Key Laboratory of Water Security and Water Environment Protection in Plateau Intersection (Ministry of Education), Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou, 730070, PR China.
Abstract:
In light of the critical necessity for precise detection of mercaptan in gasoline, due to its potential to induce metal corrosion and catalyst poisoning, this study investigates a novel methodology that employs resonance energy transfer (RET) between upconversion nanoparticles (UCNPs) and zirconium-based porphyrinic metal-organic frameworks (MOFs) to develop a highly sensitive and selective electrochemiluminescence (ECL) sensor. The NaYF4: Yb3+, Er3+@NaYF4@MOFs nanocomposite has been thoroughly characterized and exhibits enhanced ECL emission. This enhancement is attributed to the efficient RET between the UV-vis absorption of the Zr-based porphyrinic MOFs and the upconversion luminescence emission of the UCNPs. Upon interaction with mercaptan, the ECL signal experiences a significant decrease due to the interaction between mercaptan and Zr-based porphyrinic MOFs, leading to the quenching of the ECL signal. This phenomenon facilitates the sensitive detection of mercaptan within a linear range of 0.5 mg/L to 200 mg/L, with a low detection limit of 0.054 mg/L. The sensor demonstrates high selectivity and excellent stability, making it a promising tool for the quality control and environmental monitoring of mercaptan in gasoline.
