A novel fluorescent probe for copper (II) ion based on rare earth polyoxometalate. Issue 10 (26th November 2022)

• Record Type: Journal Article
• Authors: Li, Na; Chen, Xiaowen; Huang, Yulan; Wang, Li; Li, Jian; Yang, Xiangxiang
• Is Part Of: Spectroscopy letters. Volume 55:Issue 10(2022)
• Page Start: 648
• Page End: 658
• Publication Date: 2022-11-26
• Subjects: Aquatic products -- copper determinatiom -- fluorescent probe -- rare earth polyoxometalate; Spectrum analysis -- Periodicals; 543.5
• DOI: 10.1080/00387010.2022.2143819
• Languages: English
• ISSNs: 0038-7010

Abstract

Abstract: A new strategy for the determination of Cu(II) ions was developed using K10 H3 [Eu(SiMo6 W5 O39 )2 ]·28H2 O. The polyoxometalate H4 SiMo6 W6 O40 acts as a ligand to sensitize the europium ion to emit red fluorescence, and the fluorescence was quenched by the addition of Cu(II) ions. The luminescence of the central Eu 3+ was quenched due to the inner filter effect (IFE) of Cu(II) to K10 H3 [Eu(SiMo6 W5 O39 )2 ]·28H2 O and the static burst. Therefore, K10 H3 [Eu(SiMo6 W5 O39 )2 ]·28H2 O can be used as a specific fluorescent probe for Cu 2+ and it exhibited a very good linear response range for copper ions from 1 to 20 μM with detection limit of 0.13 µM. The probe was successfully applied to the determination of Cu(II) ions in clam samples with recoveries in the range of 90–98%.