title: Fast response and high sensitivity europium metal organic framework fluorescent probe with chelating terpyridine sites for Fe³⁺.
abstract: Iron is one of the most important elements in the metabolic process for all living system. However, both its deficiency and excess from normal permissible limits can induce serious disorders. We synthesized a europium-based metal-organic framework (Eu-MOF), EuL(3) (L = 4'-(4-carboxyphenyl)-2,2': 6',2″-terpyridine), under hydrothermal conditions, and used it as a solid luminescence sensor for Fe(3+) ions. The robust EuL(3) shows fast response (∼ 1 min) and high sensitivity (Stern-Volmer constant K(SV) = 4.1 × 10(3) L/mol) for Fe(3+) ions in aqueous solution or biological systems due to the existence of chelating terpyridine and open channels. The simple and portable test paper based on the EuL(3) fluorescent sensor system provides a convenient and reliable detection of Fe(3+) in every day applications. This pioneering work contributes to extend the potential application of Ln-MOFs to the biological and environmental areas.
authors: State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics, and Physics, Chinese Academy of Sciences, 3888 East Nanhu Road, Changchun, Jilin 130033, PR China.
authors: Min
authors: M
authors: Zheng
authors: Huaqiao
authors: H
authors: Tan
authors: Zhigang
authors: Z
authors: Xie
authors: Ligong
authors: L
authors: Zhang
authors: Xiabin
authors: X
authors: Jing
authors: Zaicheng
authors: Z
authors: Sun
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D005063:Europium / Q000737:chemistry; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D015335:Molecular Probes / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D015335:Molecular Probes; D005063:Europium; D007501:Iron