A novel hybrid lanthanide metal-organic frameworks based on porphyrin for rapid detection of iron ions

• Published in: Analytica chimica acta Vol. 1319; p. 342961
• Main Authors: Liu, Jing, Zhao, Congping, Yang, Jun, Zhou, Yan, Du, Haiyang, Yang, Yi, Yang, Yan
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 29.08.2024
• Subjects: Fluorescence detection; Iron ion; Metal-organic frameworks; Iron ion; Metal-organic frameworks; Fluorescence detection
• ISSN: 0003-2670; 1873-4324; 1873-4324
• DOI: 10.1016/j.aca.2024.342961

Iron ion (Fe3+) is essential for the environment and human health. Detecting Fe3+ in water is crucial, making high-performance detection a key objective. Lanthanide metal-organic frameworks with abundant functional sites have been deemed a promising fluorescence sensor for Fe3+ detection. Currently, most metal-organic framework-based sensors for Fe3+ detection have cumbersome and time-consuming synthesis procedures and long detection times, which greatly limits their practical application. This study aims to construct a hybrid lanthanide metal-organic frameworks-based fluorescence sensor for Fe3+ detection that promises simple and rapid iron ion quantification in water. A novel hybrid lanthanide metal-organic frameworks (ECTMNs) was synthesized in one step using a solvothermal method with only 4 h. The frameworks comprise two metal ions, cerium and europium, serving as metal centers, and 4,4,4,4-(Porphine-5,10,15,20-tetrayl) tetrakis (TCPP) as an organic ligand. With the addition of Fe3+, the host-guest reaction occurred between Fe3+ and ECTMNs probe, leading to the gradual fluorescence burst of ECTMNs probe. A strong linear correlation between ECTMNs fluorescence intensity and Fe3+ concentration (1–90 μM) makes it a reliable sensor for Fe3+ monitoring with a detection limit of 0.3 μM. Moreover, the method was used to analyze real samples (tap water and river water), showing good recoveries (92–98 %) and low relative standard deviations (3.96–6.11 %), making it a promising option for rapidly detecting Fe3+. A rapid synthesis protocol for hybrid lanthanide metal-organic frameworks is proposed in this study. The obtained ECTMNs exhibits good water solubility, high stability, and specificity for Fe3+. Based on ECTMNs, an innovative fluorescence sensor is established for selectively detecting Fe3+ in water, which is a simple operation method with a low detection limit and short sensing time. It provides a novel method for accurately and rapidly detecting Fe3+ in environmental pollution and water safety monitoring. [Display omitted] •A novel one-step synthesis method was proposed for hybrid lanthanide metal-organic frameworks (ECTMNs) with only 4 h.•A facile approach for Fe3+ ions sensing by fluorescence quenching was developed.•A low detection limit of 0.3 μM, and wide linear range of 1–90 μM for Fe3+ ions were achieved.•ECTMNs was successfully applied to the detection of Fe3+ in different water samples.