A novel luminescent dual-ligands europium(III) complex prepared for acetaldehyde sensitive detection

• Published in: Sensors and actuators. B, Chemical Vol. 306; p. 127542
• Main Authors: Li, Wen-Kui, Ding, Yu-Zhu, Feng, Jun-Tao, Ma, Zhi-Qing
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.03.2020; Elsevier Science Ltd
• Subjects: Acetaldehyde; Alcoholic beverages; Chemical properties; Chemical sensors; Chemoreceptors; Chemosensor; Coordination compounds; Eu(III)-complex; Europium; Fluorescence; Ligands; Linearity; Organic chemistry; Photoelectricity; Quantitative detection; Selectivity; Terephthalic acid; Chemosensor; Alcoholic beverages; Quantitative detection; Eu(III)-complex; Acetaldehyde
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/j.snb.2019.127542

[Display omitted] •A dual-ligands of terephthalic acid and methylimidazole co-coordinated Eu(III) complex was prepared.•Fluorescence intensity of the complex can be selectively and sensitively tuned by acetaldehyde.•Fluorescence quenching was associated with inner filter effect and the influence on complex structure.•Eu-complex was explored as a selective and sensitive chemosensor for acetaldehyde quantitative detection.•The application potential of the method was evaluated by detection of acetaldehyde from alcoholic beverages. A dual-ligands of terephthalic acid (TPA) and methylimidazole (MIM) co-coordinated Eu(III) complex was designed and constructed based on a simple, low-cost, feasible and effective one-pot hydrothermal strategy. The luminescent inorganic-organic complex integrated the advantages of functional ligands and photoelectric unit of Eu(III), exhibited superior physical-chemical properties. Noteworthily, its fluorescence emission can be selectively and sensitively tuned by acetaldehyde. The reason might be associated with the inner filter effect (IFE) and the influence on complex coordination structure. The complex was further explored as a superior chemosensor for acetaldehyde quantitative detection, and the established sensing detection method exhibited desirable linearity, precision, accuracy, sensitivity, selectivity, and comparable detection limit, which was further employed for acetaldehyde detection from 9 batches of alcoholic beverages and obtained satisfactory results. The novel Eu-complex based analytical method has great application potentials for acetaldehyde sensitive detection from real samples.