Abstract
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.
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