Abstract
The detection of Fe3+ ions and acetone in aqueous solution is an important issue in human health and environmental monitoring. In this work, the novel lanthanide metal organic framework (Eu@Gd-BTC-x, x = 0.01, 0.03, 0.05 and 0.07) with excellent luminescence property and stability has been synthesized through in-situ functional Eu3+ ions to partially substitute the metal sites (Gd3+) of Gd-BTC. The luminescent detection experiment revealed that the Eu@Gd-BTC-0.03 exhibited a unique concentration quenching effect to Fe3+ and acetone in water, the results also proved the Eu@Gd-BTC-0.03 had excellent selectivity for Fe3+ among a series of metal ions in aqueous solution with a low detection limit of 6.8 × 10−6 M and high linear fit. Besides, the luminescent selective quenching mechanism of the Eu@Gd-BTC-0.03 is attributed to the energy absorption competition between the luminescence center (Eu3+) and the acetone or Fe3+ ions. Consequently, the Eu@Gd-BTC-0.03 would be employed as a potential luminescent sensor for detecting Fe3+ ions in the future.
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