Microporous lanthanide-organic frameworks (LOFs) was constructed by adapting the coordination sites of mixed lanthanide ions with enzene-1,3,5-tricarboxylic acid (Btc). Resonance energy transfer from Btc to lanthanide ions and energy allocation between lanthanide ions are modulated by the host-guest interactions between LOFs and aqueous pesticides. Our results indicate rigid LOFs are highly stable in relevant aqueous environment condition, and have the capacity to differentiate aqueous pesticides with unique emission intensity ratio. The effect of parameters including LOFs particle size, crystal phase orientation, solution pH on the pesticide detection limit have been examined. In addition, we have shown that by adopting a mixed linker approach using L-aspartic acid (L-Asp) and Btc, Ln-Btc<sub>x</sub>L-Asp<sub>1-x </sub>chiral sensor has been ability to distinguish chiral pesticides in aqueous medium. Compared with the traditional HPLC method for the detection of aqueous pesticides, our method provides an cost-effective alternative for practical applications in the fied.

Luminescent lanthanide-organic framework sensor as a platform for detection of aqueous pesticides

254th National Meeting (2017)

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