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  • Efficient synthesis of a fluorescent tripod detection system for pesticides by microwave-assisted click chemistry.

Efficient synthesis of a fluorescent tripod detection system for pesticides by microwave-assisted click chemistry.

Carbohydrate research (2008-11-11)
Isabelle Mallard-Favier, Philippe Blach, Francine Cazier, François Delattre
ABSTRACT

A new tripod molecule containing an aromatic core bearing three peracetylated cyclodextrins was synthesized via a microwave-assisted Huisgen 1,3-dipolar cycloaddition and was studied by fluorescence spectroscopy. The photoluminescent properties of complexation phenomena with different pesticides were evaluated in acetonitrile. Fluorescence titrations have been performed to calculate binding constants, sensitivity factors, and limit of detection of the resulting complexes. 2D NMR experiments confirmed the inclusion of pesticide in the hydrophobic cavity of the macrocycle and validated the supramolecular association responsible for the quenching of the fluorescence.

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Supelco
Pendimethalin, PESTANAL®, analytical standard
Supelco
Pendimethalin solution, 100 μg/mL in methanol, PESTANAL®, analytical standard