New polymerizable luminescence probe for detection of Chlorfenvinphos and Dichlorvos pesticides

作者：Azab Hassn A; Orabi Adel S; Abbas Abbas M^*

来源：Journal of Luminescence, 2015, 167: 360-370.

DOI：10.1016/j.jlumin.2015.06.049

• Terbium probe
• Fluorescence quenching
• Binding constant
• Pesticides
• Chlorfenvinphos and Dichlorvos

Luminescence quenching probe ratio Tb(III):(L) in 1:3 stoichiometric has been studied in methanol in the bearing of the pesticides Chlorfenvinphos and Dichlorvos. The luminescence intensity of Tb(III)-(L)(3) probe decreases as the concentrations of the pesticide increases. Direct methods for the determination of the pesticides under investigation have been developed using the luminescence quenching of Tb(III)-(L)(3) probe in the solution. The detection limits were 1.9 and 1.96 mu M for Chlorfenvinphos and Dichlorvos, respectively. Stern-Volmer studies at different temperatures, indicating that collisional quenching dominates for the pesticides. The binding constants (K) and thermodynamic parameters (Delta S degrees, Delta H degrees and Delta G degrees) of the interaction of pesticides with the complex were evaluated. A polymer containing Tb(III)-(L)(3) complex and the polymerizable ligand (L; as monomer) was prepared. The polymer was characterized using EDAX, FT-IR and thermal analysis (TGA and DTA). The interaction of the polymer with Chlorfenvinphos and Dichlorvos was investigated, which gave different behavior from Tb(III)-(L)(3) complex with limit of detection of 0.43 and 0.32 mu M for pesticides Chlorfenvinphos and Dichlorvos, respectively.

• 出版日期2015-11