Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 381, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.120966
Keywords
Pesticides; MOFs; Fluorescence probe candidates; Dual-emitting platform
Categories
Funding
- Young Talents Project of Northeast Agricultural University of Heilongjiang Province [18QC64]
- Natural Science Foundation of Heilongjiang [LH2019B002]
- Northeast Normal University [B3LYP/6-31G*]
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Pesticides, which can accumulate in soil, water, animals and plants, are essential to world agriculture. Developing a method that can efficiently and quickly detect toxic pesticides is of importance but still a challenge. Here, two luminescent dye@MOFs systems, Rho B@1 and Rho 6G@1, were successfully fabricated based on [Cd2(tib)(btb)(H20)2N403-2DMF (1). This work is the first use of two fluorescent sensors as dual-emitting platforms for detecting pesticides. As a result, the fluorescence intensity ratios between the two main emissions can be tuned using the concentrations of the dye solutions, and the emissions are at 370 nm/606 nm and 370 nm/590 nm for Rho B@1 and Rho 6G@1, respectively. The intensities of the two main emissions of Rho B@1 and Rho 6G@1 are also influenced by the chemical structures of pesticides with electron-withdrawing - Rho B@1 and Rho 6G@1 can still remain stable regarding the detection of nitenpyram even after 5 cycles, with LODs of 0.48 nM for Rho B@1 and 3 nM for Rho 6G@1, which indicate that these two luminescent dye@MOFs systems we excellent tittorew. probe randiclatec for the selective detection of pesticides.
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