Highly sensitive determination of 4-nitrophenol with coumarin-based fluorescent molecularly imprinted poly (ionic liquid)
Document Type
Article
Publication Date
11-5-2020
Department
Department of Chemistry
Abstract
A coumarin-based fluorescent molecularly imprinted poly (ionic liquid) (FL-MIPIL) was prepared using a new coumarin-based alkenyl fluorescent ionic liquid (coumarin-FL-IL) as the functional monomer, IL [V2C4(mim)2][(PF6)2] and ethyleneglycol dimethacrylate as the cross-linkers, and 4-NP as the template molecule. The absolute quantum yields of coumarin-FL-IL and FL-MIPIL were 7.26 % and 30.66 %, respectively. As a result of the electron transfer between coumarin-FL-IL which contains amino groups and 4-NP bearing hydroxyl groups, FL-MIPIL fluorescence was effectively quenched by 4-NP. The prepared FL-MIPIL sensor can rapidly respond to 4-NP within 60 s. The FL-MIPIL sensor had good linear response to 4-NP from 0.001–7.5 μM and low detection limit of 0.5 nM (S/N = 3). The FL-MIPIL sensor exhibited high sensitivity and good selectivity for 4-NP. The outstanding performance of FL-MIPIL could be ascribed to high fluorescence intensity of FL-MIPIL without matrixes and more interactions between FL-MIPIL and 4-NP. The FL-MIPIL sensor has successfully applied to the determination of 4-NP in lake, rain and waste water samples, river sediment, soil and urine samples.
Publication Title
Journal of Hazardous Materials
Recommended Citation
Dai, H.,
Deng, Z.,
Zeng, Y.,
Zhang, J.,
Yang, Y.,
Ma, Q.,
Hu, W.,
Guo, L.,
Li, L.,
Wan, S.,
&
Liu, H.
(2020).
Highly sensitive determination of 4-nitrophenol with coumarin-based fluorescent molecularly imprinted poly (ionic liquid).
Journal of Hazardous Materials,
398.
http://doi.org/10.1016/j.jhazmat.2020.122854
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2632
Publisher's Statement
© 2020 Elsevier B.V. Publisher’s version of record: https://doi.org/10.1016/j.jhazmat.2020.122854