US EPA

3479969 

Journal Article 

A molecular imprinting-based multifunctional chemosensor for phthalate esters 

Gong, CB; Ou, XX; Liu, S; Jin, YL; Huang, HR; Tang, Q; Lam, MHW; Chow, CF; Tang, Q 

2017 

Yes 

Dyes and Pigments
ISSN: 0143-7208
EISSN: 1873-3743 

137 

499-506 

English 

10.1016/j.dyepig.2016.10.047 

WOS:000390182700057 

http://www.sciencedirect.com/science/article/pii/S0143720816306684
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This paper reports a molecular imprinting-based fluorescent and solvatochromic multifunctional chemosensor for phthalate esters (PAEs). The multifunctional chemosensor was fabricated through precipitation polymerization using 4-[(1E)-4-(2-hydroxyphenyl) ethenyl]-1-allylpyridinium bromide (HPEAPB) as the functional monomer and phthalamide-4,4′-dibutyl dimethyl ester (PDDB) as the mimic template. The molecular imprinting-based chemosensor shows specific affinity toward PDDB and dibutyl phthalate (DBP) in ethanol. Of note is that the molecular imprinting-based chemosensor shows turn-off fluorescent response toward PAEs in an ethanol solution with a limit of detection of 2.0 × 10−6 mol L-1 (0.7 ppm) when HPEAPB is in the protonated form (chemosensor 1), and shows solvatochromic properties, fluorescent enhancement and a colorimetric (from orange to bright yellow) response toward PAEs in an ethanol solution with a limit of detection of 4.0 × 10−5 mol L-1 by the naked eye when HPEAPB is in the deprotonated form (chemosensor 2). This multifunctional chemosensor is promising for the simple, accurate and low-cost detection of trace PAEs. 

Phthalate acid diesters; Turn-off fluorescent chemosensor; Fluorescent-enhancement chemosensor; Solvatochromism; Molecularly imprinted polymer