A molecular imprinting-based multifunctional chemosensor for phthalate esters. (February 2017)

• Record Type: Journal Article
• Authors: Gong, Cheng-bin; Ou, Xiao-xiao; Liu, Song; Jin, Yong-lei; Huang, Hai-rong; Tang, Qian; Hon-Wah Lam, Michael; Chow, Cheuk-fai; Tang, Qian
• Is Part Of: Dyes and pigments. Volume 137(2017)
• Page Start: 499
• Page End: 506
• Publication Date: 2017-02
• Subjects: Phthalate acid diesters -- Turn-off fluorescent chemosensor -- Fluorescent-enhancement chemosensor -- Solvatochromism -- Molecularly imprinted polymer; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2016.10.047
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: 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-[(1 E )-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. Graphical abstract: Highlights: Molecular imprinting-based fluorescent and solvatochromic chemosensor was synthesized. Chemosensor 1 exhibits a turn-off fluorescent response toward phthalate esters in ethanol. Chemosensor 2 shows solvatochromic properties. Chemosensor 2 displays fluorescent-enhancing and colorimetric response toward DBP.