Composites of surface imprinting polymer capped Mn-doped ZnS quantum dots for room-temperature phosphorescence probing of 2,4,5-trichlorophenol

• Published in: Journal of luminescence 2014-11, Vol.155, p.298-304
• Main Authors: Wei, Xiao, Zhou, Zhiping, Dai, Jiangdong, Hao, Tongfan, Li, Hongji, Xu, Yeqing, Gao, Lin, Pan, Jianming, Li, Chunxiang, Yan, Yongsheng
• Format: Article
• Language: English
• Subjects: 2,4,5-Trichlorophenol; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Mn-doped ZnS quantum dots; Molecularly imprinted polymers; Nanoscale materials and structures: fabrication and characterization; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other materials; Photoluminescence; Physics; Quantum dots; Room temperature phosphorescence; Selective recognition; Specific materials
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2014.07.001

In this paper, a simple procedure for the determination of 2,4,5-trichlorophenol (2,4,5-TCP) is reported. Mn-doped ZnS quantum dots (QDs) capped by molecularly imprinted polymers (MIPs) were prepared. MIPs were characterized by spectrofluorometer, UV–vis spectrophotometer, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscope (TEM) and scanning electron microscope (SEM). Meanwhile, spectrofluorometer was used to the evaluation of optical stability, the effect of pH, and the selective and sensitive determination of 2,4,5-TCP. Under optical conditions, MIPs-capped Mn-doped ZnS QDs were successfully applied to the detection of 2,4,5-TCP in water selectively and sensitively, and a linear relationship was obtained to cover the concentration range of 5.0–50μmolL−1 with a correlation coefficient of 0.9913. Moreover, 2,4,5-TCP could quench the room temperature phosphorescence of MIPs-capped Mn-doped ZnS QDs in a concentration-dependent manner, which was best described by a Stern–Volmer-type equation. •Molecularly imprinted polymers (MIPs)-capped Mn-doped ZnS quantum dots (QDs) were prepared.•The composite materials integrated the advantages of the high selectivity of the molecular imprinting and strong RTP property of the QDs.•The composite materials was successfully applied to selectively and sensitively detect 2,4,5-TCP in water.