Magnetic nanoparticles and quantum dots co-loaded imprinted matrix for pentachlorophenol

Yang, Min; Han, Aijuan; Duan, Junling; Li, Zhipeng; Lai, Yongchao; Zhan, Jinhua

doi:10.1016/j.jhazmat.2012.07.064

Cited by 41 publications

(18 citation statements)

References 40 publications

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“…Strong absorption bands at around 3432, 2930 and 1700 cm −1 were observed, which could be attributed to the stretching vibration of C O, C H and O H in MAA [22]. Absorption bands at around 1600 and 1450 cm −1 were observed due to C C stretching vibration in benzene ring of DVB or MAA [23]. The bonds at around 1099 and 1160 cm −1 were attributed to C O stretching and O H bending vibrations [24].…”

Section: Preparation and Characterization Of Mt-mipsmentioning

confidence: 94%

Multi-template imprinted polymers for simultaneous selective solid-phase extraction of six phenolic compounds in water samples followed by determination using capillary electrophoresis

Lü

Wang

et al. 2017

Journal of Chromatography A

122

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a b s t r a c tNovel multi-template molecularly imprinted polymers (mt-MIPs) with six phenolic compounds as the template, namely phenol, 4-chlorophenol (4-CP), 2,4,6-trichlorophenol (2,4,6-TCP), 2,4-dichlorophenol (2,4-DCP), 2-chlorophenol (2-CP) and 2,6-dichlorophenol (2,6-DCP), were prepared by precipitation polymerization and used as the adsorbents of solid-phase extraction (SPE), and coupled with capillary electrophoresis (CE) for the simultaneous selective extraction, separation and determination of trace phenolic compounds in water samples. The resultant mt-MIPs exhibited uniform spherical morphology, large specific surface area and high thermal stability, and offered high selectivity towards the six template phenolic compounds. Various parameters affecting the molecularly imprinted SPE (MISPE) efficiency were investigated in detail, and excellent CE separation was realized within 7 min. Good linearity was obtained in the range of 1-200 g L −1 for phenol and 4-CP, and 1-300 g L −1 for 2,4,6-TCP, 2,4-DCP, 2-CP and 2,6-DCP. High sensitivity was attained with low limits of detection and quantification ranging from 0.17 to 0.31 g L −1 and 0.57 to 1.03 g L −1 , respectively. Satisfactory recoveries for spiked reservoir water, river water, tannery wastewater and tap water samples were achieved in the range of 82.13-105.63% with relative standard deviations within 1.68-6.96%. The developed MISPE-CE method proved practically feasible for simultaneous selective extraction/enrichment, separation and sensitive determination of multiple targets in complicated aqueous matrices.

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Section: Preparation and Characterization Of Mt-mipsmentioning

confidence: 94%

Multi-template imprinted polymers for simultaneous selective solid-phase extraction of six phenolic compounds in water samples followed by determination using capillary electrophoresis

Lü

Wang

et al. 2017

Journal of Chromatography A

122

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“…The peaks at 2989 and 2958 cm −1 indicated the presence of C-H stretching bands of both -CH 3 and -CH 2 . As seen from curve b, the disappearance of C-Cl bond stretching vibration at 732 cm −1 and C = C stretching vibration in benzene ring at 1570 and 1469 cm −1 could demonstrate the successful imprinting of 2,4,6-TCP [35,36].…”

Section: Characterization Of Mipsmentioning

confidence: 98%

Molecularly imprinted polymers for dispersive solid‐phase extraction of phenolic compounds in aqueous samples coupled with capillary electrophoresis

et al. 2016

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A simple and sensitive method for the simultaneous determination of seven phenolic compounds in aqueous samples was developed by dispersive solid-phase extraction (DSPE) coupled with capillary electrophoresis (CE), namely phenol, 4-chlorophenol (4-CP), pentachlorophenol (PCP), 2,4,6-trichlorophenol (2,4,6-TCP), 2,4-dichlorophenol (2,4-DCP), 2-chlorophenol (2-CP) and 2,6-dichlorophenol (2,6-DCP). Molecularly imprinted polymers (MIPs) prepared by precipitation polymerization with 2,4,6-trichlorophenol (2,4,6-TCP) as template were used as DSPE sorbents to selectively adsorb the phenols. Various parameters affecting the extraction efficiency were evaluated and excellent CE separation was achieved within 13.5 min by using 15 mmol/L borate buffer containing 15% (v/v) methanol at pH = 9.8. Under the optimized conditions, good linearity was obtained in the range of 2-200 g/L for phenol, 2,4-DCP and 2,6-DCP, 2-300 g/L for 4-CP and 2-CP, 1.5-150 g/L for PCP, and 2-400 g/L for 2,4,6-TCP, with the correlation coefficient (R 2 ) higher than 0.9938. Limits of detection and limits of quantification were in the range of 0.18-0.44 g/L and 0.59-1.45 g/L, respectively. The developed MIPs-DSPE-CE method was also successfully applied to determine the seven phenolic compounds in lake, tap, seawater and tannery wastewater. The average recoveries at three different spiked levels ranged from 70.75 to 106.7% with the relative standard deviations of 1.15-6.28%.

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“…The fluorescence of QDs was quenched by the analyte in a concentration‐dependent manner. When an imprinted silica matrix was co‐loaded with Fe 3 O 4 nanoparticles and QDs, bound analytes were detected and were easily separated under an external magnetic field . Proteins such as bovine serum albumin and cytochrome c were also imprinted into a silica layer of core–shell‐type CdTe QD composite particles .…”

Section: Molecularly Imprinted Polymers For Luminescent Sensing As Rementioning

confidence: 99%

Polymers for Luminescent Sensing Applications

Kim

Chang

2014

Macro Chemistry & Physics

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presence of an analyte is fi rst detected by interaction with a receptor and is then followed by the transduction of this binding event into a measurable signal. [ 2 ] Selectivity and sensitivity are the most important requirements of a sensor. The selectivity of a chemical sensor is very dependent on its receptor. To attain high selectivity, specifi c interaction between the receptor and an analyte should exist. [ 3 ] Polymers used for chemical sensing applications can be classifi ed into two categories: polymers interacting with analyte molecules in a receptor and those functioning in a transducer with generating signals. Molecularly imprinted polymers (MIPs) are an interesting class of polymers designed as artifi cial receptors. Conjugated polymers (CPs) are typical Polymers are widely used for chemical sensing applications, as a receptor or as a signal transducer. Fluorescent conjugated polymers (CPs) are extensively studied for signaling. Water-soluble CPs are particularly attractive due to their potential sensing applications in environmental and biorelated fi elds. The CPs by themselves do not provide specifi c binding sites by folding into secondary or tertiary structures. Molecularly imprinted polymers (MIPs) are artifi cial receptors fabricated using the molecular-imprinting technique. They contain in-built information about the shape and functionality of specifi c potential analytes. However, most MIPs do not have optical-signaling properties. In this article, the recent developments regarding luminescent polymeric sensors are briefl y summarized. It will be of great interest if the optical-signal properties of CPs and the selectivity of MIPs are integrated in an advanced polymeric sensor.

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Magnetic nanoparticles and quantum dots co-loaded imprinted matrix for pentachlorophenol

Cited by 41 publications

References 40 publications

Multi-template imprinted polymers for simultaneous selective solid-phase extraction of six phenolic compounds in water samples followed by determination using capillary electrophoresis

Multi-template imprinted polymers for simultaneous selective solid-phase extraction of six phenolic compounds in water samples followed by determination using capillary electrophoresis

Molecularly imprinted polymers for dispersive solid‐phase extraction of phenolic compounds in aqueous samples coupled with capillary electrophoresis

Polymers for Luminescent Sensing Applications

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