Thermosensitive molecularly imprinted polymers on porous carriers: Preparation, characterization and properties as novel adsorbents for bisphenol A

Dong, Ruichen; Li, Jinhua; Xiong, Hua; Lü, Wenhui; Peng, Hailong; Chen, Lingxin

doi:10.1016/j.talanta.2014.06.055

Cited by 63 publications

(21 citation statements)

References 32 publications

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“…Method performance of this developed WC-TMMIPs packed SPE method toward BPA in aqueous media was compared with that of some reported MIPs based methods [13,23,[34][35][36][37][38][39][40][41], as listed in Table S2. As seen from the table, this present method demonstrates higher sensitivity and higher adsorption capacity in aqueous solutions than that reported [13,23,36,37,39,41]. Two kinds of MIPs offer higher adsorption capacities in organic solvents but not in aqueous media [35,40].…”

Section: Methods Performance Comparisonmentioning

confidence: 99%

“…It is found that magnetic SR-MIPs are mostly discussed while other type ones are few studied. Our group [13] has prepared thermosensitive MIPs (TMIPs) for selective recognition and controlled adsorption and release of BPA by the temperature regulation. The TMIPs were proved to be ideal candidates for SPE, and thereby the TMIPs-SPE was potentially applicable for highly efficient separation, extraction and determination of trace BPA in seawater and yogurt samples.…”

Section: Introductionmentioning

confidence: 99%

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Water-compatible temperature and magnetic dual-responsive molecularly imprinted polymers for recognition and extraction of bisphenol A

Wang

Lü

et al. 2016

Journal of Chromatography A

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174

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Versatile molecularly imprinted polymers (MIPs) have been widely applied to various sample matrices, however, molecular recognition in aqueous media is still difficult. Stimuli-responsive MIPs have received increasing attentions due to their unique feature that the molecular recognition is regulated by specific external stimuli. Herein, water-compatible temperature and magnetic dual-responsive MIPs (WC-TMMIPs) with hydrophilic brushes were prepared via reversible addition-fragmentation chain transfer precipitation polymerization for reversible and selective recognition and extraction of bisphenol A (BPA). Transmission electron microscopy (TEM), Fourier transform infrared spectrometer (FT-IR) and vibrating sample magnetometry (VSM) as characterization methods were used to examine the successful synthesis of polymers, and the resultant WC-TMMIPs showed excellent thermosensitivity and simple rapid magnetic separation. Controlled adsorption and release of BPA by temperature regulation were investigated systematically, and the maximum adsorption and removal efficiency toward BPA in aqueous solutions were attained at 35 °C and 45 °C, respectively, as well as a good recoverability was exhibited with the precision less than 5% through five adsorption-desorption cycles. Phenolic structural analogs were tested and good recognition specificity for BPA was displayed. Accordingly, the WC-TMMIPs were employed as adsorbents for magnetic solid-phase extraction (MSPE) and packed SPE of BPA from seawater samples. Using the two modes followed by HPLC-UV determination, excellent linearity was attained in the range of 0.1-14.5 μM and 1.3-125 nM, with low detection limits of 0.02 μM and 0.18 nM, respectively. Satisfactory recoveries for spiked seawater samples were achieved ranging from 86.3-103.5% and 96.2-104.3% with RSD within 2.12-4.33%. The intelligent WC-TMMIPs combining water-compatibility, molecular recognition, magnetic separation, and temperature regulation proved potentially applicable for selective identification, controlled adsorption/release and high-efficiency enrichment/removal of trace targets in complicated aqueous media.

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Section: Methods Performance Comparisonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water-compatible temperature and magnetic dual-responsive molecularly imprinted polymers for recognition and extraction of bisphenol A

Wang

Lü

et al. 2016

Journal of Chromatography A

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174

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“…The MIPs synthesized in organic solvent exhibit different swelling behavior as well as different size and shape of the cavities when those are employed to adsorb organic pollutants from water and thus often fail to distinguish between target and non‐target molecules . Therefore, hydrophilic monomers such as 2‐hydroxyethyl methacrylate, 2‐acrylamido‐2‐methyl‐propanesulfonic acid (AMPS), methacrylic acid (MAA) are being studied to selectively bind BPA through H‐bonding in aqueous solution, though the reported binding capacities of the synthesized MIPs in water are still low ,,. The MIPs containing bifunctional monomer might be expected to enhance its specific adsorption capacity due to the synergistic effect of both hydrophilic (H‐bonding) and hydrophobic (π‐π stacking, van der Waals, etc.)…”

Section: Introductionmentioning

confidence: 99%

Selective Navigation of Bisphenol‐A from Water to a Polarity Tuned Porous Molecularly Imprinted Polymer

2018

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A novel water compatible thermally stable molecularly imprinted polymer (MIP) was synthesized with bi‐functional monomers such as methacrylic acid (MAA) and 4‐vinyl pyridine (4VP) in the presence of mixed porogens such as THF and toluene for selectively higher adsorption of potential genotoxic compound Bisphenol‐A (BPA) compared to other structurally comparable phenolic compounds from aqueous solution at pH 7.0. The specific adsorption capacity (56.58 mg/g) and selectivity for BPA compared to non imprinted polymer (NIP) (44.10 mg/g) were achieved at 298 K under optimized conditions. The mesoporous imprints in the macroporous polymeric structure, higher pore volume, higher surface area, synergistic effect of H‐bonding, van der Waals force and π‐π interaction in bi‐functional cavities of MIP improved the recognition selectivity of BPA compared to NIP. The comparison of experimental adsorption isotherm with sixteen adsorption isotherm models conferred that the adsorption of BPA on MIP happened to energetically heterogeneous sites of the imprinted polymer through a spontaneous exothermic process. The kinetics of adsorption of BPA by MIP was best modeled via non‐linear pseudo‐second order kinetics. That novel MIP was found to be reusable for several cycles. This is the first report of the synthesis of thermally stable and mesoporous MAA‐4VP bi‐functional bulk MIPs having excellent selectivity, rapid binding kinetics and appropriate adsorption capacity for adsorption of BPA in water.

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“…That is, the resultant stimuli-responsive MIPs (SR-MIPs) act like a switch with the ability of reversible uptake and release of template/target molecules upon alternate external stimuli [23]. Till now, various SR-MIPs have been prepared, such as pH [24], temperature [25,26], photonic [27,28], and magnetic [29,30] ones. Among these external stimuli factors, photoirradiation is one of the most frequently used external stimuli for SR-MIPs due to its convenience to apply, easiness to control, and superior cleaning [31,32].…”

Section: Introductionmentioning

confidence: 99%

Preparation of photonic-magnetic responsive molecularly imprinted microspheres and their application to fast and selective extraction of 17β-estradiol

Peng

Luo

Xiong

et al. 2016

Journal of Chromatography A

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a b s t r a c tPhotonic-magnetic responsive molecularly imprinted microspheres (PM-MIMs) were prepared by seed polymerization, through suitable functionalization of magnetic nanoparticles for further coating with photoresponsive functional monomer and imprinted layers, and then were successfully applied to the fast and selective extraction of 17␤-estradiol (17␤-E 2 ) from real samples. The PM-MIMs possessed a sandwich micro-spherical structure containing Fe 3 O 4 core, SiO 2 middle layer, and MIPs shell with thickness of 25 nm. The PM-MIMs displayed excellent photoresponsive properties and could be rapidly separated from solutions under an external magnet. The PM-MIMs had specific affinity towards 17␤-E 2 with high adsorption capacity (Q max = 0.84 mg g −1 ) and fast binding kinetics (K d = 26.08 mg L −1 ). The PM-MIMs proved to be an ideal photoswitch with the ability of reversible uptake and release of 17␤-E 2 upon alternate 365 and 440 nm irradiation: 45.0% of 17␤-E 2 released from the PM-MIMs upon 365 nm irradiation, and 94.0% of the released 17␤-E 2 was rebound to the PM-MIMs at 440 nm. Accordingly, the PM-MIMs were applied for fast separation and extraction of 17␤-E 2 followed by HPLC-UV determination, presenting the low limit of detection (LOD, S/N = 3) and quantification (LOQ, S/N = 10) of 0.18 and 0.62 mol L −1 , respectively. The high recoveries for spiked milk powder and drinking water samples were in the range of 97.5-113.0% with relative standard deviations less than 4.4%. This study reasonably combined photonic response, magnetic separation and surface imprinting, which endowed the PM-MIMs with significant advantages of high adsorption capacity and fast binding kinetics, convenient separation and recycled use, and simple rapid eco-benign adsorption/elution processes for template molecules. Thus, the PM-MIMs based method may be a simple, rapid, convenient, cost-effective and environmentally-friendly way for simultaneous separation, enrichment and detection of trace 17␤-E 2 in complicated matrices.

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Thermosensitive molecularly imprinted polymers on porous carriers: Preparation, characterization and properties as novel adsorbents for bisphenol A

Cited by 63 publications

References 32 publications

Water-compatible temperature and magnetic dual-responsive molecularly imprinted polymers for recognition and extraction of bisphenol A

Water-compatible temperature and magnetic dual-responsive molecularly imprinted polymers for recognition and extraction of bisphenol A

Selective Navigation of Bisphenol‐A from Water to a Polarity Tuned Porous Molecularly Imprinted Polymer

Preparation of photonic-magnetic responsive molecularly imprinted microspheres and their application to fast and selective extraction of 17β-estradiol

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