Molecular imprinting for removing highly toxic organic pollutants

Shen, Xiantao; Zhu, Lihua; Wang, Nan; Ye, Lei; Tang, Heqing

doi:10.1039/c2cc14654a

Cited by 163 publications

(122 citation statements)

References 107 publications

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“…1 For the past few decades, the interest and attention shown toward this technology has been increasing at an amazing pace. [1][2][3][4] This is mainly attributed to the diversity of potential applications of the versatile molecularly imprinted polymers (MIPs) in purication/separation, 4,5 chemo/biosensing, 6 catalysis, 7,8 drug delivery 9,10 and so on. MIPs exhibit many attractive characteristics; however, they still have met with some limitations, such as incomplete template removal, low binding capacity and slow mass transfer.…”

Section: Introductionmentioning

confidence: 99%

Uniform core–shell molecularly imprinted polymers: a correlation study between shell thickness and binding capacity

et al. 2014

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Core-shell molecularly imprinted polymers (CS-MIPs) have aroused increasing interest owing to their easy accessibility and favorable mass transfer. Herein, we explore the correlation between shell thickness and binding capacity by using Sudan I as template molecule to prepare different CS-MIPs at the surface of carboxyl polystyrene through emulsion polymerization with a two-step temperature-rising process. Extensive characterization was performed using techniques such as SEM/TEM, FT-IR, BET, and TGA. Main factors were systematically studied such as the amount of prepolymer solution, the amount of SDS, and the temperature step. Under the optimized conditions, CS-MIPs with a shell thickness of 2.60 mm presented the highest binding capacity of 30.1 mmol g À1 and the most rapid mass transfer rate. A uniform sphere model was constructed, and it was found that template molecules located in the spherical MIPs with a diameter of 5.20 mm will be completely eluted, thereby attaining the maximum binding capacity.The static adsorption isotherm followed the Langmuir-Freundlich adsorption model, and the fast kinetics obeyed the pseudo-second-order kinetics model. High recognition specificity for Sudan I with respect to its analogues was displayed, with an imprinting factor of 2.7. The establishment of a critical value of shell thickness provides new insights into the preparation methodology and molecular recognition mechanism of core-shell imprinted polymers.

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Section: Introductionmentioning

confidence: 99%

Uniform core–shell molecularly imprinted polymers: a correlation study between shell thickness and binding capacity

et al. 2014

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“…These interactions all have been successfully applied into promoting the selectivity of SERS-based method into specific target monitoring [28][29][30][31]. Host-guest interaction is an important phenomenon in supramolecular chemistry, which describes the special interaction between the host molecules with unique structure and the guest smaller molecules or ions.…”

Section: Host-guest Interactionmentioning

confidence: 99%

“…The recognition cavities after removing the templates provide the capability and functionality to selectively rebind specific targets without interference from other molecules. The surface MIP technique has been used for selective detection and removing of organic pollutants from the complex matrix [30,55]. Such a strategy could be performed to functionalize the surface of the substrate to promote the recognition ability of the SERS method.…”

Section: Artificial Antibody-antigen Interaction (Molecular Imprintinmentioning

confidence: 99%

Precision Target Guide Strategy for Applying SERS into Environmental Monitoring

Ouyang¹,

Li²,

Zhu³

et al. 2017

Raman Spectroscopy and Applications

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Surface enhanced Raman spectroscopy (SERS) is a promising analytical technique that exhibits various applications in trace detection and identification. When it is applied into environmental monitoring, we should concern several key points to improve detection sensitivity and selectivity for the detection in complex matrix. In this tutorial review, we mainly focus on the strategies for improving the use of SERS into environmental application. The strategies are summarized for enhancing the ability of the substrate to selectively capture specific targets, and for achieving separation and concentration of the analytes from the matrix and the assembly structures for multiple phase detection. We have also introduced several newly developed detection systems using portable instruments and miniaturized devices that are more suitable for infield applications. In addition, we discuss the present challenges that hide it from wide real application and give the outlook for the future development in applying SERS in environmental monitoring.

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“…RB1 was synthesized based on RB by a two-step reaction according to previously reported method [22] with necessary modification, and the synthetic route was briefly illustrated in Scheme 2. Briefly, 1.2 g (2.5 mmol) of RB and 30 mL of ethanol were put in a 100 mL flask.…”

Section: Synthesis Of Rb1mentioning

confidence: 99%

“…The target analytes will be separated from coexisting substances and selectively adsorbed on the MIPs materials, followed by detection [19]. Because of its attractive selectivity, high mechanical and thermal stability, high adsorption capacity, as well as low cost and easy operation, MIPs have received extensive concerns and been widely applied in many fields, such as extraction separation [20,21], removal [22] and chemo/biosensors [23,24]. A number of studies for amino acids based on MIPs have been rapidly carried out.…”

Section: Introductionmentioning

confidence: 99%

Chemodosimeter-based fluorescent detection of l-cysteine after extracted by molecularly imprinted polymers

Cai

Zhong

et al. 2014

Talanta

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Chemodosimeter Rhodamine B a b s t r a c tA chemodosimeter-based fluorescent detection method coupled with molecularly imprinted polymers (MIPs) extraction was developed for determination of L-cysteine (L-Cys) by combining molecular imprinting technique with fluorescent chemodosimeter. The MIPs prepared by precipitation polymerization with L-Cys as template, possessed high specific surface area of 145 m 2 /g and good thermal stability without decomposition lower than 300 1C, and were successfully applied as an adsorbent with excellent selectivity for L-Cys over other amino acids, and enantioselectivity was also demonstrated. A novel chemodosimeter, rhodamine B1, was synthesized for discriminating L-Cys from its structurally similar homocysteine and glutathione as well as various possibly co-existing biospecies in aqueous solutions with notable fluorescence enhancement when adding L-Cys. As L-Cys was added with increasing concentrations, an emission band peaked at 580 nm occurred and significantly increased in fluorescence intensity, by which the L-Cys could be sensed optically. High detectability up to 12.5 nM was obtained. An excellent linearity was found within the wide range of 0.05-50 μM (r¼ 0.9996), and reasonable relative standard deviations ranging from 0.3% to 3.5% were attained. Such typical features as high selectivity, high sensitivity, easy operation and low cost enabled this MIPs-fluorometry to be potentially applicable for routine detection of trace L-Cys.

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Molecular imprinting for removing highly toxic organic pollutants

Cited by 163 publications

References 107 publications

Uniform core–shell molecularly imprinted polymers: a correlation study between shell thickness and binding capacity

Uniform core–shell molecularly imprinted polymers: a correlation study between shell thickness and binding capacity

Precision Target Guide Strategy for Applying SERS into Environmental Monitoring

Chemodosimeter-based fluorescent detection of l-cysteine after extracted by molecularly imprinted polymers

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