Adsorption isotherms of a molecular imprinted polymer prepared in the presence of a polymerisable template

Baggiani, Claudio; Giraudi, Gianfranco; Giovannoli, Cristina; Tozzi, Cinzia; Anfossi, Laura

doi:10.1016/s0003-2670(03)00671-8

Cited by 84 publications

(52 citation statements)

References 25 publications

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“…After equilibration for 2 h at room temperature, the free and bound OC concentrations were quantified following the same procedure as mentioned earlier. The data from the batch rebinding experiments were further processed according to the following Langmuir and Freundlich equations (3,4) [37,38,42]:…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Molecularly Imprinted Polymers for Selective Extraction of Oblongifolin C from <em>Garcinia yunnanensis</em> Hu

Wang¹,

Wenwei²,

Shen³

et al. 2017

Preprint

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Molecularly imprinted polymers (MIPs) were synthesized and applied for the selective extraction of oblongifolin C (OC) from fruit extracts of Garcinia yunnanensis Hu. A series of experiments and computational approaches were employed to improve the efficiency of screening for optimal MIP systems in the study. The molar ratio (1:4) was chosen at last based on the comparison of the binding energy of the complexes between the template (OC) and functional monomers using density functional theory (DFT) at the RI-PBE-D3-gCP/def2-TZVP level of theory. The binding characterization and the molecular recognition mechanism of MIPs were further explained using the molecular modeling method and NMR and IR spectra data. The reusability of this approach was demonstrated in over 20 batch rebinding experiments. 140.5 mg of OC (>95% purity) was obtained from the 5 g extracts with 2 g of MIPs with the best binding properties through gradient elution program from 35% to 70% methanol-water solution. At the same time, another structural analog, 46.5 mg of guttiferone K (GK) (>88% purity), was also obtained by the gradient elution procedure. Our results showed that the structural analogs could be separated from the crude extracts by the molecularly imprinted solid-phase extraction (MISPE) using a gradient elution procedure for the first time.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Molecularly Imprinted Polymers for Selective Extraction of Oblongifolin C from <em>Garcinia yunnanensis</em> Hu

Wang¹,

Wenwei²,

Shen³

et al. 2017

Preprint

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“…Baggiani and co-workers [84] investigated the adsorption isotherms of polymers prepared by imprinting them with 2,4,5-trichlorophenoxyacetic acid (2,4,5-T). The polymers were prepared by thermoinduced polymerization of template mixtures, 4-vinylpyridine and ethylene dimethacrylate.…”

Section: Examplesmentioning

confidence: 99%

New Biosorbent Materials: Selectivity and Bioengineering Insights

Kyzas

Matis

2014

Processes

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Many researchers have studied the biosorption of different pollutants. However, a quite limited number of works focus on selectivity, which may be characterized as specific property for each biosorbent. Two main criteria need to be adopted for the selection and synthesis of modern biosorbents, such as their rebinding capacity and selectivity for only one target, molecule, ion, etc. Selective biosorption could be achieved using in synthesis an innovative technique termed molecular imprinting; the idea applied through specific polymers (Molecular Imprinted Polymers (MIPs)) was used in many fields, mainly analytical. In the present work, also isotherm and kinetic models were reviewed highlighting some crucial parameters, which possibly affect selectivity. A critical analysis of the biosorption insights for biosorbents, mostly selective, describes their characteristics, advantages and limitations, and discusses various bioengineering mechanisms involved.

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“…17,18 The competitive Langmuir isotherms for liquid chromatography has been studied by Juza 17,19 and Guiochon, 20 and the multi-compounds competitive isotherm was shown to be better than that of the single compound isotherm. [21][22][23] According to reports in the literature, many isotherms have been successfully employed to calculate the binding properties of MIPs: simple Langmuir, SIPs models, Bi-Langmuir models, Jovanovic model, Bi-Jovanovic model, and Freundlich-Jovanovic model. 22 In this work, the adsorption equilibrium data of a single compound were correlated into five isotherm models: linear, Langmuir, Freundlich, quadratic, and Langmuir Extension isotherms.…”

Section: Introductionmentioning

confidence: 99%

“…[21][22][23] According to reports in the literature, many isotherms have been successfully employed to calculate the binding properties of MIPs: simple Langmuir, SIPs models, Bi-Langmuir models, Jovanovic model, Bi-Jovanovic model, and Freundlich-Jovanovic model. 22 In this work, the adsorption equilibrium data of a single compound were correlated into five isotherm models: linear, Langmuir, Freundlich, quadratic, and Langmuir Extension isotherms. For the developed synthesis and manufacture of MIP, a molecular imprinted polymer stationary phase was produced using (+)C as a template, AM as a functional monomer, and EGDMA as a cross-linker.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Isotherms of Catechin Compounds on (+)Catechin-MIP

Jin¹,

Wan²,

Row

2008

Bulletin of the Korean Chemical Society

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A molecular imprinted polymer (MIP) using (+)catechin ((+)C) as a template and acrylamide (AM) as a functional monomer was prepared. Acetonitrile was used as the porogen with ethylene glycol dimethacrylate (EGDMA) as the crosslinker and 2,2'-azobis(isobutyronitrile) (AIBN) as the initiator. The adsorption isotherms in the MIP were measured and the parameters of the equilibrium isotherms were estimated by linear and nonlinear regression analyses. The linear equation for original concentration and adsorpted concentrations was then expressed, and the adsorption equilibrium data were correlated into Langmuir, Freundlich, quadratic, and Langmuir Extension isotherm models. The mixture compounds of (+)C and epicatechin (EC) show competitive adsorption on specific binding sites of the (+)catechin-MIP. The adsorption concentrations of (+)C, epicatechin (EC), epicatechin gallate (ECG), and epigallocatechin gallate (EGCG), on the (+)catechin-molecular imprinted polymer were compared. Through the analysis, the (+)catechin-molecular imprinted polymer showed higher adsorption ability than blank polymer which was synthesized molecular imprinted polymer without (+)catechin. Furthermore, the competitive Langmuir isotherms were applied to the mixture compounds of (+)C and EC.

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Adsorption isotherms of a molecular imprinted polymer prepared in the presence of a polymerisable template

Cited by 84 publications

References 25 publications

Molecularly Imprinted Polymers for Selective Extraction of Oblongifolin C from <em>Garcinia yunnanensis</em> Hu

Molecularly Imprinted Polymers for Selective Extraction of Oblongifolin C from <em>Garcinia yunnanensis</em> Hu

New Biosorbent Materials: Selectivity and Bioengineering Insights

Adsorption Isotherms of Catechin Compounds on (+)Catechin-MIP

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