Metal Ion Selective Molecularly Imprinted Materials

Murray, George M.; Southard, Glen E.

doi:10.1201/9781420030303.ch22

Cited by 7 publications

(9 citation statements)

References 30 publications

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“…[35] On the other hand, the mean Eu À N distance of 2.527(9) is somewhat shorter than that of 2.554(13) reported for the bis-amide complex. [35] The solution structure of the Y and La tris complexes was investigated by 1 H NMR spectroscopy (Table 1). In [D 6 ]DMSO, distinct signals were observed for free and coordinated L1…”

Section: Synthesis and Characterization Of The Complexesmentioning

confidence: 99%

“…Recently, the preparation of new materials for metal-cation extraction based on the ion-imprinting concept was described: a matrix is synthesized in the presence of an ionic template and chelating resins are then obtained by removal of the targeted cation. [1][2][3][4][5] The cavities thus obtained in the polymer exhibit high selectivity towards specific metal ions, high capacity and the ability to deal with high concentrations of metal ions. Molecularly imprinted polymers have been successfully used as mimics of antibodies in an immunoassay-like technique [6,7] and of the active site of natural enzymes, [8][9][10] as well as in biorecognition.…”

Section: Introductionmentioning

confidence: 99%

“…It merges the easy handling of a chromatographic method with the efficiency of solvent extraction. Recently, the preparation of new materials for metal‐cation extraction based on the ion‐imprinting concept was described: a matrix is synthesized in the presence of an ionic template and chelating resins are then obtained by removal of the targeted cation 1–5. The cavities thus obtained in the polymer exhibit high selectivity towards specific metal ions, high capacity and the ability to deal with high concentrations of metal ions.…”

Section: Introductionmentioning

confidence: 99%

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Use of Dipicolinate‐Based Complexes for Producing Ion‐Imprinted Polystyrene Resins for the Extraction of Yttrium‐90 and Heavy Lanthanide Cations

Chauvin

Bünzli

Bochud

et al. 2006

Chemistry A European J

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Highly selective separation of yttrium (and lanthanides) is of interest for the design of radiopharmaceuticals, and an efficient method based on the ion‐imprinting concept is proposed here. The synthesis and structural, thermodynamic and photophysical characterization of complexes of trivalent yttrium and lanthanides with two new vinyl derivatives of dipicolinic acid, HL1 and L2, are described. The feasibility of using ion‐imprinted resins for yttrium and lanthanide separation is demonstrated. The resins were obtained by copolymerization with styrene and divinylbenzene and subsequent acid treatment to remove the metal ion. High‐resolution Eu luminescence experiments revealed that the geometry of the complexation sites is well preserved in the imprinted polymers. The ion‐imprinted polymer based on HL1 proved to be particularly well adapted for yttrium extraction, having a sizeable capacity (8.9±0.2 mg g−1 resin) and a fast rate of extraction (t1/2=1.7 min). In addition, lighter and heavier lanthanide ions are separated. Finally, the resin displays high selectivity for yttrium and lanthanide cations against alkali and alkaline earth metals. For instance, in a typical experiment, 10 mg of yttrium was extracted from 5 g of milk ash sample by 2 g of the resin. The good separation properties displayed by the resin based on HL1 open interesting perspectives for the production of highly pure 90Y and radiolanthanides for medical applications, and for trace analysis of these radiochemicals in food and in the environment.

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Section: Synthesis and Characterization Of The Complexesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Use of Dipicolinate‐Based Complexes for Producing Ion‐Imprinted Polystyrene Resins for the Extraction of Yttrium‐90 and Heavy Lanthanide Cations

Chauvin

Bünzli

Bochud

et al. 2006

Chemistry A European J

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“…Because the iron concentration after soaking polymers in nitric acid is significantly higher than the nitric acid soak solution, it is apparent that there is still some slight leaching of iron from nitric acid soaking. However, the amount of iron leached from the polymer is low in comparison to iron concentrations developed from an elution step after ferric ion loading (and, of course, water washing) (7). Therefore the iron loading capacity numbers for these resins reflect real iron sequestering.…”

Section: Resultsmentioning

confidence: 98%

Molecularly Imprinted Ion-Exchange Resin for Fe³⁺

Owens

Southard

Houten

et al. 2005

Separation Science and Technology

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Ion exchange resins selective for the sequestration of Fe 3þ from aqueous solutions containing citrate were prepared by the molecular imprinting technique. Sorption characteristics of imprinted resins prepared with high (85 mole%) and low (3 mole%) amounts of covalent cross-linking were examined. Experiments to determine loading capacity and selectivity, relative to several metal ions of physiological significance, were performed. The Fe 3þ capacity of the highly cross-linked resin was larger but the selectivity was lower.

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“…[1,2] MIPs are cross-linked polymers with specific binding for a particular analyte. [3,4] These binding sites are tailor made in situ by the copolymerization of functional and cross-linking monomers in the presence of a print molecule called the 'template'. After polymerization, the removal of template leaves recognition sites that are complementary to the print molecule in terms of size, shape, and functionality.…”

Section: Introductionmentioning

confidence: 99%

A biomimetic potentiometric sensor based on molecularly imprinted polymer for the determination of memantine in tablets

Arvand

Samie

2012

Drug Testing and Analysis

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Memantine hydrochloride is one of the first novel class medications for treatment of Alzheimer's disease. In this work, a biomimetic potentiometric sensor, based on a non-covalent imprinted polymer, was fabricated for the recognition and determination of memantine in pure drug and tablet pharmaceutical form. The molecularly imprinted polymer was synthesized by precipitation polymerization, using memantine hydrochloride as a template molecule, methacrylic acid as a functional monomer, and ethylene glycol dimethacrylate as a cross-linking agent. The sensor was developed by dispersing the memantine imprinted polymer particles in dibutyl sebacate plasticizer and embedding in poly(vinyl chloride) matrix. The wide linear range (10(-5) -10(-1) M), with a near Nernstian response of 57.4 mV/decade, a limit of detection 6.0 × 10(-6) M, fast response time (~15 s) and a satisfactory long-term stability (4 months) are characterizations of the proposed sensor. The sensor showed a high selectivity and a sensitive response to the template in aqueous system. The standard electrode potentials were determined at different temperatures and used to calculate the isothermal coefficient of the electrode. It was used as indicator electrode in potentiometric determination of memantine in pharmaceutical formulations.

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Metal Ion Selective Molecularly Imprinted Materials

Cited by 7 publications

References 30 publications

Use of Dipicolinate‐Based Complexes for Producing Ion‐Imprinted Polystyrene Resins for the Extraction of Yttrium‐90 and Heavy Lanthanide Cations

Use of Dipicolinate‐Based Complexes for Producing Ion‐Imprinted Polystyrene Resins for the Extraction of Yttrium‐90 and Heavy Lanthanide Cations

Molecularly Imprinted Ion-Exchange Resin for Fe³⁺

A biomimetic potentiometric sensor based on molecularly imprinted polymer for the determination of memantine in tablets

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Metal Ion Selective Molecularly Imprinted Materials

Cited by 7 publications

References 30 publications

Use of Dipicolinate‐Based Complexes for Producing Ion‐Imprinted Polystyrene Resins for the Extraction of Yttrium‐90 and Heavy Lanthanide Cations

Use of Dipicolinate‐Based Complexes for Producing Ion‐Imprinted Polystyrene Resins for the Extraction of Yttrium‐90 and Heavy Lanthanide Cations

Molecularly Imprinted Ion-Exchange Resin for Fe3+

A biomimetic potentiometric sensor based on molecularly imprinted polymer for the determination of memantine in tablets

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Molecularly Imprinted Ion-Exchange Resin for Fe³⁺