Polymer-supported synthesis

Sherrington, David C.

doi:10.1007/978-94-011-0623-8_6

Cited by 42 publications

(26 citation statements)

References 116 publications

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“…Polymer-supported catalysts have been widely used in research and in process chemistry, but their use is restricted due to easy damage to the organic polymer (thermal or chemical). 5 Zeolites have excellent thermal and chemical stability and have been incredibly successful in vapor phase chemistry, but they are less useful for many organic reactions in which molecular sizes can exceed the small zeolitic pores and where liquid-phase reactions can lead to diffusion control. We have sought to exploit the recent emergence of mesoporous solids in organic synthesis by designing materials that can accommodate most organic molecules and have active surfaces that can catalyze important reactions.…”

Section: Introductionmentioning

confidence: 99%

Solid Acids for Green Chemistry

2002

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Solid acids and especially those based on micelle-templated silicas and other mesoporous high surface area support materials are beginning to play a significant role in the greening of fine and speciality chemicals manufacturing processes. A wide range of important organic reactions can be efficiently catalyzed by these materials, which can be designed to provide different types of acidity as well as high degrees of reaction selectivity. The solid acids generally have high turnover numbers and can be easily separated from the organic components. The combination of this chemistry with innovative reaction engineering offers exciting opportunities for innovative green chemical manufacturing in the future.

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Section: Introductionmentioning

confidence: 99%

Solid Acids for Green Chemistry

2002

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“…Large amounts of water can be adsorbed onto carbonization materials (produced from oolong tea leaves) by adsorbing the water molecules at 873 K for 2 hours. Thus, in the present study, micro-sized magnetic adsorbents were synthesized based on the procedure described by Yeong et al (2007), so that a high-gradient magnetic force field can be applied to separate, recover and recycle the adsorbent from water after the adsorption process (Sherrington and Hodge 1998;Tseng et al 2007). Another advantage of high-gradient magnetic separation is that non-magnetic impurities can be excluded during the recovery of magnetic adsorbents (Sherrington and Hodge 1998;Tseng et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, in the present study, micro-sized magnetic adsorbents were synthesized based on the procedure described by Yeong et al (2007), so that a high-gradient magnetic force field can be applied to separate, recover and recycle the adsorbent from water after the adsorption process (Sherrington and Hodge 1998;Tseng et al 2007). Another advantage of high-gradient magnetic separation is that non-magnetic impurities can be excluded during the recovery of magnetic adsorbents (Sherrington and Hodge 1998;Tseng et al 2007). The preparation and application of magnetic polymer adsorbents (FePAs) with several functional groups have been examined by many investigators (Burns and Graves 1987;Dauer and Dunlop 1991;Blankenstein 1997;Cocker et al 1997;Chalmers et al 1998;Miltenyi 1998;Sherrington and Hodge 1998;Dresco et al 1999;Denizli et al 2000;Tseng et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Another advantage of high-gradient magnetic separation is that non-magnetic impurities can be excluded during the recovery of magnetic adsorbents (Sherrington and Hodge 1998;Tseng et al 2007). The preparation and application of magnetic polymer adsorbents (FePAs) with several functional groups have been examined by many investigators (Burns and Graves 1987;Dauer and Dunlop 1991;Blankenstein 1997;Cocker et al 1997;Chalmers et al 1998;Miltenyi 1998;Sherrington and Hodge 1998;Dresco et al 1999;Denizli et al 2000;Tseng et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Application of Adsorption Microcalorimetry in the Study of Cu(II) Removal Using Magnetic Nanoparticles

Giraldo

Moreno–Piraján

2012

Adsorption Science & Technology

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ABSTRACT:The objective of this study was to explain the synthesis of magnetic polymer adsorbent (FePA) nanoparticles coupled with metal-chelating ligands of N-(2-acetamido)iminodiacetic acid (ADA) and their application for the removal of Cu(II) ions. Nanoparticles of magnetite-polyvinyl acetate (denoted as Fe-PVAC) were synthesized by coating Fe 3 O 4 (magnetite) with PVAC and vinyl acetate (VAC). Several sequential procedures were performed, and the coupling property of ADA was subsequently used to introduce functional groups on the surface of the Fe-PVAC nanoparticles. These sequential procedures yielded the following: magnetite-polyvinyl alcohol, nanoparticles of magnetite-polyvinyl propenepoxide and nanoparticles of magnetite-PVAC-ADA (Fe-PVAC-ADA). An example of the application of Fe-PVAC-ADA was explained by adsorbing Cu(II) ions, which can be chelated by the metal-chelating ligands of ADA in aqueous solution. Batch experiments were performed to determine the kinetics and mechanism of Cu(II) adsorption by the Fe-PVAC-ADA nanoparticles. The adsorption of Cu(II) on Fe-PVAC-ADA was monitored by adsorption microcalorimetry.

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“…[1][2][3][4][5][6][7][8][9][10][11] The polymer or colloid usually is not involved in the making and breaking of chemical bonds but only serves as a separate phase or pseudophase. In all cases, the kinetics can be analyzed in terms of a two-phase model in which the reactant species partition between the aqueous and colloidal phases and react at different rate constants in the two phases.…”

Section: Introductionmentioning

confidence: 99%

Quaternary ammonium ion dendrimers from methylation of poly(propylene imine)s

Kreider

Ford

2001

J. Polym. Sci. A Polym. Chem.

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The poly(propylene imine) dendrimers DAB‐dendr‐(NH2)8, DAB‐dendr‐(NH2)32, and DAB‐dendr‐(NH2)64 were fully converted with iodomethane to quaternary ammonium ions at both chain ends and branch points and, with less iodomethane, were partially converted to quaternary ammonium ions mainly at end groups. Amidation of the primary amine ends followed by treatment with iodomethane gave the first dendrimers with quaternary ammonium ions only at branch points. After an exchange of iodide counterions for chloride, all of the quaternary ammonium ion dendrimers slightly increased the rate of decarboxylation of 6‐nitrobenzisoxazole‐3‐carboxylate ion in an aqueous solution. Similar quaternary ammonium ion dendrimers with more hydrophobic interiors or more hydrophobic chains on the ends were much more active catalysts for the decarboxylation. © 2001 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 39: 821–832, 2001

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Polymer-supported synthesis

Cited by 42 publications

References 116 publications

Solid Acids for Green Chemistry

Solid Acids for Green Chemistry

Application of Adsorption Microcalorimetry in the Study of Cu(II) Removal Using Magnetic Nanoparticles

Quaternary ammonium ion dendrimers from methylation of poly(propylene imine)s

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