Kinetic study on peroxidation of benzaldehyde by polymer‐immobilized cobalt‐EDTA complex

Wang, Cheng Chien; Li, Wen Sam; Cheng, Shih Kai; Chen, Chuh Yean; Kuo, Jui‐Chao

doi:10.1002/app.2183

Cited by 10 publications

(1 citation statement)

References 16 publications

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“…Thus, a chelating vinyl monomer, 2-methacrylic acid 3-(bis-carboxymethylamino)-2-hydroxy-propyl ester (GMA-IDA), which has an iminodiacetic acid chelating group, has been successfully synthesized and further copolymerized with the other vinyl monomers to manufacture the chelating copolymer with high adsorption of metal ions. In addition, this kind of metal-chelated copolymer has been utilized in a number of applications, including wastewater treatment, , gas-membrane separation, organic synthesis catalysts, , and solid-state electrolytes. − …”

Section: Introductionmentioning

confidence: 99%

Polypropylene Fibers Modified by Plasma Treatment for Preparation of Ag Nanoparticles

2006

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A novel method for preparing poly(propylene-graft-2-methacrylic acid 3-(bis-carboxymethylamino)-2-hydroxy-propyl ester)-silver fibers (PPG-IAg fibers) by plasma-induced grafting polymerization is presented in this study. The chelating groups, -N(CH2COO-)2 (GMA-IDA), on the surface of the PPG-I fibers are the coordination sites for chelating silver ions. At these sites, Ag nanoparticles were grown first by reduction with UV light with a wavelength of 366 nm, and second, through immersion in a 24% formaldehyde solution with pH values set variously at 2, 5, 8, and 11. The characteristics of the PPG-I fibers with differing durations of plasma treatment were monitored by using a Fourier transform infrared (FT-IR) spectroscope. Scanning electronic microscopy (SEM) and elemental analysis show that the percentage of GMA-IDA grafted onto PP fiber reaches a maximum when the plasma treatment time is 3 min. Plasma treatment time beyond a certain length of time results in an abundance of free radicals and causes considerable cross-linking on the fiber surface which thus decreases the extent of grafting. Moreover, the crystalline phase of Ag nanoparticles is identified by using X-ray diffraction (XRD). When the PPG-I fibers are reduced by the UV light method, SEM and TEM microscopes reveal that the size of the Ag nanoparticles on the fiber surface decreases significantly with the increase of pH values in aqueous solutions. Notably, in the reduction of formaldehyde solution, the particle size of Ag nanoparticles reaches a minimum at the lowest pH value. The TEM observations show that Ag nanoparticles are distributed both in the exterior and interior of the grafting layer. In addition, under high pH values the distribution of the Ag nanoparticles permeate more deeply in the GMA-IDA grafting layer due to the swelling effect of the GMA-IDA polymer.

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Section: Introductionmentioning

confidence: 99%

Polypropylene Fibers Modified by Plasma Treatment for Preparation of Ag Nanoparticles

2006

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Stability constants of polymer‐bound iminodiacetate‐type chelating agents with some transition‐metal ions

Chen

2002

J of Applied Polymer Sci

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A chelating vinyl monomer, glycidyl methacrylate (GMA)-iminodiacetic acid (IDA), was formed by the reaction between GMA and IDA. Three polymeric chelating agents, PGMA-IDA, PGMA-IDA-co-methyl acrylate (MA), and PGMA-IDA-co-acrylamide (AAm), were also synthesized. Acid dissociation constants and stability constants of these chelating agents with Ni(II), Zn(II), and Co(II) were determined by means of potentiometric titration and ultraviolet-visible spectrophotometry, respectively. The values of K a1 and K a2 of all the polymeric chelating agents were smaller than those of GMA-IDA. The stability constants of all the polymeric chelating agents were larger than those of GMA-IDA. Increasing the MA content within PGMA-IDAco-MA affected the stability constant only slightly. A proper molar ratio of AAm in PGMA-IDA-co-AAm, stability constants was 30 -60 times greater than that of GMA-IDA. However, as the molar content of AAm increased, the stability constant of PGMA-IDA-co-AAm decreased. The results obtained in the polymer system are explained in terms of the polymer's stereo and entanglement structure, the neighboring effect, and the hydrophobic/hydrophilic nature of MA or AAm.

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Effect of the nature and degree of crosslinking on the catalase‐like activity of polystyrene‐supported schiff base‐metal complexes

Kumar

Mathew

2004

J of Applied Polymer Sci

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Catalase-like activity of the metal complexes of various crosslinked polystyrene-supported Schiff bases were carried out and correlated with the nature and degree of crosslinking in the polymer support. Polystyrenes with 2-20 mol % ethyleneglycol dimethacrylate (EGDMA), 1,4-butanediol dimethacrylate (BDDMA) and 1,6-hexanediol diacrylate (HDODA) were used as polymer supports. functions of diethylenetriamine and salicylaldehyde were incorporated to the chloromethylpolystyrene by polymer analogous reactions and complexed with Fe(II), Fe(III), Co(II), Ni(II), and Cu(II) ions. The metal uptake decreased in the order: Cu(II) Ͼ Co(II) Ͼ Ni(II) Ͼ Fe(III) Ͼ Fe(II), and extent of metal uptake by the various crosslinked system varied with the nature and degree of the crosslinking agent. The polymeric ligands and the metal complexes were characterized by various analytical techniques. The catalytic activities of these metal complexes were investigated towards the decomposition reaction of hydrogen peroxide. Generally among the various metal complexes, the catalytic activities decreased in the order:With increasing rigidity of the crosslinking agent their catalytic activity also decreased. Of the various crosslinked systems, the catalytic activity decreased in the order: HDODA-Ͼ BDDMA-Ͼ EGDMA-crosslinked system. Also, the catalytic activity is higher for low crosslinked systems and decreased further with increasing degree of crosslinking.

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Kinetic study on peroxidation of benzaldehyde by polymer‐immobilized cobalt‐EDTA complex

Cited by 10 publications

References 16 publications

Polypropylene Fibers Modified by Plasma Treatment for Preparation of Ag Nanoparticles

Polypropylene Fibers Modified by Plasma Treatment for Preparation of Ag Nanoparticles

Stability constants of polymer‐bound iminodiacetate‐type chelating agents with some transition‐metal ions

Effect of the nature and degree of crosslinking on the catalase‐like activity of polystyrene‐supported schiff base‐metal complexes

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