Novel Synthetic Pathway to a Poly(phenylene oxide). Laccase-Catalyzed Oxidative Polymerization of Syringic Acid

Ikeda, Rinsei; Uyama, Hiroshi; Kobayashi, Shiro

doi:10.1021/ma951810b

Cited by 133 publications

(54 citation statements)

References 13 publications

(36 reference statements)

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“…7,8 One method, termed "template synthesis," entails the preparation of a variety of micro-and nanomaterials for a desired morphology and provides a route for enhancing nanostructure order. 3,[9][10][11][12] The processes of chemical methods have been examined for one or multidimensional nanostructures of PANI, such as tubes, belts, and fibers. [13][14][15][16][17][18][19][20][21] As such, chemical synthesis using various oxidants [15][16][17][18][19] has been employed to adjust the molecular structures and physical properties of PANI nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Biological templating of polyaniline and polypyrrole using E. coli

Basavaraja

Kim

et al. 2010

Macromol. Res.

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This study evaluated a simple method for preparing microstructures of polyaniline (PANI) and polypyrrole (PPy) using a different concentrations of Escherichia coli (E. coli) as a biological template. Scanning electron microscopy and transmission electron microscopy revealed fibers, cones/spheres, and agglomerated fiber structures with dimensions ranging from 0.5 to 1 µm. The results yielded structures with shapes that varied according to the E. coli concentration. Based on these results, this study suggests that the biological templating approach can be a superior alternative to preparing and fabricating conducting polymers that may be useful for obtaining nano-or micromaterials and devices.

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Section: Introductionmentioning

confidence: 99%

Biological templating of polyaniline and polypyrrole using E. coli

Basavaraja

Kim

et al. 2010

Macromol. Res.

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“…[21][22][23] Laccase belongs to an oxidoreductase having a copper-protein moiety as active site. The sample film prepared on a glass slide stood at 30 • C under the humidity of 80% for 16 h.…”

Section: Resultsmentioning

confidence: 99%

Laccase-Catalyzed Curing of Vinyl Polymers Bearing a Phenol Moiety in the Side Chain

Ikeda

Uyama

Kobayashi

2001

Polym J

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KEY WORDSCuring / Laccase / Phenol / Oxidative Coupling / Recently, environmentally benign process of polymer curing has been paid much attention in coating industry, since the conventional industrial method often involves severe curing conditions with a large amount use of energy. 1 Development of new curing methodology under ambient conditions is strongly desired.Polymerizations catalyzed by enzymes (enzymatic polymerizations) have been investigated extensively as new methodology of polymer syntheses. 2-10 Characteristics of enzyme catalysis are expected to provide new polymeric materials, which are difficult to be obtained by conventional methods. Peroxidases induced the oxidative polymerization of phenol derivatives under mild reaction conditions to produce a new class of functional polyphenols in good yields. This process does not use toxic formaldehyde and their synthetic procedure is very facile. The polyphenols enzymatically obtained have structures normally composed of a mixture of phenylene and oxyphenylene units, which are formed by C-C and C-O couplings of phenols, respectively. Recent investigations revealed that the coupling selectivity (regioselectivity) could be controlled by changing the solvent composition, yielding a DMFsoluble polyphenol. 11,12 Very recently, we have created a novel system of enzymatic polymerization, i.e., a laccase-catalyzed crosslinking reaction of new "urushiol analogues" for the preparation of "artificial urushi". [13][14][15] Single-step synthesis of the urushiol analogues was achieved by using lipase as catalyst. These compounds were cured in the presence of laccase catalyst under mild reaction conditions without use of organic solvents to produce the crosslinked polymeric film with high gloss surface and good elastic properties. This multienzymatic processes are highly significant as a fundamental study for † To whom correspondence should be addressed.

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“…PCL and laccase derived from Myceliophthore ( ML ) were active for the polymerization of syringic acid to give PPO with molecular weight up to 1.8 × 10 4 [87] . Enzymatic synthesis of PPO was also achieved from 2,6 -dimethylphenol using PCL catalyst [44] .…”

Section: Laccase -Catalyzed Polymerization Of Phenolicsmentioning

confidence: 99%