Synthesis of polyaniline using horseradish peroxidase immobilized on plasma‐functionalized polyethylene surfaces as initiator

Álvarez, Silvia; Manolache, S.; Dénès, F.

doi:10.1002/app.11511

Cited by 31 publications

(15 citation statements)

References 36 publications

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“…5A. The resulting polyaniline had conductivities comparable to polyaniline produced from immobilized HPO in organic solvents, ~10 -3 S/cm [82]. Although water can extract HPO from the ionic liquid, the water/aniline reaction mixture does not and HPO remains in the ionic liquid.…”

Section: Ionic Liquids As Cosolvent For Aqueous Phase Reactionsmentioning

confidence: 84%

Toward advanced ionic liquids. Polar, enzyme-friendly solvents for biocatalysis

Gorke

Srienc

Kazlauskas

2010

Biotechnol Bioproc E

253

159

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Ionic liquids, also called molten salts, are mixtures of cations and anions that melt below 100 o C. Typical ionic liquids are dialkylimidazolium cations with weakly coordinating anions such as (MeOSO 3 ) or (PF 6 ). Advanced ionic liquids such as choline citrate have biodegradable, less expensive, and less toxic anions and cations. Deep eutectic solvents are also included in the advanced ionic liquids. Deep eutectic solvents are mixtures of salts such as choline chloride and uncharged hydrogen bond donors such as urea, oxalic acid, or glycerol. For example, a mixture of choline chloride and urea in 1:2 molar ratio liquefies to form a deep eutectic solvent. Their properties are similar to those of ionic liquids. Water-miscible ionic liquids as cosolvents with water enhance the solubility of substrates or products. Although traditional water-miscible organic solvents also enhance solubility, they often inactivate enzymes, while ionic liquids do not. The enhanced solubility of substrates can increase the rate of reaction and often increases the regioor enantioselectivity. Ionic liquids can also be solvents for non-aqueous reactions. In these cases, they are especially suited to dissolve polar substrates. Polar organic solvent alternatives inactivate enzymes, but ionic liquids do not even when they have similar polarities. Besides their solubility properties, ionic liquids and deep eutectic solvents may be greener than organic solvents because ionic liquids are nonvolatile, and can be made from nontoxic components. This review covers selected examples of enzyme catalyzed reaction in ionic liquids that demonstrate their advantages and unique properties, and point out opportunities for new applications. Most examples involve hydrolases, but oxidoreductases and even whole cell reactions have been reported in ionic liquids. © KSBB hÉóïçêÇëW=áçåáÅ=äáèìáÇëI=ÇÉÉé=ÉìíÉÅíáÅ=ëçäîÉåíëI=ÜóÇêçä~ëÉëI=çñáÇçêÉÇìÅí~ëÉëI=éçäóãÉêáò~íáçå= = = = = IONIC LIQUIDS AND DEEP EUTECTIC SOLVENTSIonic liquids, also called molten salts, are mixtures of cations and anions that melt below 100 o C. The low melting point stems from a mismatch in the size of the anion and cation that prevents crystallization. Changing the structures of the anions or cations can tune the polarities and other properties. Even though they are salts, their polarities are only moderate, similar to ethanol. Ionic liquids have negligible vapor pressure. Ionic liquids are viscous, typically 0.1 Pas or more, which is similar to glycerol or honey.The first ionic liquid -ethylammonium nitrate (mp 12 o C) -was reported in 1914 [1], but attracted limited use. The first generation of widely studied ionic liquids used the dialkylimmidazolium and related cations reported in 1982 [2], Fig. 1. Varying the cation structure varied the properties of the ionic liquid. The anions were chloroaluminate or other metal halide anions, which react with water and thus are not suited for biotransformations. The second generation of ionic liquids, discovered a decade later [3], replaced the water r...

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Section: Ionic Liquids As Cosolvent For Aqueous Phase Reactionsmentioning

confidence: 84%

Toward advanced ionic liquids. Polar, enzyme-friendly solvents for biocatalysis

Gorke

Srienc

Kazlauskas

2010

Biotechnol Bioproc E

253

159

View full text Add to dashboard Cite

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“…Additionally, HRP entrapped in crosslinked matrices of chitosan (58) or covalently attached to polyethylene (PE) surfaces (59) have been used to polymerize aniline. The PANI produced in both cases appear spectroscopically similar to those produced via free enzyme; however, the recyclability of these immobilized enzymes were not tested.…”

Section: Synthesis Of Pani Catalyzed By Immobilized Enzymementioning

confidence: 99%

Enzymatic Synthesis of Electrically Conducting Polymers

Bouldin

Kokil

Ravichandran

et al. 2010

ACS Symposium Series

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“…This is the reasoning behind the well-established strategy of enzyme immobilization on solid supports, which has been applied to HRP [22][23][24][25][26]. HRP has been immobilized on chitosan powder [27], aluminum oxide [28], functionalized polyethylene [29], collagen [30], titanium oxide [31], carbon nanotubes [32], and other templates [22][23][24][25][26]. In fact, new alternative strategies are being studied in many research groups for recycling and reusing the enzyme in the biocatalytic synthesis of polymers.…”

Section: Peroxidases In Polymer Synthesismentioning

confidence: 99%

Oxireductases in the Enzymatic Synthesis of Water-Soluble Conducting Polymers

Ochoteco

Mecerreyes

2010

Advances in Polymer Science

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This chapter reviews recent advances in the field of biocatalytic synthesis of water-soluble conducting polymers. Biocatalysis is proposed as a versatile tool for synthesis of conducting polymers. First, the enzymatic synthesis of conducting polymers and its mechanism is discussed as well as the use of different type of enzymes. Next, we describe the use of a new bifunctional template (sodium dodecyl diphenyloxide disulfonate) in the synthesis of polyaniline as a strategy to improve the water solubility and electrical conductivity in the obtained polymer. The recent development of enzyme-catalyzed polymerization of 3,4-ethylenedioxythiophene (EDOT) in the presence of polystyrenesulfonate is discussed. This method results in PEDOT materials that show an electrical conductivity of 2 × 10 −3 S cm −1 and posses excellent film formation ability, as confirmed by atomic force microscopy images. Finally, a simple method for immobilizing horseradish peroxidases in the biocatalytic synthesis of water-soluble conducting polymers is presented. This method is based on a biphasic catalytic system in which the enzyme is encapsulated inside the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate, while other components remain in the aqueous phase. The enzyme is easily recovered after reaction and can be reused several times.

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Synthesis of polyaniline using horseradish peroxidase immobilized on plasma‐functionalized polyethylene surfaces as initiator

Cited by 31 publications

References 36 publications

Toward advanced ionic liquids. Polar, enzyme-friendly solvents for biocatalysis

Toward advanced ionic liquids. Polar, enzyme-friendly solvents for biocatalysis

Enzymatic Synthesis of Electrically Conducting Polymers

Oxireductases in the Enzymatic Synthesis of Water-Soluble Conducting Polymers

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