Show simple item record

dc.contributor.author
Walde, Peter
dc.contributor.author
Kashima, Keita
dc.contributor.author
Ćirić-Marjanović, Gordana
dc.date.accessioned
2020-01-23T07:58:04Z
dc.date.available
2019-07-24T02:19:42Z
dc.date.available
2019-07-25T10:11:38Z
dc.date.available
2020-01-23T07:58:04Z
dc.date.issued
2019-07-10
dc.identifier.issn
2296-4185
dc.identifier.other
10.3389/fbioe.2019.00165
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/354771
dc.identifier.doi
10.3929/ethz-b-000354771
dc.description.abstract
The polymerization of aniline to polyaniline (PANI) can be achieved chemically, electrochemically or enzymatically. In all cases, the products obtained are mixtures of molecules which are constituted by aniline units. Depending on the synthesis conditions there are variations (i) in the way the aniline molecules are connected, (ii) in the average number of aniline units per molecule, (iii) in the oxidation state, and (iv) in the degree of protonation. For many possible applications, the synthesis of electroconductive PANI with para-N-C-coupled aniline units in their half-oxidized and protonated state is of interest. This is the emeraldine salt form of PANI, abbreviated as PANI-ES. The enzymatic synthesis of PANI-ES is an environmentally friendly alternative to conventional chemical or electrochemical methods. Although many studies have been devoted to the in vitro synthesis of PANI-ES by using heme peroxidases with added hydrogen peroxide (H2O2) as the oxidant, the application of laccases is of particular interest since the oxidant for these multicopper enzymes is molecular oxygen (O2) from air, which is beneficial from environmental and economic points of view. In vivo, laccases participate in the synthesis and degradation of lignin. Various attempts of synthesizing PANI-ES with laccase/O2 in slightly acidic aqueous media from aniline or the linear aniline dimer PADPA (p-aminodiphenylamine) are summarized. Advances in the understanding of the positive effects of soft dynamic templates, as chemical structure guiding additives (anionic polyelectrolytes, micelles, or vesicles), for obtaining PANI-ES-rich products are highlighted. Conceptually, some of these template effects appear to be related to the effect “dirigent proteins” exert in the biosynthesis of lignin. In both cases intermediate radicals are formed enzymatically which then must react in a controlled way in follow-up reactions for obtaining the desired products. These follow-up reactions are controlled to some extent by the templates or specific proteins.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Frontiers Media
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
aniline
en_US
dc.subject
enzyme
en_US
dc.subject
lignin
en_US
dc.subject
laccase
en_US
dc.subject
peroxidase
en_US
dc.subject
polymerization
en_US
dc.subject
polyaniline
en_US
dc.subject
template
en_US
dc.title
Synthesizing Polyaniline With Laccase/O-2 as Catalyst
en_US
dc.type
Review Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
Frontiers in Bioengineering and Biotechnology
ethz.journal.volume
7
en_US
ethz.journal.abbreviated
Front. bioeng. biotechnol.
ethz.pages.start
165
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Soft Interfaces as Regulators of Laccase-catalyzed Oligomerization Reactions
en_US
ethz.grant
Conducting polymers synthesized by enzymatic polymerization
en_US
ethz.identifier.wos
ethz.publication.place
Lausanne
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::03763 - Niederberger, Markus / Niederberger, Markus
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02160 - Dep. Materialwissenschaft / Dep. of Materials::03763 - Niederberger, Markus / Niederberger, Markus
ethz.grant.agreementno
150254
ethz.grant.agreementno
152457
ethz.grant.agreementno
150254
ethz.grant.agreementno
152457
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.grant.program
Projektförderung in Mathematik, Natur- und Ingenieurwissenschaften (Abteilung II)
ethz.grant.program
ethz.date.deposited
2019-07-24T02:19:45Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-07-25T10:11:47Z
ethz.rosetta.lastUpdated
2020-02-15T23:47:48Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Synthesizing%20Polyaniline%20With%20Laccase/O-2%20as%20Catalyst&rft.jtitle=Frontiers%20in%20Bioengineering%20and%20Biotechnology&rft.date=2019-07-10&rft.volume=7&rft.spage=165&rft.issn=2296-4185&rft.au=Walde,%20Peter&Kashima,%20Keita&%C4%86iri%C4%87-Marjanovi%C4%87,%20Gordana&rft.genre=article&
 Search via SFX

Files in this item

Thumbnail

Publication type

Show simple item record