dc.contributor.author
Naumann, Stefan
dc.contributor.author
Klein, Johannes
dc.contributor.author
Wang, Dongren
dc.contributor.author
Buchmeiser, Michael R.
dc.date.accessioned
2018-06-08T03:35:45Z
dc.date.available
2015-12-14T07:09:17.657Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/15512
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-19700
dc.description.abstract
The polymerization of octamethylcyclotetrasiloxane (D4) is investigated using
several five-, six- and seven-membered N-heterocyclic carbenes (NHCs). The
catalysts are delivered in situ from thermally susceptible CO2 adducts. It is
demonstrated that the polymerization can be triggered from a latent state by
mild heating, using the highly nucleophilic
1,3,4,5-tetramethylimidazol-2-ylidene as organocatalyst. This way, high
molecular weight PDMS is prepared (up to >400 000 g/mol, 1.6 < ÐM < 2.5) in
yields >95%, using low catalyst loadings (0.2–0.1 mol %). Furthermore, the
results suggest that a nucleophilic, zwitterionic mechanism is in operation,
in preference to purely anionic polymerization.
en
dc.rights.uri
http://creativecommons.org/licenses/by/2.0/
dc.subject
N-heterocyclic carbenes
dc.subject
ring-opening organocatalysis
dc.subject
polymerization
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie
dc.title
Convenient preparation of high molecular weight poly(dimethylsiloxane) using
thermally latent NHC-catalysis
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Beilstein Journal of Organic Chemistry. - 11 (2015), S. 2261-2266
dc.title.subtitle
a structure-activity correlation
dcterms.bibliographicCitation.doi
10.3762/bjoc.11.246
dcterms.bibliographicCitation.url
http://www.beilstein-journals.org/bjoc/single/articleFullText.htm?publicId=1860-5397-11-246
refubium.affiliation
Biologie, Chemie, Pharmazie
de
refubium.mycore.fudocsId
FUDOCS_document_000000023595
refubium.note.author
Der Artikel wurde in einer Open-Access-Zeitschrift publiziert.
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000005764
dcterms.accessRights.openaire
open access