Nanoparticles of low optical band gap conjugated polymers


Dateien zu dieser Ressource

Prüfsumme: MD5:95fc0792d5c2f1419f82fbb216e4289b

HUBER, Johannes, Christoph JUNG, Stefan MECKING, 2012. Nanoparticles of low optical band gap conjugated polymers. In: Macromolecules. 45(19), pp. 7799-7805. ISSN 0024-9297. eISSN 1520-5835

@article{Huber2012Nanop-20830, title={Nanoparticles of low optical band gap conjugated polymers}, year={2012}, doi={10.1021/ma3013459}, number={19}, volume={45}, issn={0024-9297}, journal={Macromolecules}, pages={7799--7805}, author={Huber, Johannes and Jung, Christoph and Mecking, Stefan} }

<rdf:RDF xmlns:rdf="" xmlns:bibo="" xmlns:dc="" xmlns:dcterms="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:rights>deposit-license</dc:rights> <dc:language>eng</dc:language> <dc:contributor>Huber, Johannes</dc:contributor> <dc:creator>Mecking, Stefan</dc:creator> <dcterms:available rdf:datatype="">2013-08-31T22:25:05Z</dcterms:available> <dcterms:issued>2012</dcterms:issued> <dc:date rdf:datatype="">2012-11-14T11:12:51Z</dc:date> <dcterms:abstract xml:lang="eng">Sonogashira coupling of 9,9-bis(2-ethylhexyl)-2,7-diethynyl-9H-fluorene (1) with 2,7-dibromo-9,9-bis(2-ethylhexyl)-9H-fluorene (2) and dibromo-substituted electron accepting arylenes 5,7-bis(5-bromothiophen-2-yl)-2,3-dihexylthieno[3,4-b]pyrazine (3), 4,7-bis(5-bromo-4-(2-ethylhexyl)thiophene-2-yl)bis(benzothiadiazole) (4) or 4,9-bis(5-bromo-4-(2-ethylhexyl)thiophen-2-yl)-6,7-dihexylthiadiazolo[3,4-g]quinoxaline (5), respectively, in a miniemulsion polymerization process afforded colloidally stable dispersions of poly(arylene ethynylene) nanoparticles with an average size in the range of 50 to 120 nm. For these poly[(1-alt-(2-co-X)] (X = 3, 4, or 5), poly(1-alt-3), poly(1-alt-4), and poly(1-alt-5) aqueous nanoparticle dispersions absorption occurs increasingly in the red and NIR regime with increasing incorporation of acceptor monomer, with a strong absorption up to λabs = 1 μm for poly(1-alt-4) dispersions. For poly[1-alt-(2-co-3)] nanoparticles fluorescence is also observed at λem = ca. 700 nm, which occurs at this long wavelength exclusively even at an incorporation of only 1 mol % of 3 due to energy transfer to the low-energy chromophores. An alternative postpolymerization approach by change of solvent quality yielded dilute aqueous dispersions of self-stabilized nanoparticles from an amphiphilic block copolymer, poly(ethylene glycol)-block-poly(1-alt-6)-block-poly(ethylene glycol) generated from alkyne-terminated poly(1-alt-6) via azide–alkyne coupling (6 = 4,7-bis(5-bromo-4-(2-ethylhexyl)thiophene-2-yl)benzothiadiazole), which fluoresce at λem max = 672 nm.</dcterms:abstract> <dcterms:bibliographicCitation>Macromolecules ; 45 (2012), 19. - S. 7799–7805</dcterms:bibliographicCitation> <dcterms:rights rdf:resource=""/> <dc:contributor>Mecking, Stefan</dc:contributor> <dcterms:title>Nanoparticles of low optical band gap conjugated polymers</dcterms:title> <dc:creator>Huber, Johannes</dc:creator> <bibo:uri rdf:resource=""/> <dc:creator>Jung, Christoph</dc:creator> <dc:contributor>Jung, Christoph</dc:contributor> </rdf:Description> </rdf:RDF>

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

huber_208306.pdf 201

Das Dokument erscheint in:

KOPS Suche


Mein Benutzerkonto