Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Anke Helfer"'
Reliably Estimating the Length of the Effectively Conjugated Segment in Ladder Poly(para-phenylene)s
Publikováno v:
Organic Materials, Vol 02, Iss 02, Pp 159-164 (2020)
Abstract In 1995 we extrapolated the so-called “effective conjugation length” in (para-phenylene) ladder polymers by relating the optical absorption energy to the reciprocal chain length of ladder-type oligo-(para-phenylene)s, but only based on t
Externí odkaz:
https://doaj.org/article/c735a5cce1ec46948967c871104486d7
Reliably Estimating the Length of the Effectively Conjugated Segment in Ladder Poly(para-phenylene)s
Publikováno v:
Organic Materials, Vol 02, Iss 02, Pp 159-164 (2020)
In 1995 we extrapolated the so-called “effective conjugation length” in (para-phenylene) ladder polymers by relating the optical absorption energy to the reciprocal chain length of ladder-type oligo-(para-phenylene)s, but only based on three shor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f65b6869f8deef39b75790283c38eef8
https://doi.org/10.1055/s-0040-1710348
https://doi.org/10.1055/s-0040-1710348
Autor:
Marc Papenheim, Khalid Dhima, Anke Helfer, Hella-Christin Scheer, Patrick Görrn, Andreas Polywka, Christian Steinberg, Si Wang
Publikováno v:
Applied Physics A. 121:357-362
The morphology of highly regular, semi-crystalline P3HT (poly 3-hexylthiophene-2.5-diyl) after thermal nanoimprint is studied and compared to that of its amorphous counterpart. Differential scanning calorimetry measurements of both materials provide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b45df7de67f0c34a65fd74c46e6c1176
https://doi.org/10.1007/s00339-015-9204-2
https://doi.org/10.1007/s00339-015-9204-2
Autor:
Michael Forster, Dörthe Haase, Nils Fröhlich, Anke Helfer, Ullrich Scherf, Mika Torkkeli, Roman Stepanyan, Matti Knaapila
Publikováno v:
Knaapila, M, Stepanyan, R, Torkkeli, M, Haase, D, Fröhlich, N, Helfer, A, Forster, M & Scherf, U 2016, ' Effect of side-chain asymmetry on the intermolecular structure and order-disorder transition in alkyl-substituted polyfluorenes ', Physical Review E, vol. 93, no. 4, 042504 . https://doi.org/10.1103/PhysRevE.93.042504
We study relations among the side-chain asymmetry, structure, and order-disorder transition (ODT) in hairy-rod-type poly(9,9-dihexylfluorene) (PF6) with two identical side chains and atactic poly(9-octyl-9-methyl-fluorene) (PF1-8) with two different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8227765c1d25c91bf690c6e275ddddde
http://hdl.handle.net/10138/185069
http://hdl.handle.net/10138/185069
Publikováno v:
Advanced Materials. 24:681-686
Novel dye-terminated, hyperbranched polytruxenes and polytruxene-block-polythiophene multiblock copolymers have been synthesized in a simple "AB(2) + A" approach. Photoexcitation into the higher energy polytruxene absorption band results in an effici
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d58eb76a6337685a0710fc70ebb8a92
https://doi.org/10.1002/adma.201102993
https://doi.org/10.1002/adma.201102993
Autor:
Logan E. Garner, Anke Helfer, Matti Knaapila, Rachel C. Evans, Ullrich Scherf, Sylwia Adamczyk, Guillermo C. Bazan, Sofia M. Fonseca, Hugh D. Burrows, Andrea Gutacker
Publikováno v:
J. Mater. Chem.. 20:1423-1430
Novel, all-conjugated polyelectrolyte block copolymers of the rod-rod type can be generated in a “grafting from” scheme and exhibit a preferred tendency to self-assemble into layered aggregates both in solution and the solid state. Here, the rigi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6e4e18fc691a6ea2e2741cb839a3e6f
https://doi.org/10.1039/b918583f
https://doi.org/10.1039/b918583f
Publikováno v:
e-Polymers. 10
A series of new π-conjugated donor-acceptor copolymers, based on a naphthalene-bisimide moiety as the electron-acceptor and connected to either thiophene or dialkylfluorene as the electron-donor, were synthesized. The polymers are soluble in common
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6b8f533cfbf0d7511f601eb08575df4
https://doi.org/10.1515/epoly.2010.10.1.774
https://doi.org/10.1515/epoly.2010.10.1.774
Publikováno v:
SPIE Proceedings.
In this manuscript, non-classical nonvertical triplet acceptors are proposed as a promising class of efficient triplet scavengers for future solid-state electrically pumped organic lasers. Triplet excitation scavenging is investigated in polymer film
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f55e6a018ee33f50c0a555960ffe4d91
https://doi.org/10.1117/12.826176
https://doi.org/10.1117/12.826176
Publikováno v:
Chemphyschem : a European journal of chemical physics and physical chemistry. 10(7)
Phosphorescence and delayed fluorescence of polyfluorene polymer films doped with cyclooctatetraene (COT) and anthracene are studied by means of time-resolved photoluminescence (PL) measurements. The occurrence of an anomalous nonvertical triplet ene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::588857de30d333a63e5c8c2bea71c7b9
https://pubmed.ncbi.nlm.nih.gov/19373793
https://pubmed.ncbi.nlm.nih.gov/19373793
Publikováno v:
ACS Symposium Series ISBN: 9780841238572
Polymers for Microelectronics and Nanoelectronics
Polymers for Microelectronics and Nanoelectronics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a3257f5127a8a0aa0270b935afbb805
https://doi.org/10.1021/bk-2004-0874.ch010
https://doi.org/10.1021/bk-2004-0874.ch010