Journal ArticleDOI
Self-organization of supramolecular helical dendrimers into complex electronic materials
Virgil Percec,Martin Glodde,Tushar K. Bera,Yoshiko Miura,Irina Shiyanovskaya,Kenneth D. Singer,Venkatachalapathy S. K. Balagurusamy,Paul A. Heiney,Ingo Schnell,Almut Rapp,Hans Wolfgang Spiess,Steven D. Hudson,H. Duan +12 more
Reads0
Chats0
TLDR
This work finds that attaching conducting organic donor or acceptor groups to the apex of the dendrons leads to supramolecular nanometre-scale columns that contain in their cores π-stacks of donors, acceptors or donor–acceptor complexes exhibiting high charge carrier mobilities.Abstract:
The discovery of electrically conducting organic crystals1 and polymers1,2,3,4 has widened the range of potential optoelectronic materials5,6,7,8,9, provided these exhibit sufficiently high charge carrier mobilities6,7,8,9,10 and are easy to make and process. Organic single crystals have high charge carrier mobilities but are usually impractical11, whereas polymers have good processability but low mobilities1,12. Liquid crystals exhibit mobilities approaching those of single crystals and are suitable for applications13,14,15,16,17,18, but demanding fabrication and processing methods limit their use. Here we show that the self-assembly of fluorinated tapered dendrons can drive the formation of supramolecular liquid crystals with promising optoelectronic properties from a wide range of organic materials. We find that attaching conducting organic donor or acceptor groups to the apex of the dendrons leads to supramolecular nanometre-scale columns that contain in their cores π-stacks of donors, acceptors or donor–acceptor complexes exhibiting high charge carrier mobilities. When we use functionalized dendrons and amorphous polymers carrying compatible side groups, these co-assemble so that the polymer is incorporated in the centre of the columns through donor–acceptor interactions and exhibits enhanced charge carrier mobilities. We anticipate that this simple and versatile strategy for producing conductive π-stacks of aromatic groups, surrounded by helical dendrons, will lead to a new class of supramolecular materials suitable for electronic and optoelectronic applications.read more
Citations
More filters
Journal Article
Frustrated self-assembly of dendron and dendrimer-based supramolecular liquid crystals
Raffaele Mezzenga,Nadia Canilho,Janne Ruokolainen,Edis Kasëmi,Dieter Schlueter,Won Bo Lee,Glenn H. Fredrickson +6 more
TL;DR: In this paper, a new topological configuration for self-assembled dendron and dendrimer-based supramolecular liquid crystals was demonstrated both experimentally and theoretically.
Journal ArticleDOI
Excited-State Structure Modifications Due to Molecular Substituents and Exciton Scattering in Conjugated Molecules
TL;DR: Effective tight-binding models are implemented as a tool to examine the analytical properties of the exciton scattering matrices in semi-infinite polymer chains with substitutions and it is demonstrated that chemical interactions between the substitution and attached polymer are adequately described by the analytical Properties of the scatteringMatrices.
Cucurbiturils in microscopic complexes and cooperative host-host systems
TL;DR: Kaifer et al. as discussed by the authors studied the formation of inclusion complexes between the cucurbit[7]uril host and a cationic guest containing ferrocenylmethyl and adamantyl residues connected to an ammonium nitrogen.
Partially fluorinated polycyclic aromatic compounds: synthesis and supram olecular behavior
TL;DR: In this article, the supramolecular behavior of fused polycyclic aromatic compounds with partial peripheral fluorination was studied and it was shown that columnar liquid crystalline behavior can be achieved through variations of the alkyl substituents on the molecule.
Journal ArticleDOI
Synthesis and characterization of dendronized side chain liquid crystalline Poly(2-oxazoline)s towards biomimetic ion channels
TL;DR: In this article , the synthesis of a family of side chain liquid crystalline poly(2-oxazoline)s, poly(3,4,5-tris(4-dodecyloxybenzyloxy)phenyl), by cationic ring-opening polymerization (CROP), was reported.
References
More filters
Journal ArticleDOI
Two-dimensional charge transport in self-organized, high-mobility conjugated polymers
Henning Sirringhaus,Peter J. Brown,Richard H. Friend,Martin Nielsen,Klaus Bechgaard,B.M.W. Langeveld-Voss,A. J. H. Spiering,René A. J. Janssen,E. W. Meijer,P. T. Herwig,Dago M. de Leeuw +10 more
TL;DR: In this article, the authors used thin-film, field effect transistor structures to probe the transport properties of the ordered microcrystalline domains in the conjugated polymer poly(3-hexylthiophene), P3HT.
Journal ArticleDOI
Selective recognition of methylated lysine 9 on histone H3 by the HP1 chromo domain.
Andrew J. Bannister,Philip Zegerman,Janet F. Partridge,Eric A. Miska,Jean O. Thomas,Robin C. Allshire,Tony Kouzarides +6 more
TL;DR: A stepwise model for the formation of a transcriptionally silent heterochromatin is provided: SUV39H1 places a ‘methyl marker’ on histone H3, which is then recognized by HP1 through its chromo domain, which may also explain the stable inheritance of theheterochromatic state.
Journal ArticleDOI
Regulation of chromatin structure by site-specific histone H3 methyltransferases
Stephen Rea,Frank Eisenhaber,Dónal O'Carroll,Brian D. Strahl,Zu-Wen Sun,Manfred Schmid,Susanne Opravil,Karl Mechtler,Chris P. Ponting,C D Allis,Thomas Jenuwein +10 more
TL;DR: A functional interdependence of site-specific H3 tail modifications is revealed and a dynamic mechanism for the regulation of higher-order chromatin is suggested.
Journal ArticleDOI
Integrated Optoelectronic Devices Based on Conjugated Polymers
TL;DR: An all-polymer semiconductor integrated device is demonstrated with a high-mobility conjugated polymer field-effect transistor driving a polymer light-emitting diode (LED) of similar size, which represents a step toward all- polymer optoelectronic integrated circuits such as active-matrix polymer LED displays.
Journal ArticleDOI
Self-Organized Discotic Liquid Crystals for High-Efficiency Organic Photovoltaics
Lukas Schmidt-Mende,Andreas Fechtenkötter,Klaus Müllen,Ellen Moons,Richard H. Friend,J. D. MacKenzie +5 more
TL;DR: Self-organization of liquid crystalline and crystalline-conjugated materials has been used to create, directly from solution, thin films with structures optimized for use in photodiodes, demonstrating that complex structures can be engineered from novel materials by means of simple solution-processing steps and may enable inexpensive, high-performance, thin-film photovoltaic technology.