Results 151 to 160 of about 3,082 (195)

Photoluminescence of Self‐organized Perylene Bisimide Polymers

Macromolecular Chemistry and Physics, 2004
AbstractSummary: Three polymers consisting of alternating perylene bisimide chromophores and flexible polytetrahydrofuran segments of different length have been studied using absorption and (time‐resolved) photoluminescence spectroscopy. In o‐dichlorobenzene, the chromophores self organize to form H‐like aggregates. The photoluminescence spectra of the
Neuteboom, E.E., Meskers, S.C.J., Meijer, E.W., Janssen, R.A.J.   +3 more
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Ambient Stable Zwitterionic Perylene Bisimide‐Centered Radical

Angewandte Chemie, 2014
AbstractThe unexpected introduction of a cationic imidazolium substituent in the 2‐position of a tetrachloro‐substituted perylene‐3,4:9,10‐tetracarboxylic acid bisimide (PBI) by the reaction of PBI‐Cl41with the N‐heterocyclic carbene 1,3‐di‐iso‐propyl‐imidazolin‐2‐ylidene (iPr2Im2) enables the isolation of an ambient stable zwitterionic radical.
David, Schmidt, David, Bialas, Frank, Würthner   +2 more
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Aggregation Processes of Perylene Bisimide Diimidazolium Salts

Chemistry – A European Journal, 2015
AbstractThe supramolecular aggregation of three diimidazolium‐functionalized perylene bisimides, differing in the alkyl chain length was investigated. These salts form aggregates in solvents like chloroform, dichloromethane, and glycerol. Solvent‐, concentration‐, and temperature‐dependent spectroscopic studies were carried out, evidencing the ...
Francesca, D'Anna, Salvatore, Marullo, Giuseppe, Lazzara, Paola, Vitale, Renato, Noto   +4 more
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Exciton Migration in Multistranded Perylene Bisimide J-Aggregates

The Journal of Physical Chemistry Letters, 2020
Exciton migration in self-assembled supramolecular ensembles of dye molecules is controlled by the electronic coupling between adjacent sites, the delocalization of the excitation and thereby by the packing arrangement. Here, we put emphasis on the packing structure and analyze the exciton migration in two perylene bisimide-based J-aggregates composed ...
Chris Rehhagen, Matthias Stolte, Stefanie Herbst, Markus Hecht, Stefan Lochbrunner, Frank Würthner, Franziska Fennel   +6 more
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Energy Migration in Dendritic Oligothiophene-Perylene Bisimides

The Journal of Physical Chemistry B, 2012
A series of novel oligothiophene-perylene bisimide hybrid (DOTPBI) dendrimers up to the second generation (G0, G1, and G2) were investigated. Optical measurements such as nonlinear optical and time-resolved spectroscopy, including two-photon absorption, fluorescence upconversion, and excited state transient absorption were carried out. Results of these
Jin, Zhang, Markus K R, Fischer, Peter, Bäuerle, Theodore, Goodson   +3 more
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Luminescent one-dimensional nanostructures of perylene bisimides

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2013
Perylene bisimides form a unique class of organic semiconductors, in this investigation two symmetrical perylene bisimides caped with 1-butyl (B-PTCDI) and 4,4-diethoxybutyl (DB-PTCDI) have been synthesized and characterized. The compounds self-assembled as a network of nanobelts and nanorods in the solution based self-assembly process. Morphologies of
G, Boobalan, P K M, Imran, S, Nagarajan
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Fabrication of luminescent perylene bisimide nanorods

Journal of Luminescence, 2014
Abstract Perylene bisimides have attracted great interest as a result of their unique electrical and photophysical properties. In the present investigation a N,N′-bis(2-naphthalene-2-yl)perylene-3,4,9,10-tetracarboxylic diimide was synthesized from 2-aminonaphthalene and perylene-3,4,9,10-tetracarboxylic dianhydride.
Gopal Boobalan, Predhanekar Mohamed Imran, S.G. Ramkumar, Samuthira Nagarajan   +3 more
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Bay Region Borylation of Perylene Bisimides

European Journal of Organic Chemistry, 2011
AbstractNovel bispinacolborane‐N,N′‐bis(octyl)‐3,4,9,10‐perylenetetracarboxylic acid bisimide (PBI) was synthesized in high yield. The title compound is a key intermediate in the preparation of PBI aryl derivatives through Suzuki cross‐coupling by using a large variety of easily accessible aryl halides.
Efimov Alexander, Lemmetyinen Helge, Dey Somnath   +2 more
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Perylene Bisimide Atropisomers:  Synthesis, Resolution, and Stereochemical Assignment

The Journal of Organic Chemistry, 2007
The macrocyclization of the tetra-hydroxyphenoxy-substituted perylene bisimide 4 bearing two (R)-configured 2-octyl substituents in the imide positions by etherification with diethylene glycol ditosylate afforded both the diagonally bridged (1,7- and 6,12-linkage) and laterally bridged (1,12- and 6,7-linkage) regioisomers 6 and 7.
Peter, Osswald, Matthias, Reichert, Gerhard, Bringmann, Frank, Würthner   +3 more
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One-Dimensional Exciton Diffusion in Perylene Bisimide Aggregates

The Journal of Physical Chemistry A, 2010
The dynamics and mobility of excitons in J-aggregates of perylene bisimides are investigated by transient absorption spectroscopy with a time resolution of 50 fs. The transient spectra are compatible with an exciton delocalization length of two monomers and indicate that vibrational and configurational relaxation processes are not relevant for the ...
Henning, Marciniak, Xue-Qing, Li, Frank, Würthner, Stefan, Lochbrunner   +3 more
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