Details
| Original language | English |
|---|---|
| Pages (from-to) | 4596-4602 |
| Number of pages | 7 |
| Journal | Journal of Physical Chemistry B |
| Volume | 105 |
| Issue number | 20 |
| Publication status | Published - 26 Apr 2001 |
| Externally published | Yes |
Abstract
Absorption and fluorescence were investigated for liquid-crystalline discotics, which are characterized by the spontaneous formation of one-dimensional columnar structures in the fluid phase. Such materials have been considered for applications in organic light-emitting diodes and as photoconductors. We investigated materials based on asymmetrically substituted triphenylenes displaying a novel highly ordered plastic columnar state. These materials show an unexpected time dependence of the fluorescence spectrum during irradiation apparently because of their specific spatial structure. Transfer of energy from a high-energy excited state to a newly developing lower-energy state takes place. We attribute the evolution of this state to the particular spatial arrangement of the molecules within the columns in the plastic columnar state. This causes the photoinduced formation of dimers, a process that is absent in solutions and in polymer-dispersed systems of discotic materials and that has, so far, not been documented in the literature.
ASJC Scopus subject areas
- Chemistry(all)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Journal of Physical Chemistry B, Vol. 105, No. 20, 26.04.2001, p. 4596-4602.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Time-resolved fluorescence in 3-dimensional ordered columnar discotic materials
AU - Bayer, A.
AU - Hübner, Jens
AU - Kopitzke, J.
AU - Oestreich, Michael
AU - Rühle, W.
AU - Wendorff, J. H.
PY - 2001/4/26
Y1 - 2001/4/26
N2 - Absorption and fluorescence were investigated for liquid-crystalline discotics, which are characterized by the spontaneous formation of one-dimensional columnar structures in the fluid phase. Such materials have been considered for applications in organic light-emitting diodes and as photoconductors. We investigated materials based on asymmetrically substituted triphenylenes displaying a novel highly ordered plastic columnar state. These materials show an unexpected time dependence of the fluorescence spectrum during irradiation apparently because of their specific spatial structure. Transfer of energy from a high-energy excited state to a newly developing lower-energy state takes place. We attribute the evolution of this state to the particular spatial arrangement of the molecules within the columns in the plastic columnar state. This causes the photoinduced formation of dimers, a process that is absent in solutions and in polymer-dispersed systems of discotic materials and that has, so far, not been documented in the literature.
AB - Absorption and fluorescence were investigated for liquid-crystalline discotics, which are characterized by the spontaneous formation of one-dimensional columnar structures in the fluid phase. Such materials have been considered for applications in organic light-emitting diodes and as photoconductors. We investigated materials based on asymmetrically substituted triphenylenes displaying a novel highly ordered plastic columnar state. These materials show an unexpected time dependence of the fluorescence spectrum during irradiation apparently because of their specific spatial structure. Transfer of energy from a high-energy excited state to a newly developing lower-energy state takes place. We attribute the evolution of this state to the particular spatial arrangement of the molecules within the columns in the plastic columnar state. This causes the photoinduced formation of dimers, a process that is absent in solutions and in polymer-dispersed systems of discotic materials and that has, so far, not been documented in the literature.
UR - http://www.scopus.com/inward/record.url?scp=0035942926&partnerID=8YFLogxK
U2 - 10.1021/jp003505k
DO - 10.1021/jp003505k
M3 - Article
AN - SCOPUS:0035942926
VL - 105
SP - 4596
EP - 4602
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1089-5647
IS - 20
ER -