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Influence of mesoscopic ordering on the photoexcitation transfer dynamics in supramolecular assemblies of oligo-p-phenylenevinylene
- Source :
-
Chemical Physics Letters . Jan2006, Vol. 418 Issue 1-3, p196-201. 6p. - Publication Year :
- 2006
-
Abstract
- Abstract: We have investigated the influence of molecular arrangement on the transfer rates of photoexcitations along supramolecular assemblies of hydrogen-bonded oligo-p-phenylenevinylene (OPV) molecules for two different packing geometries. For well-defined, helical stacks of monofunctional OPVs fast (≈50ps) photoluminescence depolarization and excitation transfer to dopants was observed, in agreement with semi-coherent exciton diffusion. For disordered assemblies of bifunctional OPVs incorporating a spacer to link adjacent molecules, depolarization and energy transfer dynamics occur on a longer time scale (≈nanosecond). This strongly suggests that such spacers need to be tuned carefully as they may otherwise interfere with the π-stacking thereby reducing the intermolecular electronic coupling. [Copyright &y& Elsevier]
- Subjects :
- *PROPERTIES of matter
*SEMICONDUCTOR doping
*SOLUTION (Chemistry)
*ENERGY storage
Subjects
Details
- Language :
- English
- ISSN :
- 00092614
- Volume :
- 418
- Issue :
- 1-3
- Database :
- Academic Search Index
- Journal :
- Chemical Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 19396787
- Full Text :
- https://doi.org/10.1016/j.cplett.2005.10.105