In:
Journal of Nonlinear Optical Physics & Materials, World Scientific Pub Co Pte Ltd, Vol. 09, No. 04 ( 2000-12), p. 469-480
Abstract:
Bis-(diphenylamino)diphenylpolyenes form exceptionally stable, highly absorbing, bipolaronic charge states when oxidatively doped in solution, even at the stilbene level. These chromophores also display exceptionally large two-photon absorption cross-sections for ns laser pulses. 1,2-Bis-(diphenylamino)-E-stilbene moieties have now been incorporated into 3-arm and four-arm dendrimer structures as formal repeat units. These new G-0 model dendrimers also form exceptionally stable, highly-absorbing bipolaronic charge states when oxidized in solution. As such these new materials are attractive candidates for various photonic applications which depend on the fast photogeneration of highly absorbing transient states. In the current study we have demonstrated that such states can indeed be photogenerated from the model dendrimers in solution in the presence of efficient electron acceptors, such as C 60 . In order to follow both the generation and decay of these excited state transient species, new spectroscopic techniques have been developed that have unique capabilities for examining transient state formation and subsequent dynamics.
Type of Medium:
Online Resource
ISSN:
0218-8635
,
1793-6624
DOI:
10.1142/S0218863500000352
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2000
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