| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5219418 | Tetrahedron | 2012 | 15 Pages |
A set of novel multi-branched chromophores composed of four analogues with generic skeletons of donor-Ï-acceptor (D-Ï-A) derived from functionalized fluorene/oxadiazole moieties has been synthesized and experimentally shown to possess strong and wide-dispersed two-photon absorptivities in near infrared (NIR) region under the irradiation of femtosecond laser pulses. It is demonstrated that structural parameters, such as the size of Ï-framework and the number of electron-donating units attached are closely connected to the molecular two-photon activities of these model compounds. Effective optical power-attenuation behaviors in the nanosecond time domain of the studied chromophores were also investigated and the results indicate that such dye molecules can be potential materials as broadband and quick-responsive optical-limiters especially against those laser lights with longer pulses.
Graphical abstractDownload full-size imageA novel unsymmetrical chromophore set containing four fluorene/oxadiazole-based analogues were synthesized and experimentally shown to possess ascending two-photon absorptivities with the growth of their Ï-system. On the other hand, the observed effective optical power-suppression behaviors in the nanosecond time domain of the studied chromophores indicate that such dye molecules can be potential materials as broadband and quick-responsive optical-limiters especially against those laser lights with longer pulses.
