摘要： A set of novel multi-branched chromophores composed of four analogues with generic skeletons of donor-π-acceptor (D-π-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 π-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. [Display omitted] A 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 π-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. 出版者： Kidlington: Elsevier Ltd 出版日期： 2012-06-24 出處： Tetrahedron, 2012-06, Vol.68 (25), p.4935-4949 版權： 2012 Elsevier Ltd 版權： 2015 INIST-CNRS 識別號： ISSN: 0040-4020 識別號： EISSN: 1464-5416 識別號： DOI: 10.1016/j.tet.2012.04.073 識別號： CODEN: TETRAB
