Two-photon absorption and effective optical power-limiting properties of small dendritic chromophores derived from functionalized fluorene/oxadiazole units

Tzu Chau Lin, Ying Hsuan Lee, Bor Rong Huang, Chia Ling Hu, Yu Kai Li

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)4935-4949
Number of pages15
JournalTetrahedron
Volume68
Issue number25
DOIs
StatePublished - 24 Jun 2012

Keywords

  • Dendritic structure
  • Fluorene
  • Optical power-limiting
  • Oxadiazole
  • Two-photon absorption
  • Two-photon-excited fluorescence

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