Synthesis and two-photon property studies of symmetrically substituted bisarylacetylene structures using functionalized quinoxalinoid units as the aryl substituents

Tzu Chau Lin, Yi You Liu, May Hui Li, Ying Hsuan Lee

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A series of symmetrically substituted multi-polar chromophores (1-3) based on the skeleton of bisarylacetylene using functionalized quinoxaline, indenoquinoxaline, and pyridopyrazine moieties as the aryl substituents has been synthesized and characterized for their two-photon absorption properties using femtosecond laser pulses as the probing tool. Under our experimental conditions, these model fluorophores are found to manifest strong and wide dispersed two-photon absorption in the near infrared (NIR) region. It is demonstrated that molecular structures with multi-branched π-frameworks incorporating functionalized quinoxalinoid units would possess large molecular nonlinear absorptivities within the studied spectral range. Optical power-limiting behavior in the femtosecond time domain of the indenoquinoxaline-derived dye molecule (2) from this model compound set was also investigated and the result indicates that such structural motif could be a useful approach for the molecular design towards strong two-photon absorbing material system for quick-responsive and broadband optical-control related applications.

Original languageEnglish
Pages (from-to)72-80
Number of pages9
JournalDyes and Pigments
Volume109
DOIs
StatePublished - Oct 2014

Keywords

  • Indenoquinoxaline
  • Optical power-limiting
  • Pyridopyrazine
  • Quinoxaline
  • Sonogashira reaction
  • Two-photon absorption

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