摘要： 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. [Display omitted] •A series of symmetrically substituted multi-polar chromophores based on the skeleton of bisarylacetylene has been synthesized.•These model fluorophores are found to manifest strong and wide dispersed two-photon absorption in the near infrared (NIR) region.•Optical power-limiting behavior of a selected representative dye molecule is demonstrated. 出版者： Elsevier Ltd 出版日期： 2014-10-01 出處： Dyes and pigments, 2014-10, Vol.109, p.72-80 版權： 2014 Elsevier Ltd 識別號： ISSN: 0143-7208 識別號： EISSN: 1873-3743 識別號： DOI: 10.1016/j.dyepig.2014.04.035
