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A set of symmetrically substituted multibranched chromophores composed of three quinoxaline‐based congeners has been synthesized and experimentally shown to possess strong and widely dispersed two‐photon absorptivities in the visible to near‐IR region under the irradiation of femtosecond and nanosecond laser pulses. The electronic properties of the central π bridges incorporated into the final structures are closely connected to the molecular two‐photon activities of these model compounds. Effective optical‐power attenuation and stabilization behaviors in the nanosecond time domain of these dye molecules were also investigated. The structural motif of these compounds provides a useful approach for the molecular design of strong two‐photon absorbing material systems with the potential for quick‐responsive and broadband optical‐control related applications, particularly for long‐duration laser pulses in the near‐IR region.
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Lin et al. (2013) studied this question.
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