摘要
A set of small star-shaped chromophores composed of three fluorene-based congeners have been synthesized and shown experimentally 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. In addition, the number of electron-donating fluorenyl units incorporated in the final structure was closely connected to the molecular two-photon activities of these model compounds. Effective optical power attenuation and stabilization behaviors of these dye molecules in the nanosecond time domain were also investigated. The results indicate that such a structural motif could be useful in the molecular design of strong two-photon absorbing material systems for quick-responding and broadband optical suppressing-related applications, particularly for laser pulses with long durations in the near-IR region. A set of star-shaped chromophores containing functionalized fluorene units were synthesized and shown to possess ascending two-photon absorptivities with the growth of their π systems. The observed effective optical power-limiting and stabilization behaviors in the nanosecond time domain indicate that these dye molecules have potential as broadband and quick-responding optical limiters.
原文 | ???core.languages.en_GB??? |
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頁(從 - 到) | 498-508 |
頁數 | 11 |
期刊 | European Journal of Organic Chemistry |
發行號 | 3 |
DOIs | |
出版狀態 | 已出版 - 1月 2013 |