Synthesis and two-photon absorption properties of star-shaped chromophores derived from functionalized fluorene units

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题名:	Synthesis and two-photon absorption properties of star-shaped chromophores derived from functionalized fluorene units
作者:	林子超;Lin, Tzu-Chau;Liu, Che-Yu;Huang, Bor-Rong;Lin, Ja-Hon;Shen, Yu-Kai;Wu, Cheng-Yu
贡献者:	理學院化學學系
关键词:	Chromophores;Dendrimers;Fluorescence;Lasers;Multibranched pi systems;Nonlinear optics;Two-photon absorption
日期:	2013-01-01
上传时间:	2026-04-21 14:05:14 (UTC+8)
出版者:	Wiley-VCH Verlag;Weinheim: WILEY-VCH Verlag
摘要:	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. 其他題名： Eur. J. Org. Chem 出版者： Weinheim: WILEY-VCH Verlag 出版日期： 2013-01 出處： European journal of organic chemistry, 2013-01, Vol.2013 (3), p.498-508 資源來源： Wiley Online Library - AutoHoldings Journals 版權： Copyright © 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim 版權： Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 識別號： ISSN: 1434-193X 識別號： ISSN: 1099-0690 識別號： EISSN: 1099-0690 識別號： DOI: 10.1002/ejoc.201201236
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