Two-photon absorption and optical power limiting properties in femtosecond regime of novel multi-branched chromophores based on tri-substituted olefinic scaffolds

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/28350

Title:	Two-photon absorption and optical power limiting properties in femtosecond regime of novel multi-branched chromophores based on tri-substituted olefinic scaffolds
Authors:	Lin,TC;Chen,YF;Hu,CL;Hsu,CS
Contributors:	中央大學
Keywords:	CROSS-SECTIONS;PHOTOPHYSICAL PROPERTIES;COOPERATIVE ENHANCEMENT;CONJUGATED DENDRIMERS;ABSORBING CHROMOPHORES;FLUORENE DERIVATIVES;3-PHOTON ABSORPTION;FLUOROPHORES;FLUORESCENCE;MOLECULES
Date:	2009
Issue Date:	2010-06-29 19:46:46 (UTC+8)
Publisher:	化學研究所
Abstract:	Two new multi-branched model fluorophores based on tri-substituted olefinic skeletons had been synthesized and their degenerate two-photon absorption properties were characterized by ultra-short laser pulses in the femtosecond regime. The experimental results show that the studied chromophore structures exhibit relatively strong and wide-dispersed two-photon activities in the near infra-red (NIR) regime. It is demonstrated that molecular structures with expanded pi-frameworks derived from multi-substituted olefin moieties would possess large molecular nonlinear absorptivities within the studied spectral region. Two-photon absorption based optical power limiting behaviors in the femtosecond time domain of these model compounds were also explored and the results indicate that such a structural motif could be a useful molecular design approach towards strong two-photon absorbing material systems for quick-responsive and broadband optical-suppressing related applications, especially when against ultra-short laser pulses.
Relation:	JOURNAL OF MATERIALS CHEMISTRY
Appears in Collections:	[Graduate Institute of Chemistry] journal & Dissertation

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