Two-photon absorption and effective optical power-limiting properties of small dendritic chromophores derived from functionalized fluorene/oxadiazole units

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/100281

Title:	Two-photon absorption and effective optical power-limiting properties of small dendritic chromophores derived from functionalized fluorene/oxadiazole units
Authors:	林子超;Lin, Tzu-Chau;Lee, Ying-Hsuan;Huang, Bor-Rong;Hu, Chia-Ling;Li, Yu-Kai
Contributors:	理學院化學學系
Keywords:	absorption;Absorptivity;Applied sciences;Broadband;chemical reactions;chemical structure;Chemistry;Chromophores;Condensed benzenic and aromatic compounds;Dendritic structure;Exact sciences and technology;Femtosecond;Fluorene;Heterocyclic compounds;Heterocyclic compounds with n hetero atom and also o and/or s, se, te hetero atoms;Infrared;irradiation;Lasers;Optical power-limiting;Optical properties;Organic chemistry;organic compounds;Organic polymers;Oxadiazole;Oxadiazoles;Physicochemistry of polymers;Polymers with particular structures;Preparation, kinetics, thermodynamics, mechanism and catalysts;Preparations and properties;Two-photon absorption;Two-photon-excited fluorescence
Date:	2012-06-24
Issue Date:	2026-04-21 13:56:14 (UTC+8)
Publisher:	Elsevier Ltd.;Kidlington: Elsevier Ltd
Abstract:	摘要： A set of novel multi-branched chromophores composed of four analogues with generic skeletons of donor-π-acceptor (D-π-A) derived from functionalized fluorene/oxadiazole moieties has been synthesized and experimentally shown to possess strong and wide-dispersed two-photon absorptivities in near infrared (NIR) region under the irradiation of femtosecond laser pulses. It is demonstrated that structural parameters, such as the size of π-framework and the number of electron-donating units attached are closely connected to the molecular two-photon activities of these model compounds. Effective optical power-attenuation behaviors in the nanosecond time domain of the studied chromophores were also investigated and the results indicate that such dye molecules can be potential materials as broadband and quick-responsive optical-limiters especially against those laser lights with longer pulses. [Display omitted] A novel unsymmetrical chromophore set containing four fluorene/oxadiazole-based analogues were synthesized and experimentally shown to possess ascending two-photon absorptivities with the growth of their π-system. On the other hand, the observed effective optical power-suppression behaviors in the nanosecond time domain of the studied chromophores indicate that such dye molecules can be potential materials as broadband and quick-responsive optical-limiters especially against those laser lights with longer pulses. 出版者： Kidlington: Elsevier Ltd 出版日期： 2012-06-24 出處： Tetrahedron, 2012-06, Vol.68 (25), p.4935-4949 版權： 2012 Elsevier Ltd 版權： 2015 INIST-CNRS 識別號： ISSN: 0040-4020 識別號： EISSN: 1464-5416 識別號： DOI: 10.1016/j.tet.2012.04.073 識別號： CODEN: TETRAB
Appears in Collections:	[Department of Chemistry] journal & Dissertation

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