Synthesis and two-photon absorption property characterizations of small dendritic chromophores containing functionalized quinoxaliniod heterocycles

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题名:	Synthesis and two-photon absorption property characterizations of small dendritic chromophores containing functionalized quinoxaliniod heterocycles
作者:	林子超;Lin, Tzu-Chau;Lee, Ying-Hsuan;Liu, Che-Yu;Huang, Bor-Rong;Tsai, Ming-Yu;Huang, Yu-Jhen;Lin, Ja-Hon;Shen, Yu-Kai;Wu, Cheng-Yu
贡献者:	理學院化學學系
关键词:	Absorption;amination;Broadband;Chemistry;Chromophores;Femtosecond;heterocycles;Lasers;Molecular structure;Nanostructure;nonlinear optics;Quinoxalines;Time domain
日期:	2013-01-07
上传时间:	2026-04-21 14:06:00 (UTC+8)
出版者:	Wiley-VCH Verlag;Weinheim: WILEY-VCH Verlag
摘要:	摘要： A series of star‐shaped multi‐polar chromophores (compounds 1–3) containing functionalized quinoxaline and quinoxalinoid (indenoquinoxaline and pyridopyrazine) units has been synthesized and characterized for their two‐photon absorption (2PA) properties both in the femtosecond and the nanosecond time domain. Under our experimental conditions, these model fluorophores are found to manifest strong and wide‐dispersed two‐photon absorption in the near‐infrared region. It is demonstrated that molecular structures with multi‐branched π frameworks incorporating properly functionalized quinoxalinoid units would possess large molecular nonlinear absorptivities within the studied spectral range. Effective optical‐power attenuation and stabilization behaviors in the nanosecond time domain of a selected representative dye molecule (i.e., compound 2) from this model compound set were also investigated and the results indicate that such structural motif could be a useful approach for the molecular design toward strong two‐photon‐absorbing material systems for quick‐responsive and broadband optical‐suppressing‐related applications, particularly to confront long laser pulses. Catch photons if you can: A series of small dendritic chromophores containing functionalized quinoxaline and quinoxalinoid units has been synthesized and experimentally shown to possess strong and wide‐dispersed two‐photon absorption in the near‐IR region under the irradiation of either femtosecond or nanosecond laser pulses (see figure). It was also demonstrated that such molecular archetype could be promising candidates for optical‐power attenuators and stabilizers against laser pulses with long duration. 其他題名： Chem. Eur. J 出版者： Weinheim: WILEY-VCH Verlag 出版日期： 2013-01-07 出處： Chemistry : a European journal, 2013-01, Vol.19 (2), p.749-760 資源來源： Alma/SFX Local Collection 版權： Copyright © 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim 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: 0947-6539 識別號： ISSN: 1521-3765 識別號： EISSN: 1521-3765 識別號： DOI: 10.1002/chem.201202178 識別號： PMID: 23169324 識別號： CODEN: CEUJED
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