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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/72872

    Title: Two-photon Property Studies of Novel Chromophores with Various Heterocyclic Structural Units
    Authors: 芮可凡;Amini, Rekfa Wika
    Contributors: 化學學系
    Keywords: Two-photon absorption;thiophene;anthracene;quinoxaline;triazine;pyrazine;two-photon-induced fluorescence;Two-photon absorption;thiophene;anthracene;quinoxaline;triazine;pyrazine;two-photon-induced fluorescence
    Date: 2017-03-07
    Issue Date: 2017-05-05 17:10:47 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本篇論文係利用雙光子激發螢光技術,對含噻吩(thiophene)、蒽(anthracene)、吡嗪(pyrazine)、喹喔啉(quinoxaline)、三嗪(triazine)等數種新穎雜環構造單元之染料分子系統進行量測其雙光子吸收性質並探討分子結構與非線性光學性質之關聯性。總體來說,我們發現下列幾種結構要素與分子的雙光子吸收性質有密切關聯:
    ;Several novel chromophore systems with various heterocyclic structural units including thiophene, anthracene, pyrazine, quinoxaline, and triazine were designed and synthesized to investigate the relationship between molecular structure and their linear/non-linear optical properties. The two-photon absorption (2PA) spectra of the studied compounds were measured by two-photon-excited fluorescence (2PEF) technique. Overall, we have found the following molecular parameters that are closely related to the enhancement of molecular 2PA:
    1. Electron-donor strength;
    2. π-conjugation length;
    3. Coplanarity of the structure
    In our chromophore systems, we have observed that diphenylamine is a superior electron-donor compared to naphthylamine. Moreover, it is noted that extending the π-conjugation length by insertion of carbon-carbon triple bond, or vinyl, or anthracene unit, or phenyl unit are useful strategies to promote the molecular 2PA. In addition, it is revealed that the coplanarity of the structure plays a crucial role for the extent of the 2PA enhancement.
    Appears in Collections:[化學研究所] 博碩士論文

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