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https://irlib.pccu.edu.tw/handle/987654321/2755
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| Title: | Two-photon absorption chromophores with a tunable [2,2 ']bithiophene core |
| Authors: | Chou, Chia-Feng
Huang, Tai-Hsiang
Lin, Jiann T.
Hsieh, Cheng-chih
Lai, Chin-Hung
Chou, Pi-Tai
Tsai, Chiitang |
| Contributors: | 化學系 |
| Keywords: | two-photon absorption
bithiophene
sonogashira coupling reaction |
| Date: | 2006 |
| Issue Date: | 2009-11-20 11:37:42 (UTC+8) |
| Abstract: | Sonogashira coupling between 3,5,3',5'-tetrabromo-[2,2']bithiophene and various terminal alkynes provides two-photon absorption (TPA) chromophores 1-6, which possess electron donor (D) and/or acceptor (A) alkynyl substituents at 3(3') and 5(5') sites of the bithiophene core. The up-converted fluorescence emission excited at 800 nn (Ti:sapphire femtosecond laser, similar to 100 fs pulses) was used to determine the two-photon absorption cross-sections (Q) of these compounds. The corresponding TPA cross-section (a) values ranging from 132 to 1120 GM (10(-50) cm(4)s photon(-1)) can be fine-tuned by the substitutents. The quadrupolar-type (A-pi-D-pi-A) chromophore 5 exhibits the largest Q value (1120 GM) in CH2Cl2 upon 800 nm excitation. (c) 2006 Elsevier Ltd. All rights reserved |
| Relation: | TETRAHEDRON Volume: 62 Issue: 36 Pages: 8467-8473 |
| Appears in Collections: | [Department of Chemistry & Graduate Institute of Applied Chemistry ] journal articles
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