Synthesis and Characterization of Two‐Photon Chromophores Based on a Tetrasubstituted Tetraethynylethylene Scaffold |
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| Authors: | Prof Tzu‐Chau Lin Yi‐You Liu May‐Hui Li Che‐Yu Liu Sheng‐Yang Tseng Yu‐Ting Wang Ya‐Hsin Tseng Hui‐Hsin Chu Prof Chih‐Wei Luo |
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| Institution: | 1. Photonic Materials Research Laboratory, Department of Chemistry, National Central University, 300 Jong‐da Rd. 32001 Jhong‐Li (Taiwan), Fax: (+886)?3‐4227664;2. Department of Electrophysics, National Chiao‐Tung University, Hsinchu (Taiwan) |
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| Abstract: | A new series of model dye molecules composed of three multibranched analogues based on the tetrasubstituted tetraethynylethylene structural motif have been synthesized and experimentally shown to possess strong and widely dispersed two‐photon absorption (2PA) in the near‐IR region. It was found that the spectral position of the major 2PA band could be tuned by the electronic nature of the selected substitution units. The studied model fluorophores also exhibited fairly low photodegradation of their fluorescence intensity even under prolonged UV‐light irradiation, which is beneficial for the development of fluorescence probes that are needed for long‐term light exposure. Furthermore, representative chromophores were selected to demonstrate the power‐control properties within the femtosecond and nanosecond time domains. |
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| Keywords: | absorption chromophores heterocycles nonlinear optics Sonogashira reaction |
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