Synthesis and multi-photon absorption properties of symmetric bisarylacetylene chromophores using functionalized isomeric pyrazinoindenocarbazole units as the rigid aryl substituents
| Autor: | Bo Kai Tsai, Wei Chien, Tzu Chau Lin, Jhe Yi Lin, Nai Yi Liang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Process Chemistry and Technology
General Chemical Engineering Aryl 02 engineering and technology Conjugated system Chromophore Nanosecond 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Fluorescence Two-photon absorption 0104 chemical sciences chemistry.chemical_compound chemistry Excited state Femtosecond 0210 nano-technology |
| Zdroj: | Dyes and Pigments. 132:347-359 |
| ISSN: | 0143-7208 |
| DOI: | 10.1016/j.dyepig.2016.05.023 |
| Popis: | A pair of isomeric chromophores based on the skeleton of bisarylacetylene using functionalized pyrazinoindenocarbazole moieties as the aryl substituents has been synthesized and characterized for their two- and three-photon-related properties in the femtosecond and nanosecond regimes. Our experiments have found that both model fluorophores manifest strong two-photon absorption in the near infrared region with one of the isomers exhibiting superior maximum two-photon absorptivity. It is realized that both the isomeric forms of functionalized pyrazinoindenocarbazoles are useful π-units for the construction of highly two-photon active materials but the effectiveness of the units is unequal, which is probably attributed to the difference of their conjugated structures. Two-photon-based optical power-limiting and stabilization against nanosecond laser pulses of one isomer was demonstrated. Additionally, these two chromophores exhibit strong three-photon-induced fluorescence when excited by the nanosecond laser with longer wavelengths (≥1000 nm), implying their potential utility to serve as prototypes for the development of three-photon materials. |
| Databáze: | OpenAIRE |
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