Star-shaped triazine-cored ladder-type ter(p-phenylene)s for high-performance multiphoton absorption and amplified spontaneous blue emission
| Autor: | Hai Hua Fan, Xiao Liu, Man Shing Wong, Hai-Bin Luo, Lei Guo, Tongxin Zhang |
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| Rok vydání: | 2020 |
| Předmět: |
Amplified spontaneous emission
Photoluminescence Fluorophore Materials science 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Laser 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Phenylene law Materials Chemistry 0210 nano-technology Absorption (electromagnetic radiation) Lasing threshold Triazine |
| Zdroj: | Journal of Materials Chemistry C. 8:1768-1772 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c9tc06025a |
| Popis: | Lacking high-performance blue emissive multiphoton absorption (MPA) materials particularly for frequency up-converted amplified spontaneous emission (ASE) or lasing hampers novel breakthroughs in a wide-range of laser-based applications. Besides, it is fundamentally challenging to develop highly efficient organic multiphoton-pumped ASE or lasing materials because of intrinsically weak MPA responses restricted by limited and inefficient intramolecular π-electron delocalization. Despite such short π-conjugated ter(p-phenylene) backbones, newly developed star-shaped triazine-cored ladder-type ter(p-phenylene)s exhibit not only remarkably strong multiphoton (from two- to five-photon) induced photoluminescence but also highly efficient MPA properties including a record high intrinsic 2PA cross-section of 5120 GM and outstandingly large intrinsic 3PA cross-section of 3.3 × 10−76 cm6 s2 at 1200 nm for a blue emissive fluorophore as well as highly efficient 2PA pumped blue ASE with efficiency up to ∼1.0%, in sharp contrast to triarylamine-based star-shaped analogues. As a result, TA(TL)-Ph(3)-CBZ is a highly efficient blue emissive MPA material for practical MPA applications. The synergy of the triazine core and the end-groups in this multidimensional structural framework proved indispensable to such a high-performance MPA response. |
| Databáze: | OpenAIRE |
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