New quinacridone derivatives: Structure-function relationship exploration to enhance third-order nonlinear optical responses
| Autor: | Liang Han, Jian-Rong Gao, Yizhu Li, Wenbiao Wang, Jianhong Jia, Chaoqun Luo, Yujing Li |
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| Rok vydání: | 2017 |
| Předmět: |
Steric effects
Materials science Series (mathematics) business.industry Process Chemistry and Technology General Chemical Engineering 02 engineering and technology Photoelectric effect Chromophore 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Nonlinear system chemistry.chemical_compound chemistry Quinacridone Optoelectronics Molecule Z-scan technique 0210 nano-technology business |
| Zdroj: | Dyes and Pigments. 146:251-262 |
| ISSN: | 0143-7208 |
| DOI: | 10.1016/j.dyepig.2017.06.026 |
| Popis: | Exploiting synergistic cooperation between multiple sources of optical nonlinearity, we report the design, synthesis, and the third-order nonlinear optical (NLO) properties of a series of quinacridone-based materials with condensed π-systems, and sterically regulated inter-aryl twist angles. By introducing dicyanoethylene groups not only successfully modified the structures and photoelectric properties of the chromophores but also led to the superior third-order NLO properties. The relationships between molecular structure and mechanisms of the enhanced nonlinear refractive index were illuminated by spectroscopic, electrochemical, and Z-scan measurements. Combined with quantum chemical calculations, the test data and theory calculations were verified. The maximum nonlinear absorptive coefficients (χ(3)) in these materials based on chromophore QA-B2 is 15.456 × 10−13 esu, which is more than 5 times higher than that of mono-modified QA. Our results clearly suggest that quinacridone-based materials have good photo-thermal stability and large third-order NLO properties, are very promising for integrated NLO devices. |
| Databáze: | OpenAIRE |
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