Synthesis and two-photon absorption spectrum of fluorenone-based molecules
| Autor: | L. De Boni, Ruben D. Fonseca, J. Dipold, Alfredo M. Simas, D. L. Silva, J.V. dos Anjos, Gustavo L. C. Moura, Cleber Renato Mendonça, R. J. M. B. Batista |
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| Rok vydání: | 2016 |
| Předmět: |
General Physics and Astronomy
02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Two-photon absorption Molecular physics Spectral line 0104 chemical sciences chemistry.chemical_compound Wavelength Fluorenone chemistry COMPOSTOS ORGÂNICOS Femtosecond Molecule Density functional theory Physical and Theoretical Chemistry 0210 nano-technology Maxima |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | The two-photon absorption (2PA) of five symmetrical fluorenone-based molecules is studied by femtosecond wavelength-tunable Z-scan, as well as quantum-chemical calculations. The molecules are transparent for wavelengths greater than 500 nm and two main one-photon absorption bands are observed in the blue region; one weak, centered at 450 nm, and a stronger one at approximately 360 nm. We observed a strong 2PA band located around 720 nm with maxima 2PA cross-sections between 100 and 230 GM. Quantum chemical calculations employing the response function formalism were performed at the Density Function Theory level to support the interpretation of the experimental nonlinear spectra. |
| Databáze: | OpenAIRE |
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