Picosecond dynamic of aqueous sodium-copper chlorophyllin solution: an excited state absorption study
| Autor: | Anderson R.L. Caires, L. De Boni, Leandro H. Z. Cocca, Pablo José Gonçalves, Lucas F. Sciuti |
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| Rok vydání: | 2018 |
| Předmět: |
Aqueous solution
Materials science Absorption spectroscopy Chlorophyllin Analytical chemistry General Physics and Astronomy Saturable absorption FLUORESCÊNCIA 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Excited state Picosecond Femtosecond Singlet state Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | This work reports on the singlet excited-state absorption spectrum of sodium-copper chlorophyllin using three distinct methods of Z-Scan measurement: white-light continuum Z-Scan technique ranging from 470 to 780 nm, tunable Z-Scan technique with femtosecond pulses (490–700 nm) and 532 nm Z-Scan technique with 100 ps pulse width. A transition from reverse saturation absorption (RSA) to saturable absorption (SA) was observed at 570 nm, and at 532 nm RSA was tested showing potential application as optical limiting device. Pump-probe technique was used to measure lifetime of the first singlet excited state (22 ps) and no evidence of triplet conversion was observed. |
| Databáze: | OpenAIRE |
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