| Texto completo | |
| Autor(es): Mostrar menos - |
Manoel, Diego L.
;
Pelosi, Andre R.
;
Cocca, Leandro H. Zucolotto
;
Almedia, Gustavo F. B.
;
Sciuti, Lucas F.
;
Rodriguez, Ruben D. F.
;
Adriano Junior, Luizmar
;
Lima, Rosa S.
;
Noda-Perez, Caridad
;
Martins, Felipe T.
;
Souza, Marcio A. R.
;
Goncalves, Pablo J.
;
Fonseca, Tertius L.
;
de Boni, Leonardo
;
Mendonca, Cleber R.
Número total de Autores: 15
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY; v. 429, p. 10-pg., 2022-08-01. |
| Resumo | |
Organic molecules exhibiting second and third-order nonlinear optical properties (NLOP) allow several applications in optics and photonics. Among the class of organic compounds, terpenoid-like chalcones derivatives constitute a suitable choice as nonlinear optical materials, given the possibility of obtaining a wide range of compounds that can be used in biophotonic applications. In this way, here we present a study of the first-order molecular hyperpolarizability and the two-photon absorption (2PA) cross-section of several terpenoid-like chalcones derivatives, aiming for applications in the therapeutic window. The 2PA spectra were evaluated employing the femtosecond tunable Z-Scan technique from 480 nm to 850 nm, and the first hyperpolarizability was determined at 1064 nm using the Hyper-Rayleigh scattering (HRS) technique. Moreover, the first-order molecular hyperpolarizability and the 2PA spectra were modeled by the sum-over-states (SOS) approach and undamped phenomenological model, respectively, providing new insights into the properties and compounds structure relationship. Results showed that substituent features, such as electron-donating or withdrawing ability, were associated with the 2PA cross-section magnitude. Regarding HRS results, it was possible to compare the difference of state dipole moment from both approaches, combining two experimental mutes to determine photophysical parameters of non-fluorescent compounds, revealing the structure-relationship aiming the increase of the NLOP at the near-infrared region. (AU) | |
| Processo FAPESP: | 18/11283-7 - Fotônica não linear: espectroscopia e processamento avançado de materiais |
| Beneficiário: | Cleber Renato Mendonça |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |