Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 369, Issue -, Pages 70-76Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2018.10.012
Keywords
Dibenzylideneacetone derivatives; Organic molecules; First molecular hyperpolarizability; Two-photon absorption; Hyper-Rayleigh scattering; Z-Scan
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Funding
- FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo) [2011/23587-1, 2016/20886-1]
- CNPQ (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico)
- Air Force Office of Scientific Research [FA9550-12-1-0028, FA9550-15-1-0521]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
- National Institute of Photonics (INCT de Fotonica) [465763/2014-6]
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This work reports the study of the second- and third-order nonlinear optical properties of two dibenzylide-neacetone derivatives: (1E,4E)-1,5-bis(4-bromophenyl)penta-1,4-dien-3-one (4-DBDBA) and (1E,4E)-1,5-bis(4-chlorophenyl)penta-1,4-dien-3-one (4-DCDBA) in dichloromethane solution. The nonlinear optical properties investigated were the first molecular hyperpolarizability and the two-photon absorption (2PA) cross-section by using the hyper-Rayleigh scattering (HRS) and Z-scan techniques respectively. The values of the first molecular hyperpolarizability obtained by HRS (beta(HRS)) were 25 x 10(-30) cm(4) statvolt(-1) for 4-DBDBA whereas for 4-DCDBA was 27 x 10(-3) cm(4) statvolt(-1). The peak value for 2PA cross-section by the spectral measurement was around 24 GM for 4-DBDBA and 17 GM for 4-DCDBA. In addition, quantum chemical calculations were performed to support the interpretation from experimental results.RS
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