Two-photon solvatochromism III: Experimental study of the solvent effects on two-photon absorption spectrum of p-nitroaniline. (February 2015)

• Record Type: Journal Article
• Authors: Wielgus, Małgorzata; Michalska, Joanna; Samoc, Marek; Bartkowiak, Wojciech
• Is Part Of: Dyes and pigments. Volume 113(2015)
• Page Start: 426
• Page End: 434
• Publication Date: 2015-02
• Subjects: Two-photon absorption -- Solvatochromism -- Solvent effect -- p-nitroaniline -- Two-level model -- Nonlinear optics; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2014.09.009
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: We report on the solvent influence on the two-photon absorption spectra of p -nitroaniline. Measurements of the two-photon absorption cross section values were performed in three solvents (1, 4-dioxane, propylene carbonate, dimethyl sulfoxide) using the Z-scan technique. The most important finding in this report is the observation that two-photon absorption cross section value, corresponding to the intramolecular charge-transfer state, is significantly intensified with the solvent polarity increase. In the case of a strongly positive solvatochromic molecule, the two-level model correctly predicts the observed two-photon absorption cross section value increase caused by the solvent polarity change. Graphical abstract: Highlights: Solvents of different polarity tune the two-photon absorption of p -nitroaniline. The two-photon absorption band shifted with the solvent polarity increase. The two-photon absorption cross section increased with the solvent polarity. Obtained data are in good agreement with two-level model predictions.