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Proceedings Paper

Investigations of molecular nonlinear optical polarizabilities of azobenzenes substituted with strong acceptor groups
Author(s): Valentin Victor Jerca; Florica Adriana Jerca; Ileana Rau; Francois Kajzar; Dan Sorin Vasilescu; Dumitru Mircea Vuluga
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Paper Abstract

In this paper, a detailed optical characterization of a series of 4-nitro/cyan, 2-nitro/cyan and 2,4-nitro/cyan substituted azobenzenes is carried out. The first-order hyperpolarizabilities of organic chromophores were determined by solvatochromic method. Different nonlinear optical behaviour is evidenced when the ortho position of an azo molecule is occupied by acceptor and donor substituents. An increase of first-order hyperpolarizability was noticed in the case of 2,4-disubstituted azobenzenes as compared to the monosubstituted ones. Solvent effect on the UV-Vis absorption spectra of azo-polymers was investigated using Kamlet-Taft multiparameter equation. Kamlet-Taft equation revealed that hydrogen bond acceptor properties and dipolarity/polarizability of the solvent have a significant contribution upon the solvatochromic behavior of azo-derivatives.

Paper Details

Date Published: 27 August 2014
PDF: 7 pages
Proc. SPIE 9171, Nanobiosystems: Processing, Characterization, and Applications VII, 91710Z (27 August 2014); doi: 10.1117/12.2073075
Show Author Affiliations
Valentin Victor Jerca, "Costin D. Nenitescu" Institute of Organic Chemistry (Romania)
Univ. Politehnica of Bucharest (Romania)
Florica Adriana Jerca, "Costin D. Nenitescu" Institute of Organic Chemistry (Romania)
Ileana Rau, Univ. Politehnica of Bucharest (Romania)
Francois Kajzar, Univ. Politehnica of Bucharest (Romania)
Univ. d’Angers, Institut des Sciences et Technologies Moléculaires d’Angers (France)
Dan Sorin Vasilescu, Univ. Politehnica of Bucharest (Romania)
Dumitru Mircea Vuluga, "Costin D. Nenitescu" Institute of Organic Chemistry (Romania)

Published in SPIE Proceedings Vol. 9171:
Nanobiosystems: Processing, Characterization, and Applications VII
Norihisa Kobayashi; Fahima Ouchen; Ileana Rau, Editor(s)

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