Second-order nonlinear optical properties of zwitterionic chromophores

Ayele Teshome; Inge Asselberghs; David J. Clarke; Ayla P. Middleton; M. Delower H. Bhuiyan; Gerald J. Smith; Andrew J. Kay; Koen Clays

doi:10.1117/12.854664

18 May 2010 Second-order nonlinear optical properties of zwitterionic chromophores

Ayele Teshome, Inge Asselberghs, David J. Clarke, Ayla P. Middleton, M. Delower H. Bhuiyan, Gerald J. Smith, Andrew J. Kay, Koen Clays

Author Affiliations +

Proceedings Volume 7722, Organic Photonics IV; 772228 (2010) https://doi.org/10.1117/12.854664
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

The molecular linear and second-order nonlinear optical (NLO) properties of a series of donor (D)-π-acceptor (A) merocyanine molecules have been studied in three solvents, dimethylformamide (DMF), tetrahydrofuran (THF), and chloroform (CHCl₃). All the compounds have a cyanodicyanomethylidenedihydrofuran electron acceptor system with either a pyridinylidene or quinolinylidene donor group. In high polarity solvents the molecules with a quinolinylidene donor have larger first hyperpolarizabilities than those with a pyridinylidene donor, while the opposite is true in low polarity solvents. The molecules under investigation have an aromatizable donor unit, which leads to a high degree of charge separation in the ground-state; as a result they have a strong tendency to aggregate. To minimize these interactions arene-rich bulky groups have been introduced in a number of these compounds.

Citation Download Citation

Ayele Teshome, Inge Asselberghs, David J. Clarke, Ayla P. Middleton, M. Delower H. Bhuiyan, Gerald J. Smith, Andrew J. Kay, and Koen Clays "Second-order nonlinear optical properties of zwitterionic chromophores", Proc. SPIE 7722, Organic Photonics IV, 772228 (18 May 2010); https://doi.org/10.1117/12.854664

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