13 September 2007 NLO properties of dithienothiophene-based chromophores: a comparison study between the donor/donor and donor/acceptor substitution patterns
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Abstract
In this work, we present a comparative study of the second order nonlinear optical properties of a series of chromophores containing a fused terthiophene, namely dithienothiophene (DTT), as electron relay with either D-π-A or D-π-D substitution patterns. The effect of the acceptor/donor strength and the solvent polarity confirm the possibility of fine-tuning optical non-linearities in the asymmetric samples. The geometrical and electronic properties calculated in solution reveal that push-pull chromophores become highly polarized as the dielectric constant of the solvent increases. Theoretical NLO calculations furthermore reveal a moderate nonlinear optical activity for the symmetric samples.
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M. Carmen Ruiz Delgado, Juan Casado, Víctor Hernández, Juan Teodomiro López Navarrete, Oh-Kil Kim, Han Young Woo, Belén Villacampa, Raquel Alicante, Jesús Orduna, Javier Garín, "NLO properties of dithienothiophene-based chromophores: a comparison study between the donor/donor and donor/acceptor substitution patterns", Proc. SPIE 6653, Linear and Nonlinear Optics of Organic Materials VII, 66530X (13 September 2007); doi: 10.1117/12.733723; https://doi.org/10.1117/12.733723
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