13 October 1997 Periarylated acenes: from one-dimensional to novel multidimensional NLO phores
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We have designed a novel type of NLO-phores based on donor/acceptor (D/A)-substituted peri-arylated naphthalenes 2 with improved efficiency-transparency trade off. In contrast to the conventional one-dimensional conjugated (iD-CT) systems 1 our concept prevents a direct conjugation between the D/A-substituents instead it is based on multidimensional polarizations (e.g. 3D-CT) utilizing through-space interactions. The comparison of iD-CT systems with isomeric compounds of the nonconjugated 3D-CT type reveals much better f3- values for the latter ones. This could be attributed to more than one electronic transitions in the long wavelength region. As a result these chromophores are not limited by the two-level model.
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Walter Grahn, Walter Grahn, A. Bahl, A. Bahl, Stephan Link, Stephan Link, Stefan Stadler, Stefan Stadler, Roland Dietrich, Roland Dietrich, Klaus Meerholz, Klaus Meerholz, Christoph R. Braeuchle, Christoph R. Braeuchle, "Periarylated acenes: from one-dimensional to novel multidimensional NLO phores", Proc. SPIE 3147, Nonlinear Optical Properties of Organic Materials X, (13 October 1997); doi: 10.1117/12.284255; https://doi.org/10.1117/12.284255

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