Abstract

A new class of molecules, consisting of substituted cyclohexadien-2-yl-amines, is proposed as candidates for new materials with non-linear optical properties. The first hyperpolarizability tensor components for these molecules are calculated at the CPHF/6-31G**++, CPDFT/B3LYP/6-31G**++ and CPDFT/X3LYP/6-31G**++ levels. The results are analyzed in terms of the partition of the tensor into its dipolar and octupolar components. The molecules present calculated β components with values comparable to those of p-nitro-aniline, but with structural features that should result in materials with more than one axis of optical activity, and without the common pitfall of classic push–pull molecules, namely, the tendency to form centro-symmetric crystals. Calculated EFISH values, for future comparison with experimental data, are also presented.

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