Determination of the hyperpolarizability of an octopolar molecular ion by hyper-Rayleigh scattering

T. Verbiest, F. Meyers, Jean-Luc Bredas, K. Clays, A. Persoons

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The first observation to our knowledge of a second-order nonlinear optical effect in a nonpolar molecular ion is reported. Hyper-Rayleigh scattering was observed from aqueous and organic solutions of the tricyanomethanide ion [C(CN) 3 ] . Because of the absence of a dipole moment and the presence of a charge in this planar, nonpolar, but highly polarizable molecular anion with D 3h symmetry, no electric-field-induced second-harmonic-generation experiments are possible. The experimental values for the first hyperpolarizability β xxx [(7 ± 1.5) × 10 −30 esu, independent of the solvent] are in good agreement with the results from quantum-chemical calculations.

Original languageEnglish (US)
Pages (from-to)525-527
Number of pages3
JournalOptics Letters
Issue number7
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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