Enhancement of the molecular hyperpolarizability by a supramolecular amylose–dye inclusion complex, studied by hyper-Rayleigh scattering with fluorescence suppression

摘要: Abstract The first hyperpolarizability β of a free hemicyanine dye and homologue included in supramolecular complex have been determined by hyper-Rayleigh scattering. Since the inclusion is fluorescent, high-frequency demodulation time-delayed multiphoton fluorescence has used to retrieve fluorescence-free inherent value for its hyperpolarizability. does not exhibit fluorescence; induces with lifetime 4.8±0.1 ns; dispersion-free β0 approximately twice that ((200±5)×10−30 vs. (100±10)×10−30 esu)). enhanced polar orientation this thin films, better thermal mechanical stability, together increase molecular nonlinearity confirm as way engineer efficient macroscopic arrangements nonlinear optics.