What is it about?
Results of the spectral dependence of the first-order molecular hyperpolarizability in literature are scarce by the demand for a high-intensity stable wavelength tunable laser and for the experimental difficulty too. Therefore, we implemented an experimental setup applying a femtosecond tunable laser to measure, for the first time, the spectral dependence of the first-order molecular hyperpolarizability in five cinnamylidene derivatives.
Photo by Michael Dziedzic on Unsplash
Why is it important?
We found important results about these molecules: a) exists an enhancement of the values at first-order hyperpolarizability (beta) for two-photon absorption resonance for all molecules, b) The strength of electron donor (ED) and withdraw groups( EW) linked at peripheral regions of the main backbone plays a fundamental hole at the values of beta. We find a mathematical relation to preview the values of beta for different strengths of ED and EW for the same main backbone.
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This page is a summary of: Observation of the two-photon transition enhanced first hyperpolarizability spectra in cinnamaldehyde derivatives: A femtosecond regime study, The Journal of Chemical Physics, June 2023, American Institute of Physics, DOI: 10.1063/5.0151622.
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