https://doi.org/10.1051/epjconf/201819002009
Multiphoton spectroscopy: An optical window into molecular electrostatics
1
Montana State University, Physics Department, Bozeman, Montana, 59717, USA
2
National Institute of Chemical Physics and Biophysics, Tallinn, 12618, Estonia
* Corresponding author: arebane@montana.edu
Published online: 26 September 2018
Quantitative knowledge about static molecular electric dipole moments is essential for understanding of intramolecular charge transfer as well as nanometer-scale static electric interactions. However, measuring or determining the molecular electrostatic properties with sufficient accuracy remains a challenging task. In our experiments, we measure the femtosecond two-photon absorption spectra- and cross sections of a range of organic- and organometallic chromophores in solution and use these data to determine the electric dipole moment change in corresponding lowest-energy dipole-allowed transition. Good correspondence of our experimental dipole moments with the quantum-chemical calculations as well as reports by other groups using conventional dipole moment measurement methods suggests that quantitative multiphoton spectroscopy may offer all-optical alternative to the traditional techniques such as Stark effect and electrochromism.
© The Authors, published by EDP Sciences, 2018
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