highlight 6 2020

We are investigating the excited state dynamics of the dye Malachite Green (MG) at dodecane/phospholipid/water interfaces using the second harmonic generation and the time-resolved second harmonic generation techniques (TRSSHG). The above figure shows preliminary data of the normalized TRSSHG signal measured with MG at the interface with DPPG deposited on the water surface at two different surface coverages. These time profiles reflect the change of the ground-state recovery dynamics of MG  after excitation. We see that  addition of the lipids slows down the overall dynamics.This effect will be investigated further by varying the environment and the probe. Such studies aim at a better understanding of the interactions between the surface of biological membranes and water-soluble molecules.

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Eric Vauthey

Physical Chemistry Department - Sciences II - University of Geneva
30, Quai Ernest Ansermet - CH-1211 Geneva 4 (Switzerland)

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