highlight 2 2019

Transient absorption is one of the workhorses in our lab for investigating ultrafast processes triggered by light; such as electron, proton or energy transfer.

Recently, we developed a new setup, which expands the accessible spectral region towards the near infrared (NIR). The combination of the visible and the new NIR transient absorption setups covers the whole 6000 to 30000 cm–1 range without interruption. This is illustrated in the above figures where photoexcitation of a substituted perylene derivative into the S1 state is followed by the population of an emissive charge-transfer state in polar solvents, a path not accessible in apolar solvents.

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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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