Ultraviolet transient absorption, transient grating and photon echo studies of aqueous tryptophan

Ajdarzadeh, Ahmad; Consani, Cristina; Bräm, Olivier; Tortschanoff, Andreas; Cannizzo, Andrea; Chergui, Majed (2013). Ultraviolet transient absorption, transient grating and photon echo studies of aqueous tryptophan. Chemical physics, 422, pp. 47-52. Elsevier 10.1016/j.chemphys.2013.01.036

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We compare UV transient grating (TG) experiments of aqueous tryptophan with transient absorption (TA) and fluorescence up-conversion measurements. The TG and TA signals show a bi-exponential rise with sub-ps and ps time constants, which are consistent with the fluorescence studies. Using experimental data, we provide an equation for the homodyne-detected TG signal, taking into account the sub-100 fs internal conversion of tryptophan after excitation. In addition, we measure a sub-100 fs homogeneous electronic dephasing time for tryptophan in water by the photon echo (PE) technique. These measurements provide a consistent picture of excited state dynamics of aqueous tryptophan that may serve as a basis for coherent 2D-UV spectroscopy of biosystems.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics
08 Faculty of Science > Institute of Applied Physics > Lasers

UniBE Contributor:

Cannizzo, Andrea

Subjects:

600 Technology > 620 Engineering
500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

0301-0104

Publisher:

Elsevier

Language:

English

Submitter:

Andrea Cannizzo

Date Deposited:

10 Feb 2021 12:18

Last Modified:

10 Feb 2021 12:27

Publisher DOI:

10.1016/j.chemphys.2013.01.036

BORIS DOI:

10.48350/151352

URI:

https://boris.unibe.ch/id/eprint/151352

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