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

Ahmad Ajdarzadeh; Cristina Consani; Olivier Bräm; Andreas Tortschanoff; Andrea Cannizzo; Majed Chergui

doi:10.1016/j.chemphys.2013.01.036

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

Ahmad Ajdarzadeh, Cristina Consani, Olivier Bräm, Andreas Tortschanoff, Andrea Cannizzo, Majed Chergui

Research output: Contribution to journal › Article › peer-review

Abstract

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. © 2013 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	47-52
Number of pages	6
Journal	Chemical Physics
Volume	422
DOIs	https://doi.org/10.1016/j.chemphys.2013.01.036
Publication status	Published - 2013
Externally published	Yes

Keywords

Photon echo
Transient absorption
Transient grating
Tryptophan
Ultrafast
Ultraviolet

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10.1016/j.chemphys.2013.01.036

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

abstract = "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. {\textcopyright} 2013 Elsevier B.V. All rights reserved.",

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author = "Ahmad Ajdarzadeh and Cristina Consani and Olivier Br{\"a}m and Andreas Tortschanoff and Andrea Cannizzo and Majed Chergui",

year = "2013",

doi = "10.1016/j.chemphys.2013.01.036",

language = "English",

volume = "422",

pages = "47--52",

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TY - JOUR

T1 - Ultraviolet transient absorption, transient grating and photon echo studies of aqueous tryptophan

AU - Ajdarzadeh, Ahmad

AU - Consani, Cristina

AU - Bräm, Olivier

AU - Tortschanoff, Andreas

AU - Cannizzo, Andrea

AU - Chergui, Majed

PY - 2013

Y1 - 2013

N2 - 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. © 2013 Elsevier B.V. All rights reserved.

AB - 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. © 2013 Elsevier B.V. All rights reserved.

KW - Photon echo

KW - Transient absorption

KW - Transient grating

KW - Tryptophan

KW - Ultrafast

KW - Ultraviolet

UR - https://www.mendeley.com/catalogue/31363f36-a96d-3877-a5b4-b1dd03dc3fac/

U2 - 10.1016/j.chemphys.2013.01.036

DO - 10.1016/j.chemphys.2013.01.036

M3 - Article

SN - 0301-0104

VL - 422

SP - 47

EP - 52

JO - Chemical Physics

JF - Chemical Physics

ER -

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

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Keywords

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