Far-infrared spectra of the tryptamine A conformer by IR-UV ion gain spectroscopy

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Title:	Far-infrared spectra of the tryptamine A conformer by IR-UV ion gain spectroscopy
Author(s):	Schmitt, M.; Spiering, F.; Zhaunerchyk, V.; Jongma, R.T. ; Jaeqx, S.; Rijs, A.M.; van der Zande, W.J.
Publication year:	2016
Source:	PCCP Physical Chemistry Chemical Physics, vol. 18, iss. 47, (2016), pp. 32116-32124
ISSN:	1463-9076
DOI:	http://dx.doi.org/10.1039/c6cp02358d
Publication type:	Article / Letter to editor
Please use this identifier to cite or link to this item : http://hdl.handle.net/2066/166095
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Subject:	FELIX Molecular Structure and Dynamics Molecular and Biophysics
Organization:	Molecular and Biophysics Molecular Structure and Dynamics
Journal title:	PCCP Physical Chemistry Chemical Physics
Volume:	vol. 18
Issue:	iss. 47
Page start:	p. 32116
Page end:	p. 32124
Abstract:	We present far infrared spectra of the conformer A of tryptamine in the 200 to 500 cm-1 wavenumber range along with resonant photoionization spectra of the far-infrared excited conformer A of tryptamine. We show that single-far-infrared photon excited tryptamine has highly structured resonance enhanced multi-photon ionization spectra, revealing the mode composition of the S1-state. Upon multiple-far-infrared photon absorption, the resonance enhanced multi-photon ionization spectrum broadens allowing ion gain spectroscopy to be performed. In the ion gain spectrum we detect the fundamental far-infrared modes but also combination and overtone bands with high efficiency. The implications to dip spectroscopy using a free electron laser compared to more conventional light sources are discussed.