Development of Ultraviolet–Ultraviolet Hole-Burning Spectroscopy for Cold Gas-Phase Ions | Zendy

Géraldine Féraud | Zendy; Claude Dedonder | Zendy; Christophe Jouvet | Zendy; Yoshiya Inokuchi | Zendy; Takeharu Haino | Zendy; Ryo Sekiya | Zendy; Takayuki Ebata | Zendy

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Development of Ultraviolet–Ultraviolet Hole-Burning Spectroscopy for Cold Gas-Phase Ions

Author(s) -

Géraldine Féraud,

Claude Dedonder,

Christophe Jouvet,

Yoshiya Inokuchi,

Takeharu Haino,

Ryo Sekiya,

Takayuki Ebata

Publication year - 2014

Publication title -

the journal of physical chemistry letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.563

H-Index - 203

ISSN - 1948-7185

DOI - 10.1021/jz500478w

Subject(s) - chemistry , ultraviolet , mass spectrometry , spectroscopy , quadrupole ion trap , ion , ultraviolet visible spectroscopy , population , tautomer , photochemistry , ion trap , analytical chemistry (journal) , protonation , materials science , physics , organic chemistry , optoelectronics , demography , chromatography , quantum mechanics , sociology

A new ultraviolet-ultraviolet hole-burning (UV-UV HB) spectroscopic scheme has been developed for cold gas-phase ions in a quadrupole ion trap (QIT) connected with a time-of-flight (TOF) mass spectrometer. In this method, a pump UV laser generates a population hole for the ions trapped in the cold QIT, and a second UV laser (probe) monitors the population hole for the ions extracted to the field-free region of the TOF mass spectrometer. Here, the neutral fragments generated by the UV dissociation of the ions with the second laser are detected. This UV-UV HB spectroscopy was applied to protonated dibenzylamine and to protonated uracil. Protonated uracil exhibits two strong electronic transitions; one has a band origin at 31760 cm(-1) and the other at 39000 cm(-1). From the UV-UV HB measurement and quantum chemical calculations, the lower-energy transition is assigned to the enol-keto tautomer and the higher-energy one to the enol-enol tautomer.

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