Isolation of adenine salts in the gas phase from a liquid beam of aqueous solutions by IR laser irradiation
East Tokyo laboratory, Genesis Research Institute, Inc.
and Cluster Research Laboratory, Toyota Technological Institute
717-86 Futamata, Ichikawa, Chiba 272-0001, Japan
Corresponding author: a email@example.com
Published online: 13 September 2002
A continuous liquid flow in a vacuum (a liquid beam) of an aqueous solution of adenine salt containing hydrochloric acid or sodium hydroxide was irradiated with an intense pulsed IR laser at 3 μm, which is resonant to a vibrational mode related to the OH stretch vibration of H2O. Neutral species isolated into the vacuum were ionized by a pulsed UV laser at 270 nm, and the product ions were mass-analyzed by a time-of-flight mass spectrometer. It is found that AHCl- and [ A–iH] Na+ (i=1–3) are isolated in the vacuum from the aqueous acidic and alkaline solutions, respectively, under irradiation of the IR laser, and undergo four-photon ionization involving decomposition and proton transfer of the intermediate species under irradiation of the UV laser.
PACS: 61.80.Ba – Ultraviolet, visible, and infrared radiation effects (including laser radiation) / 68.03.-g – Gas-liquid and vacuum-liquid interfaces / 82.39.Pj – Nucleic acids, DNA and RNA bases
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002