<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Vibrationally induced interconversion of H-bonded NO 2^- · H 2O isomers within NO 2^- · H 2O·Ar m clusters using IR - IR pump - Probe through the OH and NO stretching vibrations"^^ . "We introduce a method based on sequential application of vibrational predissociation spectroscopy to explore the high-amplitude rearrangements available in a small H-bonded complex that is vibrationally excited within a larger Ar cluster. The weakly bound Ar atoms play the role of a solvent in mediating the energy content of the embedded system, ultimately quenching it into local minima through evaporation. We demonstrate the approach on the NO 2-·H 2O binary hydrate, which is known to occur in two nearly isoenergetic isomeric forms. The scheme involves three stages of mass separation to select a particular NO 2-·H 2O·Ar m parent ion cluster prior to vibrational excitation and then isolate the NO 2-·H 2O·Ar fragment ions for interrogation using resonant vibrational predissociation with a second infrared laser. The initial vibrational excitation selectively energizes one of the isomers through one of its characteristic resonances while the predissociation spectrum of the NO 2-·H 2O· Ar fragment encodes the distribution of isomers present after Ar evaporation. Isomerization from the front- to backside form is found to occur upon excitation of the NO stretch near 1200 cm -1; although the reverse reaction is not observed upon excitation of the NO stretch, it is observed upon excitation of the higher-energy OH stretching fundamental near 3000 cm -1. We discuss these observations in the context of the calculated isomerization energetics, which focus on the minimum energy structures for the isomers as well as the transition states for their interconversion. © 2009 American Chemical Society."^^ . "2009-02-12" . . "113" . "6" . . "Journal of Physical Chemistry A"^^ . . . "10895639" . . . . . . . . . . . . . . . . . . . . . . "D"^^ . "Jing"^^ . "D Jing"^^ . . "GH"^^ . "Weddle"^^ . "GH Weddle"^^ . . "MA"^^ . "Johnson"^^ . "MA Johnson"^^ . . "BM"^^ . "Elliott"^^ . "BM Elliott"^^ . . "KD"^^ . "Jordan"^^ . "KD Jordan"^^ . . "RA"^^ . "Relph"^^ . "RA Relph"^^ . . . . . . "Vibrationally induced interconversion of H-bonded NO 2^- · H 2O isomers within NO 2^- · H 2O·Ar m clusters using IR - IR pump - Probe through the OH and NO stretching vibrations (Plain Text)"^^ . . . "licence.txt"^^ . . . "Vibrationally induced interconversion of H-bonded NO 2^- · H 2O isomers within NO 2^- · H 2O·Ar m clusters using IR - IR pump - Probe through the OH and NO stretching vibrations (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #16155 \n\nVibrationally induced interconversion of H-bonded NO <inf>2</inf>^- · H <inf>2</inf>O isomers within NO <inf>2</inf>^- · H <inf>2</inf>O·Ar <inf>m</inf> clusters using IR - IR pump - Probe through the OH and NO stretching vibrations\n\n" . "text/html" . .