Infrared photodissociation spectroscopy of [Aniline-(Water)n]+ (n = 1-8): Structural change from branched and cyclic to proton-transferred forms
Yoshiya Inokuchi,Kazuhiko Ohashi,Yoshiki Honkawa,Norifumi Yamamoto,Hiroshi Sekiya,Nobuyuki Nishi +5 more
TLDR
In this article, the infrared photodissociation spectra of [aniline−(H2O)n]- (n = 1−8) are measured in the 2700−3800 cm-1 region.Abstract:
Infrared photodissociation spectra of [aniline−(H2O)n]+ (n = 1−8) are measured in the 2700−3800 cm-1 region. The spectra are interpreted with the aid of density functional theory calculations. The n = 1 ion has an N−H···O hydrogen bond. The spectrum of the n = 2 ion demonstrates a large perturbation to both of the NH oscillators, indicating the 1−1 structure where each NH bond is bound to a water molecule. For the n = 3 ion, the calculated spectrum of the 2−1 branched structure coincides well with the observed one. For the n = 4 ion, there exist three strong bands at 2960, 3100, and 3430 cm-1, as well as a very weak one at 3550 cm-1. The observed spectrum in the 3600−3800 cm-1 region is decomposed into four bands centered at 3640, 3698, 3710, and 3734 cm-1. The 2−2 branched isomer is responsible for all the features except the 3550 and 3710 cm-1 bands. These two bands are due to another isomer with a five-membered ring. An infrared band characteristic of the n = 5 ion appears at 3684 cm-1, which is not se...read more
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Entrance channel complexes of cationic aromatic SN2 reactions: IR spectra of fluorobenzene+–(H2O)n clusters
TL;DR: In this paper, microhydrated fluorobenzene cation clusters were characterized by IR photodissociation spectra in the O-H stretch range and UB3LYP/6-31G* calculations.
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Ground state proton transfer in phenol-(NH3)(n) (n ≤ 11) clusters studied by mid-IR spectroscopy in 3-10 μm range.
Mitsuhiko Miyazaki,Ayako Kawanishi,I B Nielsen,Ivan Alata,Shun-ichi Ishiuchi,Claude Dedonder,Claude Dedonder,Christophe Jouvet,Christophe Jouvet,Masaaki Fujii +9 more
TL;DR: The mid-IR spectroscopy directly proves the structural change induced by the deprotonation from the O-H bond and thus establishes the GSPT reaction as complete at n = 9, establishing coexistence of both species for the first time.
Journal ArticleDOI
Activationless nonradiative decay in rhodamines: Role of NH and lower frequency vibrations in solvent kinetic isotope effects
TL;DR: In this paper, the solvent kinetic isotope effect in the nonactivated rate constants of Rhodamine 123 and Rhodamine B is discussed in water-H 2, relatively to water-D 2.
Journal ArticleDOI
Infrared spectroscopy of hydrated alkali metal cations: evidence of multiple photon absorption.
Jordan P. Beck,James M. Lisy +1 more
TL;DR: Evidence from Rice-Ramsperger-Kassel-Marcus-evaporative ensemble calculations and laser fluence dependence experiments indicates that the multiple water loss channels are primarily the result of multiple photon absorption, which it is proposed could be due to multiple, independent oscillators within a cluster ion each absorbing a photon during a single, 10 ns laser pulse.
Journal ArticleDOI
Photoionization and vibrational spectroscopy of the aniline-methanol clusters.
Yongjun Hu,Elliot R. Bernstein +1 more
TL;DR: Measured IR spectra and theoretical results for neutral clusters suggest that the H atom of the methanol OH moiety is bonded to the aniline amine group lone pair electrons for the neutral ground stateAniline-methanol cluster.
References
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Vibrational spectroscopy of the hydrated hydronium cluster ions H3O+·(H2O)n (n=1, 2, 3)
TL;DR: In this paper, a two color laser scheme consisting of a tunable cw infrared laser with 0.5 cm^−1 resolution used to excite the O−H stretching vibrations and a cw CO2 laser that dissociates the vibrationally excited cluster ion through a multiphoton process is presented.
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Infrared Spectra of H+(H2O)5-8 Clusters: Evidence for Symmetric Proton Hydration
Jyh-Chiang Jiang,Yi-Sheng Wang,Hai-Chou Chang,Sheng H. Lin,Yuan T. Lee,Gereon Niedner-Schatteburg,Huan-Cheng Chang +6 more
TL;DR: In this article, a vibrational predissociation spectroscopy and ab initio calculations of protonated water clusters from a supersonic expansion were performed at the B3LYP/6-31+G* level.
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Structures and Isomeric Transitions of NH4+(H2O)3-6: From Single to Double Rings
TL;DR: In this paper, a vibrational predissociation spectroscopy (VPS) was used to identify cyclic and noncyclic isomers in the supersonic jet.
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Characterization of the Hydrogen-Bonded Cluster Ions [Phenol−(H2O)n]+ (n = 1−4), (Phenol)2+, and (Phenol−Methanol)+ As Studied by Trapped Ion Infrared Multiphoton Dissociation Spectroscopy of Their OH Stretching Vibrations
TL;DR: In this article, the HO stretching vibrations of hydrogen-bonded cluster ions of phenol (PhOH), [PhOH−(H2O)n]- (n = 1−4), (PhO−methanol)+ and [PhO+−H3O+n−1]- were observed with infrared photodissociation spectroscopy in combination with an ion-trapping technique.
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Infrared spectroscopy of resonantly ionized (phenol)(h2o)n
TL;DR: In this article, the infrared spectra of (phenol)(H2O)n+ cluster ions (n = 1−4, 7, 8) have been recorded in the region from 2850 to 3800 cm-1.