Unimolecular Reactions in Molecular Ions and Cluster Ions — From Thermal Towards State-Selective Experiments

Weitzel, Karl‐Michael

doi:10.1142/9789812813473_0010

Cited by 3 publications

(2 citation statements)

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“…1,2 The neccessary prerequisite to obtain information on the energy distribution is knowledge of the total energy deposited into the precursor molecule. The unimolecular decomposition of ions (in particular in photoionization) has been studied since several decades [2][3][4][5][6][7][8][9][10][11][12] as ions are easy to handle and to detect. In photoionization of a polyatomic molecule (M), e.g., the parent cation M +(*) may decompose into fragments…”

Section: Introductionmentioning

confidence: 99%

“…In order to control the energy content in the precursor ion M +(*) for a particular photon energy, coincidence techniques are commonly used. [9][10][11][12] At a given photon energy the ion (parent or fragment) is then detected in coincidence with the photoelectron of particular energy. Numerous investigations concerning the unimolecular dissociation of cations have been performed with the aim to test theories describing unimolecular decompositions but also to find means to control such reactions.…”

Section: Introductionmentioning

confidence: 99%

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Energy balance in dissociative electron attachment to C2F5I

Langer

Matejčík

Illenberger

2002

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy balance in dissociative electron attachment to C2F5I

Langer

Matejčík

Illenberger

2002

Phys. Chem. Chem. Phys.

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The Kinetics of Methyl Loss from Ethylbenzene and Xylene Ions: The Tropylium versus Benzylium Story Revisited

2003

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The rate constant curves k(E) for the formation of C 7 H 7 + ions by methyl loss from energy selected ethylbenzene and o-xylene ions have been determined over a range from 10 3 s -1 to 5 × 10 6 s -1 in a reflecting ion timeof-flight mass spectrometer. The observed threshold for methyl loss from ethylbenzene ions is 3 kJ/mol lower than that in o-xylene ions. The slope of the rate constant curves is very different at the threshold, indicating that isomerization of the precursors to a common intermediate does not play an important role. From the analysis we conclude that the C 7 H 7 + ions formed at the threshold have the structure of benzylium ions for ethylbenzene but that of tropylium ions for the o-xylene. At higher energies both C 7 H 7 + isomers appear to be formed from ethylbenzene ions.

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COINCIDENCE SPECTROSCOPY

Continetti

2001

Annu. Rev. Phys. Chem.

122

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The application of coincidence techniques to the study of the reaction dynamics of isolated molecules is reviewed. Coincidence spectroscopy is a powerful approach for carrying out a number of measurements. At its most basic level, coincidence techniques can identify the source of a specific signal, as in the well-known photoelectron-photoion coincidence approach used for several years. By carrying out coincidence experiments in an increasingly differential manner, correlated energy and angular distributions of reaction products may be recorded. Completely energy- and angle-resolved measurements of photoelectrons and ionic or neutral products can reveal molecular-frame photoelectron and photofragment angular distributions and aid in the characterization of dissociative states of molecules and ions. Recent work in this area is reviewed, including examples from studies of dissociative photodetachment, dissociative photoionization, time-resolved studies of dissociative photoionization, and three-body dissociation processes.

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Unimolecular Reactions in Molecular Ions and Cluster Ions — From Thermal Towards State-Selective Experiments

Cited by 3 publications

References 20 publications

Energy balance in dissociative electron attachment to C2F5I

Energy balance in dissociative electron attachment to C2F5I

The Kinetics of Methyl Loss from Ethylbenzene and Xylene Ions: The Tropylium versus Benzylium Story Revisited

COINCIDENCE SPECTROSCOPY

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