Photodissociation of core excited molecules

Nenner, I.; Morin, Paul; Lablanquie, P.; Simon, M.; Levasseur, N.; Millire, P.

doi:10.1016/0368-2048(90)85053-c

Cited by 40 publications

(15 citation statements)

References 24 publications

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“…Figure 6 shows the molecular RAS spectrum, obtained from the same sample beam as 50 52 54 the cluster spectra. They match previously reported spectra 2,8 well. The atomic fragment features from UFD (decay channel M f ) are clearly visible.…”

Section: Bromomethane Rassupporting

confidence: 79%

“…All ratios are given with a precision of ±0.2. 8 outgoing Auger electron by the surrounding cluster. Nonetheless, the deviations are small enough that the previously employed fitting model was deemed sufficient for the analysis.…”

Section: Bromomethane Rasmentioning

confidence: 99%

“…2,[8][9][10] These investigations have been performed using near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and resonant Auger spectroscopy (RAS), and have focused on describing the character of the core excited state. Some recent studies of chloromethane, which is valence isoelectronic with bromomethane, and of larger molecules such as 1-bromo-2-chloroethane, utilizing a number of experimental techniques have shed additional light on the UFD process in such systems.…”

Section: Introductionmentioning

confidence: 99%

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Suppression of the molecular ultra-fast dissociation in bromomethane clusters

Rander

Lindblad

Bradeanu

et al. 2014

The Journal of Chemical Physics

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Suppression of the molecular ultra-fast dissociation in bromomethane clusters. We address the influence of clustering on the ultra-fast dissociation of bromomethane. Valence and core photo-electron spectroscopy, partial electron yield absorption, and resonant Auger spectroscopy have been used together with ab initio calculations to investigate the properties of the ultra-fast dissociation. The ratio of ultra-fast dissociation of molecules in clusters as compared to free molecules is determined to be significantly reduced. We propose partial delocalization of the excited electronic state as being responsible for this behavior. © 2014 AIP Publishing LLC. Journal of Chemical Physics

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Section: Bromomethane Rassupporting

confidence: 79%

Section: Bromomethane Rasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Suppression of the molecular ultra-fast dissociation in bromomethane clusters

Rander

Lindblad

Bradeanu

et al. 2014

The Journal of Chemical Physics

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“…the excitation of a core electron) of the neutral species, or when the photon energy can directly expel a core electron. [47][48][49][50] This study of the formation and decay of core-excited and core-ionized species has spawned a whole series of sophisticated coincidence experiments. [51] More generally, away from resonances and above the double ionization threshold, the probability for forming atomic dications is commonly of the order of a few percent with respect to that for forming a monocation.…”

Section: The Properties Of Isolated Dicationsmentioning

confidence: 99%

Bimolecular reactions of the dications and trications of atoms and small molecules in the gas-phase

Price

Fletcher

Gossan

et al. 2017

International Reviews in Physical Chemistry

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This review discusses the recent developments in our understanding of the electron transfer and bond-forming reactions of small atomic and molecular dications in the gas-phase. A summary of the properties of isolated dications is presented, followed by a review of the major experimental techniques used to probe dicationic reactivity. Electron transfer reactions of dications with neutral species are then discussed, including recent rationalizations of this class of reactivity using simple electrostatic models. Our current understanding of the reactions of dications with neutral atoms and molecules which result in the formation of new chemical bonds is then presented. This part of the account is built around three case studies, including some new results on the bond-forming reactions of O2 2+ with CH4. Moving beyond dicationic species, the account then discusses recent results concerning the bond-forming reactivity of tricationic atoms and small molecules. This section includes the mechanistic conclusions drawn from the first results involving the coincident detection of all three positively charged species generated from the reaction of a molecular trication: CS2 3+ + O2  SO + + CS + + O + . The review concludes with some thoughts concerning the future development of the field.

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“…The investigation of ionization and molecular fragmentation processes, induced by radiation absorption or by collisions with charged particles, is important in various research areas, such as plasma chemistry, the chemistry of the interstellar medium, astrophysics, radio astronomy, science of comets, exobiology, and the physics and chemistry of atmospheres. The excitation of molecular core electrons is of special interest because it can produce a site specific fragmentation − or induce isomerization with a specific pathway …”

Section: Introductionmentioning

confidence: 99%

Ionization and Fragmentation of DCOOD Induced by Synchrotron Radiation at the Oxygen 1s Edge: The Role of Dimer Formation

et al. 2016

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The ionization and photofragmentation of molecules in the core region has been widely investigated for monomers and dimers of organic molecules in the gas phase. In this study, we used synchrotron radiation to excite electrons of the oxygen K-edge in an effusive molecular beam of doubly deuterated formic acid. We used time-of-flight mass spectrometry and employed the spectroscopic techniques photoelectron-photoion coincidence and photoelectron photoion-photoion coincidence to obtain spectra of single and double coincidences at different pressures. Our results indicate the presence of ions and ion pairs that have charge-to-mass ratio higher than the monomer DCOOD, as the (DCOOD)·D(+), and pairs (DCO(+), DCO(+)) and (CO(+), DCO(+)). Comparing the spectra obtained for different pressures we can ascertain that these ions are formed by the fragmentation of DCOOD dimers.

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Photodissociation of core excited molecules

Cited by 40 publications

References 24 publications

Suppression of the molecular ultra-fast dissociation in bromomethane clusters

Suppression of the molecular ultra-fast dissociation in bromomethane clusters

Bimolecular reactions of the dications and trications of atoms and small molecules in the gas-phase

Ionization and Fragmentation of DCOOD Induced by Synchrotron Radiation at the Oxygen 1s Edge: The Role of Dimer Formation

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