4  Photodissociation in the gas phase

Sato, Hiroyasu

doi:10.1039/b313672h

Cited by 5 publications

(6 citation statements)

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“…Lin et al 4 photodissociated CH 3 Cl at 157.6 nm, and the reaction products were probed by VUV photoionization by synchrotron radiation. However, studies on this type of species using more energetic photons are less common; relevant examples that are mainly devoted to chloro-methyl derivatives 5 are CCl 4, 6 CHCl 3 , 7-9 CH 2 Cl 2 , 10 and CH 3 Cl. 11 Our research group has quite recently started a systematic study of the electronic properties of shallow-and inner-core level in carbonylsulfenyl-chloride compounds with general formula XC(O)SCl.…”

Section: Introductionmentioning

confidence: 99%

“…Lin et al photodissociated CH 3 Cl at 157.6 nm, and the reaction products were probed by VUV photoionization by synchrotron radiation. However, studies on this type of species using more energetic photons are less common; relevant examples that are mainly devoted to chloro-methyl derivatives are CCl 4, CHCl 3 , − CH 2 Cl 2 , and CH 3 Cl …”

Section: Introductionmentioning

confidence: 99%

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Perchloromethyl Mercaptan, CCl₃SCl, Excited with Synchrotron Radiation in the Proximity of the Sulfur and Chlorine 2p Edges: Dissociative Photoionization of Highly Halogenated Species

et al. 2009

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We have investigated the dissociative photoionization of shallow-core excited CCl3SCl by using multicoincidence time-of-flight mass spectrometry and synchrotron radiation in the S 2p and Cl 2p edges. The relative abundances of the ionic fragments and their kinetic energy release values were obtained from both PEPICO (photoelectron photoion coincidence) and PEPIPICO (photoelectron photoion photoion coincidence) spectra. The dynamic of the ionic fragmentation of S and Cl 2p excited CCl3SCl has been studied and compared with those of CCl4. Features determined in the present study seem to be relevant aspects for explaining the dissociation of highly chlorinated species under the action of VUV irradiation. The fragmentation pattern shows that chlorine ion (Cl+) is prominently formed upon both S and Cl 2p excitations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Perchloromethyl Mercaptan, CCl₃SCl, Excited with Synchrotron Radiation in the Proximity of the Sulfur and Chlorine 2p Edges: Dissociative Photoionization of Highly Halogenated Species

et al. 2009

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“…Photodissociation of formaldehyde has been the subject of numerous theoretical and experimental studies (119)(120)(121)(122)(123)(124)(125)(126)(127)(128)(129)(130)(131)(132). It involves two decomposition and one isomerization channels: Downloaded by [George Mason University] at 02: 43 28 September 2014 whereas the isomerization of CH 2 O produces hydroxycarben, HCOH (125,126), the unimolecular decomposition generates H 2 +CO molecular and H • +HC • O radical products.…”

Section: Dehydrogenation Of Formaldehydementioning

confidence: 98%

Dihydrogen Catalysis: A Remarkable Avenue in the Reactivity of Molecular Hydrogen

Asatryan

Ruckenstein

2014

Catalysis Reviews

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Molecular hydrogen is the simplest and most abundant compound in the universe and is involved in numerous industrial chemical processes. In conventional chemistry, dihydrogen typically plays the role of a reductant and a reagent for homogeneous and heterogeneous hydrogenation processes such as the industrial and enzymatic ammonia formation, reduction of metallic ores and hydrogenation of unsaturated fats and oils. However, there are also processes in which molecular hydrogen participates as promoter, and even as catalyst. The catalytic role of the dihydrogen in free-valence migration in irradiated polymers and the interstellar isomerization of the formyl cation (protonated carbon monoxide) are well-documented examples of such processes. Recently, this issue has received new attention. Dihydrogen has been shown to play the role of a dehydrogenation catalyst (involving particularly metallocomplexes and inorganic materials), a relay (pass-on) transfer molecular agent and a transporter of protons.This review article, combined with original results, is focused on the mechanisms of the chemical processes where dihydrogen demonstrates catalytic behavior. We will call these processes (with somewhat broader meaning of the term) "dihydrogen catalysis" (DHC) which also includes the reactions mediated by transition metal dihydrides. Dihydrides are tentatively considered as pre-activated dihydrogen, coordinated to a metal center or implanted into a solid surface/support. DHC reactions are classified into five major reaction types: (i) dihydrogen-assisted relay transport of H-atoms (H2-RT); (ii) dihydrogen-assisted stepwise relay transport of H-atoms or of a free valence (sH2-RT); (iii) dihydrogen-assisted proton transport (H2-PT); (iv) dihydrogen-assisted dehydrogenation (H2-DeH); and (v) pre-activated dehydrogenation (PA-DeH). The classification of these mechanisms is Color versions of one or more of the figures in the article can be found online at www. tandfonline.com/lctr. 403 Downloaded by [George Mason University] at 02:43 28 September 2014 R. Asatryan and E. Ruckensteinbased on a detailed analysis of numerous potential energy surfaces studied by DFT and ab initio methods in conjunction with available experimental data. The H2-RT, H2-DeH, and PA-DeH processes occur via cyclic transition states. The relay H2-RT transport involves the H-H-H triad linked to both H-donor and H-acceptor centers, whereas the transition state ring in the H2-DeH dehydrogenation processes involves a H-H-H-H tetrad with the dihydrogen catalyst located in the middle. The H2-PT mechanism provides the transport of a proton mediated by dihydrogen combined in a triangular (H 3 + )-carrier unit. There are also practically important processes stimulated by dihydrogen such as the hydrogen spillover and hydrogen build-up in electronics, in which the catalytic role of dihydrogen is ambiguous, either because of the uncertainties in mechanisms, or prevailing traditional views. Some examples are briefly discussed in the framework of the concept of dihydrogen ...

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“…Investigated processes: c -coagulation of molecules on/in the cluster, x -non-coagulation, s pu -pickup cross section, a S -surface accommodation coefficient, i + -reactions after electron ionization, hn -reactions after UV photon excitation/ionization, e À -electron attachment and negative ion reactions of the simplest chemical reactions. 210,211 The effect of a solvent on the photodissociation is of prime importance for understanding the chemistry in bulk systems irradiated by UV photons. 212,213 With this motivation the photodissociation of molecules in rare gas clusters was investigated.…”

Section: Photodissociation Of Molecules On Clustersmentioning

confidence: 99%

Pickup and reactions of molecules on clusters relevant for atmospheric and interstellar processes

Fárnı́k

Fedor

Kočišek

et al. 2021

Phys. Chem. Chem. Phys.

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4 Photodissociation in the gas phase

Cited by 5 publications

References 121 publications

Perchloromethyl Mercaptan, CCl₃SCl, Excited with Synchrotron Radiation in the Proximity of the Sulfur and Chlorine 2p Edges: Dissociative Photoionization of Highly Halogenated Species

Perchloromethyl Mercaptan, CCl₃SCl, Excited with Synchrotron Radiation in the Proximity of the Sulfur and Chlorine 2p Edges: Dissociative Photoionization of Highly Halogenated Species

Dihydrogen Catalysis: A Remarkable Avenue in the Reactivity of Molecular Hydrogen

Pickup and reactions of molecules on clusters relevant for atmospheric and interstellar processes

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4 Photodissociation in the gas phase

Cited by 5 publications

References 121 publications

Perchloromethyl Mercaptan, CCl3SCl, Excited with Synchrotron Radiation in the Proximity of the Sulfur and Chlorine 2p Edges: Dissociative Photoionization of Highly Halogenated Species

Perchloromethyl Mercaptan, CCl3SCl, Excited with Synchrotron Radiation in the Proximity of the Sulfur and Chlorine 2p Edges: Dissociative Photoionization of Highly Halogenated Species

Dihydrogen Catalysis: A Remarkable Avenue in the Reactivity of Molecular Hydrogen

Pickup and reactions of molecules on clusters relevant for atmospheric and interstellar processes

Contact Info

Product

Resources

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Perchloromethyl Mercaptan, CCl₃SCl, Excited with Synchrotron Radiation in the Proximity of the Sulfur and Chlorine 2p Edges: Dissociative Photoionization of Highly Halogenated Species

Perchloromethyl Mercaptan, CCl₃SCl, Excited with Synchrotron Radiation in the Proximity of the Sulfur and Chlorine 2p Edges: Dissociative Photoionization of Highly Halogenated Species