Site-Selective Photochemistry of Core Excited Molecules: Role of the Internal Energy

Miron, C.; Simon, M.; Leclercq, N.; Hansen, D. L.; Morin, Paul

doi:10.1103/physrevlett.81.4104

Cited by 78 publications

(58 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 6, a two dimensional map showing mass spectra against double ionization energy (hν -E 1 -E 2 ), reminds us that by far the most important factor determining the outcome of molecular fragmentation is the amount of energy deposited in the molecule or ion, as has been pointed out in previous studies of site selectivity [4]. The identity of the particular electronic state populated may also influence fragmentation behaviour, but we believe that this is a major effect only in very small molecules.…”

Section: Site-selective Photochemistrymentioning

confidence: 99%

“…Closely related techniques were later extended to a range of molecular targets, starting with halocarbons and zero-valent metal complexes by several teams [3][4][5][6][7][8]. In all these later works with the exception of that of de Brito et al [6,7] on ozone, site-specific excitations were created at atoms of different elements in the target molecules; detection of a single Auger electron then identifies the atom and also determines the energy deposited in the final singly-ionized state.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Homonuclear site-specific photochemistry by an ion–electron multi-coincidence spectroscopy technique

Eland

Linusson

Mucke

et al. 2012

Chemical Physics Letters

View full text Add to dashboard Cite

PostprintThis is the accepted version of a paper published in Chemical Physics Letters. This paper has been peerreviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Eland, J H., Linusson, P., Mucke, M., Feifel, R. (2012) Homonuclear site-specific photochemistry by an ion-electron multi-coincidence spectroscopy technique. Abstract By combining multi-particle coincidence detection of electrons and ions with ionization by soft X-ray synchrotron radiation we demonstrate an effective tool for atomic spectroscopy and sitespecific photochemistry. Its most novel capability is application to molecular fragmentation after K-shell vacancy production in atoms distinguished only by their chemical environment. Chemical Physics Letters

show abstract

Section: Site-selective Photochemistrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Homonuclear site-specific photochemistry by an ion–electron multi-coincidence spectroscopy technique

Eland

Linusson

Mucke

et al. 2012

Chemical Physics Letters

View full text Add to dashboard Cite

show abstract

“…If the breakdown pattern depends only on the ions' total internal energy content (as assumed in the statistical theory of mass spectra for a molecule of this size), then differences in mass spectra can be caused by differences in the energy deposition, that is by differences in the Auger spectra from vacancies on different atoms, defined by the overlap between the core hole and the valence orbital 6 . As known from the very recently investigated cases of acetone 22 , ethyl trifluoracetate 23 and acetaldehyde 24 , the Auger spectra from holes on different C atoms can be significantly different.…”

Section: Introductionmentioning

confidence: 99%

“…The photodissociation process has been widely studied using initial resonant core-electron excitation on atoms of different elements [5][6][7][8] in a process sometimes referred to as element-specific photochemistry, and on atoms of the same element but in different chemical environments [9][10][11][12] , which is referred to as site-specific photochemistry. The dissociation upon core ionisation is relatively less investigated.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of site-specific photochemistry following core-shell ionization of chemically inequivalent carbon atoms in acetaldehyde (ethanal)

Zagorodskikh

Eland

Zhaunerchyk

et al. 2016

The Journal of Chemical Physics

View full text Add to dashboard Cite

Citation for the original published paper (version of record):Zagorodskikh, S., Eland, J H., Zhaunerchyk, V., Mucke, M., Squibb, R J. et al. (2016) Mechanisms of site-specific photochemistry following core-shell ionization of chemically inequivalent carbon atoms in acetaldehyde (ethanal). Journal of Chemical PhysicsAccess to the published version may require subscription. N.B. When citing this work, cite the original published paper. Permanent link to this version:http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-301121Mechanisms of site-specific photochemistry following core-shell ionization of chemically inequivalent carbon atoms in acetaldehyde (ethanal) Site-specific fragmentation upon 1s photoionisation of acetaldehyde has been studied using synchrotron radiation and a multi-electron-ion coincidence technique based on a magnetic bottle. Experimental evidence is presented that bond rupture occurs with highest probability in the vicinity of the initial charge localisation and possible mechanisms are discussed. We find that a significant contribution to site-specific photochemistry is made by different fragmentation patterns of individual quantum states populated at identical ionisation energies.

show abstract

“…Since then, many studies have been performed on this topic in the gasphase [25][26][27][28][29][30] as well as on surfaces 22,[31][32][33][34] and site-specific bond breaking has been observed in both cases. Also, sitespecific fragmentation initiated by core ionization has been reported [35][36][37][38][39][40][41][42][43] .…”

Section: Introductionmentioning

confidence: 99%

Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation

Salén

Kamińska

Squibb

et al. 2014

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

PostprintThis is the accepted version of a paper published in Physical Chemistry, Chemical Physics -PCCP. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Salen, P., Kaminska, M., Squibb, R J., Richter, R., Alagia, M. et al. (2014) Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation. The fragmentation pattern of the peptide model system, N-methylacetamide, is investigated using ion time-of-flight (TOF) spectroscopy after resonant K-shell excitation. Corresponding near-edge X-ray absorption fine structure (NEXAFS) spectra recorded at high resolution at the C1s, N1s and O1s edges are presented. Analysis of the ion TOF data reveals a multitude of fragmentation channels and dissociation pathways. Comparison between the excitation of six different resonances in the vicinity of the C1s, N1s and O1s edges suggests evidence for site-selective bond breaking. In particular the breaking of the peptide bond and the N-C α bond show a clear correlation with resonant excitation at the N1s edge. Also, stronger tendencies towards site-selective bond breaking are found for the generation of single ions compared with ion pairs. Analysis of angular distributions of ions from breakage of the peptide bond yields a fragmentation time of < 400 fs.

show abstract

Site-Selective Photochemistry of Core Excited Molecules: Role of the Internal Energy

Cited by 78 publications

References 20 publications

Homonuclear site-specific photochemistry by an ion–electron multi-coincidence spectroscopy technique

Homonuclear site-specific photochemistry by an ion–electron multi-coincidence spectroscopy technique

Mechanisms of site-specific photochemistry following core-shell ionization of chemically inequivalent carbon atoms in acetaldehyde (ethanal)

Selectivity in fragmentation of N-methylacetamide after resonant K-shell excitation

Contact Info

Product

Resources

About