Site-specific fragmentation caused by Si:1s core-level photoionization of F3SiCH2CH2Si(CH3)3 vapor

Nagaoka, Shin‐ichi; Tamenori, Y.; Hino, Masayuki; Kakiuchi, Takuhiro; Ohshita, Joji; Okada, Kazumasa; Ibuki, Toshio; Suzuki, Isao

doi:10.1016/j.cplett.2005.07.044

Cited by 19 publications

(21 citation statements)

References 20 publications

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“…More generally, x-ray photoionization proceeds via electron promotion into the continuum and relaxation by Auger decay. Experimentally this process has been studied [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] with electron-ion coincidence methods. Site-selectivity is obtained by exciting or ionizing atoms of different elements [10][11][12]22 or, for atoms of same elements, by using site-specific chemical shifts in a variety of medium-sized carbon 9,17,18,20,24,25 and silicon-containing 13,16,19 molecules.…”

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confidence: 99%

“…Experimentally this process has been studied − with electron–ion coincidence methods. Site selectivity is obtained by exciting or ionizing atoms of different elements − , or, for atoms of same elements, by using site-specific chemical shifts in a variety of medium-sized carbon ,,,,, and silicon-containing ,, molecules. For most of these molecules, only a relatively small fraction of the total ion yields is specific to the ionization site.…”

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confidence: 99%

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Chemical Understanding of the Limited Site-Specificity in Molecular Inner-Shell Photofragmentation

Inhester

Oostenrijk

Patanen

et al. 2018

J. Phys. Chem. Lett.

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In many cases fragmentation of molecules upon inner-shell ionization is very unspecific with respect to the initially localized ionization site. Often this finding is interpreted in terms of an equilibration of internal energy into vibrational degrees of freedom after Auger decay. We investigate the X-ray photofragmentation of ethyl trifluoroacetate upon core electron ionization at environmentally distinct carbon sites using photoelectron-photoion-photoion coincidence measurements and ab initio electronic structure calculations. For all four carbon ionization sites, the Auger decay weakens the same bonds and transfers the two charges to opposite ends of the molecule, which leads to a rapid dissociation into three fragments, followed by further fragmentation steps. The lack of site specificity is attributed to the character of the dicationic electronic states after Auger decay instead of a fast equilibration of internal energy.

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Chemical Understanding of the Limited Site-Specificity in Molecular Inner-Shell Photofragmentation

Inhester

Oostenrijk

Patanen

et al. 2018

J. Phys. Chem. Lett.

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“…17 carried out a study on ozone, and Nagaoka et al [18][19][20] investigated the dissociation of some trihalosilyltrimethylsilyl-compounds upon core ionisation of the silicon 1s and 2p inner shells. Site-specific photochemistry arising from initial ionisation at the allimportant carbon atoms of organic molecules was studied by Itälä et al 21 for the case of pyrimidine and by some of us 22 for the case of ethyl trifluoroacetate.…”

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

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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.

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“…Excitation of molecules at the K-shell level has attracted much attention for the last three decades, because site-specific fragmentation processes were observed in various molecular systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Inner-shell excited or ionized molecules dissociate into fragment ions following Auger electron emission.…”

Section: Introductionmentioning

confidence: 99%

Specific fragmentation of the K-shell excited/ionized aniline molecule studied by electron impact

Okada

Kashiwagi

Sakai

2013

International Journal of Mass Spectrometry

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Site-specific fragmentation caused by Si:1s core-level photoionization of F3SiCH2CH2Si(CH3)3 vapor

Cited by 19 publications

References 20 publications

Chemical Understanding of the Limited Site-Specificity in Molecular Inner-Shell Photofragmentation

Chemical Understanding of the Limited Site-Specificity in Molecular Inner-Shell Photofragmentation

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

Specific fragmentation of the K-shell excited/ionized aniline molecule studied by electron impact

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