Interactions of Slow Electrons with Benzene and Benzene Derivatives

Christophorou, L. G.; Grant, MW; McCorkle, D.L.

doi:10.1002/9780470142554.ch6

Cited by 42 publications

(11 citation statements)

References 119 publications

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“…1-8 (bottom right panels) report the measured mean autodetachment lifetimes of the molecular NIs. The present results are in reasonable agreement with previously published data [14]. The lifetimes (τ AD (E max )) given in Table 3 refer to the maximum of the M − peak (given in parentheses).…”

Section: Low-resolution Dea Spectrasupporting

confidence: 93%

“…Long-lived parent NIs (M − ) were also found. These results are in agreement within an order of magnitude with earlier data [13,14]. The intensity of F − fragments anions in the spectra of the fluoro derivatives was too small (if any) to be detected.…”

Section: High-resolution Dea Spectrasupporting

confidence: 92%

“…Estimated zero electron energy lifetimes (τ AD (0)) are also listed. As shown by Christophorou et al [12][13][14] the lifetime decreases exponentially with increasing energy. So, comparison of the lifetimes extrapolated to zero energy seems to be more correct.…”

Section: Low-resolution Dea Spectramentioning

confidence: 75%

“…DEAS information on nitrobenzene derivatives [5,12,13] is rather scarce, although in the 1970s Christophorou et al [14] measured the lifetime of the parent anion formed at zero energy in a variety of nitrobenzene derivatives and elaborated a semiempirical theory for the autodetachment decay of parent negative ions [15]. This approach, however, requires knowledge of the electron attachment cross section.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Temporary anion states and dissociative electron attachment to nitrobenzene derivatives

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Pshenichnyuk

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et al. 2007

International Journal of Mass Spectrometry

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Section: Low-resolution Dea Spectrasupporting

confidence: 93%

Section: High-resolution Dea Spectrasupporting

confidence: 92%

Section: Low-resolution Dea Spectramentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temporary anion states and dissociative electron attachment to nitrobenzene derivatives

Asfandiarov

Pshenichnyuk

Lukin

et al. 2007

International Journal of Mass Spectrometry

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“…³×ÑÓÏÖÎËÓÑÄÂÐÑ ÒÑÐâÕËÇ "×ÂÍÕÑÓÂ ÄÞÉËÄÂ-ÐËâ", ÑÒÓÇAEÇÎâáÜÇÅÑ ÔÑÑÕÐÑÛÇÐËÇ ÍÑÐÍÖÓËÓÖáÜËØ ÍÂ-ÐÂÎÑÄ ÓÂÔÒÂAEÂ ì ÂÄÕÑÑÕÜÇÒÎÇÐËâ Ë AEËÔÔÑÙËÂÙËË, ÒÑÎÖ-ÚÇÐÑ ÕÇÑÓÇÕËÚÇÔÍÑÇ ÄÞÓÂÉÇÐËÇ AEÎâ ÔÇÚÇÐËâ s ÊÂØÄÂÕÂ àÎÇÍÕÓÑÐÂ ÏÑÎÇÍÖÎÑÌ [18]. ªÊÏÇÓÇÐÐÞÇ ÊÐÂÚÇÐËâ t a ÔÑ-ÔÕÂÄËÎË ÑÔÐÑÄÖ ÏÑAEÇÎÇÌ, ÖÚËÕÞÄÂáÜËØ ÓÑÎß ÄÑÎÐÑÄÑÌ ×ÖÐÍÙËË âAEÇÓÐÑÌ ÒÑAEÔËÔÕÇÏÞ ÔËÔÕÇÏÞ ÏÑÎÇÍÖÎÂ ë àÎÇÍÕ-ÓÑÐ, ËÊÏÇÐÇÐËâ ÍÑÐ×ËÅÖÓÂÙËË âAEÇÓ Ä ÒÓÑÙÇÔÔÇ àÄÑÎáÙËË ÑÕÓËÙÂÕÇÎßÐÑÅÑ ËÑÐÂ ÒÑÔÎÇ ÇÅÑ ÑÃÓÂÊÑÄÂÐËâ, ÔÑÑÕÐÑÛÇ-ÐËâ àÎÇÍÕÓÑÐÐÞØ ÕÇÓÏÑÄ ËÑÐÂ Ë ÏÂÕÇÓËÐÔÍÑÌ ÏÑÎÇÍÖÎÞ [4,7,8] It is well known that negative ions that form in the gas phase due to low-energy electron capture by molecules show a scatter in the measured lifetimes of their autodetachment states. In considering this problem, it is found that when using a static sector magnetic mass spectrometer, some of the ions that form on the ionization chamber walls are adsorbed and stabilized there and then join the registered ion êow, thereby distorting the measured lifetime.…”

mentioning

confidence: 99%

Negative ion adsorption by the ion source surface as a factor influencing ion lifetime measurements

Lukin¹,

Khvostenko²

2017

Успехи физических наук

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ÓÂÔÔÏÑÕÓÇÐËâ ËÊÖÚÇÐÞ ÓÂÊÎËÚÐÞÇ ÂÔÒÇÍÕÞ ÒÓÑÙÇÔÔÂ ²©¿, ÕÂÍËÇ ÍÂÍ ÄÊÂËÏÑAEÇÌÔÕÄËÇ AEËÔÍÓÇÕÐÑÅÑ Ë ÔÒÎÑÛÐÑÅÑ ÔÒÇÍÕÓÑÄ Ô ÄÞØÑAEÑÏ ÐÂ ÄÇÎËÚËÐÖ ÄÓÇÏÇÐË ÉËÊÐË t a ËÑÐÂ a M À ÑÕÐÑÔËÕÇÎßÐÑ ÂÄÕÑÑÕÜÇÒÎÇÐËâ AEÑÃÂÄÑÚÐÑÅÑ àÎÇÍÕ-ÓÑÐÂ [11]. ³×ÑÓÏÖÎËÓÑÄÂÐÑ ÒÑÐâÕËÇ "×ÂÍÕÑÓÂ ÄÞÉËÄÂ-ÐËâ", ÑÒÓÇAEÇÎâáÜÇÅÑ ÔÑÑÕÐÑÛÇÐËÇ ÍÑÐÍÖÓËÓÖáÜËØ ÍÂ-ÐÂÎÑÄ ÓÂÔÒÂAEÂ ì ÂÄÕÑÑÕÜÇÒÎÇÐËâ Ë AEËÔÔÑÙËÂÙËË, ÒÑÎÖ-ÚÇÐÑ ÕÇÑÓÇÕËÚÇÔÍÑÇ ÄÞÓÂÉÇÐËÇ AEÎâ ÔÇÚÇÐËâ s ÊÂØÄÂÕÂ àÎÇÍÕÓÑÐÂ ÏÑÎÇÍÖÎÑÌ [18]. ªÊÏÇÓÇÐÐÞÇ ÊÐÂÚÇÐËâ t a ÔÑ-ÔÕÂÄËÎË ÑÔÐÑÄÖ ÏÑAEÇÎÇÌ, ÖÚËÕÞÄÂáÜËØ ÓÑÎß ÄÑÎÐÑÄÑÌ ×ÖÐÍÙËË âAEÇÓÐÑÌ ÒÑAEÔËÔÕÇÏÞ ÔËÔÕÇÏÞ ÏÑÎÇÍÖÎÂ ë àÎÇÍÕ-ÓÑÐ, ËÊÏÇÐÇÐËâ ÍÑÐ×ËÅÖÓÂÙËË âAEÇÓ Ä ÒÓÑÙÇÔÔÇ àÄÑÎáÙËË ÑÕÓËÙÂÕÇÎßÐÑÅÑ ËÑÐÂ ÒÑÔÎÇ ÇÅÑ ÑÃÓÂÊÑÄÂÐËâ, ÔÑÑÕÐÑÛÇ-ÐËâ àÎÇÍÕÓÑÐÐÞØ ÕÇÓÏÑÄ ËÑÐÂ Ë ÏÂÕÇÓËÐÔÍÑÌ ÏÑÎÇÍÖÎÞ [4,7,8] It is well known that negative ions that form in the gas phase due to low-energy electron capture by molecules show a scatter in the measured lifetimes of their autodetachment states. In considering this problem, it is found that when using a static sector magnetic mass spectrometer, some of the ions that form on the ionization chamber walls are adsorbed and stabilized there and then join the registered ion êow, thereby distorting the measured lifetime. Because the number of the adsorbed ions depends on the experimental conditions, their contribution to the total êow is to some extent uncontrollable ì hence the scatter.

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Relationship of moleculated radical anion abundance and calculated lowest unoccupied molecular orbital energies for polychlorinated dibenzofurans and dibenzodioxins in electron capture negative ion mass spectrometry: Evidence for negative metastable ions

Chang

et al. 1988

Biol. Mass Spectrom.

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Relationships were found between experimentally measured molecular radical anion abundances and calculated lowest unoccupied molecular orbital energies (epsilon LUMO) for polychlorodibenzofurans and polychlorodibenzo-p-dioxins. Anion abundances were measured using standard mass spectrometric techniques, while epsilon LUMO were calculated by the 'Complete Neglect of Differential Overlap' method. Polychlorodibenzofurans with calculated epsilon LUMO greater than or equal to 1.6 eV show 0% molecular radical anion and those with epsilon LUMO less than or equal to 1.4 eV show greater than or equal to 80% molecular radical anion abundance. Similarly, the molecular radical anion is absent for polychlorodibenzo-p-dioxins with calculated epsilon LUMO greater than or equal to 2.0 eV. A trend towards greater molecular radical ion relative abundance appears for 2.0 eV greater than or equal to epsilon LUMO greater than or equal to 1.0 eV and a maximum is reached around 1 eV, whereupon the molecular ion abundance diminishes with lower epsilon LUMO. B/E linked scan analysis indicates that chlorodioxins with epsilon LUMO less than 1 eV give increasing amounts of metastable anions.

show abstract

Interactions of Slow Electrons with Benzene and Benzene Derivatives

Cited by 42 publications

References 119 publications

Temporary anion states and dissociative electron attachment to nitrobenzene derivatives

Temporary anion states and dissociative electron attachment to nitrobenzene derivatives

Negative ion adsorption by the ion source surface as a factor influencing ion lifetime measurements

Relationship of moleculated radical anion abundance and calculated lowest unoccupied molecular orbital energies for polychlorinated dibenzofurans and dibenzodioxins in electron capture negative ion mass spectrometry: Evidence for negative metastable ions

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