Atmospheric pressure anion mass spectrometry: electron affinities and activation energies of thermal electron attachment – perfluoromethylcyclohexane, C₇F₁₄

Abstract

There are multiple anions of c-C6 F11 -CF3 more stable than the neutral. Electron-capture detection and atmospheric pressure negative ion mass spectrometry are effective general methods for determining multiple electron affinities similar to the photodetachment, flowing afterglow, magnetron, negative surface ionization, swarm and beam procedures. Semi-empirical theoretical calculations support experimental results. Additional mass analysis studies of reactions of c-C6 F11 -CF3 with electrons over a wide range of temperatures, pressures and electron energies are desirable.

Mass spectrometric determination of Morse parameters for the fifty-four superoxide states dissociating to the lowest limit

“…The HIMPEC for the 54 superoxide spin states in Fig. are improvements over the previous literature curves, and support the theoretical predictions of the 90 superoxide states and recent communications in this journal presenting HIMPEC for multiple anion states of SF 6 and C 7 F 14 from the temperature dependence of our APIMS data and literature surface ionization, beam and flowing afterglow data . The dramatic temperature dependence of the O – distributions cannot be explained by the 54 states shown in Fig.…”

Comment on: Negative ions, molecular electron affinity and orbital structure of cata‐condensed polycyclic aromatic hydrocarbons by Rustem V. Khatymov, Mars V. Muftakhov and Pavel V. Shchukin

“…The ionization energy of hexacene in the NIST database 6.36 (2) eV and that of naphtho[1,2‐b]triphenylene 7.40 (2) eV give AE a = EN‐IE of 8.00 − 6.36 = 1.64 eV and 8.00 − 7.40 = 0.60 eV, in agreement with the reported AE a values of 1.58 (5) eV and 0.61 (3) eV from half‐wave reduction potentials . Finally, it is suggested that, assuming that thermal decomposition does not take place, the ground state AE a of hexacene and pentacene could be measured from high‐temperature mass spectrometric thermal data as applied to SF 6 and C 7 F 14 …”

“…The ionization energy of hexacene in the NIST database 6.36 (2) eV and that of naphtho [ Table 1 [Color figure can be viewed at wileyonlinelibrary.com] thermal decomposition does not take place, the ground state AE a of hexacene and pentacene could be measured from high-temperature mass spectrometric thermal data as applied to SF 6 and C 7 F 14 . 20,23 ORCID Edward S. Chen http://orcid.org/0000-0003-3040-7816…”

“…In 2004, the electron affinities in the NIST database were reviewed . Since 2004, several negative ion mass spectrometric studies have been carried out on AHC or other compounds so it is pertinent to revisit the ECD data . This communication provides ground state AE a from ECD or other data for the 15 compounds listed in Table , to be used for comparison with mass spectrometric data.…”

“…3,13 Since 2004, several negative ion mass spectrometric studies have been carried out on AHC or other compounds so it is pertinent to revisit the ECD data. 1,2,5,6,[14][15][16][17][18][19][20][21][22][23] This communication provides ground state AE a from ECD or other data for the 15 compounds listed in Table 1, to be used for comparison with mass spectrometric data. FIGURE 1 Structures of tri-tetra and pentacyclic aromatic hydrocarbons and electron affinities from the NIST database 4 and for phenanthrene 5,6 properties for thermal electron attachment reactions to multiple states was reviewed in 2004.…”