Photoionisation and structures of jet-formed toluene clusters

Palma, Tonia M. Di; Bende, Attila; Borghese, A.

doi:10.1016/j.cplett.2010.06.053

Cited by 14 publications

(23 citation statements)

References 29 publications

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“…It has been reported that toluene reacts with analyte ions as clusters . The literature also states that toluene can exist as clusters up to tetramers .…”

Section: Resultsmentioning

confidence: 99%

“…It has been reported that toluene reacts with analyte ions as clusters. [56][57][58][59] The literature also states that toluene can exist as clusters up to tetramers. [56,57] However, the toluene dimer is the more stable structure due to its electrostatic and dispersive interactions.…”

Section: Resultsmentioning

confidence: 99%

“…[56][57][58][59] The literature also states that toluene can exist as clusters up to tetramers. [56,57] However, the toluene dimer is the more stable structure due to its electrostatic and dispersive interactions. [58,59] Therefore, the toluene monomer and dimer were considered in this study although the literature states that the cluster does not contain only toluene, but also water molecules.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Correlation between experimental data of protonation of aromatic compounds at (+) atmospheric pressure photoionization and theoretically calculated enthalpies

Ahmed

Lim

Choi

et al. 2017

Rapid Comm Mass Spectrometry

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The data used in this study clearly show that the theoretically calculated reaction enthalpy (ΔH) of protonation with toluene dimers can be used to predict the protonation behavior of aromatic compounds. When compounds have a negative ΔH value, the types of ions generated for aromatic compounds could be very well predicted based on the ΔH value. The ΔH can explain overall protonation behavior of compounds with ΔH values >0. Copyright © 2017 John Wiley & Sons, Ltd.

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“…It has been reported that toluene reacts with analyte ions as clusters . The literature also states that toluene can exist as clusters up to tetramers .…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Correlation between experimental data of protonation of aromatic compounds at (+) atmospheric pressure photoionization and theoretically calculated enthalpies

Ahmed

Lim

Choi

et al. 2017

Rapid Comm Mass Spectrometry

View full text Add to dashboard Cite

show abstract

“…DiPalma et al have reported on the use and characterization of this method [54][55][56][57]. They have furthermore demonstrated its use to detect IPs of products of engine exhaust, with detection sensitivities comparable to VUV synchrotrons of *1 ppmv [55].…”

Section: Species Identificationmentioning

confidence: 96%

Post Discharge Chemistry of Aromatic Molecules in Rare Gas

Sulkes

2011

Plasma Chem Plasma Process

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We have employed 800 nm 150 fs laser pulses to carry out photoionization (PI) time-of-flight mass spectrometric detection of intermediates following corona discharges on aromatic molecules (alkylbenzenes and pyridine) in He, stabilized by subsequent supersonic gas expansions. Observed product peaks appear to be at least roughly in proportion to actual number densities; PI induced fragmentation of parent ions appears not to be excessive. Consequently, 800 nm fs PI should be useful for general product analysis applications in plasma chemistry. For most alkylbenzenes subjected to corona discharges in rare gas, the overall trends in product chemistry are similar in many respects to observed flame and pyrolysis chemistry in rare gases for the same species. Following discharge, as in those other cases, H deficient carbon radical fragments initially produced react in turn to form larger aromatic species. However, compared with flame/pyrolysis, discharge produced a larger number of fragment species, which can lead to a wider and somewhat different range of higher mass aromatic products. Co-addition of even a small component of O 2 to the discharge mixes has a potent effect in inhibiting formation of higher mass aromatic products in alkylbenzenes.

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“…The experimental set-up used for Na-doping measurements is a modified version of the one used for previous vacuum ultraviolet (VUV) experiments. [26][27][28][29][30][31] It is sketched in Fig. 1.…”

Section: Experimental Set-upmentioning

confidence: 99%

Encasing of Na⁺ ion in dimer‐formed acetic acid clusters

Palma

Bende

2015

J. Mass Spectrom.

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Peaks with anomalous abundance found in the mass spectra are associated with ions with enhanced stability. Among the scientific community focused on mass spectrometry, these peaks are called 'magic peaks' and their stability is often because of suggestive symmetric structures. Here, we report findings on ionised Na-acetic acid clusters [Na(+) -(AcA)n ] produced by Na-doping of (AcA)n and UV laser ionisation. Peaks labelled n = 2, 4, 8 are clearly distinguishable in the mass spectra from their anomalous intensity. Ab initio calculations helped elucidate cluster structures and energetic. A plausible interpretation of the magic peaks is given in terms of (AcA)n formed by dimer aggregation. The encasing of Na(+) by twisted dimers is proposed to be the origin of the enhanced cluster stability. A conceivable dimer-formed tube-like closed structure is found for the Na(+) -(AcA)8 .

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Photoionisation and structures of jet-formed toluene clusters

Cited by 14 publications

References 29 publications

Correlation between experimental data of protonation of aromatic compounds at (+) atmospheric pressure photoionization and theoretically calculated enthalpies

Correlation between experimental data of protonation of aromatic compounds at (+) atmospheric pressure photoionization and theoretically calculated enthalpies

Post Discharge Chemistry of Aromatic Molecules in Rare Gas

Encasing of Na⁺ ion in dimer‐formed acetic acid clusters

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Photoionisation and structures of jet-formed toluene clusters

Cited by 14 publications

References 29 publications

Correlation between experimental data of protonation of aromatic compounds at (+) atmospheric pressure photoionization and theoretically calculated enthalpies

Correlation between experimental data of protonation of aromatic compounds at (+) atmospheric pressure photoionization and theoretically calculated enthalpies

Post Discharge Chemistry of Aromatic Molecules in Rare Gas

Encasing of Na+ ion in dimer‐formed acetic acid clusters

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Encasing of Na⁺ ion in dimer‐formed acetic acid clusters