Direct observation of C60- nano-ion gas phase ozonation

Via ion mobility-mass spectrometry

Chenxi Li, Chris Hogan

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Improved methods to probe the reactivity of nano-ions, such as C60-, would find utility in nanochemistry, combustion chemistry, and in generally understanding the behavior of matter at the nanometer scale. We demonstrate that ion mobility-mass spectrometry (IM-MS) with a low-field differential mobility analyzer can be used to probe nano-ion reaction kinetics. We used the developed IM-MS approach to examine the gas phase reactivity of C60- ions with ozone at atmospheric pressure. Experimental results show that ozonation of C60- mainly leads to the formation of C60On-. The controlled reaction time within the ion mobility instrument enables calculation of ozonation reaction rates and assuming oxygen atoms are added sequentially, we find that the reaction rate between C60- and O3 is near the collision controlled limit. We propose an exponentially decaying reaction rate coefficient expression to describe ozonation leading to the addition of >20 oxygen atoms. At high ozone concentrations, CO or CO2 loss from C60On- is additionally observed.

Original languageEnglish (US)
Pages (from-to)10470-10476
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume21
Issue number20
DOIs
StatePublished - Jan 1 2019

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Ozonization
Mass spectrometry
mass spectroscopy
Gases
Ions
vapor phases
reaction kinetics
Reaction rates
ions
Ozone
ozone
oxygen atoms
reactivity
combustion chemistry
Oxygen
Atoms
probes
Carbon Monoxide
reaction time
Reaction kinetics

PubMed: MeSH publication types

  • Journal Article

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Direct observation of C60- nano-ion gas phase ozonation : Via ion mobility-mass spectrometry. / Li, Chenxi; Hogan, Chris.

In: Physical Chemistry Chemical Physics, Vol. 21, No. 20, 01.01.2019, p. 10470-10476.

Research output: Contribution to journalArticle

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