We present an overview of the interstellar medium, including physical and chemical
conditions, spectroscopic observations, and current challenges in characterizing interstellar …

We have modeled the states of hydrogenation and charge of polycyclic aromatic
hydrocarbons (PAHs) in diffuse clouds for molecules ranging from benzene up to species …

The prospect of studying state-to-state chemical reaction dynamics, with full control over all
of the reaction parameters, is becoming a reality for a small number of systems. Thanks to …

We present a merged-beams study of reactions between HD+ ions, stored in the Cryogenic
Storage Ring (CSR), and laser-produced ground-term C atoms. The molecular ions are …

The detection and characterization of free organic radicals has been one of the most
important challenges for mass spectrometry during the past 60 years, and, for decades, free …

Ion-neutral reactions are driving the formation of small molecules in the gas phase of
interstellar clouds, where hydrogen molecules and their ions are by far the most important …

Combining a temperature variable 22-pole ion trap with a cold effusive beam of neutrals,
rate coefficients k (T) have been measured for reactions of CO2+ ions with H, H2 and …

The reactions of CO, CO2, SO2, NO2, CS2, CN, C2N2, and C2H3 with H atoms and H2
molecules have been studied in a selected ion flow tube operated at 3005 K. The H atom …

The chemistry of the pyrene radical cation C16H10+ and its derivatives C16H9+ and
C16H11+ has been investigated in the gas phase using a flowing afterglow-selected ion …

We report measurements of the reactions of a number of hydrocarbon ions with atomic and
molecular hydrogen made using a selected ion flow tube (SIFT) operating at room …