Despite the generally hostile nature of the environments involved, chemistry does occur in
space. Molecules are seen in environments that span a wide range of physical and chemical …

In this review, we present an overview of our recent work on the infrared spectroscopy of
mass-selected gas-phase molecular ions. The ions are stored and isolated in a quadrupole …

Calculations are carried out using density functional theory (DFT) to determine the harmonic
frequencies and intensities of the neutrals and cations of 13 polycyclic aromatic …

ABSTRACT A significantly updated version of the NASA Ames PAH IR Spectroscopic
Database, the first major revision since its release in 2010, is presented. The current version …

The astronomical emission features, formerly known as the unidentified infrared bands, are
now commonly ascribed to polycyclic aromatic hydrocarbons (PAHs). The laboratory …

A Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer has been installed
at a free electron laser (FEL) facility to obtain infrared absorption spectra of gas phase ions …

Infrared spectroscopy of a variety of interstellar sources shows strong mid-IR emission
bands, which are generally attributed to emission from highly vibrationally excited polycyclic …

We present an on-line database of computed molecular properties for a large sample of
polycyclic aromatic hydrocarbons in four charge states:− 1, 0,+ 1, and+ 2. At present our …

The astronomical emission features, formerly known as the unidentified infrared bands, are
now commonly ascribed to polycyclic aromatic hydrocarbons (PAHs). The laboratory …

The origins of matrix isolation spectroscopy can be traced to the early experiments of
Vegard, beginning in the early 1920s. 1 Vegard bombarded condensed rare gases or …