2D scan	Two-dimensional scan
AILES	Advanced Infrared beamLine Exploited for Spectroscopy
B3LYP	Becke, 3-parameter, Lee-Yang-Parr
DFT	Density Functional Theory
ES	Excited State
FELIX	Free Electron Laser for Ir eXperiments
FT	Fourier Transform
GS	Ground State
HB	Hydrogen Bond
HF	Hartree–Fock
ip	in-plane
IR	InfraRed
MP2	Møller-Plesset perturbation theory at 2nd order
oop	out-of-plane
PES	Potential Energy Surface
REMPI	Resonance Enhanced MultiPhoton Ionisation
RMS	Root-Mean-Square
SOLEIL	Source Optimisée de Lumière d’Énergie Intermédiaire du LURE
S/N	Signal to Noise
UV	Ultra-Violet
ZBD	Zero Bias Detector