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Chirality effects in gas-phase spectroscopy and photophysics of molecular and ionic complexes: contribution of low and room temperature studies

This review focuses on chirality effects in spectroscopy and photophysics of chiral molecules or protonated ions, and their weakly bound complexes, isolated in the gas phase. Low-temperature studies in jet-cooled conditions allow disentangling the different interactions at play and shed light on the ancillary interactions responsible for chiral recognition, like OH…π or CH…π, which would be blurred at room temperature. The consequences of these interactions on chiral recognition in condensed phase are described, as well as the influence of higher energy conformers, which can be accessed in room-temperature experiments. The role of kinetic effects and solvation in jet-cooled experiments is discussed. Last, examples of dramatic chirality effects in photo-induced dissociation are given.