TY - JOUR

T1 - Vibrational Spectroscopy of the Water Dimer at Jet-Cooled and Atmospheric Temperatures

AU - Vogt, Emil

AU - Kjaergaard, Henrik G.

PY - 2022

Y1 - 2022

N2 - The vibrational spectroscopy of the water dimer provides an understanding of basic hydrogen bonding in water clusters, and with about one water dimer for every 1,000 water molecules, it plays a critical role in atmospheric science. Here, we review how the experimental and theoretical progress of the past decades has improved our understanding of water dimer vibrational spectroscopy under both cold and warm conditions. We focus on the intramolecular OH-stretching transitions of the donor unit, because these are the ones mostly affected by dimer formation and because their assignment has proven a challenge. We review cold experimental results from early matrix isolation to recent mass-selected jet expansion techniques and, in parallel, the improvements in the theoretical anharmonic models. We discuss and illustrate changes in the vibrational spectra of complexes upon increasing temperature, and the difficulties in recording and calculating these spectra. In the atmosphere, water dimer spectra at ambient temperature are crucial.

AB - The vibrational spectroscopy of the water dimer provides an understanding of basic hydrogen bonding in water clusters, and with about one water dimer for every 1,000 water molecules, it plays a critical role in atmospheric science. Here, we review how the experimental and theoretical progress of the past decades has improved our understanding of water dimer vibrational spectroscopy under both cold and warm conditions. We focus on the intramolecular OH-stretching transitions of the donor unit, because these are the ones mostly affected by dimer formation and because their assignment has proven a challenge. We review cold experimental results from early matrix isolation to recent mass-selected jet expansion techniques and, in parallel, the improvements in the theoretical anharmonic models. We discuss and illustrate changes in the vibrational spectra of complexes upon increasing temperature, and the difficulties in recording and calculating these spectra. In the atmosphere, water dimer spectra at ambient temperature are crucial.

KW - infrared

KW - intensities

KW - intermolecular modes

KW - OH-stretching transitions

KW - radiative transfer

U2 - 10.1146/annurev-physchem-082720-104659

DO - 10.1146/annurev-physchem-082720-104659

M3 - Review

C2 - 35044791

AN - SCOPUS:85128801960

VL - 73

SP - 209

EP - 231

JO - Annual Review of Physical Chemistry

JF - Annual Review of Physical Chemistry

SN - 0066-426X

ER -