Abstract
The sensitivity limitations of Fourier transform infrared (FTIR) spectroscopy for the detection of molecular clusters formed in rarefied gas expansions can be overcome by synchronizing intense gas pulses at a low duty cycle with rapid interferometer scans. This turns the broadband FTIR approach into a universal cluster spectroscopy tool applicable from the far (200 cm(-1)) to the near (8000 cm(-1)) IR. It nicely complements more selective and more restricted laser-based techniques and it provides a gas-phase variant of the matrix-isolation method, the main drawback being substance consumption. A survey over the capabilities, limitations and perspectives of this high-throughput nozzle approach to cluster FTIR spectroscopy is given.
Highlights
The structure and motion of molecular clusters are revealed in much depth by vibrational spectroscopy.[1]
Fourier transform infrared (FTIR) absorption spectroscopy records the interferogram of a broadband light source as a function of optical path difference between the two interferometer arms, either continuously or step-by-step, in the presence and absence of an inserted sample
The less subtle case of direct complexation of CQC bonds by hydride groups remains to be explored in the CQC-stretching fundamental range by pulsed jet-FTIR techniques, whereas it has been studied in the gas phase.[130,131]
Summary
Some dynamical information,[2] no permanent dipole moment is required. Thin seeded supersonic jet expansions required for Martin Suhm completed a Chemistry degree at the University of Karlsruhe (1985). Pre- and post-doctoral stays involved Canberra and Boulder/CO, the habilitation was obtained in Zurich (1995). With 1–6 papers in each volume of PCCP so far, he has been trying to advocate the power and versatility of linear infrared and. Raman spectroscopy in elucidating intermolecular dynamics and in benchmarking quantum chemistry tools. This Perspective builds on his very first PCCP paper in volume 1 (1999)
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