Structure And Dynamics Of Molecular Clusters Via High Resolution IR Absorption Spectroscopy

David J. Nesbitt

doi:10.1117/12.966898

1 January 1987 Structure And Dynamics Of Molecular Clusters Via High Resolution IR Absorption Spectroscopy

David J. Nesbitt

Proceedings Volume 0742, Laser Applications to Chemical Dynamics; (1987) https://doi.org/10.1117/12.966898
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

Abstract

The combination of high resolution (<10^-3 cm^-1) cw tunable difference frequency generation (2.2-4.2 μm) with high sensitivity (10^-6/√Hz) long path length absorption methods in pulsed slit supersonic jets has permitted spectroscopic investigation of many weakly bound molecular complexes. Discussion will focus on three complementary areas of experimentation. 1) Cluster formation in the molecular beam is probed via sub-Doppler, velocity resolved absorption profiles of monomer species. Spatially dependent beam clustering is strongly manifested through loss of monomer absorption intensity at line center. 2) IR spectra of simple van der Waals molecules such as ArHF are obtained in the υ₁ HF stretching region. Information on all modes in the complex is extracted. 3) IR spectra of hydrogen bonded complexes such as HFCO₂ are observed which exhibit large changes in average molecular geometry as a function of vibrational state. Surprisingly low intermolecular bending frequencies are evidenced in the spectra via hot bands, and provide dynamical information on coupled vibrational-rotational motion in floppy molecular systems.

Citation Download Citation

David J. Nesbitt "Structure And Dynamics Of Molecular Clusters Via High Resolution IR Absorption Spectroscopy", Proc. SPIE 0742, Laser Applications to Chemical Dynamics, (1 January 1987); https://doi.org/10.1117/12.966898

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available