Table of Contents
Laser Chemistry
Volume 19 (1999), Issue 1-4, Pages 1-10

Infrared Spectral Hole Burning of 1:1 Hydrogen-Bonded Complexes in Solution

1Department of Chemistry and Physics, Beaver College, Merck and Co., WP 38-3 P.O. Box 4, Westpoint PA 19486, Glenside 19038, PA, USA
2Dept. of Chemical Engineering, UCLA Los Angeles, CA, Naval Research Laboratory, Washington 20375, DC, USA
3Department of Chemistry, Stetson University, DeLand 32720, FL, USA
4Room B208 Building 221, Optical Technology Division, National Institute of Standards and Technology, Gaithersburg 20899-0001, MD, USA

Received 21 May 1997

Copyright © 1999 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Transient picosecond infrared (IR) spectra of the OH and NH-stretch (v=0–1) absorption bands of several hydrogen-bonded complexes have been investigated. Solutions of 1:1 complexes of weak acids (methanol, triethylsilanol and pyrrole, < 0.1 mol/dm3) and bases (acetonitrile, pyridine and tetrahydrofuran, < 2 mol/dm3) in CCl4 at 295 K were interrogated with IR excitation and broadband probing. Lorentzian-shaped absorption bands are uniformly bleached while those with near-Gaussian bandshapes produce transient spectral holes. These results indicate a base functionality and hydrogen-bond strength dependence for determining the broadening mechanisms of these absorptions.