INFRARED SPECTRAL HOLE BURNING OF 1:1 HYDROGEN-BONDED COMPLEXES IN SOLUTION*

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