Journal ArticleDOI
Spectral diffusion of a photochemical proton transfer system in an amorphous organic host: Quinizarin in alcohol glass
TLDR
In this paper, the authors describe the time evolution of photochemical holes in organic glasses, showing a logarithmic increase of the hole widths in a time domain between minutes and about 104 min.Abstract:
Experimental data describing the time evolution of photochemical holes in organic glasses are reported. The photochemical system is 1,4‐dihydroxyanthraquinone (quinizarin) in ethanol/methanol glasses; its photochemistry is based on proton or deuteron transfer processes. The experiments show a logarithmic increase of the hole widths in a time domain between minutes and about 104 min. The experimental results yield a pronounced deuteration effect and little variation with temperature between 1.35 and 4.2 K. The data are interpreted in a semiquantitative way using current theories of spectral diffusion in amorphous solids. The fastest measured photochemical rates are on the order of seconds, leaving a ‘‘time independent’’ linewidth of about 0.4 cm−1 at 1.35 K.read more
Citations
More filters
Journal ArticleDOI
Dynamics in low temperature glasses: Theory and experiments on optical dephasing, spectral diffusion, and hydrogen tunneling
TL;DR: In this article, temperature dependent photon echo (PE) and nonphotochemical hole burning (NPHB) measurements were reported on resorufin in three organic glasses: ethanol (1.5 −11 K), glycerol (1 −1 −25 K), and d−ethanol (1−1−11 K).
Journal ArticleDOI
Structure and Dynamics in Solids As Probed by Optical Spectroscopy
James L. Skinner,W. E. Moerner +1 more
TL;DR: The spectral properties of individual single impurity molecules in a solid can be measured, with all ensemble averaging removed as discussed by the authors, which has provided additional information on a highly local scale, such as the direct observation of the spectral shifting of a single molecule.
Book ChapterDOI
Models for Reaction Dynamics in Glasses
TL;DR: In this paper, a local probe of the glass structure, be it an elementary particle (neutron), a trapped charge carrier (electron or hole) or an impurity (ion or sensibilizing molecule) senses not only the different geometry of its surroundings, but, because of it, also changes in the local potentials.
Journal ArticleDOI
A picosecond photon echo study of a chromophore in an organic glass: Temperature dependence and comparison to nonphotochemical hole burning
TL;DR: In this article, the first two-pulse photon echo experiments on a chromophore in an organic glass were reported, and the homogeneous electronic dephasing of resorufin in ethanol glass was measured from 1.5-11.4 K.
Journal ArticleDOI
Vibrational spectral diffusion and population dynamics in a glass-forming liquid: Variable bandwidth picosecond infrared spectroscopy
TL;DR: In this article, temperature-dependent vibrational population dynamics and spectral diffusion of the CO stretching mode of tungsten hexacarbonyl in 2-methylpentane were observed from the room temperature liquid to the low temperature glass using picosecond infrared transient grating and pump-probe experiments.
References
More filters
Journal ArticleDOI
Anomalous low-temperature thermal properties of glasses and spin glasses
TL;DR: In this article, a linear specific heat at low temperatures for glass follows naturally from general considerations on the glassy state, and the experimentally observed anomalous low-temperature thermal conductivity is predicted.
Book
The tunnel effect in chemistry
R. P. Bell,Robert J. Le Roy +1 more
TL;DR: In this article, the authors present a review of the present position of the tunnel correction for a parabolic barrier and the application of tunnel corrections in chemical kinetics, as well as the theory of kinetic isotope effects.
Journal ArticleDOI
Spectral Diffusion Decay in Spin Resonance Experiments
TL;DR: In this article, the authors show that the conditional distribution of the precessional frequency has the shape of a Lorentzian with a cutoff on the wings, rather than a Gaussian shape as commonly assumed.