Dephasing effects on the ultrafast transient hole-burning spectrum of a nonpolar solute and solvent molecular system are theoretically studied on the basis of an indirect dephasing model. The relative intensity of the transient hole-burning spectrum derived is characterized by a Lorentzian function
Solvent relaxation effect on transient hole-burning spectra of organic dyes
β Scribed by S. Kinoshita; H. Itoh; H. Murakami; H. Miyasaka; T. Okada; N. Mataga
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 439 KB
- Volume
- 166
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Picosecond transient absorption spectra of organic dyes in solution are measured at room temperature. When a dye molecule is dissolved in viscous solvents, a transient spectrum initially shows a slightly sharp hole around the exciting energy, accompanied by the time-dependent broadening of its shape.
π SIMILAR VOLUMES
The dye molecule in a saturated hydrocarbon solvent (instead of the vacuum) is taken as reference state: the a-electrons of solute and solvent are treated as a continuous medium of dielectric constant E o = 2. The n-electrons of the solute are assumed to be immersed in this medium. Solvent shifts O:
The influence of impurity concentration on excitation and emission spectra, fluorescence decay rates and persistent spectral hole-burning parameters is reported for porphyrin dye molecules in a Langmuir-Blodgett film host. A shift of the fluorescence band and non-exponential radiative decay in heavi
The modulation Stark spectroscopy method is applied to study the main characteristics of holes burnt by a hscr in inhomogeneously broadened absorption spectra of octaethylchlorin in thin polymer films at 4.2 K The method used is charactcriscd by high scnsitivity,it allows us to detect holes with dep