Abstract
The vibrational echo experiment can have advantages in the study of solvation dynamics over its electronic and NMR analogs because it has high time resolution and it examines systems with relatively simple energy level structures. A limitation is that the broad width of a short pulse will cover both 0-1 and 1-2 vibrational transitions, which can complicate the data analysis. By frequency selecting the detection wavelength of the echo signal (frequency selected vibrational echoes), we can obtain information on dynamics from a true two-level system modulated by the solvent fluctuations [1]. Here using this method, we present a study of the temperature dependence of the vibrational dephasing of a metalloporphyrin-CO compound, RuTPPCOPy (TPP = 5,10,15,20-tetraphenylporphyrin, Py = pyridine), in a polymer glass, polymethylmethacrylate (PMMA), and a glass-forming liquid, 2-methyltetrahydrofuran (2-MTHF, glass transition temperature 86 K).
© 2002 Optical Society of America
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