Abstract
The first picosecond infrared vibrational echo experiments on a protein, myoglobin-CO, are described. The experiments were performed at temperatures ranging from 60 to 300 K with a midinfrared free electron laser tuned to 1945 cm-1. Below ∼185 K, the pure dephasing, T2*, displays a power law temperature dependence, T1.3. This behavior is reminiscent of that associated with the properties of low temperature glasses (<5 K) but is observed here at much higher temperatures. Above the solvent glass transition temperature, T2* is exponentially activated.
Original language | English (US) |
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Pages (from-to) | 1648-1651 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 77 |
Issue number | 8 |
DOIs | |
State | Published - 1996 |
ASJC Scopus subject areas
- Physics and Astronomy(all)