Picosecond Spectroscopy of Polar Dye Solutions at Antistokes Excitation

摘要

In this article, the process of orientational rearrangement of solvates in solutions of complex organic molecules at room temperature is studied using the method of picosecond spectroscopy. With the excitation of an ethanol solution of unsubstituted rhodamine by a single picosecond pulse, at the first moment amplification was observed with a spectrum displaced to the red region by 6 nm compared to its usual position. In 350 picoseconds after the excitation, there was a displacement of the spectrum to the blue region, corresponding to orientational relaxation of the solvate. (ERA citation 81:025995)