Picosecond molecular relaxations during electron solvation in liquid alcohol and alcohol-alkane solutions

✍ Scribed by G.A. Kenney-Wallace; C.D. Jonah

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 445 KB
• Volume: 39
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(76)80339-9

✦ Synopsis

The time evolution of the sokated electron in a series of linear aicohok has been measured. A correlation between the time for monomer rotation TV and the solvation time r, seems to hold for the series. The mechanism of salvation is discussed with reference to the experimental data. J Following the fust obseI_rlation of the optical absorption of hydrated electrons in th 2 picosecond time domain [I], the events leading .rU the 1ocaIization of excess electrons in polar fluids have attracted considerable attention from both experimental and theoretical perspectives. The quassifree-iocalized electron relaxation has been compared to a wide class of radiationless transitions in non-isolated molecules [2]. The rapid electronic and molecular relaxations presumed ire shape the course of these processes have led several groups [3--51 to examine the time-dependence of the formation of the solvated electron (e;) in low temperature liquids or glasses, where at Ieast the molecular relakation mechanisms persist into the microsecond region. The first direct observations of the electron solvation process were reported [4] for cold alcohols (CI Jo CT,) in which an initial infrared absorption gradually shifted into the characteristic visible e, ab-