Picosecond pulse radiolysis of the liquid diethyl carbonate.
The diethyl carbonate, DEC, is an ester that is used as a solvent in Li-ion batteries, but its behavior under ionizing radiation was unknown. The transient optical absorption spectra, the decay kinetics, and the influence of various scavengers have been studied by using the picosecond laser-triggered electron accelerator ELYSE. In neat DEC, the intense near-IR (NIR) absorption spectrum is assigned to the solvated electron. It is overlapped in the visible range by another transient but longer-lived and less intense band that is assigned to the oxidized radical DEC(-H). The solvated electron molar absorption coefficients and radiolytic yield evolution from 25 ps, the geminate recombination kinetics, and the rate constants of electron transfer reactions to scavengers are determined. The radiolytic mechanism, indicating a certain radioresistance of DEC, is compared with that for other solvents.
Laboratoire de Chimie Physique, ELYSE, UMR 8000 CNRS-UPS, Université Paris-Sud , Bât. 349, 91405 Orsay, France.
Fayçal
F
Torche
Abdel Karim
AK
El Omar
Philippe
P
Babilotte
Sébastien
S
Sorgues
Uli
U
Schmidhammer
Jean-Louis
JL
Marignier
Mehran
M
Mostafavi
Jacqueline
J
Belloni
D004047:Diethyl Pyrocarbonate / Q000031:analogs & derivatives* / Q000737:chemistry; D007700:Kinetics; D011675:Pulse Radiolysis / Q000379:methods*; D019265:Spectroscopy, Near-Infrared
C017858:ethyl carbonate; D004047:Diethyl Pyrocarbonate