UV-visible spectroscopic study of laser irradiated lithium colloids and ionic liquids

Abstract

The UV-visible spectroscopy of laser irradiated lithium colloids and ionic liquids has been investigated. TEM00 mode 1064 nm DPSS laser (LSR1064NL) of intensity 148 W/cm < sup > 2 < /sup > and 950 mW power was passed through Li containing Acetonitrile, Methanol, Hexane, 1,4-Dioxane and Chloroform for 30 min. The Li metal and laser irradiation markedly affected the lower wavelength cut-off i.e., pattern of absorption spectrum of solvents and colloids. The sharp band at 190 nm and two new broad bands at 256 nm and 292 nm are presumably due to the formation of monolithium derivatives of Acetonitrile (i.e., Li-CH < inf > 2 < /inf > CN, Li-CHCNH, Li-CCNH < inf > 2 < /inf > , CHCN-Li-H and CH < inf > 2 - < /inf > N-Li) on irradiation. However comprehensive research on same is required to be performed. The present study is certainly helpful in understanding the long-term performance and the mechanism by which the properties of colloids change.