Time-dependent radiolytic yields at room temperature and temperature-dependent absorption spectra of the solvated electrons in polyols  

作　　者：Mingzhang LIN Mehran MOSTAFAVI Yusa MUROYA Isabelle LAMPRE Yosuke KATSUMURA 

机构地区：[1]Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, Japan [2]Laboratoire de Chimie Physique/ELYSE, UMR 8000 CNRS / Université Paris-Sud, Centre d＇Orsay, Bat. 349, 91405 Orsay Cedex, France

出　　处：《Nuclear Science and Techniques》2007年第1期2-9,共8页核技术（英文）

摘　　要：The molar extinction coefficients at the absorption maximum of the solvated electron spectrum have been evaluated to be 900,970,and 1000 mol^(-1).m^2 for 1,2-ethanediol (12ED),1,2-propanediol (12PD),and 1,3-propanediol (13PD),respectively.These values are two-third or three-fourth of the value usually reported in the published report. Picosecond pulse radiolysis studies have aided in depicting the radiolytic yield of the solvated electron in these sol- vents as a function of time from picosecond to microsecond.The radiolytic yield in these viscous solvents is found to be strongly different from that of the water solution.The temperature dependent absorption spectra of the solvated electron in 12ED,12PD,and 13PD have been also investigated.In all the three solvents,the optical spectra shift to the red with increasing temperature.While the shape of the spectra does not change in 13PD,a widening on the blue side of the absorption band is observed in 12ED and 12PD at elevated temperatures.The molar extinction coefficients at the absorption maximum of the solvated electron spectrum have been evaluated to be 900, 970, and 1000 mol^-1·m^2 for 1,2-ethanediol （12ED）, 1,2-propanediol （12PD）, and 1,3-propanediol （13PD）, respectively. These values are two-third or three-fourth of the value usually reported in the published report. Picosecond pulse radiolysis studies have aided in depicting the radiolytic yield of the solvated electron in these solvents as a function of time from picosecond to microsecond. The radiolytic yield in these viscous solvents is found to be strongly different from that of the water solution. The temperature dependent absorption spectra of the solvated electron in 12ED, 12PD, and 13PD have been also investigated. In all the three solvents, the optical spectra shift to the red with increasing temperature. While the shape of the spectra does not change in 13PD, a widening on the blue side of the absorption band is observed in 12ED and 12PD at elevated temperatures.

关 键 词：多羟基化合物 溶剂化电子 时间相关性辐射分解 室温 温度相关性吸收谱 

分 类 号：O644.2[理学—物理化学] O621.25[理学—化学]