Time-Dependent Radiolytic Yields of the Solvated Electrons in 1,2-Ethanediol, 1,2-Propanediol, and 1,3-Propanediol from Picosecond to Microsecond

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• 作者：Mingzhang Lin ; Mehran Mostafavi ; Yusa Muroya ; Zhenhui Han ; Isabelle Lampre ; Yosuke Katsumura
• 刊名：Journal of Physical Chemistry A
• 出版年：2006
• 出版时间：October 12, 2006
• 年：2006
• 卷：110
• 期：40
• 页码：11404 - 11410
• 全文大小：208K
• 年卷期：v.110,no.40(October 12, 2006)
• ISSN：1520-5215

文摘

The absorption spectra of the solvated electron in 1,2-ethanediol (12ED), 1,2-propanediol (12PD), and 1,3-propanediol (13PD) have been determined by nanosecond pulse radiolysis techniques. The maximum of theabsorption band located at 570, 565, and 575 nm for these three solvents, respectively. With 4,4'-bipyridine(44Bpy) as a scavenger, the molar extinction coefficients at the absorption maximum of the solvated electronspectrum have been evaluated to be 900, 970, and 1000 mol^-1 m² for 12ED, 12PD, and 13PD, respectively.These values are two-thirds or three-fourths of the value usually reported in the literature. With these extinctioncoefficients, picosecond pulse radiolysis studies have allowed us to depict the radiolytic yield of the solvatedelectron in these solvents as a function of time from picosecond to microsecond. The radiolytic yield in theseviscous solvents is found to be strongly different from that of water solution.