Examination of the formation process of pre-solvated and solvated electron in n-alcohol using femtosecond pulse radiolysis

• Published in: Radiation physics and chemistry (Oxford, England : 1993) England : 1993), 2016-06, Vol.123, p.73-78
• Main Authors: Toigawa, Tomohiro, Gohdo, Masao, Norizawa, Kimihiro, Kondoh, Takafumi, Kan, Koichi, Yang, Jinfeng, Yoshida, Yoichi
• Format: Article
• Language: English
• Subjects: Correlation; Dielectric relaxation; Dynamics; Ethyl alcohol; Formations; Fs pulse radiolysis; Methyl alcohol; Pre-solvated electron; Primary process on radiation chemistry; Radiolysis; Solvated electron; Time constant
• ISSN: 0969-806X; 1879-0895
• DOI: 10.1016/j.radphyschem.2016.02.022

The formation process of pre-solvated and solvated electron in methanol (MeOH), ethanol (EtOH), n-butanol (BuOH), and n-octanol (OcOH) were investigated using a fs-pulse radiolysis technique by observing the pre-solvated electron at 1400nm. The formation time constants of the pre-solvated electrons were determined to be 1.2, 2.2, 3.1, and 6.3ps for MeOH, EtOH, BuOH, and OcOH, respectively. The formation time constants of the solvated electrons were determined to be 6.7, 13.6, 22.2, and 32.9ps for MeOH, EtOH, BuOH, and OcOH, respectively. The formation dynamics and structure of the pre-solvated and solvated electrons in n-alcohols were discussed based on relation between the obtained time constant and dielectric relaxation time constant from the view point of kinetics. The observed formation time constants of the solvated electrons seemed to be strongly correlated with the second component of the dielectric relaxation time constants, which are related to single molecule motion. On the other hand, the observed formation time constants of the pre-solvated electrons seemed to be strongly correlated with the third component of the dielectric relaxation time constants, which are related to dynamics of hydrogen bonds. •Formation time constants of the pre-solvated electrons in n-alcohols were determined.•Formation time constants of the solvated electrons in n-alcohols were determined.•Relation between pre-solvated electron formation kinetics and hydrogen bond kinetics.•Relation between solvated electron formation kinetics and hydrogen bond kinetics.