LaVerne Jay A, Carmichael I, Araos M S
Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA.
J Phys Chem A. 2005 Jan 27;109(3):461-5. doi: 10.1021/jp045786s.
A combined experimental and theoretical approach has been used to probe the radiolytic decomposition of liquid pyridine. The major single condensed phase product in the gamma-radiolysis of pyridine is dipyridyl with a yield of 1.25 molecules/100 eV total energy absorbed. Scavenging studies suggest that most, if not all, dipyridyl has a radical precursor, but only about 10% of that is due to the pyridyl radical. The remainder of the dipyridyl may be due to reaction of the parent radical cation with pyridine. Iodine scavenging and quantum chemical calculations both show that the ortho-pyridyl radical (2-pyridyl) is far more stable than the other two isomers.
采用实验与理论相结合的方法来探究液态吡啶的辐射分解。吡啶γ辐射分解中的主要单一凝聚相产物是联吡啶，其产率为1.25个分子/100 eV总吸收能量。清除研究表明，即使不是全部，大部分联吡啶都有自由基前体，但其中只有约10% 是由吡啶基自由基产生的。联吡啶的其余部分可能是由于母体自由基阳离子与吡啶的反应。碘清除和量子化学计算均表明，邻吡啶基自由基（2-吡啶基）比其他两种异构体稳定得多。
