UV Photolysis of 1,4-Diaminobenzene in a Low-Temperature Argon Matrix to 2,5-Cyclohexadiene-1,4-diimine via 4-Aminoanilino Radical
作者:Nobuyuki Akai、Satoshi Kudoh、Munetaka Nakata
DOI:10.1021/jp022694z
日期:2003.8.1
UV photolysis of 1,4-diaminobenzene isolated in a low-temperature argon matrix has been investigated by Fourier transform infrared spectroscopy with the aid of the density-functional-theory calculation. Infrared bands of an intermediate produced from 1,4-diaminobenzene upon UV irradiation (λ < 350 nm) are assigned to a semiquinone-type radical, 4-aminoanilino radical. A final product produced from
借助密度泛函理论计算,通过傅里叶变换红外光谱研究了在低温氩基质中分离的 1,4-二氨基苯的紫外光解。由 1,4-二氨基苯在紫外线照射 (λ < 350 nm) 下产生的中间体的红外波段被指定为半醌型自由基 4-氨基苯胺自由基。在较短波长照射 (λ < 310 nm) 下由 4-氨基苯胺自由基产生的最终产物指定为 2,5-cyclohexadiene-1,4-diimine。1,4-二氨基苯、4-氨基苯胺自由基和2,5-环己二烯-1,4-二亚胺的优化结构相互比较,导致π-共轭体系的变化类似于对苯二酚和1, 4-苯醌体系。此外,2,5-cyclohexadiene-1 的反式-顺式异构化,