Photoreaction mechanisms of 2-bromophenols studied by low-temperature matrix-isolation infrared spectroscopy and density-functional-theory calculation
作者:Nobuyuki Akai、Satoshi Kudoh、Masao Takayanagi、Munetaka Nakata
DOI:10.1016/s0009-2614(02)01294-0
日期:2002.9
Photoreaction mechanisms of 2-bromo, 2-bromo-4-chloro and 2,4-dibromophenols in low-temperature argon matrices have been investigated by Fourier transform infrared spectroscopy. Density-functional-theory calculations are performed to assign the observed infrared bands of photoproducts, where a 6-311+G(d,p) basis set is used to optimize geometrical structures. It is concluded that 4-bromo-2,5-cyclohexadienone
通过傅里叶变换红外光谱研究了2-溴,2-溴-4-氯和2,4-二溴苯酚在低温氩气基质中的光反应机理。执行密度泛函理论计算,以分配观察到的光产品的红外波段,其中使用6-311 + G(d,p)基集来优化几何结构。结论是,与2-氯酚相比,4-溴-2,5-环己二酮主要由2-溴酚产生,而环戊二烯基亚甲基甲酮anHBr配合物的形成是次要途径。从红外波段的吸光度变化估计两个反应路径之间的分支比为5.4±0.3。