Radical Ions of 3-Styryl-quinoxalin-2-one Derivatives Studied by Pulse Radiolysis in Organic Solvents
作者:Konrad Skotnicki、Julio R. De la Fuente、Álvaro Cañete、Eduardo Berrios、Krzysztof Bobrowski
DOI:10.1021/acs.jpcb.8b01004
日期:2018.4.12
in the para position in their benzene ring, and remaining two with double methoxy substituents (−OCH3), however, at different positions (meta/para and ortho/meta) have been studied by UV–vis spectrophotometric pulse radiolysis in neat acetonitrile saturated with argon (Ar) and oxygen (O2) and in 2-propanol saturated with Ar, at room temperature. In acetonitrile solutions, the radical anions (4R-SQ•–)
七个3-styryl-quinoxalin-2(1 H)-一个(3-SQ)衍生物,一个在苯乙烯基部分没有取代基,另外四个带有供电子基团的自由基离子和中性氢化自由基的吸收光谱和动力学行为(R = -CH 3,-OCH 3和-N(CH 3)2)或在其苯环对位的吸电子(R = -OCF 3)取代基,其余两个带有双甲氧基取代基(- OCH 3),但是,已通过紫外可见分光光度法在纯乙腈中充满了氩气(Ar)和氧气(O 2)的紫外可见分光光度法研究了在不同位置(间位/对位和邻位/间位))和在室温下充满Ar的2-丙醇中。在乙腈溶液中,自由基阴离子(4R-SQ •–)的特征在于两个最大吸收值分别位于λmax = 470–490 nm和λmax = 510–540 nm,各自的摩尔吸收系数ε470–490 = 8500 –13 100 M –1 cm –1和ε510–540 = 6100–10 300 M –1