作者:Cheng-Hua Deng、Chuan-Jin Guan、Man-Hua Shen、Cheng-Xue Zhao
DOI:10.1016/s0022-1139(02)00074-x
日期:2002.8
perfluoroalkyl nitroxides ButN(O) Rf (Rf=CF3, 5; C2F5, 6; n-C3F7, 7) and s-butyl perfluoroacyl nitroxides BusN(O) CORf (Rf=CF3, 9; n-C3F7, 10) have been employed as ESR probes of solvation in different common organic solvents. In aprotic solvents, the measured aN values for each of the nitroxyl probes show a linear correlation with the cybotactic polar solvent parameters ET (Dimroth) and Z (Kosowar), i
一些新合成的氟化氮氧自由基,如吨丁基氮氧自由基的全氟烷卜吨N(O)R ˚F(R ˚F = CF 3,5 ; c ^ 2 ˚F 5,6 ; Ñ -C 3 ˚F 7,7)和小号丁基全氟硝基氧卜小号N(O)COR ˚F(R ˚F = CF 3,9 ; ñ -C 3 ˚F 7,10)已被用作在各种常见有机溶剂中溶剂化的ESR探针。在非质子溶剂中,测得的一个Ñ值为每个硝酰探针的示与群聚极性溶剂参数的线性相关ë Ť(迪姆罗特)和Ž(Kosowar),即一个Ñ = BE Ť + Ç,和一个Ñ = b ' Z + c '。为斜率的物理意义(b或b '),斜率× ë Ť或斜率× Ž,外推的截距上一个Ñ轴ç或Ç ',被链接时,分别到一个特定的氮氧化物向着溶剂化的敏感性,对整体的溶剂化作用的大小一Ñ值,和本征一个Ñ各氮氧化物在理想气态值状态。在截距一个Ñ轴也可以用作电负性为全氟烷基的新度量,CF 3,C 2 ˚F