作者:Hanan Afifi、Alexandre Mikhailine、Gabriela Mladenova、Andrei Chtchemelinine、Israt Sultana、Tatiana Dyblenko、Evgeny Danilov、Rene Fournier、Edward Lee-Ruff
DOI:10.3998/ark.5550190.0013.631
日期:——
The 9-fluorenyl cation is a member of the 4N Huckel antiaromatic series of intermediates, first observed by time-resolved spectroscopy on UV photo-excitation of 9-fluorenol. [1] 9Trifluoromethyl-9-fluorenol incorporating an electron-withdrawing substituent was subjected to preparative and laser flash photolysis. Photoproduct studies in methanol indicated products derived from the corresponding fluorenyl
9-芴基阳离子是 4N Huckel 反芳烃系列中间体的成员,首次通过时间分辨光谱对 9-芴醇的紫外光激发进行观察。[1] 将含有吸电子取代基的 9Trifluoromethyl-9-芴醇进行制备和激光闪光光解。甲醇中的光产物研究表明,衍生自相应芴基阳离子和自由基中间体的产物。六氟异丙醇 (HFIP) 中的时间分辨光谱显示了一个瞬态,该瞬态被指定为相应的阳离子,如甲醇淬灭所证明的那样。将该瞬态的寿命和甲醇猝灭率与 9-甲基芴基阳离子的寿命和甲醇猝灭率进行了比较。这些离子的动力学稳定性与从理论计算获得的热力学参数进行了比较。