我们研究了1-(n-菲基)-2-(m-菲基)乙烯的光产物(n E m;n,m = 1、3和9),以了解基于NMR光谱的光环化模式。通过X射线晶体学分析光产物的晶体结构,并基于发射和瞬态吸收测量来研究光环化分子的光物理特征。制备了在1-位和3-位取代的菲衍生物,用于通过二苯乙烯衍生物的光环化合成n E m。我们获得了四种主要的光产品(n @ m)从相应的n E m。通过X射线晶体学测定,发现其中两个在单晶中具有外消旋分子结构。除了主要的光产物外,还分离出两种类型的次要光产物(n @ m PP)。在溶液中测定了获得的光产物的荧光量子产率和寿命,而在粉末中获得了确定的荧光量子产率。通过激光光解技术观察溶液中的三重态-三重态吸收光谱表明,跨系统进入三重态的过程与荧光过程竞争。
The continuous flow reaction technique has been applied to the photocyclization of 1,2-diarylethenes, the so-called Mallory reaction, to afford phenacenes in high chemical yields and efficiencies (114–288 mg h−1). The present technique will allow us to produce several grams of phenacenes at a time.
Phenacenes: A family of graphite ribbons. 1. Syntheses of some [7]phenacenes by stilbene-like photocyclizations
作者:Frank B Mallory、Kelly E Butler、Amanda C Evans、Clelia W Mallory
DOI:10.1016/0040-4039(96)01618-8
日期:1996.9
reported phenacene, the name we propose for the family of polycyclic aromatic compounds having fused benzene rings in an extended phenanthrene-like structural motif, contains only six rings ([6]phenacene). We have employed stilbene-likephotocyclizations to synthesize the unsubstituted [7]phenacene, an extremely insoluble compound, as well as 2,13-di-n-pentyl[7]phenacene and 2,13-di-tert-butyl[7]phenacene