Bis[1]benzothieno[1,4]thiazines: Planarity, Enhanced Redox Activity and Luminescence by Thieno‐Expansion of Phenothiazine
作者:Arno P. W. Schneeweis、Simone T. Hauer、Guido J. Reiss、Thomas J. J. Müller
DOI:10.1002/chem.201805085
日期:2019.3.7
three regioisomers of bis[1]benzothieno[1,4]thiazines; X‐ray structure analyses and DFT calculations were corroborated for correlation of their electronic properties. All regioisomers outscore the parent compound phenothiazine with respect to a low‐lying oxidation potential and reversible redox activity. The anti‐anti bis[1]benzothieno[3,2‐b:2′,3′‐e][1,4]thiazines possess the lowest oxidation potentials
双重布赫瓦尔德-哈特维格胺选择性地提供了双[1]苯并噻吩并[1,4]噻嗪的三种区域异构体;证实了X射线结构分析和DFT计算具有电子特性的相关性。就低位氧化电位和可逆氧化还原活性而言,所有区域异构体均优于母体化合物吩噻嗪。该抗-抗双[1]苯并噻吩并[3,2- b:2',3'- ë ] [1,4]噻嗪具有在本系列的最低氧化电位和在溶液中显示的显着的绿色发光(Φ ˚F ≈20 %)并处于固态。SYN -抗区域异构体仅在溶液中微弱发光,但表现出聚集诱导的发射增强和固态发光。最有趣的是,X射线结构分析显示,抗-反衍生物具有五环带电荷的1,4-噻嗪系统的惊人的共面结构,强调了与杂并苯的结构相似性。计算得出的理论上与核无关的化学位移还表明,这些8π电子核系统可以被认为是第一个具有抗芳香族特性的电子无偏的带电荷的1,4-噻嗪。