Triarylborane‐Appended Anils and Boranils: Solid‐State Emission, Mechanofluorochromism, and Phosphorescence
作者:Rajendra Prasad Nandi、Pagidi Sudhakar、Neena K. Kalluvettukuzhy、Pakkirisamy Thilagar
DOI:10.1002/chem.202001470
日期:2020.12.9
meta position (1 a) of the phenyl spacer stabilizes the enolic form (E‐OH), whereas a boryl moiety at the para position (2 a and 3 a) stabilizes the keto form (Z‐NH) in the solid state. However, in solution 1 a, 2 a, and 3 a exhibit keto–enol tautomerism in both ground and excited states. Compounds 1 a–3 a and 1–3 show red‐shifted absorption compared with 4 a and 4, which are devoid of TAB moieties
在此,设计,一系列具有共价连接的三芳基(TAB)和阿尼尔/ boranil单位的缀合物的合成,光学性质,和mechanofluorochromism特性(TAB-阿尼尔:1 - 3和TAB-boranil:1 - 3)是报告。TAB和之间的电子相互作用阿尼尔/ boranil在1 - 3和1 - 3,通过改变在苯基上垫片连接所述BMES的甲硼烷基部分的位置微调2(MES =异亚丙基丙酮)和阿尼尔/ boranil单元。苯基间隔基间位(1a)处的硼基部分稳定了烯醇式(E-OH),而在一个氧硼基团对位位置(2和3)稳定酮形式(Ž -NH)在固体状态。然而,在溶液1中,2,和3中显示出在这两个基态和激发态酮-烯醇互变异构。化合物 1 - 3和1 - 3示出红移吸收带相比,图4a和4,其缺乏TAB部分,其指示在硼中心轨道空P的有效参与的1 - 3和1 –3。化合物 1和2响应于外部刺激(例如机械研