presented of an elongated polycondenseddye with a donor–acceptor substitution. The charge‐transfer (CT) state, polarized along the long molecular axis, is close in energy to a local excitation (LE) of the polycondensed system, roughly polarized along the short molecular axis, which makes this system particularly suitable to investigate the subtle LE/CT interplay. An essential‐state model is presented that
广泛的光谱分析显示了带有供体-受体取代的细长缩聚染料。沿长分子轴极化的电荷转移(CT)状态在能量上与缩聚系统的局部激发(LE)接近,而沿短分子轴大致极化,这使得该系统特别适合研究细微的分子。 LE / CT相互作用。提出了一个基本状态模型,该模型定量地重现了在不同极性和粘度的溶剂中收集的吸收光谱和荧光光谱以及荧光发射和激发各向异性光谱,这为理解溶剂极性和溶剂弛豫如何影响溶剂光谱奠定了坚实的基础。低层激发的性质。
Metal-free transfer hydrogenation/cycloaddition cascade of activated quinolines and isoquinolines with tosyl azides
作者:Suman Yadav、Ruchir Kant、Malleswara Rao Kuram
DOI:10.1039/d3cc01430d
日期:——
difficulty in isolating cyclic enamines emanating from their intrinsic instability has impeded their exploration in cycloaddition reactions. Here, we achieved a metal-free domino reaction providing quinoline and isoquinoline-derived cyclic amidines by the cycloaddition of azides with in situ generated enamines via dearomatization.