in anils of aromatic α-hydroxyaldehydes (salicylaldehyde, 2-hydroxynaphthalene-1-carbaldehyde and the novel 10-hydroxyphenanthrene-9-carbaldehyde) have been studied by a combination of spectroscopic techniques. Solution 1H and 13C NMR is used to establish the position of the tautomeric equilibria. UV-visible absorption and fluorescence spectral data help to characterize the existence, in all cases
结合光谱技术研究了芳香族α-羟基醛(
水杨醛,2-羟基
萘-1-
甲醛和新型
10-羟基菲-9-甲醛)在基态和激发态中的质子转移过程。使用溶液1 H和13 C NMR确定互变异构平衡的位置。在所有情况下,紫外可见吸收和荧光光谱数据有助于表征激发态分子内质子转移(ESI
PT)现象。半经验计算包括完整的几何优化和基态的地层热(
AM1)以及垂直激发能和振子强度(INDO / S)的计算与实验观察一致。