Ground- and excited-state prototropic tautomerism in anils of aromatic α-hydroxy aldehydes studied by electronic absorption, fluorescence and<sup>1</sup>H and<sup>13</sup>C NMR spectroscopies and semi-empirical calculations
作者:Sergio H. Alarcón、Alejandro C. Olivieri、Raquel M. Cravero、Guillermo Labadie、Manuel González-Sierra
DOI:10.1002/poc.610081104
日期:1995.11
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(ESIPT)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。