1. It is an obvious feature that the detur groups always take place tautomerism in this process, such as in the excited state enol form transfers to keto form, and result in red-shift of the emission wavelength of molecules.
在此过程中给质子基团往往会发生互变异构现象，如烯醇在激发态时发生烯醇式向酮式转变的互变异构现象，导致分子发射波长向长波长显著移动，这是ESIPT的一个重要特征。