Indirect Electrophilic Substitutions of p-Deficient Heteroaromatics to Prepare Novel Compounds for High-Tech Applications 

Alan R. Katritzky, Peter Czerney, Sergey N. Denisenko, and Volker Jesser 

Figure 5. UV/Vis absorption and fluorescence spectra of compounds 8a/9a at various pH  

 
pKa = 2.85