Fluorescence Self and External Quenching by Aniline of Ethyl 5-(4-aminophenyl)-3-amino-2,4-dicyanobenzoate

摘要

Spectral changes of ethyl 5-(4-aminophenyl)-3-amino-2,4-dicyanobenzoate (EAADCy), observed as a function of solute concentration, external quenching by aniline (one of the fragments of the investigated molecule), and temperature, were interpreted in terms of the selective quenching of different EAADCy conformers. It was shown that molecules with the donor and acceptor moieties oriented orthogonally are considerable more self and external quenched than the coplanar conformers. On the other hand, results of performed studies indicate that in the studied system static (mainly) and dynamic processes of quenching take place.