The interplay of conformation and photophysical properties in deep-blue fluorescent oligomers

摘要

We report the synthesis, X-ray crystal structures and photo-physics of new donor-acceptor oligomers of fluorene (F) and dibenzothiophene-S,S-dioxide (S) with constrained dihedral angles in the backbone. The materials display bright deep-blue fluorescence and evidence is presented for a planarised intramolecular charge-transfer (PICT) state in the F-S systems.