Short axially asymmetrically 1,3-disubstituted pyrene-based color-tunable emitters: Synthesis, characterization and optical properties

In contrast to conventional pyrene-based emitters which feature D-?-A type structures, a new class of possessing short axis are gaining interest owing both their academic importance and promising applications in organic optoelectronic materials. Herein, donor acceptor substituents were introduced at 1-, 3-positions by employing two step bromination reaction. Two 1-donor-3-acceptor pyrenes systematically investigated 1H/13C NMR spectroscopy, optical theoretical calculations. The preliminary research the substituent positions substitutions pattern on properties materials as well frontier orbitals is reported. experimental results indicated strong impact photophysical endowed with possibility precise color-control pyrene derivatives through variation.