Synthesis and Photophysical Properties of Push–Pull Structures Incorporating Diazines as Attracting Part with a Fluorene Core

Abstract

Abstract We report, herein, the synthesis of new push–pull chromophores that incorporate a diazine ring as the electron‐withdrawing part and an N , N ‐dimethylaniline moiety as the electron‐donating part. Both of which are connected to a fluorene core. The length of the conjugated backbone was increased by incorporating ethynyl linkers and triazole rings on the both sides of the fluorene. The optical and two‐photon absorption (TPA) properties were investigated, which exhibitied high quantum yields (up to 70 %), significant Stokes shifts, and good TPA cross‐sections.