Synthesis and characterization of triazine linked carbazole derivatives green-light-emitting molecules

Abstract

Novel 2,4,6-triphenyl-1,3,5-triazine linked carbazole through olefin double bond star shape molecules with different linear and branched chain were synthesized and systematically investigated by aggregation induced emission (AIE) studies and electrochemical properties. These molecules are shows broad absorbance range with good intramolecular charge transfer character (ICT). These derivatives are exhibit positive solvatochromism effect and higher Stokes shift values in the range of 6819–1119 cm−1. These derivatives are displayed aggregation-induced emission (AIE) property in THF-water mixture (TRZ-hexyl at 10/90%, TRZ-octyl at 30/70%, TRZ-branched at 50/50%). The electrochemical studies show that band gap of TRZ-hexyl, TRZ-octyl, and TRZ-branched at 1.87, 1.73 eV, and 1.86 eV respectively. All these derivatives are exhibit deep-lying highest occupied molecular orbital (HOMO) energy levels at ∼ −5.04 eV and LUMO energy levels at ∼ −3.20 eV. The proper AIE, HOMO, and LUMO energy level pave the way for their potential use in OLEDs and solar cell applications.