Synthesis, aggregation-induced emission, and electroluminescence of a new compound based on tetraphenylethene, carbazole, and dimesitylboron moieties

Abstract

A novel molecule, 3,6-bis(dimesitylboryl)-9-(4-(1,2,2-triphenylvinyl)phenyl)-9H-carbazole (DTPC), was synthesized by introducing two dimesitylboron groups and one tetraphenylethene group to the 3-position, 6-position, and 9-position of carbazole, respectively. The structure of DTPC was fully characterized by proton nuclear magnetic resonance spectroscopy, mass spectrometry, and elemental analysis. The thermal, electrochemical, and photophysical properties of DTPC were studied by thermogravimetry in conjunction with electrochemistry, UV–vis absorption spectroscopy and fluorescence spectroscopy. The results reveal that DTPC has excellent aggregation-induced emission properties. The multilayer electroluminescent device fabricated by using DTPC as light-emitting layer emits the blue light (λmax 489 nm) with CIE coordinates (0.17, 0.29) and shows good electroluminescent performances with the turn-on voltage of 5.7 V, maximum luminance of 5709 cd/m2 (at 15 V) and maximum luminance efficiency of 4.31 cd/A (at 8.2 V).