Abstract
The research on aggregation-induced emission (AIE) has been a hot topic in the fields of photo-physics and luminescent materials. Design and synthesis of new AIE-active luminogens (AIEgens) will further promote the development of this area. Based on our developed new AIEgen of tetraphenylpyrazine (TPP), in this paper, we further enriched its family by covalently attaching thiophene unit on TPP core, and prepared three AIEgens of TPP-T, TPP-2T and T-TPP-T. Their structure-property relationship was studied in detail. The results showed that TPP-T, TPP-2T and T-TPP-T feature the aggregation-enhanced emission (AEE) characteristics. Their powders emit at 418, 437 and 436 nm with absolute fluorescence quantum yields of 26.8, 29.0 and 30.9%, respectively, which makes them promising to be used as emitting layer in fabrication of organic light-emitting diodes in combination with their excellent thermal stability.
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