Synthesis and optical physical properties of tetramer composed of carbazole by connecting with ethynyl groups

Abstract

To develop a new two-photon luminescence material a large cyclic tetramer composed of carbazole was synthesized by connecting with ethynyl groups. Because the pi conjugate system expanded by the acetylene bridge and the pi electron would be delocalized, appearance of a new optical function is expected. Moreover, large cyclic pi conjugate systems were constructed with the formation of the cyclic tetramer that closed the connected body of the carbazole, and the red shifts of the fluorescent wave length by expanding the pi conjugation system were suggested.