College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China;
College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China;
College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China;
College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China;
College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China;
absorption spectra; carbazole trimers; electronic properties; time-dependent density functional theory (TD-DFT);