Synthesis and Two-Photon Absorption Properties of Two Long Conjugated Asymmetric Carbazole Derivatives
摘要:
Two long pi conjugated asymmetric carbazole derivatives, 3-benzothiazolyl-6-(4-(4-methoxystyryl)-styryl)-9-butylcarbazole (M1) and 3-(4-(4-methoxystyryl)styryl)-9-butylcarbazole (M2), were synthesized and characterized by FT-IR, H-1 NMR and elemental analyses. Their linear photophysical and two-photon absorption (TPA) properties were investigated by UV-vis absorption, fluorescence emission spectra and the two-photon excited fluorescence (TPEF) measurements in DMF, respectively. The results show that both compounds have strong fluorescence emission and the fluorescence quantum yield (Phi) of M2 (0.36) is higher than M1 (0.25), M1 exhibits larger TPA cross-section (1538 GM) than M2 (564 GM) in the femtosecond regime, indicating their potential applications as excellent optoelectronic material in optical field.