Synthesis and Photophysical Properties of Tris-bridged [3.3.n](3,6,9)Carbazolophanes

Tris-bridged [3.3.n](3,6,9)carbazolophanes In (n = 3-6), which are appropriate model compounds for fully overlapped excimer in carbazole chromophore, have been synthesized and characterized by NMR, X-ray, absorption and fluorescence spectra; In showed excimeric fluorescence, whose emission maxima strongly depended on the angles and distances between carbazole rings.