Most dimer compounds connected with soft linkers. In the first part of this thesis,two discotic mesogen connected with benzene as rigid linker to form discotic dimer. Benzen can provide different bridging angles, which influence discotic dimmers forrming different arrangement in the space. Because of steric effect, bridging discotic mesogen in ortho、meta、para position in bezene formed discotic nematic phase. The aim of the second part of this thesis is to synthesize triangular cyclynes with mesophase behavior. Cyclynes is hard to synthesize and difficult to form liquid crystal phase. To synthesize triangular cyclynes with iodo and ethynyl unit compound can reduce reaction step and enhance reaction yield.