The Synthesis and Liquid Crystal Properties of Certain 5,5″-Disubstituted 2,2′:5′,2″-Terthienyls
                                
                                    
                                        作者:D. J. Byron、A. S. Matharu、R. C. Wilson、G. Wright                                    
                                    
                                        DOI:10.1080/10587259508037316
                                    
                                    
                                        日期:1995.5
                                    
                                    A preliminary account of the synthesis and liquid crystal properties of representative members of an homologous series of 5-alkanoyl-5 ''-alkyl-2,2':5',2 ''-tertbienyls and the analogous 5,5 ''-di-alkyl-2,2':5',2 ''-terthienyls is given. The disposition of the three thiophene rings renders the molecular geometry sufficiently anisotropic that suitably substituted compounds are mesomorphic, and the liquid crystal transition temperatures of corresponding members of the two series are compared. The related 5, 5'-disubstituted 2, 2'-bithienyl derivatives are not mesomorphic.