Impact of the proportionation of dialkoxy chain length on the mesophase behaviour of Schiff base/ester liquid crystals; experimental and theoretical study

H. A. Ahmedab** , M. Hagarac** & G.R. Saadba College of Sciences, Chemistry Department, Taibah University, Yanbu, Saudi Arabiab Faculty of Science, Department of Chemistry, Cairo University, Cairo, Egyptc Faculty of Science, Chemistry Department, Alexandria University, Alexandria, Egypt