Interest in the naphthalene unit is increasing considerably. Recently, low and high molecular mass mesogens of naphthalene derivatives exhibiting attractive properties have been reported in the literature. In the present study, three mesogenic homologous series containing a naphthalene moiety have been synthesized. All the homologous series were characterized by elemental analysis and spectroscopic techniques. The behaviour of all three series and their mesophase thermal stabilities are compared with each other and with other structurally related series.