“…Within the large class of calamitic liquid crystalline compounds, typically formed by a conformationally rigid and linear mesogenic core to which flexible alkyl tails are attached, bent mesogenic cores are comparatively few. Examples are given by several mesogens containing five-membered aromatic heterocyclic rings, such as oxadiazoles, isoxazoles, pyrazoles, triazoles, benzoxazoles and carbazoles (Girdziunaite et al, 1991;Caruso et al, 1992;Centore et al, 1996;Benbayer et al, 2013;Lu et al, 2014;Li et al, 2015b;Tomi et al, 2016;Saha et al, 2017;Hu et al, 2017Hu et al, , 2018.…”