A novel series of bent-core molecules with a central bent core based on 2,5-bis(4-hydroxyphenyl)-1,3,4-oxadiazole, oxymethylene-bridged (CH2O), and alkyl tails with carbon numbers m=3, 5, 6, 7, 8, 9, 10 were prepared. Structures of the titled compounds were confirmed by 1H NMR, 13C NMR, IR, MS techniques, their transition temperatures and phase transition were investigated using differential scanning calorimetric (DSC) and polarizing optical microscopy (POM). Comparing with ester-bridged, target compounds 6a~6g have right chemical structure, po...