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Series of non-symmetric liquid crystal dimers, a-(4-benzylidenechloroaniline-4 0 -oxy)-x-[4-(thiophene-2-carboxyl)benzylideneaniline-4 0 -oxy]alkanes incorporating a thiophene-based moiety in one of the two mesogenic units have been synthesized and characterized. The nematogenic properties of the dimers were studied wherein the flexible spacers made up by n methylene units (-CH 2 -) ranging from n=5 to n=12. These dimers exhibit enantiotropic N phase with high thermal stability (>187.0 C). The N phase temperature range for the present homologues is found to be strongly dependent on the length and parity of the methylene spacer which connects the 4-benzylidenechloroaniline and 4-(thiophene-2-carboxyl)-benzylideneaniline mesogenic cores.

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