A series of 2-(4-alkoxyphenyl)-5-(4-methyl)pyridines (CH_3C_5H_3 NC_6H_4O-C_nH_<2n+1>) (2R-Pn, n= 1〜9) were synthesized and their mesogenicity was studied. In the 2R-Pn homologues, no mesomorphic phase appeared in n= 1〜5 and only a monotropic nematic phase was observed in n= 6〜9. The mesomophic potential is relatively weaker for the 2R-Pn than that in 3R-Pn and 4R-Pn. This caused due to the lack of phenyl ring between the pyridine ring and the methyl group.
