Synthesis and mesomorphism of novel chalconyl esters with a lateral nitro group

摘要

A new chalconyl homologous novel series with lateral nitro group: 4-(3-4-(heptyloxy)phenyl)acryloyl-2'-nitro phenyl 4'-alk oxy benzoate have been synthesized and all the members are differed by the terminal chain length CnH2n+1, where n = 1,2,3,4,5,6,7,8,10,12,14,16,18. Their transition temperatures and mesophase characteristics are studied with the help of polarizing optical microscope (POM). All 13 homolog of series except the C-1-C-4 are enantiotropically mesogenic. The molecular structures have been confirmed by the analytical techniques of NMR, IR, and elemental analysis.