Synthesis and study of homologous series containing ethyl spacer mesomorphic along with ntb phase compounds

According to molecular flexibility, new ethylspacer containing benzoates RO-C6H4-COO-CH2-CH2-O-C6H4-O-CH2-C6H5 were synthesized. As ethylspacer provides good flexibility, this series shows polymorphism. We are introducing an easy one-pot reaction for the esterification of an aliphatic alcohol with the help of isobutyl chloroformate, reaction time and yield as well as liquid crystalline properties of synthesized compounds were studied. As compared to the reported series,the current series is polymesomorphic in nature with a lower transition temperature. Introducing a spacer between two rigid cores enhance the mesomorphic behavior to show Ntb mesophase. The setexture and transition temperatures were carried out in temperature controlling polarizing optical microscope. All homologues were confirmed by 1H NMR, Mass spectrometry and IR spectroscopic technique.