Several starlike low-aspect-ratio block molecues were synthesized in this article.They are tetrahedral pentraerytritol esters(5 and 9) which are synthesized via esterification of pentraerytritol with corresponding carbonic acid;and tetraphenylmethane derivatives 16,17,which are synthesized from the corresponding tetraiodide by suzuki coupling reaction as key step.Based on the investigation of polarizing optical microscopy and differential scanning calorimetry,the mesophase behavior of these compounds are analysed,they show no liquid crystalline behaviors and the reason was given.
