中文摘要：

设计了先关环再衍生的方法，合成了系列外围含不同反应性官能团的新的环三藜芦烃（CTV）衍生物．利用^1H—NMR、^13C—NMR、元素分析、质谱等对合成的CTV衍生物进行了结构表征．研究表明，分子间作用力增大会导致CTV衍生物的热致液晶性减弱，结晶性增强．合成的CTVA具有热致液品性；CTV—D和CTVE由于氨基的存在产生了较强的分子间氢键作用，既形成了热致液晶态，又发生冷结晶；而CTVB和CTVC由于含有羧基、羰基、羟基或氨基等，分子间作用力强，只出现冷结晶，不能形成热致液晶．研究发现，通过外围基团的分子设计，调节氢键能力或柔性间隔基，可调节分子间作用力和熵的大小，从而控制CTV衍生物的热致液晶性．

英文摘要：

A novel series of cyclotriveratrylene derivatives （named as CTV-A, CTV-B, CTV C, CTV D and CTV-E） were synthe- sized by cyclization-derivatization method,which was different from traditional synthesis route as monomer derivatization first, then cyclization. Chemical structure of these derivatives was characterized by NMR, elemental analysis and mass spectrometry. Thermo tropic liquid crystallinity was studied by the combination of DSC and thermal polarized optical microscopy （TP（）M）. It was found that the enhancement of intermolecular interaction of CTV derivatives led to their liquid crystallinity weakened, but crystallinity enhanced. Compared with CTV-A,the melting temperature （T,n） and clear temperature （Tc） of CTV-D and CTV E both increase resulted by hydrogen bonding between amino group and carbonyl group; and the flexible spacer CH2 CH2 in CTV-E makes its Tm de- creased,leading to a widest liquid crystal temperature range. However,CTV-B and CTV C are not thermotropic liquid crystal but on-ly crystalline compounds,due to their strong intermolecular interaction caused by the introduction of carboxyl and hydroxyl groups. Therefore,the liquid crystallinity of CTV derivatives can be controlled by the tuning of intermoleeular interaction and conformation entropy through rational molecular design.