Synthesis and Mesomorphic Properties of 2-（4-Alkoxybenzoyloxy or 4-Alkoxycinnamoyloxy）-5-oxo-2,5-dihydrofurans  

作　　者：郭辉 韩杰 王海英 孟继本 

机构地区：[1]Department of Chemistry, Nankai University, Tianjin 300071, China

出　　处：《Chinese Journal of Chemistry》2005年第12期1683-1687,共5页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Nos. 20402009 and 20490210）.

摘　　要：Two series of p-alkoxybenzoates Ia-If and p-alkoxycinnamates IIa-IIf, each species beating one terminal furanone, have been synthesized and characterized by IR, ^13C NMR, ^1H NMR, MS spectra and elemental analysis. The mesogenic properties of both series of furanones have been studied by polarizing optical microscopy and differential scanning calorimetry （DSC）. The relationship between structures and mesogenic properties was discussed. The results show that the increased alkoxy chain length （C7-C12） and the bridging groups between the benzene ring and the furanone ring affected the mesomorphic properties greatly, and the two series of furanones might display monotropic or enantiotropic nematic （N） or semetic C （SmC） mesophases and different mesomorpic phase temperature ranges corresponding to different carbon chain length.Two series of p-alkoxybenzoates Ia-If and p-alkoxycinnamates IIa-IIf, each species beating one terminal furanone, have been synthesized and characterized by IR, ^13C NMR, ^1H NMR, MS spectra and elemental analysis. The mesogenic properties of both series of furanones have been studied by polarizing optical microscopy and differential scanning calorimetry （DSC）. The relationship between structures and mesogenic properties was discussed. The results show that the increased alkoxy chain length （C7-C12） and the bridging groups between the benzene ring and the furanone ring affected the mesomorphic properties greatly, and the two series of furanones might display monotropic or enantiotropic nematic （N） or semetic C （SmC） mesophases and different mesomorpic phase temperature ranges corresponding to different carbon chain length.

关 键 词：FURANONE BENZOATE CINNAMATE liquid crystal SYNTHESIS 

分 类 号：O625.511[理学—有机化学]