1,3-双十二烷基咪唑硅钨酸盐的制备及热性质  

Preparation and thermal properties of 1,3-didodecyl indazolium silicotungstate

作　　者：蒋云霞[1] 徐百灵 李艳 肖婷婷 马铭 JIANG Yun-xia;XU Bai-ling;LI Yan;XIAO Ting-ting;MA Ming(School of Chemistry and Pharmaceutical Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China)

机构地区：[1]吉林化工学院化学与制药工程学院

出　　处：《化学研究与应用》2019年第12期2112-2116,共5页Chemical Research and Application

基　　金：国家自然科学基金项目(21403078)资助

摘　　要：以N-三甲基硅基咪唑、1-溴十二烷为主要原料合成了一个具有双长链的咪唑离子液体——溴化1,3-双十二烷基咪唑(C12MC12)。C12MC12与多金属氧酸盐(H4SiW12O40)通过离子交换反应制备了1,3-双十二烷基咪唑硅钨酸盐(C12MC12-SiW12)。并通过1H-NMR、傅里叶变换红外(FT-IR)、热重(TGA)、差示扫描量热仪(DSC)、偏光显微镜(POM)和变温X射线衍射(XRD)对C12MC12和C12MC12-SiW12的性质进行表征。结果表明C12MC12具有液晶性质,为层状介晶结构。当用多酸阴离子SiW12O404-取代C12MC12中的Br-后,C12MC12-SiW12的熔点升高,液晶性质消失,但仍为准层状结构。An indazolium ionic liquid with double long chains,1,3-didodecyl imidazolium bromide(C12MC12),was synthesized by taking N-trimethylsilyl imidazole and 1-bromodecane as main materials.Then,1,3-didodecyl imidazole silicotungstate(C12MC12-SiW12)was prepared by straightforward ion exchange reaction of C12MC12 and polyoxometalates(H4SiW12O40).The properties of C12MC12 and C12MC12-SiW12 were characterized by 1H-NMR,infrared(FT-IR),thermogravimetry(TGA),differential scanning calorimeter(DSC),polarizing microscopy(POM)and temperature-dependent X-ray diffraction(XRD).The results showed that C12MC12 had liquid crystal properities and was layed mesomorphic structure.When SiW12O404-substituteed for Br-in C12MC12,the melting point of C12MC12-SiW12 increased and the mesogenic properties disappeared,but C12MC12-SiW12 still retained quasi-lamellar structure.

关 键 词：离子液体 多金属氧酸盐 液晶 咪唑 

分 类 号：O625[理学—有机化学]