ions (Ln-LCOs) exhibiting excellent liquid crystalline properties and unique fluorescence properties were prepared using poly(methylhydrogeno)siloxane, cholesteric LC M1, carboxyl-containing LC M2 and anhydrous lanthanide chlorides. The chemical structures and liquid-crystalline behaviors of Ln-LCOs were characterized by various experimental techniques. The introduction of low content of lanthanide
使用聚(甲基氢)硅氧烷,胆甾醇型LC M 1,含羧基的LC M 2制备了具有优异的液晶性能和独特的荧光性能的具有镧系离子(Ln-LCO)的新型光致发光手性液晶低聚物和无水镧系氯化物。通过各种实验技术表征了Ln-LCO的化学结构和液晶行为。低含量镧系元素离子的引入使低聚物具有显着的发光特性。所有的低聚物都是手性的。镧系元素离子没有改变低聚物的液晶结构,这通过X射线衍射证实。傅立叶变换红外成像研究表明,镧系元素离子均匀分布在低聚物中,避免了镧系元素离子聚集引起的荧光猝灭。建立了以镧系离子为中心离子,手性液晶低聚物为配体的二元络合物模型,以表达各组分的相互作用和分布。Ln-LCO表现出可逆的中晶相变,宽的中相温度范围和高的热稳定性。热重分析结果表明,所有Ln-LCO的分解温度(5%失重)均大于300℃。当激发时,Ln-LCO可以发出红光或绿光。Ln-LCO的发光强度随着镧系元素离子从1到4 mo
chiral fluorinated liquidcrystalline polymers containing rareearthcomplexes (RE-LCPs) possessing wonderful liquidcrystalline properties and distinct fluorescence properties were graft copolymerized using poly(methylhydrogeno)siloxane (PMHS), a chiral fluorinated liquidcrystalline monomer (M1), and a fluorinated rareearthcomplex (RE-M2). The chemical structures and liquidcrystalline behaviors of RE-LCPs
Several novel chiral side-chain liquidcrystalline (LC) polysiloxane resins containing epoxy groups and mesogenic components have been graft copolymerized by a one-step hydrosilylation reaction with poly(methylhydrogeno)siloxane, an epoxy monomer 2-(allyloxymethyl)oxirane, and chiral fluorinated liquid-crystalline monomers 4′-(4-(allyloxy)benzoyloxy)biphenyl-4-yl 6-(perfluorooctanoyloxy)hexahydrofuro[3
通过与聚(甲基氢)硅氧烷,环氧单体2-(烯丙氧基甲基)环氧乙烷的一步氢化硅烷化反应,将几种含有环氧基和介晶组分的新型手性侧链液晶(LC)聚硅氧烷树脂接枝共聚,并进行手性氟化液晶单体4'-(4-(烯丙氧基)苯甲酰氧基)联苯-4-基6-(全氟辛酰氧基)六氢呋喃[ 3,2-b ]呋喃-3-基己二酸酯和4'-(4-(十一月10 -烯酰氧基)苯甲酰氧基)联苯-4-基6-(全氟辛酰氧基)六氢呋喃[ 3,2-b]己基-3-呋喃基己酸酯。使用4,4'-二氨基二苯基甲烷在中间相状态下在磁场下固化合成的环氧树脂,以获得交联的取向弹性体。单体,树脂和液晶弹性体(LCE)的化学结构,LC特性和表面形态通过多种实验技术进行表征,例如FTIR,1 H NMR,EA,TGA,DSC,POM和X-射线测量。合成树脂和相应的取向弹性体的介晶性能受到末端全氟化碳链组分的有效影响。树脂显示手性向列相和手性近晶C相(小号C*),以及