Macrocyclic Ligands with Partially Fluorinated Sidearms: Synthesis and Metal Ion Complexation
作者:Sadik Elshani、Evgeny Kobzar、Richard A. Bartsch
DOI:10.1016/s0040-4020(00)00248-9
日期:2000.5
aza-18-crown-6, 1,10-diaza-18-crown-6 and 1,4,8,12-tetraazacyclopentadecane with partially fluorinated substituents attached to nitrogen are prepared. Their efficiencies and selectivities in alkali metal and silver picrate extractions from aqueous solutions into chloroform are determined and compared with those of appropriate model compounds. Ionophores with longer spacers of –CH2OCH2CH2– and –CH2CH2OCH2CH2–
带有部分氟化物的aza-12-crown-4,aza-15-crown-5,aza-18-crown-6、1,10-diaza-18-crown-6和1,4,8,12-四氮杂环戊烷的衍生物制备与氮连接的取代基。确定了它们在从水溶液中萃取到氯仿中的碱金属和苦味酸银中的效率和选择性,并与适当的模型化合物进行了比较。在大环的氮原子和全氟烷基之间具有较长的–CH 2 OCH 2 CH 2 –和–CH 2 CH 2 OCH 2 CH 2 –间隔基的离子载体显示出比具有较短的类似物更高的萃取效率由一个或两个亚甲基组成的间隔基。
Solvate and protic ionic liquids from aza-crown ethers: synthesis, thermal properties, and LCST behavior
In recent years, solvate and protic ionic liquids (ILs) have attracted much attention. We synthesized both types of ILs from alkyl aza-crownethers (L = N-propyl-1-aza-15-crown-5 (L1) and N-C6F13C2H4-1-aza-15-crown-5 (L2)). The solvate ILs [ML][Tf2N] (M = Na+, K+) were solids (Tm = 58–68 °C), whereas the solvate ILs [ML][Tf2N] (M = Li+, Ag+) and protic ILs [HL][Tf2N] were liquids with low glass transition
近年来,溶剂化物和质子离子液体(ILs)引起了很多关注。我们从烷基氮杂-皇冠醚(L = N-丙基-1-氮杂-15-皇冠-5(L 1)和N -C 6 F 13 C 2 H 4 -1-氮杂-15-合成了两种类型的IL表冠5(L 2))。溶剂化ILs [ML] [Tf 2 N](M = Na +,K +)为固体(T m = 58–68°C),而溶剂化ILs [ML] [Tf 2 N](M = Li +,Ag +)和质子ILs [HL] [Tf 2N]是玻璃化转变温度低的液体。含有Na离子的IL比其他IL更结晶,并且具有更高的熔点。质子IL的分解温度高于溶剂化物IL的分解温度。还合成了具有顺磁性阴离子的质子IL [HL 1 ] [FeCl 4 ](T m = 70.5°C),并确定了其晶体结构。该溶剂化物离子液体[NAL 2 ] [X](X =氯-,CF 3 CO 2 -,TSO -,PhSO 3