...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >Strategy of regulating the electrophilic/nucleophilic ability by ionic ratio in poly(ionic liquid)s to control the coupling reaction of epoxide
【24h】

Strategy of regulating the electrophilic/nucleophilic ability by ionic ratio in poly(ionic liquid)s to control the coupling reaction of epoxide

机译：调控策略亲电或亲核离子能力的比率在聚(离子液体)年代控制耦合反应的环氧

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Although poly(ionic liquid)s (PILs) have received extensive attention and research, the strategy for designing efficient PILs catalysts remains a challenge. This work reports a series of efficient PILs catalysts with increasing ionic ratio and various anion species to regulate electrophilic/nucleophilic ability, and explores the effect of the ionic ratio on the coupling reaction of propylene oxide (PO) with CO2 or methanol. These PILs are synthesized by a quaternization reaction between poly(N-vinylimidazole) (PVIM) and dihaloalkanes, where the amount of crosslinker of dihaloalkanes controls the ionic ratio of PILs, further affecting their microcosmic environment, morphologies and properties. It is noteworthy that the ionic ratio with IL units and imidazoline group can work as a trigger and promoter in the coupling reaction of PO with CO2 or methanol. The ionic ratio could open the reaction compared with the parent PVIM and the choice of anion could turn the reaction on or off. It suggested that the active microstructure and electrophilic/nucleophilic ability of PILs could be regulated by the ionic ratio. In these active sites, the IL units-connected imidazoline group could weaken the interaction of the cation-anion, giving enhanced leaving ability of the anion, contributing to the excellent catalytic performance.
机译：虽然聚(离子液体)年代(得利)已收到广泛的关注和研究,战略有效而得利的设计仍然是一个催化剂挑战。高效而得利与增加离子催化剂比例和各种阴离子物种来调节亲电或亲核的能力和探索离子的影响比耦合反应的环氧丙烷(PO)与二氧化碳甲醇。碱化反应之间的反应在交联剂的量dihaloalkanes吗进一步控制离子的比例而得利,影响他们的微观环境,形态和属性。与IL单位和离子比例咪唑啉组可以作为触发和工作启动子与二氧化碳PO的耦合反应或甲醇。相比之下,父母PVIM和反应选择阴离子可以开启或反应掉了。与亲电或亲核得利)的能力可能是由离子比例。活动网站,IL units-connected咪唑啉集团可能会削弱的交互作用cation-anion,给离开的能力增强阴离子,导致优秀的催化性能。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号