...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymers for advanced technologies >Ionic liquid-based luminescent composite materials
【24h】

Ionic liquid-based luminescent composite materials

机译：离子液体基发光复合材料

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

Luminescent composite materials based on semiconductor nanocrystals (NCs) with ionic liquid and subsequently with an ionic liquid-based polymer have been prepared. Cationic CdTe NCs passivated with thiocholine bromide (TCB) were prepared in an aqueous phase and easily transferred to hydrophobic ionic liquids by means of a simple biphasic extraction process without using any surfactant. TCB-capped CdTe NCs were stably dispersed in hydrophobic ionic liquids and their absorption spectra and optical density (extinction coefficient) were maintained even after the extraction. While the emission peak position was also identical with the original one, its intensity increased almost twice. The efficient extraction and photoluminescence enhancement of CdTe NCs were generally observed for the hydrophobic ionic liquids based on both bis(trifluoromethanesulfonyl) imide (TFSI) and hexafluorophosphate (PF{sub}6) anions. However, the generation of a trace of hydrofluoric acid gradually collapsed the CdTe NCs in a PF{sub}6-based ionic liquid. A polymerizable ionic liquid which possesses an acrylate group could also extract the CdTe NCs from water and gave a CdTe NC-polymer composite with strong luminescence by the polymerization of ionic liquid.
机译：已经制备了基于具有离子液体并且随后具有基于离子液体的聚合物的半导体纳米晶体（NC）的发光复合材料。在水相中制备了被溴化硫代胆碱（TCB）钝化的阳离子CdTe NCs，并通过简单的两相萃取工艺轻松转移到疏水性离子液体中，而无需使用任何表面活性剂。 TCB封端的CdTe NCs稳定地分散在疏水性离子液体中，甚至在萃取后仍保持其吸收光谱和光密度（消光系数）。虽然发射峰的位置也与原始峰相同，但其强度几乎增加了两倍。对于基于双（三氟甲烷磺酰基）酰亚胺（TFSI）和六氟磷酸根（PF {sub} 6）阴离子的疏水性离子液体，通常观察到CdTe NCs的有效提取和光致发光增强。但是，痕量氢氟酸的产生逐渐使基于PF {sub} 6的离子液体中的CdTe NCs崩溃。具有丙烯酸酯基的可聚合离子液体也可以从水中提取CdTe NCs，并通过离子液体的聚合得到具有强发光性的CdTe NC-聚合物复合物。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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